AD 65-21-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-8-11 | Airworthiness Directives; DOUGLAS DC-8 Airplanes |
| aircraft | The Boeing Company | DC-8-12 | Airworthiness Directives; DOUGLAS DC-8 Airplanes |
| aircraft | The Boeing Company | DC-8-21 | Airworthiness Directives; DOUGLAS DC-8 Airplanes |
| aircraft | The Boeing Company | DC-8-31 | Airworthiness Directives; DOUGLAS DC-8 Airplanes |
| aircraft | The Boeing Company | DC-8-32 | Airworthiness Directives; DOUGLAS DC-8 Airplanes |
| aircraft | The Boeing Company | DC-8-33 | Airworthiness Directives; DOUGLAS DC-8 Airplanes |
| aircraft | The Boeing Company | DC-8-41 | Airworthiness Directives; DOUGLAS DC-8 Airplanes |
| aircraft | The Boeing Company | DC-8-42 | Airworthiness Directives; DOUGLAS DC-8 Airplanes |
| aircraft | The Boeing Company | DC-8-43 | Airworthiness Directives; DOUGLAS DC-8 Airplanes |
| aircraft | The Boeing Company | DC-8-51 | Airworthiness Directives; DOUGLAS DC-8 Airplanes |
Unsafe Condition
Cracking in the radius of the torque link lug of the main landing gear strut piston could lead to failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Rework landing gear strut piston assemblies per Douglas Service Bulletin 32-99, Revision 3 or equivalent; inspect for cracks using dye penetrant; replace or rework parts with cracks ≥0.040 inch or before further flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 4,500 hours' time in service after the effective date of this AD or before the accumulation of 8,500 hours' time in service
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Douglas DC-8 models DC-8-11, DC-8-12, DC-8-21, DC-8-31, DC-8-32, DC-8-33, DC-8-41, DC-8-42, DC-8-43, DC-8-51, etc., with landing gear strut piston assemblies having Douglas P/N 5598229, 5598343, 5719155, 5773028, 5773029, or 5773030.
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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