A B737-700 ACFT SUSTAINED LH AND RH LEADING EDGE FLAP DAMAGE DUE TO FLAPS RETRACTED WITH SPOILER LOCKS INSTALLED. FOUND AFTER TAXI TO GATE.

Narrative

I WAS HELPING PREPARE ACFT X TO GO TO WASH RACK FOR AN HCI WASH. I REMOVED BELLY PANEL BY WHEEL WELL; AND UNLATCHED BOTH MAIN GEAR WING PANELS (ACTUATOR ACCESS FOR CLEANING) PER T/C FOR PRE-WASH CRITERIA. WHILE I WAS DOING THIS; MY CO-WORKER WAS INSTALLING SPOILER LOCKS FOR ACFT APPEARANCE TO WASH. I THEN GOT A TUG AND TOWBAR AND HOOKED THEM UP TO THE ACFT TO PUSH OFF GATE. I NOTICED MY PARTNER WAS DONE FOR HIS PARTS OF GETTING ACFT WASH READY. I THEN SAW MY LEAD HEADING TO OUR GATE TO TAXI ACFT TO WASH RACK. I RETRIEVED FROM OUR PAPERWORK PACKAGE FOR ACFT X THE PRE-WASH PAPERWORK THAT ACFT APPEARANCE AND INSPECTION WOULD NEED. AS I WAS WAITING AT JETWAY; I SIGNED OFF THE BLANKS FOR TURNING ON HYD LOWERING FLAPS; RAISING SPOILERS; INSTALLING LOCKS; REMOVING BELLY PANEL; OPENING MAIN LNDG GEAR ACCESS PANELS; BECAUSE THE WASH CREW WON'T BEGIN TO WASH THE ACFT IF PRECEDING STEPS ARE NOT SIGNED. I DID NOT TURN HYD ON; DROP FLAPS; RAISE SPOILERS OR INSTALL SPOILER LOCKS; I JUST OBSERVED THAT FLAPS ARE DOWN; SPOILERS ARE UP AND RECALL SEEING INSTALLING SPOILER LOCKS SO I SIGNED THOSE BLANKS. ACFT WAS WASHED AND ARRIVED BACK AT GATE A COUPLE HRS LATER WITH FLAPS UP; WHICH I THOUGHT ODD BECAUSE NOBODY USUALLY DOES THAT; FLAPS 10-15 DEGS IS THE NORM. I THEN LEARNED L AND R FLAPS HAD HOLES IN THEM FROM SPOILER LOCKS. I THEN LEARNED A GUY ON OVERTIME FROM THE HANGAR STOWED FLAPS UP; AND TAXIED FROM WASH RACK TO THE GATE.