AD 89-11-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-6 | Airworthiness Directives; McDONNELL DOUGLAS DC-6, -6A, -6B, R6D, C-118A (Military), and DC-7 Series Airplanes |
| aircraft | The Boeing Company | DC-6A | Airworthiness Directives; McDONNELL DOUGLAS DC-6, -6A, -6B, R6D, C-118A (Military), and DC-7 Series Airplanes |
| aircraft | The Boeing Company | DC-6B | Airworthiness Directives; McDONNELL DOUGLAS DC-6, -6A, -6B, R6D, C-118A (Military), and DC-7 Series Airplanes |
| aircraft | The Boeing Company | DC-7 | Airworthiness Directives; McDONNELL DOUGLAS DC-6, -6A, -6B, R6D, C-118A (Military), and DC-7 Series Airplanes |
| aircraft | The Boeing Company | DC-7B | Airworthiness Directives; McDONNELL DOUGLAS DC-6, -6A, -6B, R6D, C-118A (Military), and DC-7 Series Airplanes |
| aircraft | The Boeing Company | DC-7C | Airworthiness Directives; McDONNELL DOUGLAS DC-6, -6A, -6B, R6D, C-118A (Military), and DC-7 Series Airplanes |
| aircraft | The Boeing Company | Navy R6D-1 | Airworthiness Directives; McDONNELL DOUGLAS DC-6, -6A, -6B, R6D, C-118A (Military), and DC-7 Series Airplanes |
| aircraft | The Boeing Company | Navy R6D-1Z | Airworthiness Directives; McDONNELL DOUGLAS DC-6, -6A, -6B, R6D, C-118A (Military), and DC-7 Series Airplanes |
| aircraft | The Boeing Company | USAF C-118A | Airworthiness Directives; McDONNELL DOUGLAS DC-6, -6A, -6B, R6D, C-118A (Military), and DC-7 Series Airplanes |
Unsafe Condition
Stress corrosion cracks in the wing center spar main landing gear fittings could lead to failure of the fittings.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Perform dye penetrant inspections within one month after AD effective date (unless done in last five months), followed by recurring inspections at intervals not exceeding 500 hours time-in-service or one year, whichever comes first. Apply LPS-3 corrosion inhibiting oil after each inspection. If cracks are found, conduct eddy current inspections or replace fittings as specified. Install new 7050-T7452 material fittings to terminate inspections.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within one month after the effective date of this AD, unless already accomplished within the last five months, and thereafter at intervals not to exceed 500 hours time-in-service or one year, whichever occurs first.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
McDonnell Douglas Model DC-6, -6A, -6B, R6D, C-118A (Military), and DC-7 series airplanes, certificated in any category.
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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