81-26-05 R1: Wing Station 99 Attach Joint

81-26-05 R1 FAIRCHILD AIRCRAFT CORP.: Amendment 39-4286 as amended by Amendment 39-5469. Applies to Models SA26T (S/N T26-2 through T26-99), and SA26-AT (S/N T26-100 through T26-999) airplanes certificated in any category. Compliance: Required within the next 25 hours time in service after the effective date of this AD, and thereafter at intervals not to exceed 200 hours time-in-service since last compliance, unless already accomplished. To prevent a failure at the lower forward wing station 99 attach joint, accomplish the following: (a) In accordance with Fairchild Service Bulletin 26-57-40-015, issued January 18, 1972, as revised June 26, 1986: (1) Remove the lower forward wing station 99 attach joint coverplate and wing attach bolt. (2) Inspect the lower forward wing station 99 attaching fitting for deterioration and cracks and, prior to further flight, replace damaged parts with new parts of the same part numbers. (3) Inspect the lower forwardwing station 99 attach bolt for identifying part number, deterioration and cracks and, prior to further flight, replace any damaged bolt or bolt not identified as P/N MS20014-29 bolt with a new P/N MS20014-29 bolt. (b) When the wing has been modified by (STC) SA1830NM, "Installation of Wing Spar Reinforcement," the inspection intervals required by this AD may be increased from 200 hours time-in-service to 1,500 hours time-in-service or every 3 years since last compliance, whichever occurs first. (c) The intervals between repetitive inspections required by this AD may be adjusted up to 10 percent of the specified interval to allow accomplishing these inspections concurrent with other scheduled maintenance of the airplane. (d) A special flight permit may be issued in accordance with FAR 21.197 to a location where this AD may be accomplished. (e) An equivalent method of compliance with this AD may be used when approved by the Manager, Airplane Certification Branch, ASW-150, Southwest Regional Office, FAA, Fort Worth, Texas 76101; Telephone (817) 624-5150. All persons affected by this AD may obtain copies of the documents referred to herein upon request to Fairchild Aircraft Corp., Post Office Box 32486, San Antonio, Texas 78284; and AviaDesign, Inc., Hangar 1, 173 Durley Avenue, Camarillo Airport, Camarillo, California 93010; or FAA, Office of the Regional Counsel, Room 1558, 601 East 12th Street, Kansas City, Missouri 64106. This AD revises AD 81-26-05, Amendment 39-4286, which became effective December 30, 1981. This amendment, 39-5469, becomes effective on December 29, 1986.