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  • B732, en-route, Maui Hawaii, 1988 (Synopsis: On 28 April 1988, a Boeing 737-200, operated by Aloha Airlines experienced an explosive depressurisation and structural failure at FL 240. Approximately 5.5 metres (or 18 feet) of cabin covering and structure was detached from the aircraft during flight. As result of the depressurisation, a member of the cabin crew was fatally injured. The flight crew performed an emergency descent, landing at Kahului Airport on the Island of Maui, Hawaii.)
  • B733, en-route, north of Yuma AZ USA, 2011 (Synopsis: On 1 April 2011, a Southwest Boeing 737-300 climbing through FL340 experienced a sudden loss of pressurisation as a section of fuselage crown skin ruptured. A successful emergency descent was made with a diversion to Yuma, where the aircraft landed half an hour later. Investigation found that the cause of the failure was an undetected manufacturing fault in the 15 year-old aircraft. One member of the cabin crew and an off duty staff member who tried to assist him became temporarily unconscious after disregarding training predicated on the time of useful consciousness after sudden depressurisation.)
  • B734, en-route, east northeast of Tanegashima Japan, 2015 (Synopsis: On 30 June 2015, both bleed air supplies on a Boeing 737-400 at FL370 failed in quick succession resulting in the loss of all pressurisation and, after making an emergency descent to 10,000 feet QNH, the flight was continued to the planned destination, Kansai. The Investigation found that both systems failed due to malfunctioning pre-cooler control valves and that these malfunctions were due to a previously identified risk of premature deterioration in service which had been addressed by an optional but “recommended” Service Bulletin which had not been taken up by the operator of the aircraft involved.)
  • B735, en-route, SE of Kushimoto Wakayama Japan, 2006 (Synopsis: On 5 July 2006, during daytime, a Boeing 737-500, operated by Air Nippon Co., Ltd. took off from Fukuoka Airport as All Nippon Airways scheduled flight 2142. At about 08:10, while flying at 37,000 ft approximately 60 nm southeast of Kushimoto VORTAC, a cabin depressurization warning was displayed and the oxygen masks in the cabin were automatically deployed. The aircraft made an emergency descent and, at 09:09, landed on Chubu International Airport.)
  • B737 en-route, Glen Innes NSW Australia, 2007 (Synopsis: On 17 November 2007 a Boeing 737-700 made an emergency descent after the air conditioning and pressurisation system failed in the climb out of Coolangatta at FL318 due to loss of all bleed air. A diversion to Brisbane followed. The Investigation found that the first bleed supply had failed at low speed on take off but that continued take off had been continued contrary to SOP. It was also found that the actions taken by the crew in response to the fault after completing the take off had also been also contrary to those prescribed.)
  • B737, en-route, northwest of Philadelphia PA USA, 2018 (Synopsis: On 17 April 2018, sudden uncontained left engine failure occurred to a CFM56-7B powered Boeing 737-700 when climbing through approximately FL320. Consequent damage included a broken cabin window causing rapid decompression and a passenger fatality. Diversion to Philadelphia without further significant event then followed. A single fan blade was found to have failed due to undetected fatigue. The Investigation noted that the full consequences of blade failure had not been identified during engine / airframe type certification nor fully recognised during investigation of an identical blade failure event in 2016 which had occurred to another of the same operator’s 737-700s.)
  • B737, en-route, west southwest of Pensacola FL USA, 2016 (Synopsis: On 27 August 2016, debris from sudden uncontained failure of the left CFM56-7B engine of a Boeing 737-700 climbing through approximately FL 310 west southwest of Pensacola in day VMC penetrated the fuselage barrel and caused a rapid depressurisation. An emergency descent and a diversion to Pensacola followed without further event. The Investigation found that collateral damage had followed low-cycle fatigue cracking of a single fan blade due to a previously unrecognised weakness in the design of this on-condition component which, because it had not been detected during the engine certification process, meant its consequences “could not have been predicted”.)
  • B738, en-route, southern Austria, 2010 (Synopsis: On 9 May 2010, Boeing 737-800 being operated by Swedish operator Viking Airlines on a public transport charter flight from Sharm el Sheikh, Egypt to Manchester UK and which had earlier suffered a malfunction which affected the level of redundancy in the aircraft pressurisation system, experienced a failure of the single air conditioning pack in use when over southern Austria and an emergency descent and en route diversion to Vienna were made. There were no injuries to any of the 196 occupants.)
  • B744, en-route, South China Sea, 2008 (Synopsis: On 25 July 2008, a Boeing 747 suffered a rapid depressurisation of the cabin following the sudden failure of an oxygen cylinder, which had ruptured the aircraft's pressure hull. The incident occurred 475 km north-west of Manila, Philippines.)
  • B764, en-route, Audincourt France, 2017 (Synopsis: On 23 August 2017, a Boeing 767-400ER which had departed Zurich for a transatlantic crossing experienced a problem with cabin pressurisation as the aircraft approached FL 100 and levelled off to run the applicable checklist. However, despite being unable to confirm that the pressurisation system was functioning normally, the climb was then re-commenced resulting in a recurrence of the same problem and a MAYDAY emergency descent from FL 200. The Investigation found that an engineer had mixed up which pressurisation system valve was to be de-activated before departure and that the flight crew decision to continue the climb had been risky.)
  • B788, en-route Shikoku Island Japan, 2013 (Synopsis: On 16 January 2013, a main battery failure alert message accompanied by a burning smell in the flight deck was annunciated as an ANA Boeing 787-8 climbed through FL320 on a domestic flight. A diversion was immediately initiated and an emergency declared. A landing at Takamatsu was made 20 minutes later and an emergency evacuation completed. The Investigation found that the battery had been destroyed when thermal runway followed a suspected internal short circuit in one of the battery cells and concluded that certification had underestimated the potential consequences of such a single cell failure.)
  • BA11, en-route, Didcot Oxfordshire UK, 1990 (Synopsis: On 10 June 1990, a BAC 1-11 operated by British Airways, during climb, experienced sudden explosive depressurisation which resulted in loss of the left hand windscreen. The commander was sucked in the windscreen aperture and was successfully secured by the cabin crew, while the first officer executed a safe landing.)
  • DC86, en-route, Narrows VA USA, 1996 (Synopsis: On 22 December 1996, during a post-maintenance airworthiness function flight at night in IMC, a Douglas DC8 operated by Airborne Express failed to recover from an intentional approach to the stall and loss of control without recovery followed leading to impact into mountainous terrain in the vicinity of Narrows, Virginia.)
  • DC93, en-route, Cincinnati OH USA, 1983 (Synopsis: On 2 June 1983, a DC9 aircraft operated by Air Canada was destroyed following an in-flight fire which began in one of the aircraft’s toilets. 23 passengers died in the accident.)
  • LJ35, Lyon France, 2000 (Synopsis: On 2 May 2000, the crew of a LJ35 lost control of the aircraft, as a result of incorrect manual flying inputs, and crashed just before touchdown at Lyon, following an unstable single engine approach.)
  • RJ1H, en-route, South West of Stockholm Sweden, 2007 (Synopsis: On 22 March 2007, climbing out of Stockholm Sweden, the crew of a Malmö Aviation Avro RJ100 failed to notice that the aircraft was not pressurised until cabin crew advised them of automatic cabin oxygen mask deployment.)