A320 Flown on After Damaging Heavy Landing
A320 Flown on After Damaging Heavy Landing (Germania D-ASTP) The Spanish air accident investigators, the CIAIAC (Investigación de accidentes e incidentes de aviación civil), released a preliminary report (in Spanish) on 28 June 2017 on an incident involving Germania Airbus A321-200 D-ASTP on 16 July 2016. The aircraft was performing a flight from Düsseldorf to Fuerteventura, in the Canary Islands. The crew commenced a go-around due to the approach becoming unstabilised but still touched down hard with vertical acceleration subsequently determined to have been 3.32 g. After the subsequent landing: The crew performed an external check on the aircraft without encountering anomalies. The Commander established contact with the [operator’s] maintenance control centre (MOC) in Germany, to request confirmation and support on the on interpretation of the automatic report issued by the aircraft with respect to the hard landing. Its not clear what response (if any) was received as the CIAIAC go on: Due to the absence of maintenance support at the Fuerteventura airport and, in the absence of a criterion on the meaning of landing report code ‘Hard’, the crew decided to make the return flight to Dusseldorf. The aircraft departed with the return passengers aboard 83 minutes after landing. Once in Düsseldorf the aircraft was removed from service for inspection. The left hand Main Landing Gear (MLG) was found damaged and the right hand MLG also needed replacement. The CIAIAC note the first report of an occurrence was only received by them on 30 August 2016, over 2 months after the incident. Data that confirmed the touch down had been at 3.32g was only received in mid November 2016. The CIAIAC say their investigative research is complete and the final report is due ‘shortly’. UPDATE 22 December 2017: The CIAIAC issue their final report: The copilot, along with the captain, who had an instructor rating, decided to make the approach with thrust and control in manual. This resulted in a go-around after making contact with the runway. Until that moment, the flight had been uneventful. During the final approach phase, the approach unstabilized, primarily due to a drop in speed and to the airplane falling too low, and the captain executed a go-around. CIAIAC says the carrier acknowledged that its Airbus crews were “not well trained” for manual approaches owing to a “routine practice” of using automatic systems. The aircraft automatically generated and sent, via ACARS, an A15 hard-landing report to the company’s control center and to the manufacturer. The A15 or LOAD<15> report is generated if The normal acceleration is greater than 2.6 g at touchdown. If the aircraft weight exceeds the maximum landing gross weight, the normal acceleration is reduced to 1.7 g. The rate of descent on the radio altimeter is greater than 9 ft/sec at touchdown. If the aircraft weight exceeds the maximum landing gross weight, the radio altimeter descent rate is reduced to 6 ft/sec. During a bounced landing, the normal acceleration exceeds 2.6 g. The normal acceleration data is provided by an accelerometer mounted near the aircraft’s centre of gravity, though the sample rate means its possible the peak value may be missed. The investigators go on to say: Due to its physical effects, the crew realized that they had had a hard landing, and the captain apologized to the passengers and explained to them what had happened as they waited to be disembarked. But the crew did not have...
