AD 75-16-16

75-16-16 ISRAEL AIRCRAFT INDUSTRIES, LTD: Amendment 39-2290. Applies to Israel Aircraft Industries Jet Commander Models 1121, 1121A and 1121B, and Westwind Model 1123 airplanes certificated in all categories having autopilot vertical reference component Collins P/N 332D-11/522-3985-001 or Collins P/N 332D-11A/792-6694-001 or both, installed in an unpressurized area.

Compliance is required as indicated unless already accomplished.

To prevent loss of attitude information and improper operation of the autopilot, accomplish the following:

(a) Before further IFR or night flight, install a placard on the instrument panel in full view of the pilot to read, "Cross Check Attitude Indicators with Third Attitude Indicator to Detect Unflagged Failures".

(b) Within the next 100 hours' time in service, after the effective date of this AD, modify the vertical reference (Collins P/N 332D-11/522-3985-001, or Collins P/N 332D-11A/ 792-6694-001), in accordance with Collins ServiceBulletin No. 9, dated May 1, l974, or an FAA-approved equivalent.

(c) The placard required by paragraph (a) of this AD may be removed when the modification required by paragraph (b) has been accomplished.

This amendment becomes effective August 12, 1975.