AD 72-03-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-9-11 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 (-10, -20, -30 and -40 Series and C-9A) Airplanes |
| aircraft | The Boeing Company | DC-9-12 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 (-10, -20, -30 and -40 Series and C-9A) Airplanes |
| aircraft | The Boeing Company | DC-9-13 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 (-10, -20, -30 and -40 Series and C-9A) Airplanes |
| aircraft | The Boeing Company | DC-9-14 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 (-10, -20, -30 and -40 Series and C-9A) Airplanes |
| aircraft | The Boeing Company | DC-9-15 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 (-10, -20, -30 and -40 Series and C-9A) Airplanes |
| aircraft | The Boeing Company | DC-9-15F | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 (-10, -20, -30 and -40 Series and C-9A) Airplanes |
| aircraft | The Boeing Company | DC-9-21 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 (-10, -20, -30 and -40 Series and C-9A) Airplanes |
| aircraft | The Boeing Company | DC-9-31 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 (-10, -20, -30 and -40 Series and C-9A) Airplanes |
| aircraft | The Boeing Company | DC-9-32 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 (-10, -20, -30 and -40 Series and C-9A) Airplanes |
| aircraft | The Boeing Company | DC-9-32 (VC-9C) | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 (-10, -20, -30 and -40 Series and C-9A) Airplanes |
Unsafe Condition
Failure of the elevator boost cylinder rod end could cause jamming of the elevator and loss of elevator power assist in the down direction.
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Required Actions
Within 300 hours time in service after March 7, 1972, visually inspect the universal fitting and rod end assembly for proper installation. If improper installation is found, replace with a new part before further flight. Additionally, inspect for cracks or failed parts and replace if found. Further, within 1200 hours time in service after March 7, 1972, perform inspections and modifications per Service Bulletin 27-146, including hardness testing, structural modifications, and installing new retainers. Recurring inspections at intervals not exceeding 300 hours time in service are required.
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Compliance Time
Within the next 300 hours time in service after March 7, 1972, and at intervals not to exceed 300 hours time in service thereafter for recurring inspections. Additionally, within 1200 hours time in service after March 7, 1972, for the inspections and modifications per Service Bulletin 27-146.
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Affected Aircraft
McDonnell Douglas DC-9 (-10, -20, -30 and -40 Series and C-9A) airplanes listed in Douglas DC-9 Service Bulletin No. 27-146, Revision 1, dated 20 December 1971, or later FAA-approved revisions.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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