AD 2001-03-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 747-100 | Airworthiness Directives; Boeing Model 747-100, -200, -300, -400, and 747SR Series Airplanes |
Unsafe Condition
Installation of H-11 steel bolts as attach and support bolts at the trailing edge flap transmissions, which could lead to loss of a flap transmission and reduce lateral controllability of the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect all airplanes to determine whether H-11 steel bolts are installed as attach and support bolts at the trailing edge flap transmissions. Replace any H-11 steel bolt with an Inconel bolt. Operators of airplanes with line number (L/N) 872 and subsequent may inspect maintenance records instead of performing the physical inspection, provided no major repair or replacement of a flap transmission or flap track has been done.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 18 months of the effective date (March 28, 2001).
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
All Boeing Model 747-100, -200, -300, -400, and 747SR series airplanes.
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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