As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER T/O LAX, AFTER RAISING L/G BOTH SYS A HYD LOW PRESSURE LIGHTS ILLUMINATED FOR ABOUT 5-10 SEC. HYD FLUID SYS A FLUID WENT BELOW REFILL MARK FROM FULL AND CONTINUED TO DECREASE TO 1/2. AIRCRAFT DIVERTED TO PHX AND MADE AN UNEVENTFUL LANDING. REMOVED AND REPLACED A SYSTEM ISOLATION VALVE ASSY. LEAK CHECK OPS, CHECK GOOD PER BOEING M/M.