ATR72-600 SYSTEMS EXAM 2025
QUESTIONS AND ANSWERS
The main applications hosted by the Core Avionic Cabinets (CAC) -
....ANSWER ...-- Flight Warning (FWA)
- Auto-Flight (AFCA)
- Centralized Maintenance (CMA) (only on CAC 1)
- Data Concentration (DCA)
Three types of visual devices used: - ....ANSWER ...-- MASTER
WARNING and MASTER CAUTION lights
- FWS alert and procedure windows
- LOCAL ALERT lights
Pneumatic system supplies what aircraft systems? -
....ANSWER ...-- Air conditioning
- Ventilation
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 1
,- Pressurization
- De-icing
ENG BLEED functions (3) - ....ANSWER ...-- Controls both
bleed and HP valves
- Spring loaded closed
- Must have air and electricity to open
ENG BLEED Auto closure reasons (7) - ....ANSWER ...--
OVHT
- LEAK
- overpressure
- fire handle pulled
- UPTRIM triggered
- prop brake on (left one only)
- Inhibited during eng start
AIR BLEED GRD X FEED (3) - ....ANSWER ...-- Spring loaded
closed
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 2
,- Inhibited in flight
- Auto opens on ground when only one bleed valve is opened
PACK VALVE (3) - ....ANSWER ...-- Spring loaded closed
- Must have air and electricity to open
- 6'' delay on RH valve for pax comfort
BLEED OVHT - ....ANSWER ...-- either duct temp switch above
274°C
**FWS.
***Auto closure bleed valves (LP and HP)
May be reset after cooling
PACK VALVE FAULT reasons (3) - ....ANSWER ...-- pack valve
disagreement with pb / or OVHT downstream
- pack comp. (>204°C).
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 3
, - Ground cooling turbo fan failure
**FWS.
***Valve auto closed
ENG BLEED FAULT - ....ANSWER ...-- Bleed valve
disagreement with
selected position (or in case
of OVHT or LEAK)
**FWS
***Associated valves auto closed
BLEED LEAK - ....ANSWER ...-- Temp detected by bleed loop
exceeds 153 ±8°C
**EWD
***Auto closure after 1'' of following valves:
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 4
QUESTIONS AND ANSWERS
The main applications hosted by the Core Avionic Cabinets (CAC) -
....ANSWER ...-- Flight Warning (FWA)
- Auto-Flight (AFCA)
- Centralized Maintenance (CMA) (only on CAC 1)
- Data Concentration (DCA)
Three types of visual devices used: - ....ANSWER ...-- MASTER
WARNING and MASTER CAUTION lights
- FWS alert and procedure windows
- LOCAL ALERT lights
Pneumatic system supplies what aircraft systems? -
....ANSWER ...-- Air conditioning
- Ventilation
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 1
,- Pressurization
- De-icing
ENG BLEED functions (3) - ....ANSWER ...-- Controls both
bleed and HP valves
- Spring loaded closed
- Must have air and electricity to open
ENG BLEED Auto closure reasons (7) - ....ANSWER ...--
OVHT
- LEAK
- overpressure
- fire handle pulled
- UPTRIM triggered
- prop brake on (left one only)
- Inhibited during eng start
AIR BLEED GRD X FEED (3) - ....ANSWER ...-- Spring loaded
closed
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 2
,- Inhibited in flight
- Auto opens on ground when only one bleed valve is opened
PACK VALVE (3) - ....ANSWER ...-- Spring loaded closed
- Must have air and electricity to open
- 6'' delay on RH valve for pax comfort
BLEED OVHT - ....ANSWER ...-- either duct temp switch above
274°C
**FWS.
***Auto closure bleed valves (LP and HP)
May be reset after cooling
PACK VALVE FAULT reasons (3) - ....ANSWER ...-- pack valve
disagreement with pb / or OVHT downstream
- pack comp. (>204°C).
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 3
, - Ground cooling turbo fan failure
**FWS.
***Valve auto closed
ENG BLEED FAULT - ....ANSWER ...-- Bleed valve
disagreement with
selected position (or in case
of OVHT or LEAK)
**FWS
***Associated valves auto closed
BLEED LEAK - ....ANSWER ...-- Temp detected by bleed loop
exceeds 153 ±8°C
**EWD
***Auto closure after 1'' of following valves:
....COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 4
