Commonwealth legislation

AD/CFM56/13 - Accessory Gear Box - Starter Gear Replacement

In ForceCTH

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Commonwealth

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legislative instrument

Plain English Summary

3/10 complexity

This airworthiness directive requires replacement of the starter gear (line 5) in the accessory gearbox of specified CFMI CFM56-3, -3B and -3C engines, following CFMI Service Bulletin 72-877 Revision 1. It affects operators of Boeing 737 and other aeroplanes fitted with those engines, who must schedule the work by the directive's staged compliance dates to reduce the risk of in‑flight engine shutdowns.

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AD/CFM56/13 - Accessory Gear Box - Starter Gear Replacement

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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CFM International Turbine Engines - CFM56 Series

AD/CFM56/13 Accessory Gear Box - Starter Gear Replacement

10/98

Applicability: CFM International (CFMI) CFM56-3, -3B and -3C model turbofan engines identified and listed in Table 1 of CFMI Service Bulletin 72-877 Revision 1 and installed on Boeing 737 and other aeroplanes.

Requirement: Replace the starter gear (line 5) in the accessory gearbox (AGB) of applicable engines in accordance with CFMI Service Bulletin 72-877 Rev 1.

Note: DGAC 98-198(B)R1 dated 01 July 1998 refer.

Compliance: 1. For aircraft with two applicable engines fitted, perform above requirement on one engine before 1 October 1998.

For aircraft which have only one applicable engine, perform above action before 1 February 1999.

This airworthiness directive becomes effective on 29 July 1998.

Background: Two in flight shut downs were experienced due to a failure of the starter gear (line5) in the AGB.

Source text

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

1 AD/CFM56/13 - Accessory Gear Box - Starter Gear Replacement