AD 99-16-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 747-400 Series | Airworthiness Directives; BOEING Model 747-400 Series Airplanes |
| aircraft | The Boeing Company | 747-400D Series | Airworthiness Directives; BOEING Model 747-400 Series Airplanes |
| aircraft | The Boeing Company | 747-400F Series | Airworthiness Directives; BOEING Model 747-400 Series Airplanes |
Unsafe Condition
Disbonding of the doubler on the upper rudder pedal cover could result in restricted rudder pedal movement and reduced controllability of the airplane.
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Required Actions
Perform an inspection of the doubler on the upper rudder pedal cover within 500 flight hours after the effective date to determine secure attachment. If not securely attached, remove the doubler and perform corrective action within 10 operating days, such as bonding a new doubler or replacing the upper rudder cover assembly with a modified version. Installation of two rivets as optional terminating action for repetitive inspections.
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Compliance Time
Within 500 flight hours after the effective date
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Affected Aircraft
Boeing Model 747-400 series airplanes listed in Boeing Alert Service Bulletin 747-27A2378, including 747-400D and 747-400F series.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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