Commonwealth legislation

AD/B75/1 Amdt 2 - Wing Spars

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Commonwealth

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legislative instrument

Plain English Summary

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Requires removal of the centre fuel tank and inspection of both front and rear wing spars for cracks, checks and warping at each annual inspection unless the tank gap is sealed (Note 1) or an approved fabric-covering modification permits inspection without tank removal (Note 3). Defective spars must be repaired or replaced in accordance with the US Civil Aeronautics Manual 18 and all drain holes must be open.

Applies to all Boeing 75 series aeroplanes. The stated purpose is to align this directive with the Country of Origin (FAA) requirements; compliance and repair costs fall to aircraft owners/operators and approved repair methods are required.

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AD/B75/1 Amdt 2 - Wing Spars

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source Boeing 75 Series Aeroplanes

AD/B75/1

Amdt 2

Applicability: All model 75 series.

Wing Spars 10/92

Requirement: Remove the centre fuel tank and inspect both front and rear spars for cracks, checks, and warping. Defective spars should be replaced or repaired in accordance with US Civil Aeronautics Manual 18. Ascertain that all drain holes are open.

Note 1. Repeated removal of the tank at each annual inspection is not necessary, if after accomplishment of the items mentioned above, the gap between the fuel tank and the upper surface of the centre section is sealed by doping on grade A fabric tape, or equivalent sealing means, to prevent moisture entering the tank compartment.

Note 2. FAA AD 50-06-02 refers.

Note 3. Modification of centre section fabric covering in accordance with Old Aeroplane Company Ltd Drawing No 001, or similar approved scheme will allow inspection without fuel tank removal; if applicable.

Compliance: At each annual inspection, unless the criteria mentioned in Requirement Note 1 is accomplished.

The compliance of the previous issue of this Directive was the period as stated. This amendment is effective from 17 September 1992.

Background: Country of Origin AD. Amendment 1 was issued to allow approved modification of fabric covering to expedite spar inspections.

Amendment 2 is issued to align this Directive more specifically with the relevant Country of Origin Directive requirements.

Source text

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