# AD 66-09-01: Blade

- Type: Airworthiness directive
- Status: Current
- Products: Dowty Propellers (c) R130/4-20-4/, (c) R148/4-20-4/, (c) R175/4-30-4/, (c) R179/4-20-4/, (c) R184/4-30-4/, (c) R186/4-30-4/ and (c) R193/4-30-4/
- Effective: September 13, 1966
- Superseded by: Nothing supersedes this AD
- Product type: Propeller
- Amendment: 39-210
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DAE9034AB9F37A068625696D0051F2AE.0001
- DRS record last changed: May 30, 2024
- Page: https://openairdocs.org/ad/66-09-01

## The airworthiness directive

66-09-01 DOWTY ROTOL: Amdt. 39-210 Part 39 Federal Register March 16, 1966. Applies to the following Dowty Rotol Propellers with Propeller Blade Serial Numbers Below A.105040: (c) R175/4-30-4/13E Installed on Fairchild F-27 and F-27B; (c) R193/4-30-4/50, Installed on Fairchild F-27A, F-27F, and F-27G; (c) R186/4-30-4/16, Installed on Armstrong Whitworth Argosy Type AW650 Series 101; (c) R184/4-30-4/50, Installed on Grumman G-159; (c) R148/4-20-4/21E, Installed on Viscount 744, (c) R130/4-20-4/12E, Installed on Viscount 745D; and (c) R179/4-20-4/33, Installed on Viscount 810.

Compliance required at the next replacement of deicer boots after the effective date of this AD, unless already accomplished.

To prevent failures of the bond between the deicing boots and the propeller blade's surface, accomplish the following:

Apply preprimer Cellon SL4853/4854, or on FAA-approved equivalent, to the surface of the propeller blades before the application of any other primers, inaccordance with Dowty Rotol Service Bulletin No. 61-157 (Modification No. (c) VP.1941) Revision 2 or later ARB-approved revision.

This directive effective April 15, 1966.

Revised September 13, 1966.

## Affected data sheets (2) (OpenAirDocs)

The type certificate data sheets whose models the AD names.

- [TCDS P-899](https://openairdocs.org/tcds/P-899): Dowty Propellers; names 4 of 9 models: (c) R175/4-30-4/, (c) R193/4-30-4/, (c) R184/4-30-4/, (c) R186/4-30-4/
- [TCDS P-890](https://openairdocs.org/tcds/P-890): Dowty Propellers; names 3 of 5 models: (c) R148/4-20-4/, (c) R130/4-20-4/, (c) R179/4-20-4/

## Registered aircraft it may apply to (OpenAirDocs)

No registered aircraft matched the models it names.

Its text cites no advisory circulars or STCs.

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