INDICATOR BULB (P/N 344) - New Surplus

Part 344 is a 28-VDC miniature incandescent indicator bulb for aircraft cockpit annunciators and instrument panel status lights. This lamp provides visual indication of system status, alerts, and operational conditions on avionics panels. The bulb installs directly into indicator lamp holders using a standard aviation base design conforming to MS25237 specifications.

Replacement occurs during routine maintenance when the filament fails or brightness diminishes. Verify base type and voltage rating in your aircraft's Illustrated Parts Catalog before installation to ensure compatibility with existing lamp holders.

What is the INDICATOR BULB (P/N 344)?

Part 344 is a 28-VDC miniature incandescent indicator bulb for aircraft cockpit annunciators and instrument panel status lights. This lamp provides visual indication of system status, alerts, and operational conditions on avionics panels.

Is the 344 calibrated and ready to install?

Calibration status depends on the condition. Overhauled instruments come fully calibrated with an 8130-3 tag. The INDICATOR BULB is available in: New Surplus. Contact us to confirm calibration status for your selected condition.

Can the 344 be used as a direct replacement in my aircraft?

The INDICATOR BULB 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 344?

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 344.