AD 91-12-15
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 757-200 Series | Airworthiness Directives; BOEING Model 757 Series Airplanes |
| aircraft | The Boeing Company | 757-200CB Series | Airworthiness Directives; BOEING Model 757 Series Airplanes |
| aircraft | The Boeing Company | 757-200PF Series | Airworthiness Directives; BOEING Model 757 Series Airplanes |
| aircraft | The Boeing Company | 757-300 Series | Airworthiness Directives; BOEING Model 757 Series Airplanes |
Unsafe Condition
Loss of fluid from all three hydraulic systems due to unincorporated Production Revision Release (PRR) 53736.
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Required Actions
Modify the center hydraulic system per Boeing Alert Service Bulletin 757-29A0030, Revision 3. Alternative methods of compliance or adjustments may be approved by the Manager, Seattle Aircraft Certification Office. Special flight permits may be issued under FAR 21.197 and 21.199.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 3,600 hours time-in-service or 24 calendar months after the effective date of this AD, whichever occurs later
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Affected Aircraft
BOEING Model 757 series airplanes, line numbers 001 through 199, on which Production Revision Release (PRR) 53736 has not been incorporated
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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