AD 99-21-21
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus | A300 B4-605R | Airworthiness Directives; Airbus Model A310-300 and A300-600R Series Airplanes |
| aircraft | Airbus | A300 B4-622R | Airworthiness Directives; Airbus Model A310-300 and A300-600R Series Airplanes |
| aircraft | Airbus | A300 F4-605R | Airworthiness Directives; Airbus Model A310-300 and A300-600R Series Airplanes |
| aircraft | Airbus | A300 F4-622R | Airworthiness Directives; Airbus Model A310-300 and A300-600R Series Airplanes |
| aircraft | Airbus | A310-304 | Airworthiness Directives; Airbus Model A310-300 and A300-600R Series Airplanes |
| aircraft | Airbus | A310-322 | Airworthiness Directives; Airbus Model A310-300 and A300-600R Series Airplanes |
| aircraft | Airbus | A310-324 | Airworthiness Directives; Airbus Model A310-300 and A300-600R Series Airplanes |
| aircraft | Airbus | A310-325 | Airworthiness Directives; Airbus Model A310-300 and A300-600R Series Airplanes |
Unsafe Condition
Fuel leakage from the seal of the water scavenge pumps could result in fuel leakage into fuselage areas not designed for fuel, potentially contacting a fuel ignition source.
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Required Actions
Install a new cover assembly, associated new drain and vent pipework, and a new electrical harness on the trimmable horizontal stabilizer for the fuel tank water scavenge motive pump. Actions must be accomplished within 18 months after the effective date for airplanes with pre-existing installations, and simultaneously with Modification 8679 for post-effective date installations.
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Compliance Time
Within 18 months after the effective date (November 17, 1999) for pre-existing installations
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Affected Aircraft
Airbus Model A310-300 and A300-600R series airplanes, excluding those with accomplished Modification 10003 per specified service bulletins.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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