AD 86-20-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 707-300 Series | BOEING Model 707-300 Series Airplanes |
| aircraft | The Boeing Company | 707-300B Series | BOEING Model 707-300 Series Airplanes |
| aircraft | The Boeing Company | 707-300C Series | BOEING Model 707-300 Series Airplanes |
Unsafe Condition
Loss of engine core cowl door due to failure of the pylon support brackets and cowl door attachment hardware.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Modify core cowl doors and pylon support brackets per Tracor Aviation Alert Service Bulletins AQ707-71-006, AQ707-71-012, AQ707-71-013 and Service Bulletins Q707-71-007, Q707-71-009, Q707-71-010, or later FAA-approved revisions. Alternate means of compliance may be used if approved by the FAA.
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Compliance Time
within 150 hours time in service or within 30 days, whichever occurs earlier after the effective date of this AD
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Affected Aircraft
Boeing Model 707-300 Series airplanes modified with Supplemental Type Certificate SA2699NM
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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