What was found
WHEN COMPLETING REPAIRS TO FLAP SYS AFTER PILOT ENCOUNTERED A FULL FLAP SPLIT WITH RT FLAP ALL THE WAY RETRACTED AND LT FLAP AT FULL EXTENSION, FOUND RT FLAP DOWN CABLE P/N 5000008-62 FRAYED AND BROKEN 2.5 INCHES INBD OF WHERE FLAP PRE-SELECT INSTALL CABLE CLAMP WAS INSTALLED. CABLE FRAYED AND BROKE BETWEEN DETAIL B NR 39 PULLEY BRACKET AND DETAIL C NR 14 CABLE CLAMP. WHEN THIS HAPPENED, FLAP WENT INTO FULL RETRACTION AND PULLED PRE-SELECT FLAP IND INTO FULL UP POSITION WHICH MADE FLAP SELECTOR USELESS. PILOT WAS ON DESCENT FOR LANDING AND THIS PITCHED ACFT INTO A STEEP RT BANK. PILOT REGAINED CONTROL BY GIVING FULL LT AILERON RUNNING ENGINES TO FULL POWER AND RETRACTING LANDING GEAR. UNEVENTFUL LANDING.