Narrative:

During climb and level off at 25000' MSL we noted a slight rumbling sound and began having difficulty trimming the medium large transport in roll and yaw. We noted then that the right outboard spoiler was 'floating' up 10-15 degrees (20 degrees normal when selected in flight). The left outboard was also 'floating' very slightly. Isolating the controling hydraulic system was ineffective, so we returned to the originating airport, orl. Aircraft was fully ctlable in all configns of approach and landing, and no further difficulties encountered. Maintenance found a broken hydraulic return line which caused the #1 system spoiler problem.

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Original NASA ASRS Text

Title: ACR MLG HAD BROKEN SPOILER RETURN LINE CAUSING TRIM DIFFICULTY AT CRUISE. WHEN UNABLE TO ISOLATE FLT CREW DECIDED TO RETURN LAND.

Narrative: DURING CLIMB AND LEVEL OFF AT 25000' MSL WE NOTED A SLIGHT RUMBLING SOUND AND BEGAN HAVING DIFFICULTY TRIMMING THE MLG IN ROLL AND YAW. WE NOTED THEN THAT THE RIGHT OUTBOARD SPOILER WAS 'FLOATING' UP 10-15 DEGS (20 DEGS NORMAL WHEN SELECTED IN FLT). THE LEFT OUTBOARD WAS ALSO 'FLOATING' VERY SLIGHTLY. ISOLATING THE CTLING HYD SYS WAS INEFFECTIVE, SO WE RETURNED TO THE ORIGINATING ARPT, ORL. ACFT WAS FULLY CTLABLE IN ALL CONFIGNS OF APCH AND LNDG, AND NO FURTHER DIFFICULTIES ENCOUNTERED. MAINT FOUND A BROKEN HYD RETURN LINE WHICH CAUSED THE #1 SYS SPOILER PROB.

Data retrieved from NASA's ASRS site as of August 2007 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.