81-13-04 ROCKWELL INTERNATIONAL: Amendment 39-4167. Applies to Models NA-265-60 (S/N 306-5, -6, -12, -16, -24, -47, -50, -71, -73, -81, -109, -116, -119, and -122); NA- 265-70 (S/N 370-1 through -9); and NA-265-80 (S/N 380-1 through -72) airplanes certificated in any category.
COMPLIANCE: Required as indicated unless already accomplished. Reflect this AD compliance by an appropriate entry in the aircraft maintenance records.
A) Prior to next flight, clean interior of (MLG) shock strut trunnion and measure inside diameter of trunnion from aft side of gear using an internal micrometer. (Ref. Fig. 1 Sabreliner Service Bulletin 81-4, dated June 11, 1981.)
1. If measurement is 2.948 inches or less, return the airplane to service with an appropriate entry in the aircraft maintenance record.
2. If the measurement exceeds 2.948 inches, either replace the outer cylinder with an airworthy part (P/N 1127L001-3, -4, -5, or -6) and return the aircraft to service with an appropriate entry in the aircraft maintenance record, or remove the airplane from service and contact the FAA Aircraft Certification Program Office at telephone (316) 942-4219.
B) A special flight permit, in accordance with Federal Aviation Regulation (FAR) 21.197 for a flight by the most direct route to a base where maintenance can be performed, is authorized provided a dye penetrant check of the shaded area of the main landing gear shock strut outer cylinder as shown on Figure 1 of Sabreliner Service Bulletin No. 81-4, dated June 11, 1981, is conducted and no cracks are found. If cracks are found, a ferry flight will not be authorized unless the defective outer cylinder is replaced with an airworthy part (P/N 1127L001-3, -4, -5, or -6). The airplane shall be limited to a maximum gross weight of 20,500 pounds and a landing weight of 17,500 pounds for this special flight.
C) The owner/operator shall report defects found to the Chief, Aircraft Certification Program at the address shown in Paragraph D) below, within 48 hours of the inspection. (Reporting approved by the Office of Management and Budget under OMB No. 04-R0174.)
D) Any equivalent method of compliance with this AD must be approved by the Chief, Aircraft Certification Program, Federal Aviation Administration, Room 238, Terminal Building 2299, Mid-Continent Airport, Wichita, Kansas 67209; telephone (316) 942-4285.
Saberliner Service Bulletin No. 81-4, dated June 11, 1981, pertains to the subject matter of this AD.
This amendment becomes effective on July 30, 1981, to all persons except those to whom it has already been made effective by an airmail letter from the FAA dated June 16, 1981, and is identified as AD 81-13-04.