Commonwealth legislation

AD/ROTAX/9 - Propeller Gearbox Inspection

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

This AD requires owners/operators of specified Rotax 912A, 912F and 914F engines and listed replacement gearboxes to inspect—and, if necessary, replace—the propeller gearbox following Rotax Service Bulletin instructions. The Civil Aviation Safety Authority (CASA) issued the directive; operators bear the inspection and replacement costs and must comply within 30 flight hours or by 30 November 2000 (Applicability; Requirement; Compliance; Background). It responds to a possible incompatible dog‑hub/dog‑gear combination.

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AIRWORTHINESS DIRECTIVE

View image in the official source

View image in the official source
For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

AD/ROTAX/9 Propeller Gearbox Inspection

AD/ROTAX/9 Propeller Gearbox Inspection 8/2000

Applicability: All Rotax 912A engines S/N 4,410.330 through 4,410.366 inclusive, 912F engines S/N 4,412.781 through 4,412.791 inclusive, 914F engines S/N 4,420.128 through 4,420.156 inclusive and gearboxes supplied as replacement parts S/N 15081, 15139, 15341, 15559, 15560, 15561 or 15562.

Note 1: The stated engines and gearboxes are only affected if the dog hub, overload clutch or gearbox, for affected engines, have never been replaced.

Requirement: Inspect and if necessary, replace the gearbox, in accordance with Rotax Service Bulletin SB-912-027 Revision 1 or SB-914-010, Revision 1, as applicable, both dated February 2000.

Note 2: Austro Control (Austria) AD No 101 refers.

Compliance: Unless previously accomplished, within 30 hours time in service or prior to 30 November 2000, whichever comes first.

This Airworthiness Directive becomes effective on 10 August 2000.

Background: The manufacturer has advised that a combination of 7 degrees tapered dog hub and 30 degrees backlash dog gears may have been combined in the gearbox of affected engines or replacement gearboxes.

Signature of Eugene Paul Holzapfel Delegate of the Civil Aviation Safety Authority

Eugene Paul Holzapfel

Delegate of the Civil Aviation Safety Authority 27 June 2000

View image in the official source

The above AD is notified in the Commonwealth of Australia Gazette on 12 July 2000.

Source text

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

AIRWORTHINESS DIRECTIVE AIRWORTHINESS DIRECTIVE

AIRWORTHINESS DIRECTIVE

For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

AD/ROTAX/9 Propeller Gearbox Inspection AD/ROTAX/9 Propeller Gearbox Inspection 8/2000

AD/ROTAX/9 Propeller Gearbox Inspection 8/2000

Note 1: The stated engines and gearboxes are only affected if the dog hub, overload clutch or gearbox, for affected engines, have never been replaced.

Requirement: Inspect and if necessary, replace the gearbox, in accordance with Rotax Service Bulletin SB-912-027 Revision 1 or SB-914-010, Revision 1, as applicable, both dated February 2000.

Note 2: Austro Control (Austria) AD No 101 refers.

Compliance: Unless previously accomplished, within 30 hours time in service or prior to 30 November 2000, whichever comes first.

This Airworthiness Directive becomes effective on 10 August 2000.

Eugene Paul Holzapfel

Delegate of the Civil Aviation Safety Authority 27 June 2000

The above AD is notified in the Commonwealth of Australia Gazette on 12 July 2000.