The 646400-1 Tube Assembly is an OEM Continental air reference tube used in aircraft piston engine systems, specifically in configurations involving the air reference/magneto system (“Air Ref. Mag.”). It is a pre-formed precision tube that routes air reference pressure between engine components, helping support correct pressure sensing and system operation within the fuel/ignition reference architecture.

This type of tube is manufactured to exact bends and dimensions, meaning it must not be reshaped during installation, as deformation can cause cracking or failure under vibration and engine heat cycling.

Key features include:

Genuine Continental OEM tube assembly
Pre-formed rigid tubing for air reference routing
Used in air reference/magneto-related engine systems
Precision-bent to maintain exact factory geometry
Designed for vibration-heavy aviation engine environments
Maintains correct pressure reference signal integrity
Resistant to fatigue when installed without deformation
Compatible with specific Continental piston engine configurations (application-dependent IPC)
FAA-approved aircraft engine system component
Used in certified engine maintenance and overhaul procedures