AD 68-10-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 727-100 Series | BOEING Model 727 Series |
| aircraft | The Boeing Company | 727-100C Series | BOEING Model 727 Series |
| aircraft | The Boeing Company | 727-200 Series | BOEING Model 727 Series |
| aircraft | The Boeing Company | 727-200F Series | BOEING Model 727 Series |
| aircraft | The Boeing Company | 727 Series | BOEING Model 727 Series |
| aircraft | The Boeing Company | 727C Series | BOEING Model 727 Series |
Unsafe Condition
Failure of the thrust reverser deflector doors could result in uncommanded thrust reverser operation or structural failure of the doors during flight.
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Required Actions
Modify the thrust reverser deflector doors according to Boeing Service Bulletin No. 78-51, Revision 1, or later FAA-approved revision. Additionally, within 800 hours time in service after the effective date, modify the doors using Boeing Service Letter 6-7132-3375. Replace bolt P/N BAC-B30EK8-48 or P/N BAC-B30EK8-48C within 3,500 hours time in service after the initial modifications and every 3,500 hours thereafter.
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Compliance Time
Within 1600 hours time in service after the effective date of this AD unless already accomplished, and within 800 hours time in service after the effective date for the second modification. The bolt replacement must be done within 3,500 hours time in service after accomplishing the modifications and thereafter at intervals not to exceed 3,500 hours time in service.
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Affected Aircraft
The Boeing Company Model 727 Series airplanes including 727-100, 727-100C, 727-200, 727-200F, 727 Series, and 727C Series.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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