RWM
The 146 does have electric starters.inboard engines have hyraulic pumps and the outboard has the generators.
TCAS11,
Correct !Normal start requires 2 tru"s for engines (only 1 required for the apu).As you have stated and are probally correct it possibly had a dud TRU.Due to the various configurations of batteries (1,2 or military specs) and TRU's (2 or 3)any-one could have caused the hiccup.