What was found
SNA - EMERGENCY LANDING - FLT 0653 - ON DESCENT INTO PHX EN ROUTE FROM SNA AIRCRAFT EXPERIENCED A FLAP LOCKOUT AND WOULD NOT EXTEND WHEN SELECTING FLAPS 1. MAINTENANCE REMOVED AND REPLACE FLAP POSITION INDICATOR PER T/C R1B27001. PERFORMED TRAILING EDGE FLAP BYPASS VALVE OPERATIONAL CHECK IAW F1B27013. OPERATIONAL CHECKS WERE GOOD. VENDORS PRETEST OF FLAP POSITION INDICATOR S/N 522 CONFIRMED REASON FOR REMOVAL, UNIT FAILED FOR TRANSMITTER POSITION DISAGREE ON R/H POSITION TRANSMITTER DIAL, ALSO FOUND LIGHTS INOPERATIVE. DISASSEMBLY OF UNIT FOUND R/H SYNCHRO OUT OF ADJUSTMENT AND LAMPS DS1, AND DS3 BURNT OUT. ADJUSTED SYNCHRO AND REPLACED BURNT LAMPS, FUNCTIONAL CHECK C/W IAW OEM 27-50-07, REV. 5.