As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENG BLEED TRIP OFF LIGHT CAME ON AFTER T/O. RESET, NO HELP. FOUND HI STAGE REG CONTROLING HI STAGE VLV TO STAY OPEN, SLIGHTLY CAUSING PRSOV TO TRIP. PERFORMED PNEU SYS HEALTH CHECK EA 12-467086-12 REV B FOUND HS REG BAD NOT SHUTTING OFF. HIGH STAGE SYS REPLACED HS REG. ALSO FOUND PRSOV REG WIRE SHORTING TO BASE, REPLACED PRS REG HIGH STAGE SYS AND PRSOV NOW TEST GOOD.