What was found
ON DESCENT, "GEN 2 OFF" CAS MESSAGE DISPLAYED. WE RAN THE QRH AND WERE UNABLE TO GET THE GENERATOR TO COME BACK ONLINE. WHEN THE GEN WENT OFFLINE IT TRIPPED OFF THE STAB TRIM CH1 AND MACH TRIM. THE "AP PITCH TRIM" AND NOSE DOWN TRIM CAS MESSAGES DISPLAYED. THEY ALL EXTINGUISHED WHEN WE GOT THE STAB TRIM AND MACH TRIM RE-ENGAGED. RIGHT SEAT PFD AND MFD MOMENTARILY WENT OFFLINE 3 TIMES BUT CAME BACK AFTER ABOUT 3-5 SECONDS. REMOVED RT ENG IDG & INSTALLED OVERHAULED IDG ON RT ENG IAW AMM 24-11-01-000-01, & 24-11-01-400-801. OPS CHKD GOOD.