What was found
OVER KGUG FOR APPROXIMATELY 3 MIN. FO INBOARD DU VTK FLAGS LOSS OF FO TERRAIN/GPWS INFO. FO OUTBOARD DU LDG ALT FLAG CAPTAINS ANP DISPLAYED GREATER THAN 9.0. AFTER APPROXIMATETLY 3 MIN ALL INDICATIONS RETURNED TO NORMAL. GROUNDED-YES. ACCOMP FMC BITE, BOTH FMC'S SHOW R FMC FAIL. ACCOMP CDS BITE, BOTH SHOW R FMC FAILED. ACCOMP DFCS FLT FAULT REVIEW SHOWS R FMC NO DATA. REPLACED R FMC WITH SERVICEABLE ONE. ACCOMP FMC DATA LOAD FROM L TO R, VERIFIED SOFTWARE. ACCOMP FMC PERFORMANCE FACTOR ADJ. ACCOMP FMC OPERATIONS TEST, TEST PASS, REF B737-900 AMM 34-61-02-400-801 AND B737-900 FIM 34-61 TASK 801, 31-62 TASK 801 & 22-11 TASK 801.