AD 89-08-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-9-11 | Airworthiness Directives; McDONNELL DOUGLAS DC-9, DC-9-80, and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-12 | Airworthiness Directives; McDONNELL DOUGLAS DC-9, DC-9-80, and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-13 | Airworthiness Directives; McDONNELL DOUGLAS DC-9, DC-9-80, and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-14 | Airworthiness Directives; McDONNELL DOUGLAS DC-9, DC-9-80, and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-15 | Airworthiness Directives; McDONNELL DOUGLAS DC-9, DC-9-80, and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-15F | Airworthiness Directives; McDONNELL DOUGLAS DC-9, DC-9-80, and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-21 | Airworthiness Directives; McDONNELL DOUGLAS DC-9, DC-9-80, and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-31 | Airworthiness Directives; McDONNELL DOUGLAS DC-9, DC-9-80, and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-32 | Airworthiness Directives; McDONNELL DOUGLAS DC-9, DC-9-80, and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-32 (VC-9C) | Airworthiness Directives; McDONNELL DOUGLAS DC-9, DC-9-80, and C-9 (Military) Series Airplanes |
Unsafe Condition
Lateral control difficulties after liftoff during takeoff due to the absence of the Spoiler Position Sensing and Indication System and 'spoiler deployed' annunciation takeoff inhibit feature.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install the Spoiler Position Sensing and Indication System and 'spoiler deployed' annunciation takeoff inhibit feature per Service Bulletins 27-173 and 27-257. For DC-9-81, -82, -83 models, install or reactivate the spoiler deployed annunciation takeoff inhibit feature as per the service bulletins.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 12 months after the effective date of this airworthiness directive (AD), unless previously accomplished
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
McDonnell Douglas DC-9, DC-9-80, and C-9 (Military) series airplanes listed in Service Bulletins 27-173 (Rev 1) and 27-257 (Rev 1)
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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