read moreCommon Comet Misconceptions and Collaborative Contribution to Safety
Common Comet Misconceptions and Collaborative Contribution to Safety Recently the 68th anniversary of the first flight of the prototype G-ALVG of pioneering jet airliner the de Havilland DH-106 Comet occured. As noted by Richard Gale of ADS: On Saturday 27th July 1949, the de Havilland Comet took off from Hatfield Aerodrome for its inaugural flight; reaching 10,000ft and circling the skies for approximately 31 mins. In the three years it took from the original drawing board to the first flight, the Comet instantly doubled the speed and altitude of air transport. It also brought in a whole range of new and innovative technology such as integral wing fuel tanks, engine-bled air for pressurisation and de-icing, and airbrakes. After a production line was set up, the first pure jet powered commercial flight took place in May 1952 to Johannesburg. In-Flight Break-Ups Tragically the Comet is also remembered for a series of in-flight break-ups in its first 2 years in service: 2 May 1953 British Overseas Airways Corporation (BOAC) Flight 783, Comet 1 G-ALYV, near Calcutta, India (43 fatalities) 10 January 1954 BOAC Flight 781, Comet 1 G-ALYP, Mediterranean, near Elba, Italy (35 fatalities) 8 April 1954 South African Airways (SAA) Flight 201, Comet 1 G-ALYY, near Naples, Italy (21 fatalities) The G-ALYV Calcutta accident occurred in a severe thunderstorms and the Court of Inquiry concluded the cause was: Structural failure of the airframe during flight through a thunder squall. In the opinion of the Court, the structural failure was due to overstressing which resulted from either: (1) Severe gusts encountered in the thunder squall, or (2) Overcontrolling or loss of control by the pilot when flying through the thunderstorm. As the FAA Lessons Learnt database notes, the cause this accident was reconsidered after subsequent accidents, and: The official cause of the Calcutta crash has never been anything other than the storm. The G-ALYP Elba accident occurred about 20 minutes into the flight as the aircraft climbed through 27,000 feet… …transmission from the crew ceased mid-sentence, indicating a failure of the aircraft with “catastrophic suddenness.” Witnesses on the island of Elba, Italy, saw the aircraft fall into the sea in flames. The search and salvage off Elba included the use of novel technologies, such as an underwater TV camera and continued during the summer of 1954: As described in the FAA Lessons Learnt database: The Comet fleet was grounded while investigation began and while de Havilland made modifications “to cover every possibility that imagination has suggested as a likely cause of the disaster.” These modifications were made to address any possible cause of failure including flutter of control surfaces, primary structural failure due to gusts, flying controls, explosive decompression, engine fire, failure of a turbine blade, and fatigue of the wing. Fatigue of the fuselage was not considered as a cause at this time, nor was a modification made to compensate for it. As these modifications were made, and while wreckage was still being recovered, the British Minister of Transport and Civil Aviation noted “the nature and extent of the modifications planned… and whilst the Calcutta disaster is completely accounted for… we cannot eliminate that the accident might have been due to some other cause which was possibly common to both disasters.” Believing the unknown cause of possibly two accidents had been fixed during the massive modification project, Comet flight was...
read moreSwedish Special Forces SPIES and Military SMS
Swedish Special Forces SPIES and Military SMS The Swedish Accident Investigation Authority (SHK) has issued their report (in Swedish but with an English summary) on a serious incident that occurred when a party of special force troops were being deployed on a trial underslung beneath Sikorsky UH-60M Black Hawk (known in Sweden as Helicopter 16), 16238. The Incident On 15 October 2015 the Swedish Armed Forces were conducting an Operational Evaluation (OPEVAL) trial of a new capability, called SPIE (Special Patrol Insertion and Extraction), to deliver a party of 11 troops by a 40m longline under a helicopter to the local ro-ro ferry Christina Brahe in Lake Vättern. The helicopter lost station momentarily and: The rope became caught in the vessel temporarily and the people on the rope were dragged towards the vessel’s gunwale, resulting in minor injuries. The Analysis The SHK say they were… …able to establish that there have been major shortcomings in both the production of the OPEVAL plan for SPIE and the implementation of OPEVAL SPIE. These shortcomings can primarily be traced back to limitations in terms of knowledge and relevant experience of similar mission profiles involving vessels. These shortcomings have been present throughout the chain of command, from the crew up to those with decision-making responsibility for the implementation. The lack of such expertise has resulted in no one at any level having understood what risks have been taken and the commander and his crew not having been given the requisite support in advance of and during the implementation of the operation. Splitting up the planning and implementation of OPEVAL SPIE between the Air Combat Training School’s Tactical Development Training Unit Helicopter (LSS UTV LUFT TU HKP) and the 23rd division of the Helicopter Wing has resulted in the areas of responsibility becoming unclear, which risks leading to essential actions not being taken. The SHK note that SPIE lacked an airworthiness approval so they concluded its use “was therefore not permitted”. They note… …there was a difference of opinion between the Swedish Defence Materiel Administration (FMV) and the Armed Forces concerning which requirements applied and how these were to be interpreted. This resulted in the Armed Forces believing it had more opportunities than before to approve new material for use in a simpler manner. They go on to say there were strong time pressures “as a result of a desire to develop new capabilities quickly”. Combined with the limited knowledge and experience of similar mission profiles involving vessels, this resulted in the work not taking place in a sufficiently structured and safe manner, which in turn led to risks not being identified and managed in an appropriate manner. A “can-do culture” exists. At the time of the occurrence, there was a lack of sufficient oversight from senior Flight Operations officers with respect to Flight Operations within the 23rd division. Without such oversight, operations cannot be led and controlled safely and in accordance with the Armed Forces’ regulations. The SHK note that the Supreme Commander’s 2010 direction to create a safety management system (SMS), based on international civilian standards, has not been implemented. they say: Parts of an SMS are described in the governance documents, but not in full and there are shortcomings in the application of those parts that do exist. The Swedish Military Flight Safety Inspectorate’s (FLYGI) supervisory operations have not been capable of...
