AD 63-10-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Steward-Davis Incorporated | C-82A | Airworthiness Directives; Fairchild Model C-82A and C-82A Jet Packet Aircraft |
| aircraft | Steward-Davis Incorporated | C-82A Jet Packet | Airworthiness Directives; Fairchild Model C-82A and C-82A Jet Packet Aircraft |
Unsafe Condition
Premature wear in the bushings of the original rear heavyweight crankshaft vibration dampers in R-2800 'C' Series engines reduces crankshaft damping characteristics, causing propeller blade vibration stresses above safe limits. Flight operations at gross weights over 36,500 pounds with unmodified 6491-0 propeller blades also impose excessive vibration stresses.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install a placard on the instrument panel and apply red arc tachometer markings to avoid 1,550-1,650 r.p.m. operations. Replace crankshaft assemblies with P/N 326054 or engines with CA/CB crankshafts within specified time limits. Modify or replace 6491-0 propeller blades and rework propeller hub components per specified procedures, or revise operating limitations to restrict gross weight and power.
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Compliance Time
Compliance required as indicated in the AD: (a) within 100 hours' time in service after June 6, 1963; (b) within 300 hours' time in service after June 6, 1963 (or prior to 650 hours since new/overhaul for engines with <350 hours as of June 6, 1963); (c) and (d) within 300 propeller hours' time in service after June 6, 1963; (e) no time specified but must be done prior to propeller modifications if choosing weight/power restrictions.
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Affected Aircraft
Steward-Davis Incorporated C-82A and C-82A Jet Packet aircraft with Pratt & Whitney R-2800 C, CA, or CB Series engines and Hamilton Standard 33E60/6491-0 or 33E60/6801-0 propellers.
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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