AD 2001-17-25
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 747 | Airworthiness Directives; Boeing Model 747 Series Airplanes |
Unsafe Condition
Cracking or corrosion of the aft trunnion of the wing landing gear, which could result in collapse of the wing landing gear and consequent reduced controllability of the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the wing landing gear at the trunnion for cracks and corrosion, as specified in Boeing Service Bulletin 747-32-2190, Revision 4. If cracks or corrosion are found, remove and rework or replace cracked/corroded parts. Perform repetitive inspections at intervals not to exceed 6 months or 18 months, depending on the inspection method used. High frequency eddy current inspections may be required for corrosion findings. Repetitive overhaul of the wing landing gear is also required.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 120 days after August 17, 1990, for initial inspections. Repetitive inspections and overhauls follow specific intervals as outlined in the AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
All Model 747 series airplanes, certificated in any category.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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