83-21-01 WYTWORNIA SPRZETU KOMUNIKACYJNEGO "PZL-RZESZOW": Amendment 39- 4743. Applies to PZL-3S engine.
Compliance is required as indicated unless already accomplished.
To preclude the possibility of in-flight propeller loss, accomplish the following:
(a) Operation of any of the following engine propeller combinations is prohibited:
(1) WSK "PZL-RZESZOW" PZL-3S engine with Dowty Rotol CR 289/3-110-F/1 propeller.
(2) WSK "PZL-RZESZOW" PZL-3S engine with Dowty Rotol CR 289/3-110-F/11 propeller.
(3) WSK "PZL-RZESZOW" PZL-3S engine with Dowty Rotol CR 289/3-110-F/12 propeller.
(b) Engines which have had service in any of the engine/propeller combinations listed in (a) must be inspected for wear prior to further operation with any other propellers. This inspection must include a visual inspection of the disassembled rear crankshaft, rear counterweight, rear counterweight pins, front crankshaft, crankshaft nut and propeller shaft.
(c) If, during inspections required in (b), any signs of unusual wear or damage are detected, remove the engine from service, inspect for secondary damage, and repair as necessary prior to return to service.
(d) Alternate inspections, modifications or other actions which provide an equivalent level of safety may be used if approved by the Manager, Aircraft Certification Division, New England Region, Federal Aviation Administration, 12 New England Executive Park, Burlington, Massachusetts.
(e) This AD supersedes AD 82-23-04 Amendment 39-4489 and emergency AD 83-15-06.
This amendment becomes effective October 26, 1983.