As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHORTLY AFTER TAKEOFF ENG NR 1 LOW PRESS HYD LIGHT ILLUMINATED. QRH PROCEDURE ACCOMPLISHED. A SYS QTY SHOWS 106% & PRESS STABILIZED AT 2960. INFLIGHT QTY DROPPED TO 97% ON LANDING. R & R NR 1 ENG HYD PUMP & SEAL. NO LEAKS NOTED AT THIS TIME. ACFT OK TO CONTINUE SERVICE IAW AMM 72-60-00 PBLK 201 & 29-11-11-410-801-001.