As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN AUTO MODE HD PUMP CYCLES 2100 TO 3500 PSI FREQUENTLY (1:10 TO 1:30 BETWEEN RUNS DURING NORMAL TAXI) EMER ACC AT 3600 PSI. REMOVED AND REPLACED HYDRAULIC PRESSURE SWITCH IAW 29-10-45-04. OPS CHECK GOOD PN OFF/ON GPP1250-12 SN OFF 8506113 SNON 0625892. LK CK COMPLETED NO LEAKS FOUND.