65-18-02 SCHWIEN: Amdt. 39-117-Part 39 Federal Register August 19, 1965. Applies to All Model S-27200 Turn and Bank Indicators.
Compliance required before further IFR flight or at the next instrument overhaul, whichever occurs first, unless already accomplished.
To prevent further fatigue failures of the zinc die cast rotor, replace zinc die cast rotor assembly, P/N 11-7347, with General Design, Inc. steel rotor, P/N 3553-2, and two cup assembly bearings, P/N 3659, in accordance with paragraph 2 (Accomplishment Instructions) of General Design Service Bulletin No. 12.0.2800, dated June 1965, or an equivalent approved by the Aircraft Engineering Division, FAA Western Region.
This directive effective August 17, 1965.
Revised October 30, 1965.