BULB-RED (P/N 313r) - New Surplus

The 313r is a 28-volt miniature incandescent bulb with a BA9s bayonet base producing red light for aircraft instrument panels and annunciators. This lamp illuminates cockpit indicators, warning lights, and panel backlighting on general aviation and corporate aircraft electrical systems. The miniature incandescent design provides reliable red illumination in low-power 28V DC applications.

Cross-referenced to MS25231-313 military specification, the 313r installs directly into compatible lamp sockets. Verify part number against the aircraft's Illustrated Parts Catalog before replacement and test operation per maintenance manual procedures.

What is the BULB-RED (P/N 313r)?

The 313r is a 28-volt miniature incandescent bulb with a BA9s bayonet base producing red light for aircraft instrument panels and annunciators. This lamp illuminates cockpit indicators, warning lights, and panel backlighting on general aviation and corporate aircraft electrical systems.

Is the 313r a PMA or OEM part?

The BULB-RED may be available as an OEM (Original Equipment Manufacturer) or PMA (Parts Manufacturer Approval) part depending on condition and source. Both carry FAA certification for airworthiness. Currently available in: New Surplus. Contact us for sourcing details.

Does the 313r include installation hardware?

Installation hardware requirements vary by application. Check your aircraft's Structural Repair Manual (SRM) or Illustrated Parts Catalog (IPC) for the complete installation kit requirements for the BULB-RED. We stock related hardware and can help identify companion parts.

Can the 313r be shipped internationally?

Yes, we ship airframe components worldwide. International orders typically arrive within 3-14 business days depending on destination. Export documentation and customs forms are included. Contact us for international shipping quotes on the 313r.