AD 90-01-09
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
Engine shutdown or damage, and/or pneumatic system damage due to failure of the Allied Signal 8th stage bleed system check valve, part number 3202164-2 or -4.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Within 250 hours time-in-service after the effective date or prior to 600 hours total time-in-service on the valve, inspect the check valve per Boeing Alert Service Bulletin 767-36A0030. Repair or replace non-conforming valves before further flight. Used valves must be inspected and repaired per the same service bulletin before installation. Installing P/N 320544-1 valve terminates the inspection requirement.
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Compliance Time
Within the next 250 hours time-in-service after the effective date of this AD, or prior to accumulating 600 hours total time-in-service on the valve, whichever occurs later
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Affected Aircraft
All Model 767 series airplanes equipped with Allied Signal 8th stage bleed system check valve, part number 3202164-2 or -4.
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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