Narrative:

On approach; the crew noted that the flap circuit breakers (cbs) were popped; landing was uneventful. After a day of waiting on parts and changing printed circuit boards (pcbs); (normal action for such a squawk). Technicians inspected the flaps and noted the following:continued investigation into flap issue on [the] aircraft; a falcon da-2000. After removing right wing inboard (ib)/ outboard (ob) flap junction fairings; found ob flap impacting flap interconnect control rod and trailing edge of the ob flap below the ib flap. Upon comparison to left wing found ib flap travel greater than ob flap. Removed trailing edge panel on right wing; between ib and ob flap and found torque tubes disconnected. Only speculation; but when the aircraft recognized a [difference]; it stopped the flap movement; but because ob flap was disconnected; it continued to spool down for some reason where it impacted ib flap interconnect rod. Bolt in flap torque tube appears to be fully installed in clamp with locking washer properly installed. I suspect when torque tubes were last removed the bolt was not engaged in the groove on the spline upon reinstallation therefore allowing the torque tubes to migrate apart over time. [Recommend] [clearance] (okay to close) and final required inspection items (rii) inspections should be followed.

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Original NASA ASRS Text

Title: A Maintenance Controller describes the results of effective maintenance troubleshooting after a Dassault-2000 flight crew reports their flap Circuit Breakers (CBs) had popped on approach. Technicians found flap torque tubes had disconnected at the right wing trailing edge between the Inboard (IB) and Outboard (OB) flaps.

Narrative: On approach; the crew noted that the flap Circuit Breakers (CBs) were popped; landing was uneventful. After a day of waiting on parts and changing Printed Circuit Boards (PCBs); (normal action for such a squawk). Technicians inspected the flaps and noted the following:Continued investigation into flap issue on [the] Aircraft; a Falcon DA-2000. After removing right wing Inboard (IB)/ Outboard (OB) flap junction fairings; found OB flap impacting flap interconnect control rod and trailing edge of the OB flap below the IB flap. Upon comparison to left wing found IB flap travel greater than OB flap. Removed trailing edge panel on right wing; between IB and OB flap and found torque tubes disconnected. Only speculation; but when the aircraft recognized a [difference]; it stopped the flap movement; but because OB flap was disconnected; it continued to spool down for some reason where it impacted IB flap interconnect rod. Bolt in flap torque tube appears to be fully installed in clamp with locking washer properly installed. I suspect when torque tubes were last removed the bolt was not engaged in the groove on the spline upon reinstallation therefore allowing the torque tubes to migrate apart over time. [Recommend] [clearance] (okay to close) and final Required Inspection Items (RII) inspections should be followed.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.