What was found
AIRCRAFT WING ANTI-ICE SET UP FOR USE ON TAKEOFF, ABOUT 10 TO 15 SECONDS AFTER LIFT OFF. NR 1 MANIFOLD FAIL LIGHT ILLUMINATED. TURNING OFF WING ANTI-ICE TURNED OFF MANIFOLD FAIL LIGHT. TROUBLESHOT SYSTEM FOUND NR 5 LEFT HAND SLAT PICCOLO TUBE OUTBOARD END LEAKING. REMOVED PICCOLO TUBE FROM NR 5 SLAT, REPAIRED AS PER ENGINEERING AUTHORIZATION 8-3010-32015, INSTALLED IN AIRCRAFT. PRESSURE CHECK GOOD, OPERATED SLATS AND WING ANTI-ICE SEVERAL TIMES AND FUNCTIONAL CHECK WAS GOOD.