AD 2000-02-33
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | 747-400 | Airworthiness Directives; Boeing Model 747-400 Series Airplanes Equipped With General Electric CF6-80C2 Series Engines |
| engine | General Electric | CF6-80C2 Series | Airworthiness Directives; Boeing Model 747-400 Series Airplanes Equipped With General Electric CF6-80C2 Series Engines |
Unsafe Condition
Low holding torque of the center drive unit (CDU) cone brake may lead to possible failure modes in the thrust reverser control system, resulting in inadvertent deployment of a thrust reverser during flight.
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Required Actions
Inspect and functionally test the thrust reverser control and indication system to detect discrepancies. Correct any discrepancies found to ensure the integrity of the fail-safe features of the thrust reverser system.
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Compliance Time
Before further flight
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Affected Aircraft
Boeing Model 747-400 series airplanes equipped with General Electric CF6-80C2 series engines.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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