Fuel - Lightning Protection for Engine Fuel Feed System - Inspections
- Published
- Effective
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Affected operators must perform repetitive detailed inspections and bond resistance measurements of the bonding jumpers on the fuel feed tubes as specified in Boeing Alert Requirements Bulletin 777-28A0097 RB. They must also revise their maintenance or inspection programs to incorporate the new airworthiness limitations. All actions must be complied with by September 1, 2026, the effective date of this AD.
Summary
Fuel - Lightning Protection for Engine Fuel Feed System - Inspections is a Federal Aviation Administration (FAA) Airworthiness Directive (AD 2026-15-02) that applies to all Boeing Company Model 777-200, 777-200LR, 777-300ER, and 777F series airplanes equipped with General Electric GE90 series turbofan engines. This AD mandates repetitive detailed inspections and bond resistance measurements of bonding jumpers on the first fuel feed tube near the wing front spar at the main fuel tank penetrations, along with corrective actions and maintenance program revisions to incorporate new airworthiness limitations.
What changed
This AD supersedes AD 2024-19-14 by expanding the applicability to all Boeing 777 series airplanes and requiring additional repetitive inspections and bond resistance measurements. It also mandates revising existing maintenance or inspection programs to include specified airworthiness limitations. The AD clarifies compliance requirements and disallows previous methods of compliance after its effective date.
Why it matters
This AD addresses the risk of latent failures in lightning protection features of the engine fuel feed system that could create ignition sources inside fuel tanks, potentially leading to fuel tank explosions and loss of the airplane. Compliance ensures enhanced safety by preventing such hazardous conditions. Operators, maintenance, and compliance teams must update their procedures to meet these new inspection and maintenance requirements to maintain airworthiness and regulatory compliance.
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