Honda Aircraft Company
HA-420
SYSTEMS
POM
DESCRIPTION
HJ1-29000-005-001
October 30, 2016
1-150
BLEED AIR LEAK DETECTION
A Bleed Air Leak Detection (BALD) system runs the length of the bleed
air system. The BALD system runs through the hot side inlet of the
Temperature Modulating Valve, including the heat exchanger inlets and
the wing anti-ice system.
Each BALD sensor is comprised of a conductive tube filled with an
extruded eutectic salt around a core. As the temperature surrounding a
sensing element reaches its alarm point, the BALD Controller activates a
discrete alarm output.
The following areas are monitored:
1.
Left Bleed Air Duct between the horizontal firewall and the Left
FCSOV
2.
Right Bleed Air Duct between the horizontal firewall and the
Right FCSOV
3.
Left FCSOV to the Left Temperature Modulating Valve / Heat
Exchanger in the tailcone
4.
Right FCSOV to the Right Temperature Modulating Valve /
Heat Exchanger in the tailcone
5.
Wing Anti-ice System
FOR TRAINING PURPOSES ONLY
