# AD 81-05-04: Blade Tip Placard

- Type: Airworthiness directive
- Status: Current
- Products: Dowty Propellers CR 289/3-110-F/1 and CR 289/3-110-F/11 with STC SA2731SW or SA3897WE
- Effective: April 2, 1981
- Superseded by: Nothing supersedes this AD
- Product type: Propeller
- Amendment: 39-4132
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8961049E6C03FC218625696600702514.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/81-05-04

## The airworthiness directive

81-05-04 DOWTY ROTOL: Amendment 39-4132. Applies to Dowty Rotol (c)R.289/3-110- F/1 and (c)R.289/3-110-F/11 propellers installed on the WSK-Pezetel Model PZL-3S engine used on Gulfstream American (formerly Grumman) Model G-164A, B, C airplanes modified by STC SA2731SW, and Ayres (formerly Rockwell) Model S2R-R3S, and Model S2R airplanes modified by STC SA3897WE.

Compliance is required as indicated unless previously accomplished. To preclude the possibility of blade tip failures, accomplish the following:

Within the next 10 hours time in service after the effective date of this AD, install in the cockpit as near the engine tachometer as possible and in clear view of the pilot a placard which reads, "AVOID MP ABOVE 26 IN. HG. BELOW 2000 RPM." The placard may be fabricated locally, using 3/32 inch high lettering on a contrasting background.

Upon request of the operator, an equivalent means of compliance with the requirement of this AD may be approved by the Chief, Engineering and Manufacturing Branch, FAA, Great Lakes Region.

This Airworthiness Directive supersedes AD 80-15-09.

This amendment becomes effective June 15, 1981, as to all persons except those to whom it was made immediately effective by the priority mail letter dated February 26, 1981, which contained this amendment.

## Affected data sheets (1) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS P6EU](https://openairdocs.org/tcds/P6EU): Dowty Propellers; names 2 of 3 models: CR 289/3-110-F/1, CR 289/3-110-F/11

## Registered aircraft it may apply to (OpenAirDocs)

No registered aircraft matched the models it names.

## Related documents

- [STC SA2731SW](https://openairdocs.org/stc/SA2731SW): Installation of PZL-3S engine and WSK US-132000/A propeller. Lyon Flying Service Inc, Named in the applicability
- [STC SA3897WE](https://openairdocs.org/stc/SA3897WE): Installation of Pezetel Model PZL-3S engine and Dowty Rotel Model CR289/3-110-F/1 propeller in accordance with Serv-Aero Engineering, Inc. Installation Procedure No. 32679, dated March 26, 1979.  Parts manufactured in accordance with FAA sealed Serv-Aero Master Drawing List No. MDL-9500, dated March 26, 1979, or later FAA approved revision.  (S2R RESTRICTED CATEGORY). Thrush Aircraft Inc., Named in the applicability

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