Commonwealth legislation

AD/PHZL/70 - Hard Alloy Blades - Removal

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Commonwealth

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legislative instrument

Plain English Summary

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This Airworthiness Directive requires owners/operators of Mitsubishi MU-2 aeroplanes fitted with specified Hartzell HC‑B3TN‑5( ) hard‑alloy propeller blades to remove and replace those blades in accordance with Hartzell Service Bulletin HC‑SB‑61‑250 Revision 1, within 200 flight hours or 12 months. CASA states the replacement is to reduce blade failures from intergranular corrosion that can cause severe aircraft damage and loss of control.

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AIRWORTHINESS DIRECTIVE

View image in the official source

View image in the official source
For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

Propellers - Variable Pitch - Hartzell

AD/PHZL/70 Hard Alloy Blades - Removal 4

AD/PHZL/70 Hard Alloy Blades - Removal 4/2003

Applicability: Hartzell Propeller Inc. model HC-B3TN-5( ) propellers, with part numbers (P/N’s) T10176H(B)-5, T10176H(K)-5, T10176H-5, T10178H-11, T10178H-11R,

T10178H(B)-11, and T10178H(B)-11R blades that are installed on Mitsubishi Heavy Industries, Ltd MU-2 series aeroplanes.

Requirement: Remove and replace propeller blades in accordance with paragraphs 3.A. through 3.C.(3) of the accomplishment instructions of Hartzell Propeller Inc. Service Bulletin HC-SB-61-250, Revision 1.

Note: FAA AD 2003-04-23 Amendment 39-13072 refers.

Compliance: Within 200 flight hours or 12 months from the effective date of this directive, whichever occurs first.

This Airworthiness Directive becomes effective on 17 April 2003.

Background: Certain hard alloy blades installed on Mitsubishi MU-2 aircraft have a history of blade failure. Replacement of the blades listed in this directive will reduce the likelihood of blade failure by replacement with a blade with greater resistance to intergranular corrosion. Failure of the blade can lead to severe damage to the aeroplane and subsequent loss of control of the aeroplane.

Signature of James Coyne, Delegate of the Civil Aviation Safety Authority.

James Coyne

Delegate of the Civil Aviation Safety Authority 5 March 2003

View image in the official source

The above AD is notified in the Commonwealth of Australia Gazette on 26 March 2003.

Source text

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

AIRWORTHINESS DIRECTIVE AIRWORTHINESS DIRECTIVE

AIRWORTHINESS DIRECTIVE

For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

Propellers - Variable Pitch - Hartzell

AD/PHZL/70 Hard Alloy Blades - Removal 4 AD/PHZL/70 Hard Alloy Blades - Removal 4/2003

AD/PHZL/70 Hard Alloy Blades - Removal 4/2003

Applicability: Hartzell Propeller Inc. model HC-B3TN-5( ) propellers, with part numbers (P/N’s) T10176H(B)-5, T10176H(K)-5, T10176H-5, T10178H-11, T10178H-11R,

T10178H(B)-11, and T10178H(B)-11R blades that are installed on Mitsubishi Heavy Industries, Ltd MU-2 series aeroplanes.

Note: FAA AD 2003-04-23 Amendment 39-13072 refers.

Compliance: Within 200 flight hours or 12 months from the effective date of this directive, whichever occurs first.

This Airworthiness Directive becomes effective on 17 April 2003.

James Coyne

Delegate of the Civil Aviation Safety Authority 5 March 2003

The above AD is notified in the Commonwealth of Australia Gazette on 26 March 2003.