Commonwealth legislation

AD/DC4/37 - Spar Web - Inspection

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

4/10 complexity

This instrument mandates inspection of the spar web on all Douglas DC‑4 series aircraft via the quick‑opening underside wing/centre‑section doors to detect loose rivets, cracks, seam defects and fuel leakage, and requires repairs if defects are found.

Aircraft owners/operators must perform the work and follow the specified Douglas drawings or the listed regulatory/FAA methods for repairs, bearing the cost and constrained to those approved repair pathways unless an alternate method is authorised.

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AD/DC4/37 - Spar Web - Inspection

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Douglas DC4 Series Aeroplanes

AD/DC4/37 Spar Web - Inspection NK

Applicability: All models.

Requirement: 1. Inspect the spar web structure in accordance with the following procedure:-

1.1. Open the quick-opening type inspection doors in the bottom of the outer wing and centre section surfaces forward of the front spar and aft of the centre spar.

1.2. Inspect the spar web structure for loose rivets, cracks, seam defects and other irregularities, particular attention being paid to signs of fuel leakage.

2. Repair cracks in the spar web which occur in the area covered by Douglas SB No. (C54)205, or in any other area of the spar, in accordance with the following Douglas Drawings:-

5354811 “Service Rework - Station 463, Outer Wing, Centre Spar” 3344236 "Repair - Integral Tank Spar Web Cracks”; or

ANOs Part 100, Appendix “A” Notice No. 7/25; or FAA AD 47-27-2; or

ANO 105.1.16.2.6.6.

Source text

Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.

1 AD/DC4/37 - Spar Web - Inspection