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Leading Particulars WARNINGS/CAUTIONS OTHER NORMAL OPERATING PROCEDURES ATM OPERATION
100
What is 120 seconds
FADEC monitors the APU cool down timer which is set to this amount of time once bleed load was last removed
100
What is two approved fire extinguishers and a CFR vehicle on standby outside the hanger
When operating APU/ATMs in a hangar not equipped with FSS you are requires to have these two things
100
What is 4,500lbs
You must have at least this amount of fuel in the No. 2 and No. 3 main tanks for APU/ATM operation
100
What is > 899 degrees Celsius
If the EGT starting limit exceeds this FADEC will signal the APU to shutdown
100
What is 15 seconds
During ATM operation if normal hydraulics isn't observed within this amount of time you are required to shut down the ATM
200
What is 15 degrees
When the APU door reaches this degree, the FADEC transitions to its start state
200
What is 50 FT
When operating APU/ATMs in a hangar the hangar doors must be open at least this amount to allow for ventilation and CFR vehicle access
200
What is the OFF position
With external power connected and only one serviceable RTRU available the APU BATT switch will be positioned in this position to allow for the APU to start directly from the APU BATT
200
What is 692 degrees Celsius
The maximum continuous EGT running limit is this
200
What is 3,000 +- 150PSI
This pressure is displayed on the #1 or #4 hydraulic pressure gauges when sys #1 or sys #4 on ATM pump press panel is switched to start
300
What is <7% RPM
The inlet door is commanded to close when engine speed drops to this RPM
300
What is a fire guard with an adequate fire extinguishers positioned at compartment
When operating an APU with the APU compartment door open you must first ensure you have this
300
What is the BYPASS position
With external power connected, a serviceable A/C BATT installed, the APU may be started without an APU BATT installed as long as the APU BATT switch is placed in this position
300
What is 55%
The starter light goes off at this amount RPM
300
What is 2,400 PSI min
This pressure is read on No.2 and No.3 hydraulic pressure gauges when you pressurize hydraulic systems 2 and 3 via PTUs
400
What is SBIT
FADEC performs this form of BIT once power is applied and is completed in less than 5 seconds
400
What is the ACFT BATT
You will lose the function of APU FIRE PULL handle shutdown, fire detection, fire extinguisher discharge and APU control if this switch is in the OFF position
400
What is 3
A maximum of how many start attempts can take place in a 1 hour span
400
What is 95% plus 2 seconds
The white box goes off and the ON SPEED light comes on at this amount RPM
400
What is the OFF position
The KNEEL COMMAND switch is set to this position during ATM operation
500
What is an inadvertent shutdown
A red box around the APU indications on the MFDU indicates this
500
What is APU fire warning horn and essential auto shutdown features
If the A/C is on jacks, landing gear is cross kneeled, or No. 1 touchdown relay circuit breaker is pulled before or during APU operation these features will be inoperative
500
What is 2 minutes
You are required to allow the APU to warm up for this amount of time BEFORE applying an air load
500
What is No. 1 and No. 2
With APU power and external power connected the APU is powering these buses
500
What is the UPPER and LOWER RUDDER switches on the flight control overhead panel
If pressure gauges are not steady take these switches to OFF, observe gauges and then take back to NORM




APU JEOPARDY

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