AD 88-24-04 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-9-11 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9, C-9 (Military), DC-9-80 (MD-80) Series Airplanes, and Model MD-88 Airplanes |
| aircraft | The Boeing Company | DC-9-12 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9, C-9 (Military), DC-9-80 (MD-80) Series Airplanes, and Model MD-88 Airplanes |
| aircraft | The Boeing Company | DC-9-13 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9, C-9 (Military), DC-9-80 (MD-80) Series Airplanes, and Model MD-88 Airplanes |
| aircraft | The Boeing Company | DC-9-14 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9, C-9 (Military), DC-9-80 (MD-80) Series Airplanes, and Model MD-88 Airplanes |
| aircraft | The Boeing Company | DC-9-15 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9, C-9 (Military), DC-9-80 (MD-80) Series Airplanes, and Model MD-88 Airplanes |
| aircraft | The Boeing Company | DC-9-15F | Airworthiness Directives; MCDONNELL DOUGLAS DC-9, C-9 (Military), DC-9-80 (MD-80) Series Airplanes, and Model MD-88 Airplanes |
| aircraft | The Boeing Company | DC-9-21 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9, C-9 (Military), DC-9-80 (MD-80) Series Airplanes, and Model MD-88 Airplanes |
| aircraft | The Boeing Company | DC-9-31 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9, C-9 (Military), DC-9-80 (MD-80) Series Airplanes, and Model MD-88 Airplanes |
| aircraft | The Boeing Company | DC-9-32 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9, C-9 (Military), DC-9-80 (MD-80) Series Airplanes, and Model MD-88 Airplanes |
| aircraft | The Boeing Company | DC-9-32 (VC-9C) | Airworthiness Directives; MCDONNELL DOUGLAS DC-9, C-9 (Military), DC-9-80 (MD-80) Series Airplanes, and Model MD-88 Airplanes |
Unsafe Condition
Fire in the aft accessory compartment due to fuel on the APU exhaust ducting and surrounding area, including insulation blankets.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Check for fuel on APU exhaust ducting and surrounding area, remove any fuel before next APU start. Install placard on/in aircraft logbook and center instrument panel. Add AFM limitation. Inspect/modify/repair APU exhaust duct per SB A49-40 Rev 1 within 36 months. Trim APU frame and modify insulation per SB 53-229 within 36 months. Alternate compliance allowed with FAA approval.
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Compliance Time
Within 30 days or 300 flight hours time-in-service after December 2, 1988, whichever occurs first, or upon accumulation of 3,000 flight hours time-in-service since new, whichever occurs later. For paragraphs B and C: within 36 months from the effective date of this amendment (March 19, 1990).
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Affected Aircraft
McDonnell Douglas Model DC-9, C-9 (Military), DC-9-80 (MD-80) series, and Model MD-88 airplanes, certificated in any category.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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