AD 80-02-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-9-11 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 Series Aircraft |
| aircraft | The Boeing Company | DC-9-12 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 Series Aircraft |
| aircraft | The Boeing Company | DC-9-13 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 Series Aircraft |
| aircraft | The Boeing Company | DC-9-14 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 Series Aircraft |
| aircraft | The Boeing Company | DC-9-15 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 Series Aircraft |
| aircraft | The Boeing Company | DC-9-15F | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 Series Aircraft |
| aircraft | The Boeing Company | DC-9-21 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 Series Aircraft |
| aircraft | The Boeing Company | DC-9-31 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 Series Aircraft |
| aircraft | The Boeing Company | DC-9-32 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 Series Aircraft |
| aircraft | The Boeing Company | DC-9-32 (VC-9C) | Airworthiness Directives; MCDONNELL DOUGLAS DC-9 Series Aircraft |
Unsafe Condition
Cracks in the aft pressure bulkhead door, specifically in the web and doublers adjacent to the inboard ends of the guide pin fittings (P/N 3913926), could lead to structural failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the aft pressure bulkhead door by removing it and all liner/insulation, conducting a close visual inspection for cracks, repairing per FAA-approved data or operating unpressurized with a placard, and reporting results within five working days.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 25 landings, but not later than 72 elapsed hours after the effective date of this AD, unless already accomplished under telegraphic AD T79WE-20 dated December 1, 1979.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
All Model DC-9 series aircraft equipped with non-ventral aft pressure bulkhead door, P/N 5910367, certificated in all categories.
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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