As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ENGINE START OIL PRESSURE REMAINED AT ZERO PSI WITH A LOW OIL PRESSURE LIGHT WHEN ENGINE REACHED IDLE. SHUT DOWN ENGINE. INVESTIGATION REVEALED THE ENGINE DRIVEN HYDRAULIC PUMP LOCKED UP DUE TO A PIECE OF METAL THAT HAD DETACHED FROM THE DIFFUSER CASE THAT SUPPORTS THE NR3 MAIN BEARING. GOT INTO THE OIL SYS, SLIPPED BRG THE INLET SCREEN TO THE PUMP. (K)