AD 2000-15-17
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | McDonnell Douglas | Various | Airworthiness Directives; McDonnell Douglas Model DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD-83), and DC-9-87 (MD-87); Model MD-88 Airplanes; and Model MD-90-30 Series Airplanes |
Unsafe Condition
Fatigue vibration and cracking in the flared radius of a hydraulic pipe in the aft fuselage, leading to hydraulic fluid leakage into the auxiliary power unit (APU) inlet and subsequently into the air conditioning system, causing smoke and odors in the passenger cabin or cockpit.
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Required Actions
Install a pipe support and clamps on the hydraulic lines in the aft fuselage; replace the hydraulic pipe assembly in the aft fuselage with a new pipe assembly; install drain tube assemblies and diverter assemblies in the area of the APU inlet, as applicable.
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Compliance Time
Within 36 months of the effective date.
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Affected Aircraft
McDonnell Douglas Model DC-9-81 (MD-81), DC-9-82 (MD-82), DC-9-83 (MD-83), and DC-9-87 (MD-87); Model MD-88 airplanes; and Model MD-90-30 series airplanes.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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