As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX FLIGHT NR 2107, 18 PSI BLEED AIR INDICATES 10 PSI WITH POWER LEVERS AT FLIGHT IDLE. INSTALLED NEW 55 AND 65 PSI SWITCHES IN BOTH RIGHT AND LEFT NACELLES IAW AMM 30-10-00-720-001. GROUND RAN BOTH ENGINES. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.