AD 89-14-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-9-11 | Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, -50, and C-9 Series Airplanes |
| aircraft | The Boeing Company | DC-9-12 | Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, -50, and C-9 Series Airplanes |
| aircraft | The Boeing Company | DC-9-13 | Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, -50, and C-9 Series Airplanes |
| aircraft | The Boeing Company | DC-9-14 | Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, -50, and C-9 Series Airplanes |
| aircraft | The Boeing Company | DC-9-15 | Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, -50, and C-9 Series Airplanes |
| aircraft | The Boeing Company | DC-9-15F | Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, -50, and C-9 Series Airplanes |
| aircraft | The Boeing Company | DC-9-21 | Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, -50, and C-9 Series Airplanes |
| aircraft | The Boeing Company | DC-9-31 | Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, -50, and C-9 Series Airplanes |
| aircraft | The Boeing Company | DC-9-32 | Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, -50, and C-9 Series Airplanes |
| aircraft | The Boeing Company | DC-9-32 (VC-9C) | Airworthiness Directives; McDONNELL DOUGLAS DC-9-10, -20, -30, -40, -50, and C-9 Series Airplanes |
Unsafe Condition
Premature fatigue failure of engine mount cone bolts, specifically Barry Controls part numbers R18210-2 (serial numbers 15B8021 through 15B8382, excluding 15B8329-15B8331, and 15B8396-15B8399) and R18211-2 (serial numbers 15B5242 through 15B5320).
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Required Actions
Determine within 90 days after the effective date if specified cone bolts are installed. If found or undetermined, remove and replace with properly heat-treated bolts within 2,000 flight hours after installation or 15 days after discovery, whichever is later, per Service Bulletin 71-46. Alternate compliance may be approved by the FAA Manager.
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Compliance Time
Within 90 days after the effective date for determination; replacement within 2,000 flight hours after installation or 15 days after discovery, whichever occurs later.
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Affected Aircraft
McDonnell Douglas DC-9-10, -20, -30, -40, -50, and C-9 series airplanes, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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