b737-200 adv
Trying to figure out a problem and am stumped.
The 737 engine bleed valves are AC powered from the respective AC Transfer Buses. The starter valves are engine side of the engine bleed valves, so the engine bleed valves need to be open to allow pneumatics to get to the starter valves.
If the engine bleed valves were closed and you didn't have AC power available (no apu or gpu) is there a alternate way to open the engine bleed valves to allow a start?