What was found
NEAR TOP OF CLIMB, NR 3 AIR SYS OFF LIGHT ILLUMINATED. NR 3 DUCT DISPLAYED RED MOMENTARILY UNTIL AUTO SHUTDOWN. DIVERTED DUE TO INABILITY TO USE WING ANTI-ICE VALVE - INOP CLOSED. DO NOT USE NR 3 PNEUMATIC SUPPLY SYSTEM." DECAY CHECK C/W PER M/M 36-00-01-5 PASS PER LIMITS CHECKED FAULT ISOLATION PANEL NO BALLS TRIP, ONLY FAULT WAS PRV. RELEASED FOR SERVICE PER MEL/CDL: 36-12-01-A CATEGORY: C EXPIRATION: 25DEC07 "MEL 36-12-01-A: NR 3 PNEUMATIC PRESS REGULATOR VALVE.