AD 82-10-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-9-31 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9, Series 30, 50, 80 and C-9B Airplanes |
| aircraft | The Boeing Company | DC-9-32 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9, Series 30, 50, 80 and C-9B Airplanes |
| aircraft | The Boeing Company | DC-9-32 (VC-9C) | Airworthiness Directives; MCDONNELL DOUGLAS DC-9, Series 30, 50, 80 and C-9B Airplanes |
| aircraft | The Boeing Company | DC-9-32F | Airworthiness Directives; MCDONNELL DOUGLAS DC-9, Series 30, 50, 80 and C-9B Airplanes |
| aircraft | The Boeing Company | DC-9-32F (C-9A) | Airworthiness Directives; MCDONNELL DOUGLAS DC-9, Series 30, 50, 80 and C-9B Airplanes |
| aircraft | The Boeing Company | DC-9-32F (C-9B) | Airworthiness Directives; MCDONNELL DOUGLAS DC-9, Series 30, 50, 80 and C-9B Airplanes |
| aircraft | The Boeing Company | DC-9-33F | Airworthiness Directives; MCDONNELL DOUGLAS DC-9, Series 30, 50, 80 and C-9B Airplanes |
| aircraft | The Boeing Company | DC-9-34 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9, Series 30, 50, 80 and C-9B Airplanes |
| aircraft | The Boeing Company | DC-9-34F | Airworthiness Directives; MCDONNELL DOUGLAS DC-9, Series 30, 50, 80 and C-9B Airplanes |
| aircraft | The Boeing Company | DC-9-51 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9, Series 30, 50, 80 and C-9B Airplanes |
Unsafe Condition
Loss of ability to trim the aircraft by use of the primary longitudinal trim system due to failure of the horizontal stabilizer alternate longitudinal trim motor (P/N D1775) with specific serial numbers listed in Service Bulletin A27-234.
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Required Actions
Determine the serial number of the horizontal stabilizer alternate longitudinal trim motor (P/N D1775) via visual examination or maintenance records. Replace the motor if its serial number is listed in table of item #2 in Service Bulletin A27-234. Alternative means of compliance may be used if approved by the FAA.
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Compliance Time
within 90 days unless already accomplished
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Affected Aircraft
McDonnell Douglas DC-9, series 30, 50, 80 and C-9B airplanes with factory serial numbers listed in Service Bulletin A27-234.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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