The just-released accident report on the Airbus A319 that lost both doors on one engine’s fan cowl on takeoff from London Heathrow Airport in May 2013 is a must-read for anyone involved in aviation safety, whether at a major airline or manufacturer, at an air taxi or just flying or maintaining GA aircraft. The issues raised by the events leading to the accident, and as the events were unfolding in the airplane, affect many areas of aviation–from aircraft design to maintenance to pre-flight inspections to communications between cabin and flight crew during an in-flight emergency. But the most significant aspect of the report relates to maintenance and maintenance human factors. After all, it was maintenance errors that began the chain of events that ultimately led to the in-flight emergency.
In this accident, the precipitating factor was that the engine fan cowl doors detached on takeoff because they had not been properly closed and latched after routine overnight maintenance. The A319 was substantially damaged and the crew had to make an emergency landing. The accident report details not only the obvious failures to comply with maintenance manual procedures but also less obvious contributing factors that left the cowling doors unlatched, including the mechanics’ schedules and likely effects of fatigue. The report also highlights impediments to discovering the open doors during the pre-flight inspections by the crew and ground personnel. In addition, it makes recommendations for, among other things, changing the design of fan cowl door latches to prevent a recurrence.