B757 767 Airconditioning

Front 1

1. What does a PACK OFF light and associated EICAS message indicate?
A. Pack operating normally
B. Respective pack valve closed
C. Pack operating in high flow

Back 1

B. Respective pack valve closed

Front 2

2. During automatic temperature control, which temperature zone controls the output of the air
conditioning packs?
A. The zone requiring the coolest air
B. The zone requiring the warmest air
C. The zone with the warmest selection

Back 2

A. The zone requiring the coolest air

Front 3

3. What altitude setting is selected on the Landing Altitude Indicator during cockpit preparation?
A. 200 feet below takeoff airport elevation
B. Landing altitude in feet
C. Cabin altitude as determined from placard

Back 3

B. Landing altitude in feet

Front 4

4. What occurs if the Cabin Altitude Mode selector is set to AUTO 1 and it fails?
A. Nothing
B. Control is automatically switched to auto controller 2
C. Control must be manually switched to auto controller 2

Back 4

B. Control is automatically switched to auto controller 2

Front 5

5. What could cause all three of the Compartment Temperature INOP lights to illuminate?
A. One pack off
B. Trim Air switch OFF
C. Left pack in high flow

Back 5

B. Trim Air switch OFF

Front 6

6. The Left Pack INOP light annunciates because the pack outlet temperature is too high. What
occurs automatically?
A. The left pack is shut down
B. The left pack temperature control valve is driven closed
C. Right pack produces high flow

Back 6

B. The left pack temperature control valve is driven closed

Front 7

7. What does the Pack Reset switch do when pushed?
A. Resets temperature to 75°F
B. Resets flight deck equipment smoke detection
C. Resets pack overheat detection system

Back 7

C. Resets pack overheat detection system

Front 8

8. When a Pack Control selector is positioned to STBY N, what is the outlet temperature of
the pack in flight ?
A. A constant, moderate temperature (40°F inflight)
B. Variable, dependent upon zone requirements
C. Full warm setting

Back 8

A. A constant, moderate temperature (40°F inflight)

Front 9

9. What can cause a PACK OFF light to illuminate when the Pack Control selector is in AUTO?
A. Pack valve is closed
B. Excessive airflow
C. Trim Air switch OFF

Back 9

A. Pack valve is closed

Front 10

10. What cabin temperature do the packs attempt to maintain if the Trim Air switch is selected
OFF?
A. 50°F (10°C)
B. Maintain all compartments at an average temperature of 75°F (24°C)
C. Variable, depending upon zone requirement

Back 10

B. Maintain all compartments at an average temperature of 75°F (24°C)

Front 11

11. What is the purpose of Trim Air?
A. Controls pack temperature
B. Hot trim air from the bleed air system is added to meet the zone temperature requirements
C. Cools conditioned air to meet the zone temperature requirements

Back 11

B. Hot trim air from the bleed air system is added to meet the zone temperature requirements

Front 12

12. What does the Trim Air OFF light indicate?
A. A pack has failed
B. An overheat of the pack
C. The trim air valve is commanded close

Back 12

C. The trim air valve is commanded close

Front 13

13. What can cause a Compartment Temperature INOP light to annunciate?
A. Excessive pack outlet temperature
B. Excessive internal pack temperature or loss of air pressure
C. Zone air overheat or fault in zone temperature controller

Back 13

C. Zone air overheat or fault in zone temperature controller

Front 14

14. What is the position of the outflow valve after failure of both pressurization auto controllers?
A. It drives full open
B. It remains in last controlled position
C. It drives full closed

Back 14

B. It remains in last controlled position

Front 15

15. What crew action illuminates the AUTO INOP light on the Cabin Altitude Control Panel?
A. Selecting MAN position on the Cabin Altitude Control Panel
B. Selecting AUTO
C. Selecting AUTO 1

Back 15

A. Selecting MAN position on the Cabin Altitude Control Panel

Front 16

16. What cabin altitude extinguishes the CABIN ALTITUDE light and EICAS message?
A. Cabin altitude below 8500 ft
B. Cabin altitude above 10,000 ft
C. Cabin altitude at 11,000 ft

Back 16

A. Cabin altitude below 8500 ft

Front 17

17. What could cause the outflow valve to close automatically while AUTO 1 or 2 is selected?
A. If cabin altitude exceeds 10,000 ft but less than 11,000 ft
B. If cabin altitude exceeds 11,000 ft
C. If cabin altitude exceeds 8500 ft

