AD 74-03-03 ACTIVE

74-03-03 ISRAEL AIRCRAFT INDUSTRIES, LTD.: Amendment 39-1779 as amended by Amendment 39-2847. Applies to Jet Commander Model 1121 and West Wind Model 1123 (S/Ns 3 and subsequent) airplanes, except those incorporating main landing gear upper bodies P/N's 5253505-501 and -502.

Compliance is required as indicated.

To prevent possible failure of the main landing gear, accomplish the following:

(a) Within the next 10 hours' time in service after the effective date of this AD, unless already accomplished since December 9, 1973, and thereafter at intervals prescribed in paragraphs (b), (c), or (d) whichever is applicable, inspect the upper bodies of the main landing gears (P/N's ES 12845-1 and -4) for cracks, rough surfaces and tool marks in accordance with Part 1 of Israeli Aircraft Industries, Ltd. Temporary Service Bulletin No. CJ-10/WW2, dated December 9, 1973, or an FAA-approved equivalent.

(b) If no crack is found during an inspection required by paragraph (a), repeat the inspection required by paragraph (a) at intervals of 200 hours' time in service.

(c) If a crack is found during an inspection required by paragraph (a) that is 0.060 in. deep or less, before further flight, except that the airplane may be flown in accordance with FAR Section 21.197 to a base where the work can be performed, repair in accordance with Part 2 of Israeli Aircraft Industries, Ltd. Temporary Service Bulletin No. CJ-10/WW2, dated December 9, 1973, or an FAA-approved equivalent, and repeat the inspection required by paragraph (a) at intervals of 30 landings or 50 hours' time in service, whichever occurs sooner.

(d) If a crack is found during an inspection required by paragraph (a) that is more than 0.060 in. deep, before further flight, except that the airplane may be flown in accordance with FAR Section 21.197 to a base where the work can be performed, replace the cracked upper body (P/N's ES 12845-1 or -4) with a serviceable part of the same part number,or an FAA- approved equivalent, and repeat the inspection required by paragraph (a) at intervals specified in paragraphs (b), or (c), whichever is applicable.

(e) If rough surfaces or tool marks are found during an inspection required by paragraph (a), before further flight, except that the airplane may be flown in accordance with FAR Section 21.197 to a base where the work can be performed, rework in accordance with Part 1 of Israeli Aircraft Industries, Ltd. Temporary Service Bulletin No. CJ-10/WW2, dated December 9, 1973, or an FAA-approved equivalent, and thereafter continue to inspect in accordance with paragraph (a) at intervals specified in paragraphs (b), or (c), whichever is applicable.

(f) The inspection, repair, replacement and rework requirements contained in paragraphs (a) through (e) of this AD may be discontinued when the main landing gear upper bodies P/N's ES 12845-1 and -4 are replaced with main landing gear upper bodies P/N's 5253505-501 and -502.

NOTENO. 1: Copies of Israeli Aircraft Industries, Ltd. Temporary Service Bulletin No. CJ-10/WW2, dated December 9, 1973, may be obtained from Commodore Aviation, Bethany, Oklahoma 73008.

NOTE NO. 2: The applicable compliance times for the inspection, repair, rework, and replacement required by this AD are contained in this AD and are not those stated in the Israeli Aircraft Industries, Ltd. Temporary Service Bulletin No. CJ-10/WW2 dated December 9, 1973.

Amendment 39-1779 became effective upon publication in the Federal Register as to all persons except those persons to whom it was made immediately effective by the telegram dated December 14, 1973, which contained this amendment.

This amendment 39-2847 becomes effective March 17, 1977.