AD 77-17-01

77-17-01 CANADAIR: Amendment 39-3007. Applies to all CL-44D4 and CL-44J airplanes, certificated in all categories, that have not been altered in accordance with Canadair Service Information Circular No. 151-CL44, Issue 3, dated October 26, 1976, or with an FAA- approved equivalent alteration.

Compliance required as indicated.

(a) To ensure the structural integrity and prevent failure of the following nose landing gear upper radius rods, accomplish the inspection in (1).

Upper Radius Rod Subassembly Upper Radius Rod Item 1. 44-85045 LH Assembly Employs 44-85084 LH Rod Item 2. 44-85045-1 RH " " 44-85084-1 RH Rod Item 3. 44-85045-1000 LH " " 44-85084-2 LH Rod

(1) For parts which have accumulated 1175 or more landings on the effective date of this airworthiness directive, inspect Items 1, 2, and 3 within the next 75 landings by a dye penetrant, eddy current, or ultrasonic method in accordance with the "Inspection Data" and "Inspection Procedure" sections of Canadair Service Information Circular No. 151-CL44, Issue 3, dated October 26, 1976, or with an FAA-approved equivalent inspection.

(2) For parts which have not accumulated 1175 landings on the effective date of this airworthiness directive, accomplish the inspection in (a)(1) before attaining 1250 landings.

(b) Repeat inspections in (a)(1) at intervals not to exceed:

(1) 60 landings for non-reworked parts Item 1 and 3

(2) 200 landings for non-reworked part Item 2

(3) 30 landings for reworked parts Item 1, 2, and 3

(c) Replace cracked parts with new parts of the same part number or with approved equivalent parts, or rework cracked parts to the limitations specified in "Rework Instruction" in Canadair Service Information Circular No. 151-CL44, Issue 3, dated October 26, 1976, or with an approved equivalent procedure.

(d) Replace parts reworked to the maximum limits, specified in "Rework Instruction" in theabove Service Information Circular, that have attained an additional 3000 landings from the time of such rework, or when cracks are again detected, whichever occurs first, with new parts of the same part number or with approved equivalent parts.

(e) Equivalent inspections/procedures and parts must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region.

(f) Upon submission of substantiating data by an owner or operator through an FAA Maintenance Inspector, the Chief, Engineering and Manufacturing Branch, FAA, Eastern Region, may adjust the inspection times specified in this AD.

This amendment is effective August 18, 1977.