SYNCHROSCOPE INDICATOR, ENG/PROP (P/N 50-389091) - As Removed, Serviceable

The 50-389091 is a cockpit synchroscope indicator for engine and propeller synchronization on twin-engine aircraft. This instrument displays the relative RPM difference between engines, allowing pilots to manually synchronize propeller speeds or verify automatic sync system operation. Mounted on the instrument panel, the synchroscope needle indicates when engines are matched or shows which engine requires adjustment.

Commonly installed on Beechcraft King Air 90 series aircraft, this indicator is essential for smooth operation and reduced vibration during cruise flight. Installation and testing must follow the aircraft maintenance manual and Illustrated Parts Catalog specifications.

What is the SYNCHROSCOPE INDICATOR, ENG/PROP (P/N 50-389091)?

The 50-389091 is a cockpit synchroscope indicator for engine and propeller synchronization on twin-engine aircraft. This instrument displays the relative RPM difference between engines, allowing pilots to manually synchronize propeller speeds or verify automatic sync system operation.

Is the 50-389091 calibrated and ready to install?

Calibration status depends on the condition. Overhauled instruments come fully calibrated with an 8130-3 tag. The SYNCHROSCOPE INDICATOR, ENG/PROP is available in: As Removed, Serviceable. Contact us to confirm calibration status for your selected condition.

Can the 50-389091 be used as a direct replacement in my aircraft?

The SYNCHROSCOPE INDICATOR, ENG/PROP is designed as a form-fit-function replacement. Verify the part number against your aircraft's Illustrated Parts Catalog (IPC) and instrument panel layout to confirm compatibility before ordering.

Do you offer instrument exchange programs for the 50-389091?

Yes, we offer core exchange programs on select instruments. Send your unserviceable unit and receive a discount on the replacement. Call (904) 998-9101 or submit an RFQ to check exchange availability for the 50-389091.