What was found
FLAPS FAILED AT 15000 FT ON APPROACH. EMERGENCY DECLARED. DID NOT LAND OVERWEIGHT. DID NOT BRACE. LANDING SUCCESSFUL WITHOUT ISSUES. NO FURTHER INFORMATION / ONCE THE FLAP TORQUE TUBES WERE EXPOSED WE FOUND THAT THE TORQUE TUBE AT WS231.00-WS264.00 ON THE LH SIDE WAS NOT CONNECTED TO THE ANGLE GEARBOX. INSTALLED THE 3 LH OUTERMOST TORQUE TUBES IAW CRJ 900 AMM 27-52-01-400-806/807/808/809. PERFORMED MECHANICAL OPERATION OF THE FLAPS WITH BPSU CONNECTED IAW CRJ 900 AMM 27-52-00-864-803. PERFORMED THE ELECTRICAL RIGGING OF THE FLAPS SYSTEM IAW CRJ 900 AMM 27-52-00-820-802. OPS CHECK GOOD.