AD 78-01-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-9-11 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9, C-9A, C-9B and VC-9C. |
| aircraft | The Boeing Company | DC-9-12 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9, C-9A, C-9B and VC-9C. |
| aircraft | The Boeing Company | DC-9-13 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9, C-9A, C-9B and VC-9C. |
| aircraft | The Boeing Company | DC-9-14 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9, C-9A, C-9B and VC-9C. |
| aircraft | The Boeing Company | DC-9-15 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9, C-9A, C-9B and VC-9C. |
| aircraft | The Boeing Company | DC-9-15F | Airworthiness Directives; MCDONNELL DOUGLAS DC-9, C-9A, C-9B and VC-9C. |
| aircraft | The Boeing Company | DC-9-21 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9, C-9A, C-9B and VC-9C. |
| aircraft | The Boeing Company | DC-9-31 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9, C-9A, C-9B and VC-9C. |
| aircraft | The Boeing Company | DC-9-32 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9, C-9A, C-9B and VC-9C. |
| aircraft | The Boeing Company | DC-9-32 (VC-9C) | Airworthiness Directives; MCDONNELL DOUGLAS DC-9, C-9A, C-9B and VC-9C. |
Unsafe Condition
The tail cone emergency exit release handle lacks adequate locating and operating markings, which could result in improper operation during emergency evacuation.
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Required Actions
Modify the tail cone emergency exit release handle markings in accordance with McDonnell Douglas Service Bulletin 53-134, Revision 1, dated December 16, 1977 or later FAA approved revision, or an equivalent modification approved by the Chief, Aircraft Engineering Division, FAA Western Region.
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Compliance Time
within 180 days from the effective date of this AD
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Affected Aircraft
MCDONNELL DOUGLAS DC-9, C-9A, C-9B, and VC-9C models, including all passenger and passenger/cargo Model DC-9 airplanes certificated in all categories
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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