- Effective
- September 13, 1966
- Models
- (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/, (c) R193/4-30-4/
- Product
- Propeller
- Amendment
- 39-210
Unofficial copy of the text in the FAA’s Dynamic Regulatory System. The FAA’s own copy is the authoritative one. DRS record last changed May 30, 2024.
Copies of the files this page was built from, with their SHA-256. Retrieved October 18, 2026.
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On this page
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 TCDS · 2
The type certificate data sheets for the models this AD names, matched by model and maker.