As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA FLIGHT NR 2104, AFTER ENGINE START NOTICED LOW FLOW OUT OF NR 1 BLEED, ISOLATED BOOT SYSTEM AND NOTED NR 1 DEICE PRESSURE AT 10 PSI WHILE NR 2 WAS 18 PSI WITH ENGINES OUT OF FEATHER AND POWER LEVERS JUST ABOVE DISC. MAINTENANCE REPLACED NR 1 AND NR 2 55 AND 65 HIGH PRESSURE SWITCHES. REPLACED 2121-K6 RELAY, DURING TROUBLESHOOTING WIRING. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.