AD 99-13-13
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-9-11 | Airworthiness Directives; McDonnell Douglas Model DC-9, DC-9-80, and C-9 (Military) Series Airplanes; Model MD-88 Airplanes; and Model MD-90 Airplanes |
| aircraft | The Boeing Company | DC-9-12 | Airworthiness Directives; McDonnell Douglas Model DC-9, DC-9-80, and C-9 (Military) Series Airplanes; Model MD-88 Airplanes; and Model MD-90 Airplanes |
| aircraft | The Boeing Company | DC-9-13 | Airworthiness Directives; McDonnell Douglas Model DC-9, DC-9-80, and C-9 (Military) Series Airplanes; Model MD-88 Airplanes; and Model MD-90 Airplanes |
| aircraft | The Boeing Company | DC-9-14 | Airworthiness Directives; McDonnell Douglas Model DC-9, DC-9-80, and C-9 (Military) Series Airplanes; Model MD-88 Airplanes; and Model MD-90 Airplanes |
| aircraft | The Boeing Company | DC-9-15 | Airworthiness Directives; McDonnell Douglas Model DC-9, DC-9-80, and C-9 (Military) Series Airplanes; Model MD-88 Airplanes; and Model MD-90 Airplanes |
| aircraft | The Boeing Company | DC-9-15F | Airworthiness Directives; McDonnell Douglas Model DC-9, DC-9-80, and C-9 (Military) Series Airplanes; Model MD-88 Airplanes; and Model MD-90 Airplanes |
| aircraft | The Boeing Company | DC-9-21 | Airworthiness Directives; McDonnell Douglas Model DC-9, DC-9-80, and C-9 (Military) Series Airplanes; Model MD-88 Airplanes; and Model MD-90 Airplanes |
| aircraft | The Boeing Company | DC-9-31 | Airworthiness Directives; McDonnell Douglas Model DC-9, DC-9-80, and C-9 (Military) Series Airplanes; Model MD-88 Airplanes; and Model MD-90 Airplanes |
| aircraft | The Boeing Company | DC-9-32 | Airworthiness Directives; McDonnell Douglas Model DC-9, DC-9-80, and C-9 (Military) Series Airplanes; Model MD-88 Airplanes; and Model MD-90 Airplanes |
| aircraft | The Boeing Company | DC-9-32 (VC-9C) | Airworthiness Directives; McDonnell Douglas Model DC-9, DC-9-80, and C-9 (Military) Series Airplanes; Model MD-88 Airplanes; and Model MD-90 Airplanes |
Unsafe Condition
Failure of the piston of the flight spoiler actuator and consequent puncturing of the aft spar web, which could result in fuel leakage and reduced structural integrity of the wings.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Conduct a one-time inspection of the forward attach pins of the outboard flight spoiler actuators to verify correct length. Perform follow-on corrective actions as specified, including installation of correct length pins and reidentification with P/N 4935329-503.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Before further flight
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
McDonnell Douglas Model DC-9, DC-9-80, C-9 (Military) series; Model MD-88 and MD-90 airplanes with piston assemblies P/N 4913415-505 or 4913415-507 installed in outboard flight spoiler actuators.
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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