read moreFalse Fire Warning and Unfeathered Propeller KA200 Accident
False Fire Warning and Unfeathered Propeller KA200 Accident Beechcraft B200 Super King Air VH-MVL of the Royal Flying Doctor Service (RFDS) was substantially damaged during a single engined landing on 13 December 2016. The Accident Flight The aircraft was conducting a visual approach to Moomba Airport, South Australia (SA), following an air ambulance flight from Innamincka, SA. According to the Australian Transport Safety Bureau (ATSB) safety investigation report: As the aircraft turned onto the base leg of the approach, the pilot observed the left engine fire warning activate. The ATSB comment that: The pilot was wearing an active noise reduction headset and the aircraft warning horns are broadcast through a cockpit speaker, rather than the intercom system. Consequently it was the warning light, rather than the warning horn which captured the pilot’s attention. The operator’s emergency checklist procedure….‘emergency engine shutdown’….included boxed bold type immediate actions… performed from memory: 1. Condition Lever… …FUEL CUT OFF 2. Prop Lever… …FEATHER 3. Firewall Shutoff Valve… …CLOSED 4. Fire Extinguisher… …ACTUATE (If required) The company procedure was to complete the immediate actions from memory and then reference the checklist to confirm immediate actions were completed before completing the remainder of the actions. In this case: The [pilot] pulled the [left engine] condition lever, then paused, then closed the firewall shutoff valve and pressed the extinguisher and confirmed it had discharged, all from memory, but there was no time to reference the checklist during the approach. The propeller feathering (i.e. to rotate the blades to an edge-on angle to the airflow) was omitted, so the left hand propeller was windmilling, and thus producing drag. The sole pilot commenced a right turn towards the runway. Due to the pilot’s position in the left seat, they were initially unable to sight the runway… The aircraft had flown through the extended runway centreline when the pilot sighted the runway to the right of the aircraft. The aircraft was low on the approach and the pilot realised that a sand dune between the aircraft and the runway was a potential obstacle. They increased the right engine power to climb power…raised the landing gear and retracted the flap to reduce the rate of descent. The aircraft cleared the sand dune and the pilot lowered the landing gear and continued the approach to the runway from a position to the left of the runway centreline. The aircraft landed in the sand to the left of the runway threshold and after a short ground roll, spun to the left and came to rest. There were no injuries and the aircraft was substantially damaged. Safety Investigation: Aerodynamics and Aircraft Performance The ATSB comment that: A windmilling propeller can produce a significant amount of drag, which is estimated to be comparable to a parachute canopy of the same area as the propeller disc area. In addition, the aircraft was in a right turn, towards the engine developing power, with the landing gear extended and the flaps set to approach. This combination resulted in more thrust being required for continued safe flight than was available. These factors adversely affected the aircraft performance. Safety Investigation: Pilot Actions and Pilot Training The pilot reported that they hesitated in their decision-making and subsequent engine fire drill actions because of their uncertainty in the veracity of the indication and their proximity to landing. At the time of the master...
