Commonwealth legislation

AD/DH114/37 Amdt 1 - Main Undercarriage Damper Ram - Inspection

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

This AD applies to DH114 Series 2 (Heron) aeroplanes: operators must at each daily/overnight inspection check that the main undercarriage damper ram’s lower attachment bolt “turns easily” with a spanner and replace any ram that fails before further flight. It also requires that units P/N AC 11164 be modified per Dunlop SB No. 32‑824 or replaced with P/N A/C 65528 by the directive’s compliance date. It affects owners, operators and maintenance providers and aims to prevent rams becoming internally pressurised and seizing the bolt.

JSON API

Deep dive

Want the full deep dive?

Zoe can write the in-depth analysis on top of the summary above: how it works, who it affects and what each part actually does.

Current sections

Direct links to the current provisions in AD/DH114/37 Amdt 1 - Main Undercarriage Damper Ram - Inspection.

AD/DH114/37 Amdt 1 - Main Undercarriage Damper Ram - Inspection

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source
DH114 (Heron) Series Aeroplanes

AD/DH114/37

Amdt 1

Main Undercarriage Damper Ram - Inspection NK

Applicability: All Series 2 aircraft.

Requirement: 1. Check that the lower attachment bolt of the damper ram can be turned easily in situ using a spanner. If the bolt cannot be easily turned the ram shall be replaced with a serviceable unit before further flight.

Note: Experience has shown that an unserviceable ram becomes internally pressurised and exerts sufficient end load to make bolt turning extremely difficult or impossible.

Replace existing damper rams P/N AC 11164 with units of same P/N modified in accordance with Dunlop SB No. 32-824 or new damper rams P/N A/C 65528.

Compliance: For Para. 1 - At each daily or overnight inspection until modified or replaced in accordance with Hawker TNS No. U.15, Issue 2.

For Para. 2 - Before 1 July 1974.

Source text

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

1 AD/DH114/37 Amdt 1 - Main Undercarriage Damper Ram - Inspection