As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HYD MASTER CAUTION AND SYSTEM A LOW PRESSURE LIGHTS ENG 1, ELECT 2 AND OVERHEAT LIGHTS ILLUMINATED FOR APPROXIMATELY 30 SECONDS AFTER GEAR RETRACTION. GROUNDED - YES. AIR TURNBACK -- REMOVED AND REPLACED #1 ENGINE HYD SYS "A" PUMP REF B737-800 AMM 29-11-11. PERFORMED LANDING GEAR EXTENSION/RETRACTION TEST PER AMM 32-32-00. OPS CHECK GOOD AT THIS TIME. NO FAULT LIGHTS ILLUMINATED. (REF TSR714064, TSR714068, TSR714068, TSR714066, TSR714067).