The AST422F Lamp Bulb is an aircraft lighting replacement component designed as an alternative to Part Number 4X443. It provides dependable illumination for compatible aircraft lighting applications, supporting safe operation and clear visibility in environments where reliable lighting performance is essential.

Manufactured for aviation use, the bulb is intended to deliver consistent light output and dependable operation under the vibration and environmental conditions encountered during aircraft service. It is suitable for replacement during scheduled maintenance or when an existing lamp has reached the end of its service life.

Proper installation of a serviceable lamp helps maintain the performance of the aircraft lighting system and contributes to continued operational reliability. Compatibility should always be verified against the applicable aircraft or equipment maintenance documentation before installation.

Key Features

- Part Number: AST422F
- Manufacturer: Not Specified
- Component: Aircraft Lamp Bulb
- Alternative replacement for Part Number 4X443
- Provides reliable illumination for compatible aircraft lighting systems
- Designed to withstand typical aviation vibration and operating conditions
- Suitable for maintenance and replacement of approved lighting assemblies