Commonwealth legislation

AD/BELL 205/71 - Main Rotor Tension-Torsion Strap

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legislative instrument

Plain English Summary

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This Airworthiness Directive requires owners/operators of Bell 205A, 205A-1 and 205B helicopters with specified main rotor tension‑torsion (TT) straps to remove and replace any such strap that has reached 1,200 hours total time‑in‑service or 24 months since initial installation, whichever comes first, and to insert that life limit into the maintenance manual (Requirement; Compliance). The CASA delegate set the rule to prevent TT strap failure and loss of a main rotor blade; operators pay for replacements, must track strap time/age, and must comply before further flight (Background; Compliance).

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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.

Bell Helicopter Textron 205 Series Helicopters

AD/BELL 205/71 Main Rotor Tension-Torsio

AD/BELL 205/71 Main Rotor Tension-Torsion Strap 1/2003

Applicability: Model 205A, 205A-1, and 205B helicopters, with main rotor tension-torsion (TT) strap, part number 204-012-122-1, -5, or 214-010-179-1, installed.

Requirement: Remove and replace any TT strap with 1,200 hours total time in service or 24 or more months since initial installation on any helicopter, whichever occurs first.

This Directive revises the Limitations section of the maintenance manual by establishing a life limit for TT straps, part number 204-012-122-1, -5, or 214-010- 179-1, of 1,200 hours total time in service or 24 months since initial installation on any helicopter, whichever occurs first.

Note: FAA AD 2002-22-14 Amdt 39-12941 refers.

Compliance: Before further flight after 27 November 2002, unless already accomplished.

This Airworthiness Directive becomes effective on 27 November 2002.

Background: The original FAA AD requirement (AD 80-17-09) was prompted by an offshore accident of a Model 212 helicopter in which a TT strap reportedly failed in- flight after 2,140 hours total time in service, with resulting loss of the main rotor blade. This Directive restates the requirements AD 80-17-09, establishes a life limit for TT straps by revising the Limitations section of the maintenance manual, and adds Models 205A and 205B helicopters to the applicability. The actions required by this

Directive are intended to prevent failure of a TT strap, loss of a main rotor blade, and subsequent loss of control of the helicopter.

Signature of David Alan Villiers, Delegate of the Civil Aviation Safety Authority

David Alan Villiers

Delegate of the Civil Aviation Safety Authority 22 November 2002

The above AD is notified in the Commonwealth of Australia Gazette on 27 November 2002.

Source text

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

AIRWORTHINESS DIRECTIVE AIRWORTHINESS DIRECTIVE