AD 2003-19-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 777 | Airworthiness Directives; Boeing Model 777 Series Airplanes |
Unsafe Condition
Seal assemblies on the outboard leading edge slats with undersized (incorrect diameter) seal inserts and missing or gapped inserts, which could result in cracking of the slats, subsequent separation of the cove skin, structural damage or loss of the trailing edge wedge, and consequent reduced controllability of the airplane.
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Required Actions
Inspect the outboard leading edge slats on the wings for seal assemblies with undersized seal inserts and missing or gapped inserts. Replace seal assemblies with new ones if incorrect diameter inserts are found or if the inspection is inconclusive. Install insert segments into the ends of the seal assembly if correct diameter inserts have receded. For airplanes with missing or gapped inserts, perform a cove skin inspection for cracking and follow the specified corrective actions, including stop-drilling, internal inspections, repairs, and slat adjustment checks. Optional replacement of seal assemblies is also provided.
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Compliance Time
Within 12 months of the effective date (October 8, 2003)
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Affected Aircraft
Boeing Model 777 series airplanes with seal assemblies installed during production with undersized or missing/gapped inserts, as specified in Boeing Alert Service Bulletin 777-57A0034, Revision 7, dated May 22, 2003.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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