AD 93-14-11
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
Failure of the engine bleed air crossover ducts, which could result in loss of pneumatics and damage to adjacent structure.
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Required Actions
Conduct a dye penetrant inspection and proof pressure test of the crossover pneumatic ducts within specified compliance times. If cracks or ruptures are detected, repair or replace the ducts prior to further flight. Stress relieving may be done during initial inspection and test, and additional inspections are required after 3,000 flight cycles. Alternatively, replace all ducts with stress relieved ones per the service bulletin.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 6 months after the effective date (September 16, 1993) or prior to 7,000 total flight cycles, whichever occurs later (Option 1). For Option 2, within 18 months after the effective date or prior to 7,000 total flight cycles, whichever occurs later.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Boeing Model 767 series airplanes, line position 001 through 307, inclusive; certificated in any category.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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