AD 78-04-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-9-11 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 Series, C-9A, C-9B, and VC-9C |
| aircraft | The Boeing Company | DC-9-12 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 Series, C-9A, C-9B, and VC-9C |
| aircraft | The Boeing Company | DC-9-13 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 Series, C-9A, C-9B, and VC-9C |
| aircraft | The Boeing Company | DC-9-14 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 Series, C-9A, C-9B, and VC-9C |
| aircraft | The Boeing Company | DC-9-15 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 Series, C-9A, C-9B, and VC-9C |
| aircraft | The Boeing Company | DC-9-15F | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 Series, C-9A, C-9B, and VC-9C |
| aircraft | The Boeing Company | DC-9-21 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 Series, C-9A, C-9B, and VC-9C |
| aircraft | The Boeing Company | DC-9-31 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 Series, C-9A, C-9B, and VC-9C |
| aircraft | The Boeing Company | DC-9-32 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 Series, C-9A, C-9B, and VC-9C |
| aircraft | The Boeing Company | DC-9-32 (VC-9C) | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 Series, C-9A, C-9B, and VC-9C |
Unsafe Condition
The aileron/spoiler mixer cam may disengage from the cam roller, which could result in loss of control of the aileron/spoiler system.
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Required Actions
Within 275 hours time in service after the effective date, inspect and re-shim if required as specified in McDonnell Douglas DC-9 Alert Service Bulletin A27-189. Within 2000 hours time in service after the effective date, add washers as specified in the same service bulletin or an equivalent modification.
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Compliance Time
Within the next 275 hours time in service after the effective date of this AD for inspections and within the next 2000 hours time in service after the effective date for adding washers.
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Affected Aircraft
McDonnell Douglas Model DC-9 Series airplanes, including Military Type C-9A, C-9B, and VC-9C, with F/N's 1 through 862.
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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