82-25-01 R1: Right and Left Main Landing Gear Positioning Rod Ends

82-25-01 R1 SIKORSKY: Amendment 39-4508, as amended by Amendment 39-5456. Applies to model S-76A helicopters having serial numbers prior to 760308, certificated in all categories. For helicopters with main left and right landing gear positioning rod ends with 1,500 or more hours' time in service on the effective date of this AD, compliance is required within the next 25 hours' time in service after the effective date of this AD, unless already accomplished within the last 75 hours' time in service, and thereafter at intervals not to exceed 100 hours' time in service from the last inspection. For helicopters with main left and right landing gear positioning rod ends with less than 1,500 hours' time in service after the effective date of this AD, compliance is required before the accumulation of 1,525 hours' time in service and thereafter at intervals not to exceed 100 hours' time in service from the last inspection. NOTE: If the main left and right landing gear positioning rod end hours' time in service cannot be determined, an estimate of the hours' time in service based upon the past operation of the part may be made and submitted for approval to the Manager, Boston Aircraft Certification Branch, FAA New England Region, Aircraft Certification Division, Federal Aviation Administration, 12 New England Executive Park, Burlington, Massachusetts 01803; telephone (617) 273-7118. To preclude possible failure of the S-76 main left and right landing gear positioning rod end fittings, Part Number KR10MEAK, inspect for cracks and replace the rod end fittings as required in accordance with applicable portions of paragraph E, "Accomplishment Instructions" of Sikorsky Alert Service Bulletin 76-32-10, dated October 8, 1982, as modified by Sikorsky message CST-SPT-82-654, dated October 14, 1982, or as specified in an FAA approved equivalent instruction. Within the next 300 hours' time in service but no later than 6 months after the effective date of this amendment, unless already accomplished, replace rod end fitting, P/N KR10MEAK and mating parts with rod end fitting P/N 1945E235 and all improved parts contained in Sikorsky's main landing gear structural improvement kit P/N 76070-25004-011 in accordance with Sikorsky CSN 76-134 dated May 6, 1983, or CSN 76-134A dated January 10, 1984, paragraphs A through D. Revise the aircraft weight and balance. NOTE: Installation of the P/N 76070-25004-011 main landing gear structural improvement kit terminates the inspection requirements of this AD. Paragraph B(1)(e) of each CSN requires reidentification of a modified bellcrank to P/N 76250-02104-042. Service lives and mandatory inspection requirements for specific parts contained in the landing gear structural improvement kit are contained in the Airworthiness Limitations Section, Chapter 4 of the Revised Sikorsky S-76A Maintenance Manual No. SA 4047-76-2-1 (replacement serialized parts) and are also stated in Amendment 39-5298, AD 86-09-11 (replacement non-serialized parts). Alternate inspections, adjustment of the inspection interval, or other actions which provide an equivalent level of safety must be approved by the Manager, Boston Aircraft Certification Branch, FAA New England Region, Aircraft Certification Division, Federal Aviation Administration, 12 New England Executive Park, Burlington, Massachusetts 01803; telephone (617) 273-7118. This procedure shall be done in accordance with prescribed parts of Sikorsky CSN 76-134, dated May 6, 1983, or CSN 76-134A, dated January 10, 1984. This incorporation by reference was approved by the Director of the FEDERAL REGISTER in accordance with 5 U.S.C. 552(a) and 1 CFR Part 51. Copies may be obtained from Sikorsky Aircraft, Division of United Technologies Corporation, Attention: Commercial Product Support Department, 6900 Main Street, Stratford, Connecticut 06601-1381. Copies may be inspected at Office of Regional Counsel, FAA, Southwest Region, 4400Blue Mound Road, Fort Worth, Texas, or the office of the FEDERAL REGISTER, 1100 L Street, NW., Room 8401, Washington, D.C. This amendment amends Amendment 39-4508, AD 82-25-01 which became effective December 6, 1982. This amendment, 39-5456, becomes effective on December 1, 1986.