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