Boeing 747-436, G-BNLE
The aircraft was parked on a remote stand situated to the east of Terminal 4. In preparation to disembark the passengers a self propelled passenger stair vehicle was positioned at the No.2 left aircraft door. Having positioned the stair head against the aircraft’s door sill the vehicle operative extended the vehicles hydraulically powered stabilisation jacks. As these jacks extended the stair height hydraulic jacks retracted allowing the lower forward edge of the stair head to descend into the honeycomb wing to fuselage fairing where it came to rest. An engineering examination found that there had been an electrical component failure.
Boeing 747-436, G-BNLE 05-07.pdf (232.52 kb)