AD 89-14-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 757-200 Series | BOEING Model 757 and 767 Series Airplanes |
| aircraft | The Boeing Company | 757-200CB Series | BOEING Model 757 and 767 Series Airplanes |
| aircraft | The Boeing Company | 757-200PF Series | BOEING Model 757 and 767 Series Airplanes |
| aircraft | The Boeing Company | 757-300 Series | BOEING Model 757 and 767 Series Airplanes |
| aircraft | The Boeing Company | 767-200 Series | BOEING Model 757 and 767 Series Airplanes |
| aircraft | The Boeing Company | 767-300 Series | BOEING Model 757 and 767 Series Airplanes |
| aircraft | The Boeing Company | 767-300F Series | BOEING Model 757 and 767 Series Airplanes |
Unsafe Condition
Freezing of motor-driven fuel valve actuators caused by moisture ingress around corroded mating joint seals.
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Required Actions
Visually inspect fuel valve actuators for aluminum oxide corrosion residue on screw heads and joining surfaces; replace corroded actuators with serviceable parts or exchange with non-corroded actuators from defuel valve positions. Within one year, replace all fuel valve actuators with modified versions per specified service bulletins.
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Compliance Time
Within the next 60 days after the effective date of this AD for inspections; within one year after the effective date for replacing with modified valve actuators.
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Affected Aircraft
Boeing Model 757 and 767 series airplanes identified in Boeing Alert Service Bulletins 757-28A0018 and 767-28A0020, dated September 15, 1988.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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