AD 91-10-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 767-200 Series | Airworthiness Directives; BOEING Model 767 Series Airplanes |
| aircraft | The Boeing Company | 767-300 Series | Airworthiness Directives; BOEING Model 767 Series Airplanes |
| aircraft | The Boeing Company | 767-300F Series | Airworthiness Directives; BOEING Model 767 Series Airplanes |
Unsafe Condition
Structural failure of the vertical stabilizer from overpressurization in the event of a rupture of the fuselage under the dorsal fin.
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Required Actions
Install a cover plate and a panel assembly over the lightening and access holes in the vertical stabilizer forward closure rib in accordance with Boeing Alert Service Bulletin 767-55A0007 or Revision 1. An alternative method of compliance may be used if approved by the Manager, Seattle Aircraft Certification Office.
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Compliance Time
Within the next 18 months after the effective date of this amendment
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Affected Aircraft
BOEING Model 767 series airplanes, line number 300 through 307, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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