read moreIncomplete Maintenance Leads to Fatal Collective Control Loss on B407
Incomplete Maintenance Leads to Fatal Collective Control Loss on B407 (N427 TVA) Bell 407 N427TV of the Tennessee Valley Authority (TVA) crashed on approach to a landing site in Kentucky on 11 July 2016 after maintenance errors during a critical maintenance task 38 flying hours prior. The Accident Flight The US National Transportation Safety Board (NTSB) report: A witness reported that there were no abnormalities…until it was approximately 75 to 100 feet above the ground. Suddenly, the main rotor tilted to the right. Immediately after, the entire helicopter banked to its right and fell to the ground on its right side, where it came to rest. The pilot was killed in the impact. The Safety Investigation Initial examination of the wreckage revealed that the collective lever, which connected the cockpit collective controls to the main rotor, was disconnected from the pivot sleeve. The collective lever is located to the front and bottom of the swashplate support. It is linked to the cockpit collective leaver and vertically moves the pivot sleeve to simultaneously change the pitch on all four main rotor blades. The collective lever pins and screws that attached the collective lever to the pivot sleeve were missing; …they were later found loose, near the main rotor area. The safety wires [i.e the wire locking] intended to secure the screws to the pins were missing. Examination of the hardware at the NTSB Materials Laboratory revealed that the safety wires not present, and the screws backed out over time, resulting in the complete loss of collective control in flight. The NTSB elaborate: The maintenance tasks performed during the inspections between May 31, 2016, and June 20, 2016 [38 flying hours previously], did not require the removal of the collective lever or the disconnection or inspection of the collective lever pins or screws. Although an inspection of the condition of the flight control bolts and nuts was one of the maintenance tasks performed, an inspection of the collective lever pins, screws, and corresponding lockwire was not included in that inspection. The maintenance and inspections of the helicopter’s flight controls, including the collective control, were performed by two TVA airframe and powerplant mechanics and one TVA foreman, who assisted in the work and supervised the operation. One of the mechanics re-installed an anti-drive lever assembly. He did not recall removing the lockwire on the collective lever pin screws or removing the pins. He stated that the other mechanic performed the 24-month inspection of the flight control bolts and nuts. He further stated that the collective lever pins were not part of that inspection. The other mechanic performed the 24-month inspection of the flight control bolts and nuts. When asked if he removed the collective lever pins, he responded, “No, I don’t remember doing it. If anyone would have done it, it would have been me, but I don’t remember doing it.” The foreman inspected the work performed in the area of the flight controls. He reported that the removal of the collective lever pins “…was not part of the required maintenance performed.” He was not aware that the pins were removed or that any lockwire was removed. He added further, “I could see why it could have been done. The 24-month flight control bolt inspection was being performed, why not pull them and look at them too. I’ve done it before.”...
read moreS-92A Collision with Obstacle while Taxying
S-92A Collision with Obstacle while Taxying The Norwegian Accident Investigation Board (AIBN) has issued their report into a collision of Sikorsky S-92A LN-OND with a parked truck at Stavanger Sola airport on 5 July 2016. During taxyng to a helicopter stand, the main rotor blades of the Bristow Norway helicopter hit the side of truck parked at the site on airfield works. All four main rotor blades were damaged. Two workers standing alongside and in the truck, were slightly injured by blade debris. The Scene of the Accident There was construction work in progress for new helicopter stands for Avinor AS (the airport operator) by their main contractor Stangeland AS and sub-contractor Microtrenching AS. Microtrenching had been working on stands 60-63. On the evening of 4 July 2016 they requested permission from Airport Operations to relocate to stand 64, on the opposite side of Taxiway D, but without discussing this with the prime contractor who were not on site at the time. They parked within a series of red and white concrete barriers on the stand. During the 5 July 2017 17 helicopters taxyed along Taxiway D without incident or raising a concern, even though the concrete barrier was just 7.6m from the centreline (in contrast the rotor diameter of an S-92A is 18.5m). However crucially, no risk assessment had been done for the apron works, contrary to local regulations. Furthermore, no Notification of Work (NoW) or associated Job Safety Analysis (JSA) was prepared or issued for the new location. The NoW would have contained specific requirements for the safe completion of the work and triggered a NOTAM. Being closer than 22m to the centre line would have meant, under Avinor’s procedures, the taxiway should have been closed. The Accident Just before 15:00 Local Time LN-OND was returning from the Draupner offshore installation. After landing on Runway 29, they were given permission to taxy to Apron 7 via Taxiway D. The Pilot Flying was in the left hand seat and the Pilot Monitoring in the right hand seat. They had used Taxiway H when they had heading for the runway that morning. They were heading for Stand 61 and encountered two parted helicopters to the right on Stands 62 and 63 and the construction work to the left on Stand 64. Two trucks were parked near the concrete barriers alongside the taxiway (8.4m from the centre line). Safety Analysis Both pilots commented that judging the clearance was difficult. However, being aware that other aircraft had been routed that way successfully earlier in the day were confident that if they followed the yellow centre-line markings they would remain clear of obstacles. The crew did also taxy slightly to the right however not enough to prevent the main rotor blades striking the vehicle. The AIBN note that: …the lack of project specific risk analysis lead to a lack of specific guidelines on how to handle the risk factors. AIBN misses safeguarding of safety distance from taxiing helicopters, plans for parking of vehicle and equipment, plans for closing off construction areas, and role clarifications for the personnel involved. Furthermore, several of the instructions in the handbook for Airside safety were not followed, which contributed to the accident. Heavy white and red concrete blocks where placed along the asphalt edge at new helicopter stand where the truck was wrongly parked. The concrete blocks had been positioned in April 2016 to prevent a repetition...
