AD 90-18-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 767-200 Series | Airworthiness Directives; BOEING Model 767-200 and -300 Series Airplanes |
| aircraft | The Boeing Company | 767-300 Series | Airworthiness Directives; BOEING Model 767-200 and -300 Series Airplanes |
Unsafe Condition
Loss of stabilizer trim and decreased pitch control authority.
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Required Actions
Install the hydraulic power transfer unit system with its associated components in accordance with Boeing Alert Service Bulletin 767-29A0039, Revision 1, dated November 2, 1989, or an approved procedure. Alternate means of compliance may be used if approved by the FAA.
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Compliance Time
within 18 months after the effective date of this AD
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Affected Aircraft
All Model 767-200 and -300 series airplanes on which Production Revision Record (PRR) B-11777 has not been incorporated.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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