AD 86-17-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 757-200 Series | BOEING Model 757-200 Series Airplanes |
Unsafe Condition
Self-locking nuts (P/N BACN10JC12CM or BACN10JC12CD) installed on the nose gear door actuator attachment, main landing gear jury brace support attachment, main landing gear forward trunnion drag fitting aft attachment, and P&W 2037 engine front evener bar attachment may have insufficient self-locking torque characteristics.
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Required Actions
Within 90 days after the effective date (September 5, 1986), check Category II self-locking nuts for proper self-locking torque per Boeing Service Letter 757-SL-27-24-B. Replace non-compliant nuts prior to further flight with ones meeting torque criteria. Alternate compliance may be approved by the FAA Manager, Seattle Aircraft Certification Office.
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Compliance Time
Within the next 90 days after the effective date of this AD
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Affected Aircraft
All Model 757-200 series airplanes listed in Boeing Service Letter 757-SL-27-24-B, dated June 2, 1986.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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