A319
Maintenance Airframe; Maintenance Powerplant
Aircraft Equipment Problem Critical
Flight Crew Overcame Equipment Problem; General Maintenance Action
Aircraft
An Airbus 319 was on approach and had a failure of the flap drive system.
An Airbus 319 was at base for a MLG change that included a job called RIB 5; which meant a torque tube was removed for the machine shop to work on RIB 5 Bushings. After the RIB 5 job was completed; the RIH MLG was installed; which also meant the torque tube could now be installed. As stated on job card; I began to install torque tube 6258 cm; which ended up being completed by another Mechanic and signed for. The outcome was that torque tube separated at the bolted flange of tube upon landing of aircraft.
It appears that some of the trailing edge flap torque tube hardware at one coupling was missing. It is impossible to determine if the hardware failed; became loose; or was not secured properly at a previous maintenance visit.