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.

Counterweight Roller Change for Robinson Helicopter
CTA Heading: 
Get It Exchanged
CTA Description: 
Use our Engine Exchange Program to order a new, rebuilt, or overhauled engine to experience more airtime and less downtime.
Background Color: 
Contact Usnode/43Technical Support
https://www.lycoming.com/sites/default/files/Counterweight%20Roller%20Change%20for%20Robinson%20Helicopter.pdf