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b744FPEK
8th Oct 2010, 15:55
question NO.1

why the normal engine start sequence is NO.2 and NO.1 ?
(i wish this is not a simple question .)




question NO.2(solved)

BOAC
8th Oct 2010, 15:56
Try 'search'?

B737-pilot
8th Oct 2010, 16:18
Apu available you can start in any order. The acostumed order is #2 then #1.

When you have to start with external air source, supp procedure states the order #1 then engine 2, this is due to the ducting of the external air source.

reivilo
8th Oct 2010, 17:30
When you have to start with external air source, supp procedure states the order #1 then engine 2, this is due to the ducting of the external air source.
To be exact it is to prevent the external air source + engineer sucked into nr. 2 engine. I theory nr. 2 engine could be started first from the external air sorce. ;)