Landing Gear - Nose Landing Gear Lock Link Assembly - Modification
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected Boeing 787-8, 787-9, and 787-10 airplanes must install the apex pin inner bore insert in the NLG lock link assembly as specified in Boeing Requirements Bulletin B787-81205-SB320040-00 RB, Issue 001, dated March 12, 2019. The modification must be completed by January 16, 2020, the effective date of the AD. Operators should follow the FAA-approved procedures and may contact Boeing for guidance on marking the modification if desired.
Summary
Federal Aviation Administration Airworthiness Directive 2019-23-07 is a final rule addressing certain Boeing Model 787-8, 787-9, and 787-10 airplanes. It targets an unsafe condition involving the nose landing gear (NLG) retracting on the ground due to incorrect installation of the NLG downlock pin in the apex pin inner bore of the NLG lock link assembly. This directive mandates a modification to prevent incorrect pin installation.
What changed
This new airworthiness directive requires installing an insert in the apex pin inner bore of the NLG lock link assembly to prevent incorrect installation of the downlock pin. It introduces a design modification to affected Boeing 787 airplanes, specifically line numbers 6 through 848 inclusive, to address the unsafe condition. The directive does not require changing part numbers but allows operators to mark the modification according to their procedures.
Why it matters
This AD is critical for aviation professionals because incorrect installation of the NLG downlock pin can cause the nose landing gear to retract while the airplane is on the ground, posing serious safety risks to personnel and passengers and risking substantial aircraft damage. Operators, maintenance, and compliance teams must ensure the modification is applied to maintain airworthiness and prevent ground incidents. Proper configuration control and adherence to the AD ensure continued safe operation of affected Boeing 787 aircraft.
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