Commonwealth legislation

AD/PHS/8 - Counterweight Bearing Shaft - Inspection

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This Act has been repealed and is no longer in force. It is retained for historical reference.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 and maintenance personnel of aircraft with Hamilton Standard variable‑pitch propellers (models 2D30, 3D40, 12D40) to inspect counterweight bearing shafts for specific manufacturer marks and verify proper heat treatment by Rockwell C hardness testing. Shafts bearing the marks that fail the hardness range must be removed and replaced. The rule (original compliance within 100 flight hours after 15 Feb 1966) prevents shaft failure and loss of propeller control.

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Current sections

Direct links to the current provisions in AD/PHS/8 - Counterweight Bearing Shaft - Inspection.

AD/PHS/8 - Counterweight Bearing Shaft - Inspection

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Propellers - Variable Pitch - Hamilton Standard

AD/PHS/8 Counterweight Bearing Shaft - Inspection 12/65

Applicability: All model 2D30, 3D40 and 12D40.

Requirement: 1. Remove the propeller counterweight cap, counterweight adjusting screw and nuts.

2. Remove grease from head of shaft P/N 53546.

3. Examine head of shaft for all of the following marks: “53546J”, “XLO” (contained in an oval stamp) and “SK”.
4. Remove any shaft so marked for hardness testing. The shaft should be 26.6 to 32.6 Rockwell “C” scale. Any shaft not meeting this figure shall be rejected.

Note: To facilitate examination of the shaft head remove split pin locking the shaft and rotate shaft with Allen key.

or AD/PHAM/1.

Compliance: Within 100 hours time in service after 15 February 1966.

Source text

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

1 AD/PHS/8 - Counterweight Bearing Shaft - Inspection