Second failed shear coupling on Ovation2 GX 29-0363. First failure was at 950 TTIS, latest at 1450 TTIS.
No charging of BATs when on EMERG BUS at 2000+ RPM:
Confirmed with no visible rotation of SBY ALT when manually turning propeller (IO-550-G(7)B with B&C Specialty Products standby alternator):
This is what a failed shear coupling looks like:
And the new (style of) coupling which seems beefier than the old one:
Correct operation (+ve AMPS/charge) on EMERG BUS: