BOMBARDIER BD-100-1A10, Operating Manual

Page: 86 / 544

AIR CONDITIONING/PRESSURIZATION
Volume 2 Flight Crew Operating Manual Sep 13/2004
02-02-06
CSP 100-6
REV 1
BLEED AIR LEAK DETECTION SYSTEM
DESCRIPTION
The bleed leak detection system monitors the bleed air and anti-ice ducts for leakage. The bleed leak detection system is
controlled by the integrated air system controllers (IASC) and is fully automatic.
The bleed air leak detection system is divided into eight zones for EICAS presentation:
- Left bleed duct
- Right bleed duct
- Left wing anti-ice duct
- Right wing anti-ice duct
- Right pylon duct
- Left pylon duct
- Pack ducts
- Trim air ducts
COMPONENTS AND OPERATION
SINGLE LOOPS
Single loops are used for left and right bleed ducts and trim air ducts.
DUAL-SENSING LOOPS
Dual-sensing loops are used to monitor the following:
- Bleed air ducts in the engine pylons
- Bleed air ducts in the aft equipment bay
- Anti-ice ducts in the aft equipment bay
- Anti-ice ducts in the wing leading edges.
The dual-loop system minimizes false leak indications, and allows the aircraft to be dispatched under certain conditions
with one loop inoperative. A loop FAIL indicates both loops inoperative. A loop FAULT indicates one loop inoperative.
BLEED AIR AND ANTI-ICE DUCTS
The bleed air ducts are constructed of stainless steel, titanium or aluminum and wrapped with insulation. A series of vent
holes in the duct covers direct escaping bleed air to the sensing loops in the event of a bleed air leak.