Commonwealth legislation

AD/RB211/3 Amdt 2 - Speed and Temperature Governing System

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Commonwealth

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legislative instrument

Plain English Summary

3/10 complexity

This Airworthiness Directive requires operators of specified Rolls‑Royce RB211 engines to carry out a periodic maintenance test of the speed governing system (see Rolls Royce Service Bulletin RB.211‑73‑4305 Rev 6) to detect dormant failures that might prevent an overspeed response. The amendment removes the previous mandatory periodic test of the temperature governing function (Background). Operators must perform the test within 750 hours time in service and repeat it every 750 hours; operators bear the cost and CASA enforces compliance (Requirement, Compliance).

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AD/RB211/3 Amdt 2 - Speed and Temperature Governing System

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Rolls Royce Turbine Engines - RB211 Series

AD/RB211/3

Amdt 2

Speed and Temperature Governing System 10/99

Applicability: RB211 engines as detailed in Rolls Royce Service Bulletin Number RB.211-73-4305 Revision 6.

Requirement: To identify possible dormant failures within the speed and temperature governing system which may prevent response of the governing system to an overspeed; carry out a maintenance test of the speed governing system as described in the Aircraft Maintenance Manual, Chapter 73-21-00, Adjustment/Test. Rolls Royce Service Bulletin Number RB.211-73-4305 Revision 6 refers.

Note: The requirements of Rolls Royce Service Bulletin Number RB.211-73-4305 Revision 6 have been declared mandatory by the CAA (UK).

Compliance: Unless previously accomplished; within 750 hours time in service from the effective date of this directive and thereafter at intervals not to exceed 750 hours time in service.

This Amendment becomes effective on 7 October 1999.

Background: This directive was originally issued to require a periodic test of the speed and temperature governing system. The requirement reflected advice of a dormant failure could result in the governing system not responding to an overspeed or over temperature condition.

Amendment 1 was issued in June 1982 to include the RB211-524D4-19 model.

This amendment reflects the manufacturer’s latest revision to the requirement document. The revision, in part, deletes the requirement to carry out a periodic test of the temperature governing function. Automatic control of the temperature channel is no longer considered essential for the safe operation of the engine.

Amendment 1 of this Airworthiness Directive became effective 30 June 1982.

The original issue of this Airworthiness Directive became effective on 31 January 1982.

Source text

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

1 AD/RB211/3 Amdt 2 - Speed and Temperature Governing System