read moreElevator Failure: Moisture + Heat
Elevator Failure: Moisture + Heat The Royal Canadian Air Force (RCAF) have reported on the loss of part of an elevator from an Airbus A310 (known as a CC-150 Polaris), CC15004, on 8 May 2015. The aircraft departed an unspecified base in support of Operation IMPACT, the Canadian Armed Forces’ (CAF) support to operations against Daesh in Iraq and Syria at 15:10 Local Time. Upon successful completion of the mission the crew commenced their return home. Approximately 4 hours into the flight and 1 hour and 15 minutes from landing, the crew felt a significant, sudden vibration lasting approximately 3-4 seconds, and was felt in the control column, rudder pedals and throughout the entire aircraft. The crew checked all aircraft system pages on the Electronic Centralized Aircraft Monitoring (ECAM) system and nothing unusual was found. The flight continued without further incident and landed safely at 2024 (L). Upon landing, an exterior inspection revealed disbonding and in-flight departure of a portion of the right elevator trailing edge. Damage was assessed as minor. Safety Investigation The investigation determined that high surface temperature, due to the dark paint scheme, and moisture ingress affected the properties of the structural adhesive between the elevator skin and honeycomb core to an extent such that disbonds occurred under normal operation. Further Event Fourteen months following the original occurrence, two additional elevators sustained disbonding without separation of any portion of the elevator from the aircraft; these were also assessed as minor damage. The subsequent finding on 23 July 2016 was by Sean Askin, a civilian crew lead on a CC150 Polaris while deployed on operation and an employee of L-3 Communications – Military Aviation Services. Mr. Askin had been present during [the original incident] event and ever since, he took it upon himself to conduct an extra verification of the flight controls; an inspection not expected nor required as part of his routine duties. Such an extended post-flight inspection is made even more difficult by the extreme heat, with night-time lows of 43ºC on the ramp. Using his high powered flashlight, he examined the horizontal stabilizer from a distance and discovered an abnormality in the paint that that was not duplicated on the opposite elevator. His interest piqued, Mr. Askin requisitioned a high-stand for a closer inspection only to discover a delaminated area of approximately 12 by 60 inches. Safety Action A number of preventive measures have already been taken on the CC150 Polaris fleet, including: the application of a new light-color paint scheme on composite surfaces to minimize heating, increased frequency of elevator inspection, and revision of the preventive maintenance program to include X-ray on a regular basis as well as ensuring the condition of the sealant is part of each elevator inspection. In addition, a study on the potential effect of dark paint on the current RCAF inventory is in progress, along with a process review to ensure that a similar situation is not repeated. Background The RCAF have 5 CC-150 Polaris aircraft at 8 Wing at CFB Trenton, Ontario. As part of the Air Force Multi-Role Tanker Transport (MRTT) program, two CC-150s have been converted to strategic air-to-air refuellers for Canada’s fleet of CF-188 Hornets. These are painted in a dark grey colour scheme. As of 3 July 2017 CC-150s have flown 778 sorties in support of Operation IMPACT, delivered...
