Cessna 402/402C/B379 Businessliner/Utiliner
Aircraft Equipment Problem Critical
Flight Crew Overcame Equipment Problem
Aircraft
IFR repo flight; approach cleared me for the visual XYL (short runway); I was in a left continuous turn keeping a jet in site landing on XYR; I had gone in range; and extended the gear.While turning base to final I decided to extend the next 'notch' of flaps when I heard a loud bang!/snap! and the aircraft rolled right approximately 60-70 degrees (total roll approximately 100 degrees) for a few very long) seconds; heading towards the bridge then the aircraft leveled.I told the tower there was something wrong with the flight controls and requested to land XYR; as XYL may be problematic if the flaps may have malfunctioned.I decided not to touch anything not to further the malfunction; the tower instructed me to make left traffic for RWY XYR; and the landing was uneventful.Upon reaching ops; I called in my times and asked Maintenance to meet me at the aircraft.I noticed the flap handle approximately 20 degrees but the indicator showed 0; the flaps where fully extended but loose as they could be pushed up.
Reporter stated that a post flight maintenance inspection revealed that the cable and chain system actuating the flaps failed.
C402 pilot reported aircraft rolled 60 degrees to the right on final approach when the next notch of flaps was selected.