AD 73-09-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-9-11 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10 Series Airplanes |
| aircraft | The Boeing Company | DC-9-12 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10 Series Airplanes |
| aircraft | The Boeing Company | DC-9-13 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10 Series Airplanes |
| aircraft | The Boeing Company | DC-9-14 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10 Series Airplanes |
| aircraft | The Boeing Company | DC-9-15 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10 Series Airplanes |
| aircraft | The Boeing Company | DC-9-15F | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10 Series Airplanes |
Unsafe Condition
Fatigue cracks in fuselage frames (P/N 9915590, 9958198, 9958200, and 9958202) at fuselage stations 503, 525, or 544 between and surrounding the two upper bolts attaching the frames to the transverse floor beam member.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the lower sections of specified fuselage frames using dye penetrant methods or magnifying glass (4-power minimum) to detect cracks. If cracks are found, replace with new parts of the same design, repair per FAA-approved method, or repair per Douglas Service Bulletin 53-117. Adjust subsequent inspection intervals based on corrective action taken.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 1000 hours time in service and thereafter at intervals not to exceed 2000 hours time in service from the last inspection for airplanes with 10,000 hours or more time in service on the effective date. For airplanes with less than 10,000 hours, comply before accumulating 11,000 hours time in service.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
MCDONNELL DOUGLAS DC-9-10 Series Airplanes (Models DC-9-11, DC-9-12, DC-9-13, DC-9-14, DC-9-15, DC-9-15F) 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
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.