1AD/LTS/9 Amdt 2 - Number 3 and 4 Bearing Monitoring

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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AlliedSignal (Lycoming) Turbine Engines - LTS 101 Series

AD/LTS/9

Amdt 2

Number 3 and 4 Bearing Monitoring 9/96

Applicability: All LTS101 series engines not incorporating the requirements of CAO 106, AD/LTS/13.

Requirement: Monitor the condition of the number 3 and 4 bearings in accordance with the technical procedures detailed in FAA Airworthiness Directive 88-14-01, Paragraphs

(a) through (j).

Note: AlliedSignal (Formerly Textron Lycoming) Service Bulletins LT 101-72-40- 0103 Revision 3 and LT 101-77-30-0104 Revision 3 refer.

Compliance: Unless previously accomplished; as detailed in the requirement document with a revised effectivity date of 15 August 1996.

Background: The original issue of this Directive was issued to require the monitoring of the number 3 and 4 bearings for evidence of failure following advice of power turbine failure events. The requirement reflected FAA AD 87-26-10.

Amendment 1 was issued to reflect FAA AD 88-14-01 superseded the requirements of FAA AD 87-26-10. AD 88-14-01 alleviated the inspection and maintenance requirements of AD 87-26-10 and introduced alternate maintenance procedures.

This amendment introduces a terminating action. The requirements of this Directive are no longer applicable to engines incorporating the improved rotor retention capability and improved electronic power turbine rotor overspeed controller detailed in CAO 106, AD/LTS/13.

The original issue of this Airworthiness Directive became effective on 24 March 1988.

Amendment 1 of this Airworthiness Directive became effective on 6 October 1988.