AD/ALF/14 Amdt 3 - Engine Oil System Health Monitoring (Cth)

AIRWORTHINESS DIRECTIVE For the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/ALF/14 Amdt 2 and issues the following AD under subregulation 39.1 (1) of CAR 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.

AlliedSignal (Lycoming) Turbine Engines - ALF502 and LF507 Series

AD/ALF/14 Amdt 3

Engine Oil System Health Monitoring 8/2001

Applicability: AlliedSignal ALF 502L, ALF502R, and LF507 series engines installed in Canadair CL-600, BAe 146, and Avro RJ series aircraft.

Requirement: 1. Carry out oil system health monitoring in accordance with AlliedSignal Service Bulletins (SB) LF 507-1H 79-5, LF507-1F 79-5, ALF502L 79-0171, and ALF502R 79-9 for LF507-1H, -1F, ALF502L and ALF502R series engines as appropriate.

Where the service bulletins require:

(a) magnetic chip detector (MCD) debris be left to accumulate on the detector for assessment of a debris accumulation rating, it is permissible to remove the MCD debris for material analysis provided a record of debris accumulation is kept for subsequent assessment per the service bulletin requirements,

(b) a scavenge oil temperature check be carried out, it is permissible to use the procedures specified in the respective aircraft maintenance manuals in lieu of those specified in the service bulletins.