Event Details

Title:Tire tread loss, damage, Boeing 737-436, G-DOCV
Micro summary:This Boeing 737-436 experienced a loss of tire tread, resulting in significant gear well damage.
Event Time:1996-06-10 at 1933 UTC
File Name:1996-06-10-UK.pdf
Publishing Agency:Aircraft Accident Investigation Board (AAIB)
Publishing Country:United Kingdom
Report number:EW/G96/06/13
Diversion Airport:Glasgow Airport
Site of event:Takeoff
Departure:London Heathrow Airport, London, England, United Kingdom
Destination:Inverness Airport, Dalcross, Scotland
Airplane Type(s):Boeing 737-436
Flight Phase:Landing
Operator(s):British Airways
Type of flight:Revenue
Serious Injuries:0
Other Injuries:0
Diverted to:Glasgow Airport
Executive Summary:The aircraft was taking-off on Runway 27R at Heathrow Airport for a scheduled flight to Inverness. The wind was from 270M at 5 kt, ambient temperature was 20C and the runway surface was dry. The crew felt a slight shimmy on take-off rotation at 135 kt and ATC subsequently advised that tyre and metallic debris had been found on the runway.

The flight diverted to Glasgow Airport. On arrival a low pass was made in order for ground personnel to view the underside of the aircraft; this failed to positively identify the problem. The aircraft then made an uneventful landing at Glasgow. It was found that the right hand tyre of the right main landing gear was severely distressed, with the entire tread missing, together with substantial parts of the carcass outer plies. The landing gear door had been severely damaged and damage had also resulted to hydraulic pipelines and to an electrical cable conduit associated with the right landing gear anti-skid system. The wing flap trailing edge and the under surface of the No 5 spoiler panel were also damaged.

Information from the operator suggested that the tyre tread had partially separated following damage inflicted by contact with a foreign object. A piece of metallic debris was found in the same area as the tyre debris; it was identified as a blocker door from a Rolls Royce RB211-524G or 524H engine but it was not possible to ascertain its origin. Examination of the tyre by the manufacturer found no signs of pre-failure defect and also indicated that the damage was most likely to have been caused by impact with a sharp object when the tyre had been rotating at high speed. It appeared that the flailing tread had caused the damage to the landing gear door, the hydraulic pipes and the electrical cables and that the damaged door had then detached under aerodynamic loading and struck the flap and the spoiler.
Learning Keywords:Systems - Electrical
Systems - Hydraulics
Systems - Landing Gear
Systems - Landing Gear - Tires
Consequence - Damage - Airframe or fuselage


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