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British Airways 787 landing gear retracts on ground

, © AAIB

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LONDON - A British Airways Boeing 787-8 aircraft is undergoing repairs after its landing gear retracted on ground. The incident seemed highly avoidable.

The 787-8 G-ZBJB was just being loaded with cargo for a June 18 morning flight to Frankfurt. "Whilst carrying out a Dispatch Deviation Guide (DDG) procedure to clear maintenance messages relating to an existing Acceptable Deferred Defect (ADD), the Nose Landing Gear (NLG) retracted," British air accident authority AAIB said.

The retraction caused damage to the lower front fuselage, doors and engine cowlings. "Door 2 left (Door 2L) struck the top platform of the mobile steps, positioned at the door, which resulted in the door separating from the fuselage and one person, operating the cargo loader positioned at the forward cargo hold, received minor injuries," an AAIB report reads.

The DDG procedure actually required landing gear selection lever to be cycled with hydraulic power applied to the aircraft. To prevent the landing gear from retracting, the procedure required pins to be inserted in the nose and main landing gear downlocks.

"However, the NLG downlock pin was installed in the NLG downlock apex pin bore which was adjacent to the correct location to install the downlock pin. When the landing gear selector was cycled the NLG retracted", according to the AAIB report.

After a similar incident involving a Boeing 787 in 2018 the US civil aviation body FAA issued an Airworthiness Directive the following year with a 36-month compliance from 16 January 2020, to install an insert over the apex pin bore to prevent incorrect installation of the downlock pin. "But this had not yet been implemented on G-ZBJB," AAIB said.
©, AAIB | 16/07/2021 16:58

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