What was found
ON THE GROUND WITH 65% N1 THE LEFT DUCT PRESSURE WAS 33 PSI AND THE RIGHT WAS 53 PSI. GROUNDED - YES. ACCOMPLISHED T/C NG-36WC-00001 ENGINE BLEED AIR HEALTH CHECK NR 1 ENG NO DEFECTS NOTED. DURING CROSSOVER CK FOUND NR 2 ENG HAD HIGH DUCT PRESSURE, AND PRESSURE SPIKED DURING ENGINE ACCELERATION. ACCOMPLISHED BLEED AIR HEALTH CK ON NR 2 ENG PER T/C NG-36WC-00001, FOUND SCREW PROTRUDING FROM VALVE POSITION INDICATION ON PRSOV POSSIBLY INTERFERING WITH MOVEMENT. R&R NR 2 PRSOV PER AMM 36-11-04-000 /400-801, OPS / LEAK CK GOOD BOTH ENGINES PASS CROSSOVER CK REF AMM 36-11-00-710-801.