Engine Starting

Question 1

ENGINE START PROCEDURE

Answer 1

FO-START SWITCH TO GROUND

• Hand on thrust lever until 20% N1 (should have N1 and OIL PRESSURE INCREASING)
• N1 rotation seen and N2 at 25% (max motoring 1% 5 secs/ min 20%)
• START LEVER IDLE (start a clock 10 secs EGT, 2^nd Start leave clock running 3.30/5.30)
• Check ENG VALVE and SPAR VALVE
• ENG DISPLAY N1 3-4%
• FUEL FLOW

N1

N2

EGT

30-32%

300

10%

40-42%

400

15%

50-52%

500

• 56% N2 start switch to AUTO “STARTER CUTOUT”
• STABLE IDLE
  
  • Stable idle is when EGT start REDLINE disappears

Question 2

STABLE IDLE PARAMETERS

Answer 2

N1

2x

EGT

4xx

FUEL FLOW

0.3

N2

6x

OIL PRESS

25 (35)

OIL TEMP

80 (35)

OIL QTY

15

Question 3

ABORTED ENGINE START PARAMETERS

Answer 3

Do the “Aborted Engine Start” NNC for any of the following

• No or Slow N1 or N2 after EGT increase (HUNG)
• No OIL pressure by stable IDLE
• No EGT within 15 secs of start lever to idle (WET)
• EGT nears or exceeds start limit (HOT)