Commonwealth legislation

AD/TAY/4 - Fuel Flow Regulator Life Limit

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

The directive mandates removal and rework, per Rolls‑Royce Service Bulletin TAY‑73‑1459, of specified Rolls‑Royce Tay fuel‑flow regulators listed by serial number, at intervals not exceeding 6,500 hours TIS. It aims to prevent FFR drive‑gear failures linked to contaminated fuel.

Affected parties are aircraft operators and maintenance organizations; operators must track hours, schedule removals, and pay for downtime and rework, while maintenance providers perform the prescribed service.

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Current sections

Direct links to the current provisions in AD/TAY/4 - Fuel Flow Regulator Life Limit.

AD/TAY/4 - Fuel Flow Regulator Life Limit

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 - Tay Series

AD/TAY/4 Fuel Flow Regulator Life Limit 7/99

Applicability: Rolls Royce Tay fuel flow regulators listed by serial number in RR Service Bulletin TAY-73-1459.

Requirement: Remove from service applicable fuel flow regulators for rework as in Rolls Royce Service Bulletin TAY-73-1459.

Note: UK CAA AD 002-01-99 also refers.

Compliance: At a period not exceed 6500 hours time in service since new or last overhaul.

This Airworthiness Directive becomes effective on 15 July 1999.

Background: Rolls Royce has advised a number of fuel flow regulators in a foreign operator’s fleet have been exposed to contaminated fuel. FFR drive gear failures have been attributed to using contaminated fuel. Limiting the time in service will prevent FFR failure due to excessive gear wear.

Source text

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

1 AD/TAY/4 - Fuel Flow Regulator Life Limit