AD 93-23-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-9-11 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series Airplanes; DC-9-81, -82, -83, and -87 Series Airplanes; MD-88 Airplanes; and C-9 (Military) Airplanes |
| aircraft | The Boeing Company | DC-9-12 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series Airplanes; DC-9-81, -82, -83, and -87 Series Airplanes; MD-88 Airplanes; and C-9 (Military) Airplanes |
| aircraft | The Boeing Company | DC-9-13 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series Airplanes; DC-9-81, -82, -83, and -87 Series Airplanes; MD-88 Airplanes; and C-9 (Military) Airplanes |
| aircraft | The Boeing Company | DC-9-14 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series Airplanes; DC-9-81, -82, -83, and -87 Series Airplanes; MD-88 Airplanes; and C-9 (Military) Airplanes |
| aircraft | The Boeing Company | DC-9-15 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series Airplanes; DC-9-81, -82, -83, and -87 Series Airplanes; MD-88 Airplanes; and C-9 (Military) Airplanes |
| aircraft | The Boeing Company | DC-9-15F | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series Airplanes; DC-9-81, -82, -83, and -87 Series Airplanes; MD-88 Airplanes; and C-9 (Military) Airplanes |
| aircraft | The Boeing Company | DC-9-21 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series Airplanes; DC-9-81, -82, -83, and -87 Series Airplanes; MD-88 Airplanes; and C-9 (Military) Airplanes |
| aircraft | The Boeing Company | DC-9-31 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series Airplanes; DC-9-81, -82, -83, and -87 Series Airplanes; MD-88 Airplanes; and C-9 (Military) Airplanes |
| aircraft | The Boeing Company | DC-9-32 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series Airplanes; DC-9-81, -82, -83, and -87 Series Airplanes; MD-88 Airplanes; and C-9 (Military) Airplanes |
| aircraft | The Boeing Company | DC-9-32 (VC-9C) | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series Airplanes; DC-9-81, -82, -83, and -87 Series Airplanes; MD-88 Airplanes; and C-9 (Military) Airplanes |
Unsafe Condition
Reduced structural integrity of the nose wheel assembly resulting from installation of a suspected unapproved part.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Within 60 days after the effective date, perform a one-time visual inspection of nose wheel assemblies (part numbers 9550267-6 or 9550267-7) to ensure correct identification per Aircraft Braking Systems Corporation Service Letter. If not identified correctly, replace with FAA-approved assembly before further flight. Alternatively, determine if assemblies were in possession of Aviation Wheel and Brake; if yes or undetermined, perform the inspection. Prohibit installation of non-compliant assemblies without prior inspection or possession determination.
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Compliance Time
Within 60 days after the effective date of this AD
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Affected Aircraft
All Model DC-9-10, -20, -30, -40, -50; DC-9-81, -82, -83, -87; MD-88; and C-9 (military) airplanes equipped with nose wheel assembly part numbers 9550267-6 or 9550267-7.
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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