AD 81-19-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-9-81 (MD-81) | Airworthiness Directives; McDONNELL DOUGLAS DC-9-80 Series Airplanes |
| aircraft | The Boeing Company | DC-9-82 (MD-82) | Airworthiness Directives; McDONNELL DOUGLAS DC-9-80 Series Airplanes |
| aircraft | The Boeing Company | DC-9-83 (MD-83) | Airworthiness Directives; McDONNELL DOUGLAS DC-9-80 Series Airplanes |
| aircraft | The Boeing Company | DC-9-87 (MD-87) | Airworthiness Directives; McDONNELL DOUGLAS DC-9-80 Series Airplanes |
Unsafe Condition
Separation of the thrust reverser from the airplane due to failure of the brazed joint at the thrust reverser attach flange.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Conduct a visual inspection with a 3-5 power magnifying glass of the exhaust nozzle barrel assembly exterior skin P/N 5938033-5 at attach flange P/N 5938033-37 joint for buckling, obvious separation, or circumferential cracks. Inspect thrust reversers to identify barrel serial numbers listed in the AD and remove those with specified serial numbers. Modify all P/N 5938033-1 reverser barrel assemblies by welding the engine attach flange-outer barrel skin joint per Service Bulletin 78-51, then reidentify the parts as P/N 5938033-501 and 5938050-501.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within three days from the effective date of this AD, and at intervals of 24 hours calendar time thereafter for inspections; within 120 days from the effective date for modifications.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
McDonnell Douglas Model DC-9-80 series airplanes (DC-9-81, DC-9-82, DC-9-83, DC-9-87) with thrust reverser barrel assemblies P/N 5938033-1 installed.
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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