AD 58-06-01

58-06-01 CONVAIR: Applies to All Model 240 Series Aircraft.

Compliance required not later than May 15, 1958, and at each 300 hours of operation or next regular inspection nearest thereto, on all aircraft equipped with Bendix Main Landing Gear Assemblies Nos. 155150-1, 155370-1, 159695-6 and 159589-90, with 15,000 hours or more of service time.

A considerable number of reports have been received pertaining to cracking and of failures of the main landing gear axle at the 2.9998-2.9990-inch diameter adjacent to the brake flange. A number of cases resulted in complete failure of the axle and subsequent loss of main landing gear wheel.

As a result of these reported failures, the subject parts must be inspected for cracks in the area described above by means of a dye penetrant or equivalent inspection procedure.

Parts in which cracks are found must be considered unairworthy and be replaced or satisfactorily reworked.

The repetitive inspections specified herein maybe discontinued when parts on the aircraft have been reworked in accordance with Bendix Projects Division, Aircraft Service Department Service Bulletin No. L. G. 595, Convair Newsletter No. 58-1, dated January 1958, or an FAA Western Region Aircraft Engineering Division approved equivalent. Upon request of the operator, an FAA maintenance inspector, subject to prior approval of the Chief, Aircraft Engineering Division, FAA Western Region, may adjust the repetitive inspection intervals specified in this AD to permit compliance at an established inspection period of the operator if the request contains substantiating data to justify the increase for such operator.

(Bendix Projects Division, Aircraft Service Department Service Bulletin No. L. G. 595 and Convair Newsletter No. 58-1, dated January 1958, cover this same subject.)

Revised September 16, 1964.