Electrics
Descent & Landing
Take-off
Starting Engines
Ops Limits
100

What are the ways to get electrical power on the ground? 

onboard APU 

external power cart 

one of the three engine-driven generators 

100

What are the holding speeds for the KC-135

all gross weights above 170,000lbs : best endurance +10

all gross weights up to 170,000lbs : 200 KIAS

100

Where does take-off flare begin and end?

begins at unstick and ends when reaching climb-out speed at approximately 35 feet. 

100

What is max motoring speed for N2?

less than 1% increase in N2 in 5 seconds


100

AC amps Max

116 volts

200

What does the DC loadmeter display? 

Fraction of the load carried by source selected in units of tenths of full load capacity 

200

In conditions worse than light icing, what minimum N1 setting is recommended? 

70% N1 or greater ( turn on anti-ice and ignitors) 

200

What is the minimum speed on takeoff climb for 15 degrees of bank with flaps up ?

Vco + 30

200

What are the initial fuel flow peaks? 

300-680 pph before ignition and approximately 900 pph after ignition 

200

High Spd boom ext. max speed

same as clean


300

When does the IDG Failure light come on and off? 

ON: IDG cooler output temperature reaches 400 +/-10 degrees F or the oil px drops to 100 psi

OFF: oil cooler temp. decreases to 370 +/-10 degrees F or the oil px rises to 180psi

300

Enroute descents are based on what airspeed? 

Mach 0.77 until passing 31,800 and then 280 KIAS 

300

What is the worst engine to lose on takeoff? Why?

Outboard upwind. Outboard because of the longer moment arm, upwind because any rudder used to compensate for crosswinds reduces available rudder control for an upwind engine loss.

300

When only battery power is used during engine starts, what will be inoperative? ... and when will they be available? 

all engine oil pressure gauges and fuel flow gauges will be inoperative until a generator comes on line and 28V AC power is available


300

AC volts normal range

190-210

400
What controls external power application and protects the synchronizing bus from external power faults? 

The Bus Power Contro Unit (BPCU)

400

Speed brakes shall not be used any time below what altitude? 

1000 AGL 

400

When does the FMAC advance out of the takeoff logic mode? 

When the flaps are retracted to zero, landing data is run, or 15 minutes has elapsed 
400

when does the starter initiate automatic cutout and how long does it take? 

between 43%-45% N2. It takes 3-9 seconds to complete the cutout sequence

400

Cooling After 1st motor

10 minutes

500
Which buses are used to Distribute DC power? 

TR buses 

Switched DC bus 

Battery Bus 

500
When should you consider using 50 flaps for landing? 

stopping distance is critical 

RCR is 9 or less or 

when threshold speed is increased more than 20 kts for gusts 

500

What 4 things should the crew monitor on takeoff? 

(SAFE) 

Stab trim

Airspeed indicators

Fire/overheat warning lights 

Engine Instruments 

500
Damage to the starter can occur in N2 exceeds what with the starter valve open light on? 

63% N2

500

Cooling time between starts

60 seconds