Back 17

B. If cabin altitude exceeds 11,000 ft

Front 18

18. What is the expected pressurization limits for climbs and descents with Auto Rate knob set
at the index mark?
A. Climb - 500 fpm; descent - 300 fpm
B. Climb - 50 fpm; descent - 30 fpm
C. Climb - 1200 fpm; descent - 1200 fpm

Back 18

A. Climb - 500 fpm; descent - 300 fpm

Front 19

19. What does the Cabin Altitude AUTO INOP light indicate?
A. Auto 1 inoperative
B. Auto 2 inoperative
C. Both Auto 1 and 2 are inoperative or manual mode selected

Back 19

C. Both Auto 1 and 2 are inoperative or manual mode selected

Front 20

20. What condition(s) activate the ground call horn?
A. Outflow valve is open
B. Insufficient equipment cooling airflow detected on the ground
C. Pushing the Pack Reset switch for 10 seconds

Back 20

B. Insufficient equipment cooling airflow detected on the ground

Front 21

21. What is indicated by the Cabin Altitude AUTO INOP light and associated EICAS message?
A. APU operating above 17,000 ft
B. Both Auto 1 and Auto 2 pressurization controllers failed or manual has been selected
C. Autothrottles have disconnected

Back 21

B. Both Auto 1 and Auto 2 pressurization controllers failed or manual has been selected

Front 22

757 22. Smoke has been detected in the forward equipment cooling system. How is the smoke
removed?
A. Through the outflow valve only
B. Through a pneumatic recirculation air filter
C. Through the overboard exhaust valve

Back 22

C. Through the overboard exhaust valve

Front 23

757 23. One forward equipment cooling system supply fan operates at a time. What starts the
alternate fan?
A. High temperature in the forward E/E compartment
B. Selecting the Alternate Equipment Cooling switch to ALTN
C. Low cooling air pressure

Back 23

B. Selecting the Alternate Equipment Cooling switch to ALTN

Front 24

757 24. Which condition automatically opens the overboard exhaust valve?
A. One supply fan fails
B. The recirculation fan fails
C. A pressure differential greater than 3.25 psi

Back 24

B. The recirculation fan fails

Front 25

757 25. What occurs if ALTN is selected on the Alternate Equipment Cooling switch?
A. Starts the alternate supply fan and sends a signal to open the overboard exhaust valve
when the recirculation fan is not operating and the valve does not automatically open
B. Shuts down aft E/E fans
C. Inhibits FUEL CONFIG light for one minute

Back 25

A. Starts the alternate supply fan and sends a signal to open the overboard exhaust valve when the recirculation fan is not operating and the valve does not automatically open

Front 26

RR 26. With the High Altitude Landing switch OFF, what cabin altitude annunciates the CABIN
ALTITUDE light and EICAS message?
A. 8500 ft
B. 10,000 ft
C. 14,650 ft

Back 26

B. 10,000 ft

Front 27

RR 27. With the High Altitude Landing switch ON, what cabin altitude annunciates the CABIN
ALTITUDE light and EICAS message?
A. Below 8500 ft
B. 10,000 ft
C. 14,650 ft

Back 27

C. 14,650 ft

Front 28

767 28. What condition annunciates the Equipment Cooling VALVE light?
A. No airflow in the E/E racks
B. Equipment cooling valve(s) are not in the commanded position(s)
C. An equipment cooling system test passed

Back 28

B. Equipment cooling valve(s) are not in the commanded position(s)

Front 29

767 29. What does the NO COOLING light indicate with OVRD selected on the Equipment Cooling
Panel?
A. No reverse airflow through the E/E compartment
B. A supply fan is inoperative
C. The exhaust fan is inoperative

Back 29

A. No reverse airflow through the E/E compartment

Front 30

767 30. What does the Equipment Cooling OVHT light indicate?
A. Main Cargo Alert switch selected
B. Smoke detected in the lavatory
C. High temperature or low airflow in the equipment cooling system

Back 30

C. High temperature or low airflow in the equipment cooling system

Front 31

767 31. What does the Equipment Cooling SMOKE light indicate?
A. Smoke in the equipment cooling system
B. Smoke in the bulk cargo area
C. Smoke in the main cargo area

Back 31

A. Smoke in the equipment cooling system

Front 32

767 32. Selecting the Equipment Cooling selector to OVRD results in what equipment cooling actions?
A. Positions equipment cooling system for reverse airflow and opens the smoke/override
valve
B. The supply fan is signaled to operate and the manifold interconnect valve switches to
recirculated fan air
C. The overboard exhaust valve opens and the recirculation fan shuts down

