AD 69-26-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-9-11 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 Series Aircraft |
| aircraft | The Boeing Company | DC-9-12 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 Series Aircraft |
| aircraft | The Boeing Company | DC-9-13 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 Series Aircraft |
| aircraft | The Boeing Company | DC-9-14 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 Series Aircraft |
| aircraft | The Boeing Company | DC-9-15 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 Series Aircraft |
| aircraft | The Boeing Company | DC-9-15F | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 Series Aircraft |
| aircraft | The Boeing Company | DC-9-21 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 Series Aircraft |
| aircraft | The Boeing Company | DC-9-31 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 Series Aircraft |
| aircraft | The Boeing Company | DC-9-32 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 Series Aircraft |
| aircraft | The Boeing Company | DC-9-32 (VC-9C) | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 Series Aircraft |
Unsafe Condition
Heat damage to HF and V.H.F. coaxial cables and other wiring located in the tail compartment adjacent to the 8th stage bleed duct and APU exhaust shroud.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect or replace HF and V.H.F. coaxial cables for heat damage; provide clearance between cables and bleed duct; inspect and replace APU exhaust shroud if necessary; pressure test pneumatic duct installation; reroute cables and install insulation blankets as per Service Bulletins within specified timeframes.
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Compliance Time
Within the next 200 hours' time in service after the effective date of this AD for initial inspections and repairs, and within 2000 hours' time in service for the comprehensive modifications under section B.
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Affected Aircraft
McDonnell Douglas Model DC-9 Series aircraft including DC-9-11, DC-9-12, DC-9-13, DC-9-14, DC-9-15, DC-9-15F, DC-9-21, DC-9-31, DC-9-32, and others as listed.
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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