Commonwealth legislation

AD/R22/4 Amdt 7 - Retirement Lives - Fatigue Critical Components

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This Act has been repealed and is no longer in force. It is retained for historical reference.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

2/10 complexity

What this does

This Airworthiness Directive (safety rule) applies to all Robinson R22 helicopters.

The core requirement: Owners and operators must permanently retire (replace) specific helicopter parts before they exceed their 'fatigue life' limits. These time limits are listed in the manufacturer's Maintenance Manual (Revision 14), Section 3, Table 3-1.

Key details:

Fatigue critical components are parts that weaken from repeated vibration and flight stresses—if used too long, they can snap or fail catastrophically
You must calculate 'time in service' using the method in Paragraph 3.002 of the manual
Critical exception: Main rotor blades with part number A016-1 and serial numbers 1 through 810 are banned entirely—they cannot be used even if they haven't reached their time limit

Why it matters: This prevents crashes caused by metal fatigue. By forcing replacement of worn parts before they break, the rule keeps the helicopter safe to fly.

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Current sections

Direct links to the current provisions in AD/R22/4 Amdt 7 - Retirement Lives - Fatigue Critical Components.

AD/R22/4 Amdt 7 - Retirement Lives - Fatigue Critical Components

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source Robinson R22 Series Helicopters

AD/R22/4

Amdt 7

Retirement Lives - Fatigue Critical Components 7/95

Applicability: All Models.

Requirement: Retire from service all components listed in Robinson Helicopter Company R22 Maintenance Manual (MM), Revision 14, Section 3, Table 3-1, Fatigue Limited Parts, at or before the times specified therein. Time in service shall be computed in accordance with Paragraph 3.002 of the MM.

Note: Main rotor blades P/N A016-1 S/N 1 to 810 are not eligible for service.

Compliance: This Amendment is effective 22 June 1995.

Background: This Directive requires compliance with the manufacturer’s life limitation schedule for the aircraft. This Amendment reflects the latest revision of the R22 Maintenance Manual.

Source text

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