Back 32

A. Positions equipment cooling system for reverse airflow and opens the smoke/override

Front 33

33. What systems rely on pneumatics?
A. Air conditioning/pressurization and B757 thrust reversers
B. Air conditioning/pressurization and B767 thrust reversers
C. Tailskid, inboard ailerons and L3 window heat

Back 33

B. Air conditioning/pressurization and B767 thrust reversers

Front 34

34. What pneumatic sources are available on the ground?
A. Ground air source only
B. APU, ground air source, or engines
C. APU only

Back 34

B. APU, ground air source, or engines

Front 35

35. What pneumatic sources are available in flight?
A. Either operating engine and/or APU
B. Left operating engine only
C. Either operating engine

Back 35

A. Either operating engine and/or APU

Front 36

36. What does the Engine Bleed Air OFF light indicate?
A. Engine bleed air valve open
B. Engine bleed air valve closed
C. High stage valve open

Back 36

B. Engine bleed air valve closed

Front 37

37. What could cause the Engine Bleed Air OFF light to illuminate?
A. Bleed air overheat, engine shut down, respective Engine Fire switch PULLED OUT or
Engine Bleed Air switch selected OFF
B. Bleed air normal, engine running, respective Engine Fire switch IN or Engine Bleed Air
switch selected ON
C. Both air conditioning packs selected OFF

Back 37

A. Bleed air overheat, engine shut down, respective Engine Fire switch PULLED OUT or
Engine Bleed Air switch selected OFF

Front 38

38. How is the APU protected from reverse air flow?
A. System logic and a check valve
B. Shuts down automatically
C. Closes engine bleed valves

Back 38

A. System logic and a check valve

Front 39

39. What does the APU Bleed Air VALVE light indicate?
A. (757) Right Engine Fire switch is PULLED OUT
B. Cabin altitude above 10,000 ft
C. APU bleed air valve position disagrees with signaled position or valve in transit

Back 39

C. APU bleed air valve position disagrees with signaled position or valve in transit

Front 40

40. What does the Isolation VALVE light indicate?
A. Isolation valve position disagrees with commanded position
B. Isolation valve position agrees with commanded position
C. (757) Left Engine Fire switch is PULLED OUT

Back 40

A. Isolation valve position disagrees with commanded position

Front 41

757 41. What does the HI STAGE light indicate?
A. Engine bleed system pressure is excessive
B. Engine bleed air temperature is excessive
C. Duct leak in the pneumatic system

Back 41

A. Engine bleed system pressure is excessive

Front 42

757 42. What does the BLEED light indicate?
A. Overpressure indication
B. Indicates bleed air temperature is excessive
C. Duct leak in the pneumatic manifold

Back 42

B. Indicates bleed air temperature is excessive

Front 43

757 43. What does a DUCT LEAK light indicate?
A. High temperature bleed air leak is detected
B. Overpressure
C. Engine bleed air temperature is excessive

Back 43

A. High temperature bleed air leak is detected

Front 44

757 44. What is indicated with an Engine Bleed Air OFF light and L or R ENG BLEED OFF EICAS
message illuminated?
A. Engine bleed air valve is open
B. Engine bleed air valve is closed for a system fault
C. A left or right duck leak has been detected

Back 44

B. Engine bleed air valve is closed for a system fault

Front 45

757 45. What does the OVHT light indicate?
A. Pneumatic leak in the crossover manifold
B. Overpressure condition
C. Engine bleed air temperature is excessive

Back 45

C. Engine bleed air temperature is excessive

Front 46

757 46. What does the BLEED light indicate?
A. Over-temperature condition
B. Engine HPSOV and/or PRV valves are open when they should be closed
C. Duct leak in right manifold

Back 46

B. Engine HPSOV and/or PRV valves are open when they should be closed

Front 47

757 47. What does a DUCT LEAK light and EICAS message indicate?
A. High temperature bleed air leak is detected
B. Overpressure condition
C. Hydraulic fluid leak

Back 47

A. High temperature bleed air leak is detected

Front 48

757 48. What occurs automatically following a strut duct leak?
A. The respective engine bleed valves are closed automatically
B. The respective engine bleed valves are opened automatically
C. APU senses a fault and shuts down automatically

Back 48

A. The respective engine bleed valves are closed automatically