Service Instruction No. 1500

DATE: January 11, 2001

MODELS AFFECTED

All O-540-F1B5 model engines installed in Robinson R-44 helicopters.

TIME OF COMPLIANCE

At overhaul.

Textron Lycoming has revised the counterweight tuning to lessen vibration characteristics for the O-540- F1B5 model engine installed in those Robinson R-44 helicopter which use the new Robinson fanshaft P/N C007-5.

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Service Instructions
Counterweight Roller Change for Robinson Helicopter
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