The starter is disengaged, detached from the N2 rotor after starter cutout as confirmed by the start valve open light extinguished, that means no air is passing thru (the valve is pneumatically actuated).
Whenever a motoring is required after an aborted engine start, you must wait until the N2 reads 0% (jurassics), 20% (CL and NG) before re engaging the starter using the engine start switch. This is precisely to prevent damage to the starter.
Also, when in-flight starting an engine in a CL, using starter assist, the starter must not be engaged unless N2 reads less than 15%.
If your speed isnīt appropriate for a windmill start or if the engine's been shut down for the last hour (NG), a cross bleed start is going to be needed, which implies engagement of the starter.
Given the chance I'd go for a windmilling as it means a lot less workload and no packs need to be switched off.
hope it helps.
SW
Last edited by sudden Winds; 30th Aug 2011 at 19:59.
Reason: personal preference added