What was found
FOLLOWING CAS MSGS ILLUMINATED IN FLIGHT: SWPS FAULT AMS CTRL FAIL AP FAIL YD FAIL GSD2 FAIL SWPS ICE SPEED HSDB FAULT//SIGNOFF// PERFORMED GSD 2 OPERATIONAL CHECK AS PER AMM MPP 31-41-01- 710-801-A AND PERFORM FIM 31-42-00-810-812-A - FAILURE OF THE HSDB BETWEEN DATE CONCENTRATOR UNIT 1 AND DATA CONCENTRATOR UNIT 2. ALL TROUBLESHOOTING POINTED TO NO FAULT OR DISCREPANCIES AND THAT THE FAULT SIGN OFF: WAS TRANSITORY PER THE FAULT ISOLATION MANUAL. CALLED MCC WITH FINDINGSAND EMAILED EMBRAER TECH SUPPORT. PER EMBRAER TECH SUPPORT, PROCEED WITH ADD1T1ONAL TROUBLESHOOTING PER FAULT ISOLATION MANUAL 31-42-00-810-814-A. NO DISCREPANCIES OR FAULTS NOTED. PER EMBRAER TECH SUPPORT, RETURN THE AIRCRAFT TO SERVICE.