# AD 83-21-01: Engine/Propeller Combination Inspection/Modification

- Type: Airworthiness directive
- Status: Current
- Products: Wytwornia Sprzetu Komunikacyjnego PZL-3S
- Effective: October 26, 1983
- Superseded by: Nothing supersedes this AD
- Product type: Engine
- Amendment: 39-4743
- Registered aircraft: 5 may be affected, by airframe or engine model (OpenAirDocs)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8FF26B649AD5724486256842006EED9F.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/83-21-01

## The airworthiness directive

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.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS E18EU](https://openairdocs.org/tcds/E18EU): Wytwornia Sprzetu Komunikacyjnego; names 1 of 3 models: PZL-3S

## Registered aircraft it may apply to (OpenAirDocs)

Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment.

- Aircraft: 5 (0 by airframe model, 5 by engine model)
- Makers: Wsk-Pzl-Mielec 4, Aero Commander 1

Models with the most aircraft:

- [Wsk-Pzl PZL-3S](https://openairdocs.org/engine/wsk-pzl-pzl-3s): 5 aircraft (engine model)

All 1 models: https://openairdocs.org/ad/83-21-01/models.md
Every aircraft: https://openairdocs.org/ad/83-21-01/aircraft.md

Its text cites no advisory circulars or STCs.

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