Additionally:
For ground air start : only PART of the supplementary RR procedures :
Left ISLN Valve ............................................................ .............. CLOSE
Close Left Isolation valve to reduce duct leakage.
Duct pressure ............................................................ .............. OBSERVE
Observe duct pressure is minimum of 30 PSI (less 1 PSI per 1,000
feet of pressure altitude).
Autostart Switch ............................................................ ....................OFF
Engine No. 3 ............................................................ ....................START
Accomplish manual engine start etc...
On 744 there's usually plenty of ductpressure hot and high, if the APU runs normally, eg LTX: elev 9,200' ISA +20, our regular stop.
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