AD 69-12-05

69-12-05 CANADAIR: Amendment 39-777. Applies to CL-44 Type airplanes.

To detect cracks in certain interspar ribs accomplish the following:

(a) Inspect for cracks the corners of the access cutouts in the interspar ribs at wing stations in accordance with the "Inspection Procedure" outlined in Canadair Service Information Circular (SIC) No. 373 dated June 11, 1968, disregarding paragraph 3 and 4, or later FAA- approved revision, or an FAA-approved equivalent inspection.

(b) Replace cracked parts before further flight with a part of the same part number or an FAA-approved equivalent part, or repair cracked parts before further flight in accordance with Canadair Service Bulletin No. 475, or an FAA-approved equivalent repair.

(c) The repetitive inspection required by (a) need not be performed if each of the above ribs are reinforced in accordance with Canadair Service Bulletin No. 475, or an FAA- approved equivalent alteration.

(d) Equivalent parts, inspections, alterations, repairs and SIC revisions must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region.

(e) The compliance times may be increased by the Chief, Engineering and Manufacturing Branch, FAA Eastern Region, upon receipt of substantiating data through an FAA maintenance inspector.

This amendment is effective June 27, 1969.