AD 79-03-01 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-9-11 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, -50 Series Airplanes, C-9A, C9B, and VC-9C |
| aircraft | The Boeing Company | DC-9-12 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, -50 Series Airplanes, C-9A, C9B, and VC-9C |
| aircraft | The Boeing Company | DC-9-13 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, -50 Series Airplanes, C-9A, C9B, and VC-9C |
| aircraft | The Boeing Company | DC-9-14 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, -50 Series Airplanes, C-9A, C9B, and VC-9C |
| aircraft | The Boeing Company | DC-9-15 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, -50 Series Airplanes, C-9A, C9B, and VC-9C |
| aircraft | The Boeing Company | DC-9-15F | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, -50 Series Airplanes, C-9A, C9B, and VC-9C |
| aircraft | The Boeing Company | DC-9-21 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, -50 Series Airplanes, C-9A, C9B, and VC-9C |
| aircraft | The Boeing Company | DC-9-31 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, -50 Series Airplanes, C-9A, C9B, and VC-9C |
| aircraft | The Boeing Company | DC-9-32 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, -50 Series Airplanes, C-9A, C9B, and VC-9C |
| aircraft | The Boeing Company | DC-9-32 (VC-9C) | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, -50 Series Airplanes, C-9A, C9B, and VC-9C |
Unsafe Condition
Fatigue cracks and/or failure of the wing flap outboard idler hinge support fitting attachment studs.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Accomplish an ultrasonic inspection within the next 850 landings after the effective date or before accumulating 10,000 total landings, whichever occurs later. If studs are cracked, failed, or have accumulated 50,000 or more landings, replace all four studs, two PLI washers, and applicable attaching parts with new original design or upgraded components per Service Bulletin 57-118. Adjust inspection intervals may be permitted with FAA approval.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 850 landings after the effective date of this AD, or before accumulating 10,000 total landings, whichever occurs later, unless already accomplished within the last 2,550 landings, and thereafter at intervals of 3,400 landings from the last inspection.
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, -50 Series Airplanes, including C-9A, C9B, and VC-9C military variants, fuselage numbers F/N 1 through F/N 880 corresponding to factory serial numbers listed in Service Bulletin 57-118.
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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