AD 84-22-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-9-11 | Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, -50, and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-12 | Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, -50, and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-13 | Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, -50, and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-14 | Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, -50, and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-15 | Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, -50, and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-15F | Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, -50, and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-21 | Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, -50, and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-31 | Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, -50, and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-32 | Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, -50, and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-32 (VC-9C) | Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, -50, and C-9 (Military) Series Airplanes |
Unsafe Condition
Cracked wing flap outboard hinge lower stud(s) due to hydrogen embrittlement, which could lead to failure of the wing hinge bracket.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Ultrasonically inspect flap hinge fitting lower studs for cracking per McDonnell Douglas DC-9 Alert Service Bulletin A57-162 or FAA-approved revisions. If cracking is found, replace all four studs as per the service bulletin. Alternative methods providing equivalent safety may be used with FAA approval.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Prior to the accumulation of 10,400 landings or within 400 landings, whichever occurs later, from the effective date of this AD.
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Affected Aircraft
McDonnell Douglas Model DC-9-10, -20, -30, -40, -50, and C-9 (Military) series airplanes modified with Service Bulletin 57-118 or production equivalent.
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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