AD 2000-20-20
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 747-400 | Airworthiness Directives; Boeing Model 747-400 Series Airplanes |
Unsafe Condition
Failure of multiple inertial reference units (IRU) in flight, which could result in the loss of navigation data during flight, compromising the ability of the flight crew to maintain the safe flight and landing of the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove existing inertial reference units (IRU) and install modified IRU's.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 18 months of the effective date (November 22, 2000).
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Boeing Model 747-400 series airplanes with specific line numbers as defined in the AD.
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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