Airworthiness Directives (ADs)
87-747-289
The aircraft owner or operator shall comply with Airworthiness Directives issued by the CAA or the aeronautics authority of the State of Design (SoD) of the aviation products, appliances and parts, and take all necessary actions thereto.
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Issue Date
- 1998/12/09
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Applicability
- 747
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Model Number
- 747
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CAA AD Number
- 87-747-289
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Aeronautics Authority of Original AD
- FAA
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Original AD Number
- T98-25-52
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Effective Date
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Subject
- To prevent contact between the rotating paddle wheel and the stationary end plates within the center wing tank override/jettison fuel pumps or horizontal stabilizer tank transfer pumps due to excessive wear of the pump shaft carbon thrust bearing, which can cause sparks and/or a hot surface condition and consequent ignition of fuel vapor in the center wing tank or horizontal stabilizer thank during dry pump operation.
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Reference Publications (Revision/ATA/SB)
- AD 98-25-52, M-7200-98-04527, -04384
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Remarks
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Download
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