Commonwealth legislation

AD/RRT-S/7 - Airflow Control Bleed Valve - Removal of Mod. 5866

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Commonwealth

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legislative instrument

Plain English Summary

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This airworthiness directive requires specified Rolls‑Royce Spey engines fitted with Mod. 5866 to receive Rolls Royce Service Bulletin SP72‑964 (Modification 6040) at the next shop visit after 30 November 1983. It is intended to prevent power stagnation and excessive turbine gas temperature (TGT) excursions caused by bleed‑valve stiction. Operators and maintenance organisations must perform and pay for the modification before the engine is next installed; the directive supersedes AD/RRT‑S/6.

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AD/RRT-S/7 - Airflow Control Bleed Valve - Removal of Mod. 5866

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source Rolls Royce Turbine Engines - Spey Series

AD/RRT-S/7 Airflow Control Bleed Valve - Removal of Mod. 5866 11/83

Applicability: 511-5W, 511-8, 511-14, 511-14W, 555-15/555-15H/555-15N/555/15P. Featuring Mod. 5866 (SB Sp 72-916).

Requirement: Rolls Royce SB No. SP72-964 (Modification 6040).

Compliance: Before installation in an aircraft following next shop visit after 30th November 1983.

Background: Compliance with this Directive will supersede AD/RRT-S/6 which has been raised to alert operators of the possibilities of power stagnation and excessive TGT excursions associated with engine accelerations from low power settings.

Incorporation of modification 6040 should prevent these stagnations caused by bleed valve mechanism stiction.

Source text

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