Commonwealth legislation

AD/F27/62 Amdt 2 - Godfrey Engine Driven Cabin Supercharger Drive Quill Shaft - Modification

RepealedCTH

This Act has been repealed and is no longer in force. It is retained for historical reference.

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

This Airworthiness Directive requires owners/operators of Fokker F27 aircraft to modify the quill shaft that drives the cabin supercharger so its shear-neck section meets a precise diameter, corner radius and surface finish (or alternatively be shot-peened to an approved standard).

It targets fatigue/failure risk in the drive system that could damage the engine or cause loss of cabin pressurization; compliance was required before 23 January 1970 (historical directive).

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AD/F27/62 Amdt 2 - Godfrey Engine Driven Cabin Supercharger Drive Quill Shaft - Modification

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source Fokker F27 Series Aeroplanes

AD/F27/62

Amdt 2

Godfrey Engine Driven Cabin Supercharger Drive Quill Shaft - Modification

1/70

Applicability: All models.

Requirement: Modify the cabin supercharger drive quill shafts as follows:

Rework the shear neck diameter to a reduced outside diameter of 0.380+0/-0.003 inches and ensure shear neck radius is 0.375 inches and surface finish is retained at 32 micro inches RMS.

Note: As an alternative to retaining a surface finish of 32 micro inches RMS, it is acceptable to evenly shot peen the reworked surface by an approved method for the purposes of improving fatigue characteristics of the quill.

Compliance: Before 23 January 1970.

Source text

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