H.S.I. IND (P/N 138740-23) - As Removed

The 138740-23 is a horizontal situation indicator (HSI) combining heading display with VOR/ILS course guidance in a single panel-mounted instrument. This Astronautics HSI integrates magnetic heading information from a remote compass or flux valve with navigation receiver input to present both heading and course deviation simultaneously. Mounted in standard aircraft instrument panels, it serves as the primary navigation reference for conventional avionics systems.

Installation connects to compass systems and NAV receivers per aircraft maintenance manual specifications.

What is the H.S.I. IND (P/N 138740-23)?

The 138740-23 is a horizontal situation indicator (HSI) combining heading display with VOR/ILS course guidance in a single panel-mounted instrument. This Astronautics HSI integrates magnetic heading information from a remote compass or flux valve with navigation receiver input to present both heading and course deviation simultaneously.

Is the 138740-23 calibrated and ready to install?

Calibration status depends on the condition. Overhauled instruments come fully calibrated with an 8130-3 tag. The H.S.I. IND is available in: As Removed. Contact us to confirm calibration status for your selected condition.

Can the 138740-23 be used as a direct replacement in my aircraft?

The H.S.I. IND 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 138740-23?

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 138740-23.