AD 91-22-07
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 and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-12 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-13 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-14 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-15 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-15F | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-21 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-31 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-32 | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series and C-9 (Military) Series Airplanes |
| aircraft | The Boeing Company | DC-9-32 (VC-9C) | Airworthiness Directives; MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, and -50 Series and C-9 (Military) Series Airplanes |
Unsafe Condition
Loss of the LH or RH MLG outboard door due to delamination, corrosion, pitting, wear, cracks, or insufficient hinge lobe wall thickness.
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Required Actions
Inspect MLG door for delamination; inspect linkages and attachments for corrosion, pitting, wear, and conditions; inspect hinge lobes and halves for cracks and corrosion; measure aluminum hinge lobe wall thickness if bushed. Repairs must be approved by the Los Angeles ACO before further flight.
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Compliance Time
Within 30 days after February 11, 1991 (Group I) or 50 days after December 3, 1991 (Group II), and thereafter every one year. For Groups I and II, within 18 months after December 3, 1991.
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Affected Aircraft
MCDONNELL DOUGLAS DC-9-10, -20, -30, -40, -50 series and C-9 (Military) series airplanes with MLG outboard doors having wing-mounted aluminum (Group I) or titanium (Group II) hinge halves.
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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