From SKYbrary Wiki
Stress is a bodily response to a stimulus that disturbs or interferes with the “normal” physiological equilibrium of a person and, in the context of aviation, refers to a state of physical, mental or emotional strain due to some external or internal stimulus.
Understanding the factors that lead to stress, as well as how to cope with stressful situations, can greatly improve a individual's performance. Also, understanding that colleagues may react differently to the same stressor is important and can help you control a situation that can quickly get out of hand if an individual is having a negative reaction.
Accidents & Incidents
Events on the SKYbrary database which list stress as a significant contributory factor:
- A320, vicinity Oslo Norway, 2008 (On 19 December 2008, an Aeroflot Airbus A320 descended significantly below its cleared and acknowledged altitude after the crew lost situational awareness at night whilst attempting to establish on the ILS at Oslo from an extreme intercept track after a late runway change and an unchallenged incorrect readback. The Investigation concluded that the response to the EGPWS warning which resulted had been “late and slow” but that the risk of CFIT was “present but not imminent”. The context for the event was considered to have been poor communications between ATC and the aircraft in respect of changes of landing runway.)
- A320, vicinity Sochi Russia, 2006 (On 3 May 2006, an Airbus 320 crew failed to correctly fly a night IMC go around at Sochi and the aircraft crashed into the sea and was destroyed. The Investigation found that the crew failed to reconfigure the aircraft for the go around and, after having difficulties with the performance of an auto go-around, had disconnected the autopilot. Inappropriate control inputs, including simultaneous (summed) sidestick inputs by both pilots were followed by an EGPWS PULL UP Warning. There was no recovery and about a minute into the go around, a steep descent into the sea at 285 knots occurred.)
- SW4, Cork Ireland, 2011 (On 10 February 2011, control of a Spanish-operated Fairchild SA227 operating a scheduled passenger flight from Belfast UK to Cork, Ireland was lost during an attempt to commence a third go around due to fog from 100 feet below the approach minimum height. The Investigation identified contributory causes including serial non-compliance with many operational procedures and inadequate regulatory oversight of the Operator. Complex relationships were found to prevail between the Operator and other parties, including “Manx2”, an Isle of Man-based Ticket Seller under whose visible identity the aircraft operated. Most resultant Safety Recommendations concerned systemic improvement in regulatory oversight effectiveness.)
- B734, en-route, New South Wales Australia, 2007 (On 11 August 2007, a Qantas Boeing 737-400 on a scheduled passenger service from Perth, WA to Sydney, NSW was about three quarters of the way there in day VMC when the master caution light illuminated associated with low output pressure of both main tank fuel pumps. The flight crew then observed that the centre tank fuel pump switches on the forward overhead panel were selected to the OFF position and he immediately selected them to the ON position. The flight was completed without further event.)
- B752, vicinity Cali Colombia, 1995 (On 20 December 1995, an American Airlines Boeing 757-200 inbound to Cali, Colombia made a rushed descent towards final approach at destination and the crew lost positional awareness whilst manoeuvring in night VMC. After the crew failed to stow the fully deployed speed brakes when responding to a GPWS ‘PULL UP’ Warning, the aircraft impacted terrain and was destroyed with only four seriously injured survivors from the 163 occupants surviving the impact. The accident was attributed entirely to poor flight management on the part of the operating flight crew, although issues related to the FMS were found to have contributed to this.)
Related OGHFA Situational Examples
|Situational Example||Flight Phase|
|De-icing and Latent Organisational Factors (OGHFA SE)||Take Off|
|Disorientation During Vectored Go-Around (OGHFA SE)||Missed Approach|
|Fuel Leak and Confirmation Bias (OGHFA SE)||Climb, Cruise, Descent|
|Fuel Starvation, Stress, Fatigue and Nonstandard Phraseology (OGHFA SE)||Cruise, Descent|
|Landing Gear Failure (OGHFA SE)||Landing|
|Takeoff Weight Entry Error and Fatigue (OGHFA SE)||Take Off|
|Unidentified Fire On Board (OGHFA SE)||Cruise, Descent, Landing|
Related OGHFA Material
- Flight Safety Australia: Fit to Fly?
- Fighting Pilot Fatigue, video by Boeing’s Fatigue Risk Management team in partnership with Delta airlines to portray the effects of fatigue on pilots. It describes technologies in the flight deck that can monitor and prevent fatigue-related events.
- Safety Behaviours: Human Factors Resource Guide for Engineers, CASA (Australia), 2013. Chapter 6 deals with stress for maintenance personnel.