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AWB 85-025 Issue 4 - Robinson R22/R44 Engine Intake Valve and Valve Seat Distress

Published date: 
7 March 2019
Effective date: 
March 2019

This AWB is published to advise owners, registered operators, pilots, maintenance organisations and Licensed Aircraft Maintenance Engineers of the increasing incidence of intake valve and valve seat distress, caused by intake valve deposit build-up likely occurring during extended ground operations in elevated ambient temperatures.

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