AD 72-04-02 ACTIVE

72-04-02 BENDIX: Amdt. 39-1393 as amended by Amendment 39-1398. Applies to P/N 2601901 (inboard wheel halves prior to Serial Number B5312 (Production) and Serial Number H204 (Service)) and to P/N 2603561 (inboard wheel halves prior to Serial Number B1996 (Production) and Serial Number H78 (Service)) wheel assemblies (TSO C26B).

Compliance: Required as indicated, unless already accomplished.

To prevent wheel failure accomplish the following:

A) At the next tire change after the effective date of this AD, and thereafter at every other tire change until five (5) additional inspections have been accomplished (except as noted in Paragraph B below), inspect the subject wheel assemblies for cracks. This inspection requires use of the dye penetrant method or an FAA-approved equivalent on the hubs of wheel halves, P/Ns 2602118 and 2603745, with particular attention to the area in or near the radius in the hub I.D. behind the inboard bearing cup. One such FAA-approved equivalent is an eddy current inspection conducted in accordance with Bendix Service Information Letter No. 319, dated September 16, 1971, and Supplement No. 1, dated February 11, 1972, which reduces the number of inspections required herein to one inspection.

B) On wheels that have had a minimum of twelve (12) tire changes, a one time only inspection in accordance with Paragraph A is required.

C) If cracks are found during any inspection required by Paragraphs A or B, prior to further flight, replace all defective parts with airworthy parts. The replacement of defective parts will not relieve the requirement for accomplishing the repetitive inspections specified in Paragraph A.

Bendix Service Information Letter No. 319, dated September 16, 1971, and Supplement No. 1, dated February 11, 1972, pertains to this subject.

Amendment 39-1393 became effective February 17, 1972.

This Amendment 39-1398 becomes effective March 4, 1972.