AD 69-10-01

69-10-01 NORTH AMERICAN ROCKWELL: Amendment 39-764. Applies to NA- 265 Series aircraft equipped with main landing gear pistons P/N 174447 (LH), 174448 (RH), 174981 (LH), 174982 (RH), 2573965 (LH), 2573966 (RH), 1127L011-1 (lH), or 1127L011-2 (RH) with serial numbers which have not been altered by the addition of the letter "L", "R", or "T" in accordance with the instructions contained in Los Angeles Division of North American Rockwell Corporation Sabreliner Field Service Bulletin No. 69-2, dated March 31, 1969, or later revision approved by the Chief, Aircraft Engineering Division, FAA, Western Region.

Compliance required as indicated, unless already accomplished.

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

PART I (a) Part I of this AD applies to landing gear pistons, P/N 174981 (LH) (Serial Nos. S-132A, S-145, S-148, S-153, S-158, S-162, S-169, and S-172) and 174982 (RH) (Serial Nos. S- 144, S-149, S-154, S-157, S-159, S-161, S-164, S-165, S-166, and S-168).

(b) Within 15 hours time in service after the effective date of this AD, accomplish the following:

(1) Rework and inspect the lower inside diameter of the piston in accordance with instructions contained in the above mentioned service bulletin No. 69-2, dated March 31, 1969, or later revision approved by the Chief, Aircraft Engineering Division, FAA Western Region; or

(2) Replace main landing gear pistons with parts which have been identified in accordance with Service Bulletin 69-2 with the letter "L", "R", or "T" following the serial number on the lower outboard side of the piston, or with another approved piston.

PART II (a) Part II of this AD applies to all affected landing gear pistons not listed in Part I above.

(b) Within the next 300 hours time in service after the effective date of this AD accomplish the following:

(1) Inspect the lower inside diameter of the piston and rework as necessary in accordance with instructions contained in the above mentioned Service Bulletin No. 69-2, dated March 31, 1969, or later revision approved by the Chief, Aircraft Engineering Division, FAA Western Region; or

(2) Replace each main landing gear piston with a piston which has been identified in accordance with Service Bulletin No. 69-2 with the letter "L", "R", or "T" following the serial number on the lower outboard side of the piston or with another approved piston.

This amendment becomes effective May 9, 1969.