What was found
CPR - FLT 8788 - AFTER TAKEOFF, WHEN RETRACTING FLAPS WE GOT A DISAGREEMENT AND ASYMMETRY. AIRTURNED BACK TO CPR. SUSPECT ICE AND WATER CONTAMINATION DUE TO WASHING AIRCRAFT AT OVERNIGHT IN CPR. DE-ICED THE AIRCRAFT, CHECKED AND CLEANED CANNON PLUGS. FLAP SYSTEM OPERATIONAL CHECKED GOOD. (M)