AD 2021-12-13
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Boeing | Company | Airworthiness Directives; The Boeing Company Airplanes |
Unsafe Condition
During refueling of the right main tank, if there is a failure of the automatic shutoff system, the refueling panel does not provide the required flashing indication that the automatic shutoff has failed to shut off the fuel.
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Required Actions
Installing a new fuel quantity processor unit (FQPU) and doing an FQPU software check, as specified in Boeing Special Attention Requirements Bulletin 737-28-1363 RB, dated June 2, 2020.
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Compliance Time
Within the compliance times specified in the "Compliance" paragraph of Boeing Special Attention Requirements Bulletin 737-28-1363 RB, dated June 2, 2020.
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Affected Aircraft
The Boeing Company Model 737-8 and 737-9 airplanes, certificated in any category, as identified in Boeing Special Attention Requirements Bulletin 737-28-1363 RB, dated June 2, 2020.
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Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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