Overhaul Life Development, and Early Failure Detection of Aircraft Gas Turbines: A Description of the Methods By Which Scheduled and Unscheduled Engine Removals May Be Minimized Based on the Techniques Adopted by Trans‐Canada Airlines for Use with Rolls‐Royce Tyne, Conway and Dart Engines

Inspection of the engine oil pressure filter at regular intervals has been the mainstay of maintenance procedures with respect to declaring an engine unserviceable. The procedure generally consists of draining the cavity of the filter, removing the filter cover and withdrawing the filter. The filter is examined and on occasion washed over a cloth to examine more closely the particles. When this examination is completed, a decision is made in respect to the serviceability of the engine and the particles are thrown away. A survey of results achieved by only relying on a standard filter inspection shows that this method leaves a great deal to be desired.