Shutdown Procedure

Question 1

Why 3un engine for 3min before shutdown?

Answer 1

Thermally stabilize engine and reduce undercowl soak back temps.

Question 2

What thrust can be considered for idle thrust for this purpose?

Answer 2

Taxi thrust

Question 3

3min cooldown can be started when thrust begin reduced to idle for landing, under which circumstances?

Answer 3

IDLE reverse or NO reverse thrust used during landing rollout.

Question 4

Consequences of not using 3min cool down time?

Answer 4

Engine degradation

Question 5

Towing is needed after landing, actions and considerations?

Answer 5

NG steering lockout pin not installed and HYD A pressurized, change in ELEC of HYD power with tow bard connected can cause unwanted tow bar movement. If pin not installed, Sys A Hyd Pump switches OFF, verify that the Sys A pump low pressure lights are illuminated.

Question 6

APU extended time on ground, explain ?

Answer 6

If Airplane busses powered by AC Electrical power, position an AC powered fuel pump ON. Extends service life of APU FUEL CONTROL UNIT.

Question 7

Centre tank fuel pump on when?

Answer 7

fuel center tank more than 453kg.

Question 8

Can you operate center fuel tank pumps with flight deck unattended?

Answer 8

NO