read moreDeliberate Action: A Mindful Method from the Nuclear Navy
Deliberate Action: A Mindful Method from the Nuclear Navy In his book Turn the Ship Around! David Marquet describes a technique developed while CO of the US Navy‘s Los Angeles Class SSN USS Santa Fe, to reduce errors and increase mindfulness during critical tasks. The Incident: USS Santa Fe, 29 January 1999, Pearl Harbour During the hook up to 440V shore power a Petty Officer violated the ‘red tag procedure’, intended to stop power being applied while a system was still in an unsafe condition. As he recounts: In this case, a sailor had energized breakers on the pier after the conditions for energizing them had been met (so there was no hazard), but he hadn’t cleared the red tag before doing so indicating we were just lucky). You don’t want to he accidentally safe. The Assumption It was widely assumed on-board that that being found to have violated of such a basic safety procedure would see the accused subject to the Captain’s Mast This is a process for judgement and non-judicial punishment, ‘pour encourager les autres’ to pay attention. But Marquet was a man on a mission to turnaround the USS Santa Fe, the worst performing submarine in the navy. The Investigation Marquet opened an investigative meeting: “Petty Officer M. can you tell me what happened?” “Well, I knew we met conditions to shut the breaker, and [was just thinking that was the next step in the procedure. We had the procedure out and had reviewed it. I knew the red tags were hanging but just moved them aside to shut the breaker. Not am what I was thinking.” Gasps. “You moved a red tag aside?” “Yes, it was hanging right in front of the breaker. There was one on each of the three pier breakers, three across, right then.” Murmuring. I’m sure he was expecting to go to captain’s mast and be fined. Yet, he was willing to tell us the truth quite bluntly without any attempt at obfuscation. This needed no be rewarded. “Thank you very much for your candor. You and the rest of the watch team can go home. Supervisors stay behind.” This caused a stir. What no recriminations? No captain‘s mast? No yelling? Marquet knew he was was taking a risk by behaving differently to expectations: However, I felt the candor and honesty of Petty Officer M were more important than continuing the current process of inquisition, fear, and punishment. So he turned to his supervisors: “Now, gentlemen, how are we going to prevent this from happening again?” And that’s what we spent the next seven and a half hours talking about. Developing a Solution The first suggestion? That old favourite: refresher training. Marquet dismissed this as there was no deficiency in knowledge. The next suggestion was more supervision. In discussion they realised that may have helped stop the second and third breakers being closed, but would have been too late to stop the first. Marquet pushed his team to come up with something that would prevented the initial error. Exasperated with my unwillingness to accept any of the rote answers, someone blurted out, “Captain, mistakes just happen!” Now we were getting somewhere. We discussed what it would take to reduce mistakes made at the deck plate level, at the interface between the operators and the equipment, not simply discover them afterward. These were mistakes such as...
read moreNorth Sea S-92A Helicopter Airprox Feb 2017
North Sea S-92A Helicopter Airprox Feb 2017 The UK Airprox Board (UKAB) has released their report into an airprox involving two Sikorsky S-92A offshore helicopters on 22 February 2017. While this was a relatively low risk Airprox their report does discuss some interesting human factors aspects. Information Reported to the Airprox Board S92(1) was inbound to Aberdeen from an offshore installation 132nm to the SE of Aberdeen, and S92(2) outbound to an offshore installation 180nm to the SE of Aberdeen. The Board say: The S92(1) pilot reports being in straight-and-level cruise in ‘good VMC’. He suddenly received a TA on TCAS with the target showing +400(ft). At the same time, the crew saw opposite direction traffic… slightly left of track, 400ft above. Both aircraft’s pilots took avoiding action by manoeuvering to the right. The S92(2) pilot reports that the crew transferred frequency as normal at 80nm outbound from the ADN [VOR beacon] and believed that they were instructed to set the McCabe regional pressure setting [RPS] of 997hPa at 90nm. This was read back, recorded on the OFP and set on the standby altimeter. At 90nm, 997hPa was applied and the aircraft descended to maintain 3000ft altitude outbound as standard procedure. The crew were alerted by a TCAS TA, and the handling pilot (captain) acquired the opposite direction traffic, an offshore helicopter, almost straight away. It had little relative movement but appeared lower and TCAS was displaying it as 400ft below. They turned approximately 30° to the right onto a diverging