AD 91-15-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 767-200 Series | Airworthiness Directives; BOEING Model 767-200 and 767-300 Series Airplanes |
| aircraft | The Boeing Company | 767-300 Series | Airworthiness Directives; BOEING Model 767-200 and 767-300 Series Airplanes |
Unsafe Condition
A broken pumping unit diffuser ring during dry pump operation could create a potential ignition source in the center wing tanks.
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Required Actions
Inspect center wing tank pumping units part number 5006286 within 30 days after June 30, 1991. If brazed joints are discrepant, repair or replace the diffuser assembly before reinstallation. Alternatively, deactivate the center wing fuel tank per Boeing Alert Service Bulletin 767-28A0036. Submit a report within 45 days of the AD's effective date.
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Compliance Time
Within the next 30 days after June 30, 1991 (the effective date of Amendment 39-7005) and within 30 days after the effective date of this AD (August 2, 1991).
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Affected Aircraft
Boeing Model 767-200 and 767-300 series airplanes listed in Boeing Alert Service Bulletin 767-28A0036 dated May 3, 1991.
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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