AD 88-25-51 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-9-81 (MD-81) | Airworthiness Directives; McDONNELL DOUGLAS DC-9-81, -82, -83, -87, and MD-88 Series Airplanes |
| aircraft | The Boeing Company | DC-9-82 (MD-82) | Airworthiness Directives; McDONNELL DOUGLAS DC-9-81, -82, -83, -87, and MD-88 Series Airplanes |
| aircraft | The Boeing Company | DC-9-83 (MD-83) | Airworthiness Directives; McDONNELL DOUGLAS DC-9-81, -82, -83, -87, and MD-88 Series Airplanes |
| aircraft | The Boeing Company | DC-9-87 (MD-87) | Airworthiness Directives; McDONNELL DOUGLAS DC-9-81, -82, -83, -87, and MD-88 Series Airplanes |
| aircraft | The Boeing Company | MD-88 | Airworthiness Directives; McDONNELL DOUGLAS DC-9-81, -82, -83, -87, and MD-88 Series Airplanes |
Unsafe Condition
The horizontal stabilizer takeoff position indicator assembly may have loose bonding of the center of gravity and flap indicator dials, leading to incorrect longitudinal trim display during takeoff configuration checks.
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Required Actions
Within 5 calendar days after the effective date and daily thereafter, perform a functional test of the horizontal stabilizer takeoff position indicator assembly. Within 25 calendar days after the effective date and every 25 days thereafter, check the adhesive bond strength of the indicator dials and perform adjustment/test. Replace the assembly prior to further flight if bonding is loose or adjustments fail.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Required as indicated, unless previously accomplished.
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Affected Aircraft
McDonnell Douglas Model DC-9-81, -82, -83, -87, and MD-88 series airplanes, certificated in any category.
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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