• Installed behind red or green lens assemblies on wingtips to indicate the aircraft’s left or right side during flight and on the ground.
  
  

• Used behind a clear or white lens at the tail to provide the rear navigation light, ensuring visibility to other aircraft approaching from behind.
  
  

• Carried as a spare on board or in maintenance toolkits, enabling quick replacement during routine checks or defect rectification to minimize aircraft downtime.
  
  

• Used temporarily during ground runs to verify operation of navigation light circuits, harnesses, and lens assemblies, ensuring proper electrical continuity and brightness.

• Which lamp sockets are A7512-24 compatible with?

It fits sockets designed for BAY15s single-contact bayonet lamps rated 28 V. Always check the maintenance manual or lamp assembly documentation to confirm socket type and electrical rating before installation.

• How do I install or replace this lamp?

Turn off power to the lighting circuit, allow the existing bulb to cool, then push the lamp into the socket and twist until it locks in the bayonet slots. Avoid touching the glass envelope with bare fingers; use gloves or a clean cloth to prevent oils that could weaken the bulb under heat.

• What is the expected service life and replacement interval?

The filament life is approximately 300 hours under normal operating conditions.