AD 86-04-08
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 767-200 Series | BOEING Model 767 Series Airplanes |
| aircraft | The Boeing Company | 767-300 Series | BOEING Model 767 Series Airplanes |
| aircraft | The Boeing Company | 767-300F Series | BOEING Model 767 Series Airplanes |
Unsafe Condition
Failure of the counterbalance gearbox assembly could result in improper entry/service door operation during emergency evacuation.
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Required Actions
Modify the counterbalance gearbox assemblies in accordance with Boeing Service Bulletin 767-52-0029 or later FAA-approved revisions. An alternate means of compliance may be used if approved by the Manager, Seattle Aircraft Certification Office.
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Compliance Time
within nine months after the effective date of this AD
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Affected Aircraft
Boeing Model 767-200 Series, 767-300 Series, 767-300F Series airplanes as specified in Boeing Service Bulletin 767-52-0029 dated August 2, 1985.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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