Same as above.
PW installed on ours, the normal starting is longer. 10 or 20 seconds which occasionally feels like eternity.
The pre-start slow crank - cooling - scheduled by FADEC becomes an additional step of the automated sequence, required time (if any) is displayed on EIS after energising the circuits.
For us, no cooling at all is a seldom occurrence, typically somewhere between 30 sec to almost 2 mins is needed.
In theory, it is not a problem at all and the delay is insignificant. Technically true but on a busy ramp you become an obstacle. Especially on a delicately timed day with congested bays, de-icing in progress and everybody's CTOT running out.
The mitigating DUAL COOLING is an additional button. After the first engine master SW is selected on, a paralell crank is commanded at once for both sides. So for starting the second engine the cooling is already done.
Dual Cooling itself has an operational envelope, think oil temperature, and sometimes you are denied. On a cold morning for example.
Last edited by FlightDetent; 23rd Feb 2022 at 01:45.