AD 91-10-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-9-81 (MD-81) | Airworthiness Directives; McDONNELL DOUGLAS DC-9-80 (MD-80) Series Airplanes and Model MD-88 Airplanes |
| aircraft | The Boeing Company | DC-9-82 (MD-82) | Airworthiness Directives; McDONNELL DOUGLAS DC-9-80 (MD-80) Series Airplanes and Model MD-88 Airplanes |
| aircraft | The Boeing Company | DC-9-83 (MD-83) | Airworthiness Directives; McDONNELL DOUGLAS DC-9-80 (MD-80) Series Airplanes and Model MD-88 Airplanes |
| aircraft | The Boeing Company | DC-9-87 (MD-87) | Airworthiness Directives; McDONNELL DOUGLAS DC-9-80 (MD-80) Series Airplanes and Model MD-88 Airplanes |
| aircraft | The Boeing Company | MD-88 | Airworthiness Directives; McDONNELL DOUGLAS DC-9-80 (MD-80) Series Airplanes and Model MD-88 Airplanes |
Unsafe Condition
Degradation of airplane flight handling qualities due to loose or missing bolts and nuts attaching the elevator variable load feel torque tube to the elevator variable load feel mechanism.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the four bolts attaching the elevator variable load feel torque tube to the mechanism for loose or missing bolts and nuts within 14 days after October 5, 1990, and every 60 days thereafter. Correct discrepancies before further flight. Replace three self-locking bolts/nuts and one non-locking bolt with castellated nut/bolts and a drilled head bolt within 6 months after June 18, 1991.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 14 days after October 5, 1990 (for initial inspection), every 60 days thereafter (for subsequent inspections), and within 6 months after June 18, 1991 (for modification).
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
McDonnell Douglas DC-9-80 (MD-80) series airplanes (DC-9-81, DC-9-82, DC-9-83, DC-9-87, MD-88) with serial numbers listed in McDonnell Douglas Service Bulletin A27-313 dated August 3, 1990.
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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