What was found
NR 2 AIR MANIFOLD FAIL ILLUMINATED AT 17,000 FT DURING CLIMB OUT WITH CLIMB POWER SET. FOLLOWED QRH PROCEDURE, LIGHT EXTINGUISHED WITH THROTTLE RETARDED BELOW 95%. PERFORMED NR 2 PNEUMATIC SYS DECAY CHECK IAW MM 36-00-01-5, SYS FAILED TEST. SHOULD BE 20 SECONDS TO DECAY FROM 20 PSI DOWN TO 15 PSI, IT ONLY LASTED 9 SECONDS. FOUND AFT CARGO HEAT JET PUMP VALVE BYPASSING INTERNALLY, REMOVED & REPLACED THE VALVE IAW MM 21-41-04-4. OPS CHECKED NORMAL, DECAY PASSED BY 30 SECONDS.