Commonwealth legislation

AD/DH114/29 Amdt 1 - Main Undercarriage - Main and Damper Jack Bolts - Inspection and Modification

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Commonwealth

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legislative instrument

Plain English Summary

4/10 complexity

Mandates removal and magnetic-particle inspection of the main and damper jack attachment bolts on DH114 (Heron) Series 2 aircraft, and requires incorporation of Modification No.1536 for bolts P/No. 14-2U.299. It sets initial and recurring inspection intervals (150–300 hours depending on prior inspection) and a 2400‑hour interval after modification for bolts P/No. 14-2U.631. Operators must perform the inspections, fit the modification where required, and schedule recurring checks under the stated time limits.

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Direct links to the current provisions in AD/DH114/29 Amdt 1 - Main Undercarriage - Main and Damper Jack Bolts - Inspection and Modification.

AD/DH114/29 Amdt 1 - Main Undercarriage - Main and Damper Jack Bolts - Inspection and Modification

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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DH114 (Heron) Series Aeroplanes

AD/DH114/29

Amdt 1

Main Undercarriage - Main and Damper NK Jack Bolts - Inspection and Modification

Applicability: All Series 2 aircraft.

Requirement: Inspect the attachment bolts at each end of the damper jack and at the top of the main jack for fatigue cracking as follows:

For aircraft fitted with attachment bolts P/No. 14-2U.299:-

(a) Remove the bolts and inspect for cracking around the centre grease hole using a magnetic particle method.

(b) Incorporate Modification No. 1536.

2. For aircraft fitted with attachment bolts P/No. 14-2U.631:-

Remove the bolts and inspect for cracking around the centre grease hole using a magnetic particle method.

Compliance: For Para. 1:

(a) For aircraft inspected in accordance with the previous issue of this Directive \- within 300 hours time in service from the previous inspection; and

For all other aircraft - within 150 hours time in service after 31 May 1972; and

For all other aircraft - thereafter at intervals not exceeding 300 hours time in service.

(b) Before 31 December 1972\. For Para. 2:

Within 2400 hours time in service after the incorporation of modification 1536 and thereafter at intervals not exceeding 2400 hours time in service.

Source text

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

1 AD/DH114/29 Amdt 1 - Main Undercarriage - Main and Damper Jack Bolts - Inspection and Modification