Commonwealth legislation

AD/R22/38 Amdt 1 - Tail Rotor Gearbox Output Shaft Key

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

4/10 complexity

Mandates alignment marks, daily preflight checks for those marks, and physical verification of the tail-rotor gearbox input and output shaft keys on affected Robinson R22 helicopters. Verification may require disassembly of the gearbox. It applies to R22s with gearboxes manufactured or overhauled by Robinson before 8 June 1992; pilots/operators must perform and certify daily checks and arrange the required inspections because missing keys have led to gear slippage and at least one forced landing.

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/R22/38 Amdt 1 - Tail Rotor Gearbox Output Shaft Key.

AD/R22/38 Amdt 1 - Tail Rotor Gearbox Output Shaft Key

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source
Robinson R22 Series Helicopters

AD/R22/38

Amdt 1

Tail Rotor Gearbox Output Shaft Key 2/96

Applicability: All R22 helicopters fitted with a tail rotor gearbox that was overhauled or manufactured by Robinson Helicopter Company prior to 8 June 1992.

FAA AD 95-23-05 lists gearbox serial numbers that are exempt from the requirements of this AD.

Note: Copies of FAA AD 95-23-05 are available from CASA Airworthiness District Offices.

Requirement: 1. Unless previously accomplished in accordance with the requirements of the original issue of AD/R22/38, install alignment dots in accordance with the technical requirements of paragraph (a) of FAA AD 95-23-05.

2. Inspect for misalignment of the “alignment dots” in accordance with the technical requirements of paragraph (b) of FAA AD 95-23-05.

3. Verify the existence of both the input and output shaft keys in accordance with the technical requirements of paragraph (c) of FAA AD 95-23-05. This is terminating action for the daily preflight checks in Requirement 2.

Note: FAA AD 95-23-05 supersedes FAA AD 94-17-07.

Compliance: Effective date 1 February 1995;

Unless previously accomplished, before further flight.

2. Prior to the first flight of each day.

Note: The Pilot in Command may carry out and certify in the Maintenance Release for the daily preflight checks required by this Directive as part of the daily preflight inspection.

3. Within the next 100 hours time in service (TIS) after the effective date of this Directive or at the next annual inspection, whichever occurs first.

Background: The manufacturer has received reports of two tail rotor gearboxes which were assembled without the key required to prevent the output gear from rotating on the output shaft. In one case the slippage occurred on the ground while in the other case a forced landing, which damaged the helicopter, resulted.

This amendment requires the additional action to disassemble the tail rotor gear box assembly in order to verify the installation of the key.

Source text

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

1 AD/R22/38 Amdt 1 - Tail Rotor Gearbox Output Shaft Key