AD 92-02-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-9-11 | Airworthiness Directives; McDONNELL DOUGLAS DC-9, DC-9-80 Series Airplanes, MD-88 Airplanes, and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-12 | Airworthiness Directives; McDONNELL DOUGLAS DC-9, DC-9-80 Series Airplanes, MD-88 Airplanes, and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-13 | Airworthiness Directives; McDONNELL DOUGLAS DC-9, DC-9-80 Series Airplanes, MD-88 Airplanes, and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-14 | Airworthiness Directives; McDONNELL DOUGLAS DC-9, DC-9-80 Series Airplanes, MD-88 Airplanes, and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-15 | Airworthiness Directives; McDONNELL DOUGLAS DC-9, DC-9-80 Series Airplanes, MD-88 Airplanes, and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-15F | Airworthiness Directives; McDONNELL DOUGLAS DC-9, DC-9-80 Series Airplanes, MD-88 Airplanes, and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-21 | Airworthiness Directives; McDONNELL DOUGLAS DC-9, DC-9-80 Series Airplanes, MD-88 Airplanes, and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-31 | Airworthiness Directives; McDONNELL DOUGLAS DC-9, DC-9-80 Series Airplanes, MD-88 Airplanes, and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-32 | Airworthiness Directives; McDONNELL DOUGLAS DC-9, DC-9-80 Series Airplanes, MD-88 Airplanes, and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-32 (VC-9C) | Airworthiness Directives; McDONNELL DOUGLAS DC-9, DC-9-80 Series Airplanes, MD-88 Airplanes, and C-9 (Military) Series Airplanes |
Unsafe Condition
Uncontrolled airplane sideslip due to an ineffective rudder actuator caused by internal hydraulic fluid leakage.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the rudder actuator for internal hydraulic fluid leakage in accordance with specified service bulletins. Repeat inspections at intervals not exceeding 1,500 or 3,000 flight hours depending on model. Replace the rudder actuator if leakage exceeds limits before further flight. Modify the rudder actuator within 10,000 flight hours after AD effective date per Service Bulletin 27-301.
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Compliance Time
Within specified flight hours after April 12, 1989 or AD effective date, depending on model. The modification must be done within 10,000 flight hours after AD effective date.
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Affected Aircraft
McDonnell Douglas DC-9 series, DC-9-80 series, MD-88, and C-9 (Military) series airplanes with serial numbers listed in Service Bulletin 27-301, Revision 1.
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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