What was found
NR 3 PNEU MANIFOLD FAILURE LIGHT ILLUMINATED INTERMITTENTLY SHORTLY AFTER T/O (NR 3 PNEU SUPPLY ON DUE TO WING ANTI-ICE REQUIRED FOR T/O). PHASE IS ACCOMPLISHED. QRH PROCEDURES COMPLETED. LIGHT WENT OUT IMMEDIATELY AS NR 3 PNEU SUPPLY SELECTOR WAS TURNED OFF. NR 3 PNEUMATIC PRESSURE DROPPED TO 5 PSI. FOUND TELESCOPING DUCT SEALS BLOWN. REMOVED AND REPLACED SEALS PER SMP. ALSO, REMOVED AND REPLACED ANTI- ICE SHUTOFF VALVE AND PNEU MANIFOLD FAULT COMP AS PRECAUTIONARY. TOOK ACFT TO HIGH POWER AND RAN ACFT PER JRH TO TAKEOFF POWER WHILE TESTING ANTI-ICE SYSTEM. NO FAULTS NOTED. POST RUN, NO FAULT BALLS TRIPPED ON MANIFOLD FAULT COMP. ALL WORK DONE IAW DC-10-30 TAFI 36-23-00.