AIRWORTHINESS DIRECTIVE
For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.
Rolls Royce Turbine Engines - Tay Series
AD/TAY/9 Ultrasonic Inspection of LP Compressor Rotor
Blades
11/2003
DM
Applicability: Rolls Royce Tay 650-15 and -15/10 series engines with serial numbers as listed in Rolls Royce Service Bulletin (SB) TAY-72-1591.
Requirement: 1. Unless previously accomplished, carry out a one-time inspection and test of the Low Pressure (LP) compressor rotor blades, and as necessary replace the LP compressor rotor blade set and disc, in accordance with the accomplishment instructions contained in Rolls Royce SB TAY-72-1591.
2. If any cracks were detected during the inspection/test required by Requirement 2, remove the complete LP compressor rotor blade set and disc.
Note: German LBA AD 1998-055/2 refers.
Compliance: For Requirement 1: Within 2 months following the effective date of this Directive.
For Requirement 2: Before further flight.
This Airworthiness Directive becomes effective on 17 September 2003.
Background: This Directive requires a one-off inspection and test of LP compressor rotor blades of particular engine serial numbers for which the manufacture has no record of shop visits or inspections/tests following issue of CAA (UK) AD 008-10-97 (subject of current AD/TAY/2 Amdt 1). The intent of this Directive is therefore to ensure all applicable engines, to which this Directive applies, are not operated with possibly cracked LP compressor rotor blades.
Rolls Royce Turbine Engines - Tay Series
AD/TAY/9 (continued)
As AD/TAY/2 Amdt 1 requires “repetitive inspections at every shop visit” of the engines, as contained in the Requirement document of that Directive, the Directive remains current and separate from this new Directive.
Jim Coyne
Delegate of the Civil Aviation Safety Authority 10 September 2003
The above AD is notified in the Commonwealth of Australia Gazette on 17 September 2003.