What was found
SNA/SMF - FLT 0230 - AIR TURN BACK. POWER LOSS OF I.R.U., F.M.C.S., AND SYMBOL GENERATOR. RAW NAVIGATION INFORMATION WAS ALSO LOST. CONTRACT MAINTENANCE AND A.W.A. TECHNICIAN SENT TO T/S. DID BITE CHECK ON ALL FAILED COMPONENTS, NO HARD FAULTS. RESET A/C POWER AND ALL SYSTEMS OPS NORMAL. T/S IN AIR MODE AND ENGINES RUNNING. A/C RETURNED TO SERVICE. (X)