Commonwealth legislation

AD/RRT-S/9 - Transply Combustion Liners

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Commonwealth

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legislative instrument

Plain English Summary

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This airworthiness directive requires operators of Rolls‑Royce Spey Mk.555 engines fitted with Mod 6012 or Mod 6123 Transply combustors to replace those combustors per Rolls‑Royce Service Bulletin Sp72‑1001 before they reach 3,500 combustor hours since new (Requirement; Compliance). It cites service experience of circumferential cracking in the head and barrel sections and notes borescope inspection was unsatisfactory; operators bear replacement costs and must keep combustor‑hour records and schedule maintenance to comply (Background).

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AD/RRT-S/9 - Transply Combustion Liners

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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/9 Transply Combustion Liners 7/86

Applicability: Spey Mk. 555 Series engines fitted with Mod 6012 or Mod 6123 combustors. Requirement: Replace Mod 6012 or Mod 6123 combustors in accordance with Rolls Royce SB Sp

72-1001.

Compliance: Not later than 3,500 hours combustor time since new.

Background: This Directive has been issued to require replacement of Transply combustion liners.

Rolls Royce advise, service experience with Mod. 6012 standard combustors indicates Transply combustors are experiencing circumferential cracking in the head and barrel sections. Service experience with boroscope inspection of Transply combustors has proven unsatisfactory, therefore a life limit of 3,500 hours is required.

Source text

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