AD 89-11-02 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-9-15F | Airworthiness Directives; McDONNELL DOUGLAS DC-9-15F, -32F, -33F, and -34F, including C-9A and C-9B (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-32F | Airworthiness Directives; McDONNELL DOUGLAS DC-9-15F, -32F, -33F, and -34F, including C-9A and C-9B (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-32F (C-9A) | Airworthiness Directives; McDONNELL DOUGLAS DC-9-15F, -32F, -33F, and -34F, including C-9A and C-9B (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-32F (C-9B) | Airworthiness Directives; McDONNELL DOUGLAS DC-9-15F, -32F, -33F, and -34F, including C-9A and C-9B (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-33F | Airworthiness Directives; McDONNELL DOUGLAS DC-9-15F, -32F, -33F, and -34F, including C-9A and C-9B (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-34F | Airworthiness Directives; McDONNELL DOUGLAS DC-9-15F, -32F, -33F, and -34F, including C-9A and C-9B (Military) Series Airplanes |
Unsafe Condition
Inadvertent opening of the main cargo door in flight could result in loss of pressurization and control of the aircraft.
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Required Actions
Within 14 days after May 30, 1989, ensure the main cargo door is closed, latched, and locked prior to takeoff. Conduct a main cargo door-open indicating system functional check within 30 days after May 30, 1989, and every 45 days thereafter. Install modifications including hydraulic isolation valve, door-open indicating circuit, viewing window, vent system, hinge pin retainer, and vent door indicating system within specified timeframes. Inspect and modify control panel access door, check hydraulic control valve shaft operation, and ensure correct exterior markings.
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Compliance Time
Within the next 14 days after May 30, 1989 (for paragraph A), 30 days after May 30, 1989 (for paragraphs B, C, D, E), six months (for paragraph F), one year (for paragraph G), and as specified for other paragraphs.
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Affected Aircraft
McDonnell Douglas DC-9-15F, -32F, -33F, -34F, including C-9A and C-9B (Military) series airplanes listed in specified service bulletins.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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