1AD/HU 269/89 - Droop Stop Nut

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Schweizer (Hughes) 269 Series Helicopters

AD/HU 269/89 Droop Stop Nut 2/88 DM

Applicability: All Model 269 series Helicopters.

Requirement: 1. Carry out a visual inspection of the droop stop nut (P/N 269A1340) for indications of cracking in accordance with Part I of Schweizer Service Information Notice No. N-213.

2. Carry out a dye penetrant inspection of the droop stop nut (P/N 269A1340) for cracking in accordance with Part II of Schweizer SIN No. N-213.

Compliance: a. As detailed in Requirement 1 not later than at each Daily Inspection after 17 December 1987, until Requirement 2 is accomplished.

Note: The visual inspection may be accomplished by the pilot in command, in which case the precise AD reference shall be entered in a certification made on the Maintenance Release coincident with that for the Daily Inspection.

b. As detailed in Requirement 2 within 100 hours time in service after 31 December 1987 or prior to 31 March 1988, whichever occurs first.

c. As detailed in Requirement 2 prior to the installation of droop stop nuts held in spares inventory at 29 September 1987.

Background: Reports received by the manufacturer indicate the possibility of cracking and failure of the droop stop nut. A one-time dye penetrant inspection of the subject nut constitutes terminating action.