Service Bulletin No. 656

REPLACEMENT OF 6-CYLINDER ELECTRONIC IGNITION SYSTEM (EIS)

DATE:

February 13, 2024

MODELS AFFECTED:

O-540-F1B5 and IO-540-AE1A5 engines equipped with EIS used in Robinson R44 applications

TIME OF COMPLIANCE:

For Engines with the Original EIS: Before further flight for engines with more than 100 hours Time-In-Service on the EIS. For Engines with more than 50 hours, but less than 100 hours Time-In-Service on the EIS: Within the next 10 hours of operation. For Engines with a replacement EIS: Not to exceed 50 hours Time-In-Service on the EIS.