What was found
TEB - WHILE IN-FLIGHT, LEFT ALTERNATE BOOST PUMP FAIL LIGHT ILLUMINATED. ON GROUND, MAINTENANCE FOUND PUMP INOPERABLE AND WIRE Q127A8 CHAFED AND ARCING ON DUCT P/N 1159AC-20507-1 IN RT WING ROOT. REPLACED WIRE Q127A8 AND THREE OTHERS IN WIRE BUNDLE W300. RE-ROUTED BUNDLE BACK TO NORMAL LOCATION, WIRE BUNDLE WRAPPED FOR PROTECTION (TEFLON SPIRAL). DUCT P/N 1159AC-20507-1 REPLACED.