Commonwealth legislation

AD/DH 82/1 - Undercarriage Strut - Modification

RepealedCTH

This Act has been repealed and is no longer in force. It is retained for historical reference.

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

4/10 complexity

This mandatory safety order requires owners/operators of DH 82 Tiger Moth aircraft to take immediate action to prevent undercarriage collapse: replace the lower fork end fitting with a specified stronger steel part, modify the lower fork bolt per drawings, use 3/16" BSS S2 rivets (including replacing upper retaining sleeve rivets), and fit a safety cable as a backup.

Affected: pilots, owners, and maintenance engineers. Work must be done forthwith (before the next flight) or by complying with ANO 105.1.14.5.5.1.

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Current sections

Direct links to the current provisions in AD/DH 82/1 - Undercarriage Strut - Modification.

AD/DH 82/1 - Undercarriage Strut - Modification

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DH 82 (Tiger Moth) Series Aeroplanes

AD/DH 82/1 Undercarriage Strut - Modification NK

Applicability: All models.

Requirement: 1. Replace the lower fork end fitting P/N 45491 and DHA 2185 with a steel fitting in accordance with Figure 3 of this Directive, or with steel fitting P/N DHA 2195 obtainable from De Havilland Aircraft Pty. Ltd., Bankstown, New South Wales.

2. Modify the lower fork bolt P/N H24060 in accordance with Figure 4 of this Directive.

3. Attach this fitting to the centre tube with 3/16 in. diameter rivets of BSS S2 material in accordance with Figure 1 of this Directive.

4. Replace the rivets attaching the upper retaining sleeve P/N 62814 with rivets of BSS S2 material.

5. To prevent the moving portion of the landing gear from becoming disengaged from the fixed portion in the event of failure of the rivets attaching the retaining sleeve to the centre tube, install a check cable in accordance with Figure 2 of this Directive; or

6. ANO 105.1.14.5.5.1.

Compliance: Forthwith.

Figure 1.

View image in the official source

Figure 2.

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Figure 3.

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Figure 4.

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Source text

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

1 AD/DH 82/1 - Undercarriage Strut - Modification

DH 82 (Tiger Moth) Series Aeroplanes

AD/DH 82/1 Undercarriage Strut - Modification NK

Applicability: All models.

2. Modify the lower fork bolt P/N H24060 in accordance with Figure 4 of this Directive.

3. Attach this fitting to the centre tube with 3/16 in. diameter rivets of BSS S2 material in accordance with Figure 1 of this Directive.

4. Replace the rivets attaching the upper retaining sleeve P/N 62814 with rivets of BSS S2 material.

5. To prevent the moving portion of the landing gear from becoming disengaged from the fixed portion in the event of failure of the rivets attaching the retaining sleeve to the centre tube, install a check cable in accordance with Figure 2 of this Directive; or

6. ANO 105.1.14.5.5.1.

Compliance: Forthwith.

Figure 1.

Figure 2.

Figure 3.

Figure 4.