track… …subsequently the McCabe pressure was established to be 977hPa. The S92(2) pilot stated that, unusually, due to an increased sea state over most of the north sea and strong westerly winds there were very few aircraft operating in the area and apart from the initial contact with ATC there were very few opportunities to detect the incorrectly set McCabe pressure, if any. He also noted that communications were often problematic in the area, with transmissions only available ‘on test function’. Both aircraft turned right as per SERA.3210 Right-of-way (c)(1) Approaching head-on and both crew assessed the risk of collision as ‘none’. North Sea ATC Service Background The provision of ATC to offshore UK sector oil and gas helicopters is provided in a unique way. The Airpox Board explain: A surveillance system known as (WAM) is used to provide surveillance coverage down to very low altitudes over a vast area. Although the surveillance system is capable of monitoring aircraft to low levels, radio communications are more limited and the system architecture is not comprehensive enough for a full Deconfliction Service sufficient to meet regulatory approval. It is this factor that limits the type of ATC service available. Within 80nm of Aberdeen a Deconfliction Service is usually provided (by utilising land based radar and communications), but outside of this area, the highest level of service available is a Traffic Service. As the surveillance system being used beyond 80nm is based on Secondary Surveillance equipment only, then the Traffic Service is limited to SSR data only. Aircraft within the HELS and REBROS sectors can be assigned one of three QNHs depending on the area in which they are operating. The Aberdeen QNH is used within a range of 90nm from Aberdeen. Beyond 90 miles it is usual to use either the ‘Fulmar’ or ‘Miller’ QNH’s, which are obtained from specific off-shore installations. However,...
read moreHow do we Improve Human Performance in Today’s Aviation Business?
How do we Improve Human Performance in Today’s Aviation Business?: Aerossurance Supports 2017 HF in Aviation Safety Conference Aerossurance is pleased to be supporting the annual Chartered Institute of Ergonomics & Human Factors’ (CIEHF) Human Factors in Aviation Safety Conference for the third year running. We will be presenting for the second year running too. This year the conference takes place 13 to 14 November 2017 at the Hilton London Gatwick Airport, UK with the theme: How do we improve human performance in today’s aviation business? Aerossurance was keen to again support this excellent, independent, professional forum for discussion and exchanging of ideas on the latest research, development and application of Human Factors in Aviation Safety. The 2017 event will centre on five challenges in aviation safety human factors: How do we improve human performance in aviation systems? Are we managing fatigue in aviation? Is adaptive automation still a useful concept? Where are the human performance limits in remote operations (e.g. remote towers, drones)? Have maintenance human factors fallen off our agenda? Aerossurance will be presenting the Maintenance Observation Programme concept and promoting the RAeS Human Factors Group: Engineering Listening and Learning project with a poster. The format for the event has evolved with directed panel discussions following each section of papers. The aim is to: ….answer the questions above…as well as identifying ways forward which will create a closer connection between industry needs and aviation human factors research, so that the net result will be improved human performance in aviation. Aerossurance worked with the Flight Safety Foundation (FSF) to create a Maintenance Observation Program (MOP) requirement for their contractible BARSOHO offshore helicopter Safety Performance Requirements to help learning about routine maintenance and then to initiate safety improvements: Aerossurance can provide practice guidance and specialist support to successfully implement a MOP. We have previously discussed some of our thoughts, focused particular on airworthiness and maintenance matters here: Airworthiness Matters: Next Generation Maintenance Human Factors See also our LinkedIn Showcase on Maintenance Human Factors. UPDATE 24 June 2018: B1900D Emergency Landing: Maintenance Standards & Practices The TSB report posses many questions on the management and oversight of aircraft maintenance, competency and maintenance standards & practices. We look opportunities for forward thinking MROs to improve their maintenance standards and practices. Aerossurance has extensive practical experience in air safety management systems, aviation human factors, safety culture and safety leadership development. Contact us at: enquiries@aerossurance.com Follow us on LinkedIn and on Twitter @Aerossurance for our latest updates....
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