As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE NR 2 HYDRAULIC PUMP FAILED WHEN LANDING GEAR WAS EXTENDED. SUSPECT AIR WAS DRAWN INTO HYDRAULIC SYSTEM BY BACKWARDS WINDMILLING PROP. BLED SYSTEM OF AIR. REMOVED AND REPLACED NR 2 ENGINE DRIVEN HYDRAULIC PUMP DUE TO HAVING OPERATED WHILE CAVITATED. GROUND CHECK OK. ACFT RETURNED TO SERVICE. (W)