AD 99-14-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 777-200 Series | Airworthiness Directives; BOEING Model 777-200 Series Airplanes |
Unsafe Condition
Incorrect installation of fasteners on the trailing edges of the horizontal and vertical stabilizer without wet sealant could cause corrosion and possible cracking of aluminum ribs and brackets, leading to loss of elevator and rudder attachment and reduced controllability.
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Required Actions
Inspect specified fasteners on horizontal and vertical stabilizers to verify correct installation with wet sealant. Replace incorrectly installed fasteners with new ones installed with wet sealant, including oversizing holes and applying primer. Perform follow-on actions as necessary.
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Compliance Time
Within five years since the date of manufacture of the airplane.
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Affected Aircraft
Boeing Model 777-200 series airplanes, line numbers 15 through 33, excluding line number 18.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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