T B M
PILOT’S OPERATING HANDBOOK
850
SECTION 7
DESCRIPTION
Page 7.9.2
Edition 1 -- June 22, 2007
Rev. 14
The system normaly operates on the P2.5 port as long as the pressure or
temperature demands are met by this port.
If one of these conditions is not met, the system automatically switches to the
P3 port.
When the pressure or temperature demand can be met by the P2.5 port, the
system automatically returns to using the P2.5 port.
The Inlet Pressure Port Sensor (IPPS) measures the pressure at the P2.5
port and sends the value to the GASC which manages the ports switching on
condition with the Shut Off Valve (SOV).
A Non Return Valve (NRV) prevents P3 air from entering the P2.5 port when
the P3 port is opened.
To ensure a controlled airflow in the cabin
The bleed air flow is controlled by the Flow Control and Shut Off Valve
(FCSOV) driven by the GASC.
To adjust the temperature of the bleed air
The bleed air outlet temperature control is ensured by the By--Pass Valve
(BPV) in association with the Main Heat Exchanger (MHX).
Based on pilot’s or passengers’ CABIN TEMP/
°
C selector position, the
GASC computes the appropriate cabin air inlet temperature target and
compares it to the actual measured inlet temperature in order to set the BPV
position. The BPV derives a part of the bleed air through the MHX to cool it
and mixes it to the remaining cabin air.
System operation
See Figure 7.9.3.
The BLEED switch allows selection of the engine bleed air system provided
that the engine is running.
The Ground Fan (GF) operates until takeoff, when BLEED switch is set to
AUTO, and ”MAIN GEN” amber CAS message is OFF.
The BLEED switch is fitted with a blocking device between AUTO and
OFF/RST positions. This prevents the operator from inadvertently setting the
BLEED switch to OFF/RST position.
To reset the system, set BLEED switch to OFF/RST, then back to AUTO.
PIM - DO NOT USE FOR FLIGHT OPERATIONS
Summary of Contents for TBM 850
Page 1: ...PILOT S INFORMATION MANUAL TBM 850 Edition 1 PIM DO NOT USE FOR FLIGHT OPERATIONS ...
Page 142: ...3 1 PIM DO NOT USE FOR FLIGHT OPERATIONS ...
Page 146: ...3 2 PIM DO NOT USE FOR FLIGHT OPERATIONS ...
Page 150: ...3 3 PIM DO NOT USE FOR FLIGHT OPERATIONS ...
Page 164: ...3 4 PIM DO NOT USE FOR FLIGHT OPERATIONS ...
Page 170: ...3 5 PIM DO NOT USE FOR FLIGHT OPERATIONS ...
Page 178: ...3 6 PIM DO NOT USE FOR FLIGHT OPERATIONS ...
Page 184: ...3 7 PIM DO NOT USE FOR FLIGHT OPERATIONS ...
Page 196: ...3 8 PIM DO NOT USE FOR FLIGHT OPERATIONS ...
Page 202: ...3 9 PIM DO NOT USE FOR FLIGHT OPERATIONS ...
Page 216: ...3 10 PIM DO NOT USE FOR FLIGHT OPERATIONS ...
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