AD 75-14-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-9-11 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, C-9A, C-9B, and VC-9C Series Airplanes |
| aircraft | The Boeing Company | DC-9-12 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, C-9A, C-9B, and VC-9C Series Airplanes |
| aircraft | The Boeing Company | DC-9-13 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, C-9A, C-9B, and VC-9C Series Airplanes |
| aircraft | The Boeing Company | DC-9-14 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, C-9A, C-9B, and VC-9C Series Airplanes |
| aircraft | The Boeing Company | DC-9-15 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, C-9A, C-9B, and VC-9C Series Airplanes |
| aircraft | The Boeing Company | DC-9-15F | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, C-9A, C-9B, and VC-9C Series Airplanes |
| aircraft | The Boeing Company | DC-9-21 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, C-9A, C-9B, and VC-9C Series Airplanes |
| aircraft | The Boeing Company | DC-9-31 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, C-9A, C-9B, and VC-9C Series Airplanes |
| aircraft | The Boeing Company | DC-9-32 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, C-9A, C-9B, and VC-9C Series Airplanes |
| aircraft | The Boeing Company | DC-9-32 (VC-9C) | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, C-9A, C-9B, and VC-9C Series Airplanes |
Unsafe Condition
Unwanted deployment of the engine reverser doors due to failed upper or lower driver links, which may extend beyond specified limits or exhibit separation, corrosion, cracks, or undercutting.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect or check upper and lower thrust reverser door fairings daily to verify alignment. Replace failed upper driver links prior to further flight if the upper door extends more than one-quarter inch higher than the fixed fairing. Inspect lower door driver links for separation and replace failed links or deactivate the reverser door. Perform dye penetrant inspections on all thrust reverser driver links (P/N 5958782-1 and/or 5958782-501) within 1600 flight hours or six months, whichever comes first. Check proper rigging and follow subsequent dye penetrant inspections every 800 cycles. Links must meet flange thickness and corrosion/crack criteria per Service Bulletin 78-36. Unserviceable links must be scrapped.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 72 hours after the effective date of this AD for daily inspections, and within 1600 additional hours of flight operation or six months after the effective date, whichever occurs first, for dye penetrant inspections. Subsequent inspections must be performed every 800 cycles in service.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
MCDONNELL DOUGLAS DC-9-10, -20, -30, -40 Series, and Military C-9A, C-9B, and VC-9C Series airplanes, manufacturer's fuselage numbers 1 through 765.
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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