Accident McDonnell Douglas DC-9-83 (MD-83) G-DEVR,

ASN Wikibase Occurrence # 324719

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Date:	Thursday 27 April 1995
Time:	23:16
Type:	McDonnell Douglas DC-9-83 (MD-83)
Owner/operator:	Airtours International
Registration:	G-DEVR
MSN:	49941/1793
Year of manufacture:	1990
Total airframe hrs:	18236 hours
Cycles:	6386 flights
Engine model:	Pratt & Whitney JT8D-219
Fatalities:	Fatalities: 0 / Occupants: 178
Aircraft damage:	Substantial, repaired
Category:	Accident
Location:	Manchester International Airport (MAN) - United Kingdom
Phase:	Landing
Nature:	Passenger - Non-Scheduled/charter/Air Taxi
Departure airport:	Las Palmas-Airport de Gran Canaria (LPA/GCLP)
Destination airport:	Manchester International Airport (MAN/EGCC)
Investigating agency:	AAIB
Confidence Rating:	Accident investigation report completed and information captured

Narrative:
The aircraft landed at Manchester at 23:16 and the commander took control from the first officer during the latter part of the landing roll. As he applied increased pressure to the brakes there was a loud bang and the left wing dropped as the left main landing gear collapsed. The aircraft came quickly to a halt and the commander decided to disembark the passengers via the front passenger entrance door and stairs. The cabin supervisor experienced a problem with the stairs and, after a discussion with the commander, the passengers were evacuated via the front and rear service doors using the escape slides. An orderly evacuation ensued with only minor injuries being sustained; all passengers had left the aircraft by 23:26.

PROBABLE CAUSE: "(1) The left MLG outer cylinder failed on the application of bending loads resulting from normal braking due to the presence of a fatigue crack, 5 mm long by 1.25 mm deep, located on the front face of the cylinder, close to a change in section, where bending stresses were maximum.; (2) The fatigue origin was associated with surface features produced by the gritblasting used to prepare the steel surface for high current density cadmium plating.; (3) Loads not predicted during the MLG design were encountered early in the aircraft's life when 'gear walking', a MLG foreandaft vibration mode, was encountered. As a result fatigue initiated and propagated through the immediate compressive subsurface layer produced by shotpeening and designed to improve fatigue resistance."

Accident investigation: