AD 2001-22-17
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | McDonnell Douglas | DC-9-81 | Airworthiness Directives; McDonnell Douglas Model DC-9-81, -9-82, -9-83, and -9-87 Series Airplanes; Model MD-88 Airplanes; and Model MD-90-30 Series Airplanes |
Unsafe Condition
Various failures of the electric motor(s) of the auxiliary hydraulic pump and associated wiring, which could result in fire at the auxiliary hydraulic pump and consequent damage to the adjacent electrical equipment and/or structure.
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Required Actions
Inspect the electric motor(s) of the auxiliary hydraulic pump for electrical resistance, continuity, mechanical rotation, and associated wiring resistance/voltage. Perform corrective actions if necessary. Repeat inspections every 5,600 flight hours.
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Compliance Time
Within 12 months of the effective date, or within one repetitive interval since the last inspection if already performed.
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Affected Aircraft
McDonnell Douglas Model DC-9-81, -9-82, -9-83, and -9-87 series airplanes; Model MD-88 airplanes; and Model MD-90-30 series airplanes, as listed in specific service bulletins.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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