ATA 21 (B777 AMM Part 1) Flashcards
In the Air Conditioning System the primary controller for the recirculation fans is: (B2)
a. the right Cabin Temperature Controller (CTC)
b. the left CTC
c. dependant on the power up sequence.
A
Two lavatory/galley ventilation fans operate: (B2)
a. at the same time
b. at airplane power up.
c. in sequence with the right fan as primary and the left fan as backup
C
Automatic Operation mode is selected when the switch shows: (B2)
a. ON
b. AUTO
c. CLOSED
B
The override mode of the equipment cooling system gives cooling above a sufficient cabin differential pressure when the airplane is above: (B2)
a. 25,000 feet (7625 meters).
b. 13,000 feet (4251 meters)
c. 10,000 feet (3270 meters)
A
You can operate the equipment cooling system on the ground with a malfunction of the vent fan as long as ambient temperature is: ( B2)
a. not equal to or greater than 110 oF (43 oC)
b. not equal to or greater than 86 oF (30 oC)
c. equal to or greater than 110 oF (43 oC)
B*
When the IFE cooling system is off, ELMS automatically: (B2)
a. does not remove power from the in-flight entertainment equipment
b. removes power from the in-flight entertainment equipment
c. switches on the aural alarm in the cockpit.
A
This pressurization information shows in the ECS (environmental control system) data block on the EICAS display duct pressure: (B1, B2)
a. Amber if duct pressure is less than 11 psi
b. Amber if duct pressure is less than 9.42 psi.
c. Amber if duct pressure is less than 8.95 psi.
A
Cabin Altitude Warning Message shows if cabin altitude is higher than a safe limit. The cabin altitude at which the warning message shows is: (B1, B2)
a. 10,000 feet
b. 14,200 feet
c. related to the selected landing altitude
(C)
In the automatic mode of Cabin Pressure Control System, the Air Supply Cabin Pressure Controller (ASCPC) in control of the position of the outflow valve is: (B1, B2)
a. The left ASCPC
b. The right ASCPC.
c. dependant on the power up sequence.
(B)
In the Cabin Pressure Control System: (B1, B2)
a. One outflow valve can operate in automatic mode and the other can operate in manual mode atthe same time.
b. Both outflow valves shall work in automatic mode at the same time
c. Both outflow valves shall work in manual mode at the same time
(A)
When can you use the Outflow Valve Manual Switch to move the outflow valves? (B1,
B2)
a. when you manually set the landing altitude
b. when the cabin pressure is more than 8.6 psi above ambient
c. when the Outflow Valve Switches are in the MAN position.
(C)
The positive pressure relief valve opens when cabin air pressure: (A1, B1)
a. is higher than ambient pressure by a set value
b. is lower than ambient pressure by a set value
c. is differential to the remote ambient pressure sense port by 8.95 psi
(A)
How many Pack Flow Schedules (limits) can be set by the Air Supply Cabin Pressure Controller (ASCPC) for the Cabin Temperature Controllers (CTC) to use to control air flow into the airplane, (packs and trim air)? (B1, B2)
a. 2
b. 3
c. 4
(C)
In the air conditioning - pack flow control system, at start up (when you put the pack switch to AUTO), the flow control and shutoff valve opens. (B1, B2)
a. fully to increase air flow to the schedule rate
b. at a rate that gives efficient air cycle machine acceleration.
c. slowly to permit condensed water to evaporate from the pack
(B)
Adjustment of the target temperature for the cabin by area (zone) can be done: (B2)
a. from the Air Conditioning/CABIN TEMP control on the P5 overhead panel in the flight deck
b. from the Cabin System Control Panel (CSCP) and Cabin Area Control Panels (CACP) in thepassenger cabin
c. from both the flight deck and the passenger cabin.
(B)
In normal condition, which component controls Flow Control and Shut Off Valve
(FCSOV)? (B1)
a. Cabin Temperature Controller (CTC)
b. Air Supply and Cabin Pressure Controller (ASCPC)
c. Airplane Information Management System (AIMS)
A, B*
Why are there 2 FCSOVs for each airconditioning pack? (B1)
a. The upper FCSOV is the main source for pack flow, the lower valve is the standby source
b. One FCSOV is controlled by ASCPC while the other is controlled by CTC
c. The upper valve controls air flow to airconditioning pack at low altitude, the lower valve let air go thru Ozone Converter before entering airconditioning pack at higher altitudes
C
How long after selecting pack control switch to OFF will the OFF light (on the pack control switch) illuminate? (B1)
a. 20 seconds
b. 35 seconds
c. 2 minutes
B
Which statement best describes the purpose of Economy Cooling Valve (ECV)? (B1)
a. ECV meters the air flow thru airconditioning pack when FCSOV fully open
b. ECV opens to prevent ACM stall at altitudes higher than 26000ft
c. ECV opens to let air go around the ACM turbine 1 and the water separation parts of the pack
C*
Purpose of the upper recirculation fans is to: (B1)
a. Put cabin air to mixmanifold
b. Put cabin air back in the overhead conditioned air distribution ducts
c. Move cabin air overboard
B
In normal condition, which component control the operation of recirculation fans?
(B1)
a. Right CTC
b. Left CTC
c. Environmental Control System Miscellaneous Card (ECSMC)
A
The purpose of Equipment Cooling Controllers (ECCs) is to: (B1)
a. Take control of equipment cooling supply fans and override valves in the air when there is low flow condition
b. Control equipment cooling supply fans and vent valves
c. Take control of equipment cooling fans and valves when ECSMC fails
SATCOM backup fan is used to pull the air thru electronic components in E11. This fan is on when: (B1)
a. Airplane is in the air
b. Airplane is on the ground
c. Both lavatory/galley ventilation fans do not work
C*
Advisory message EQUIP COOLING appears when (B1)
a. There is low flow in the equipment cooling system in the air for 5 minutes
b. Smoke is detected in the equipment cooling system on the ground
c. There is low flow in the equipment cooling system on the ground for 5 minutes
