As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HYDRAULIC PRESSURE GAUGE READ ZERO ON LANDING CHECK. FLAPS AND LANDING GEAR EXTENDED NORMALLY. GAUGE WAS SEEN TO FLUCTUATE BETWEEN NORMAL TO 1000 PSI TO ZERO PSI ON APPROACH. BRAKES AND THRUST REVERSERS OPERATED NORMALLY. GAUGE READS ZERO DURING TAXI. CREW DECLARED AN IFE AS A PRECAUTION. MAINTENANCE REPLACED THE HYDRAULIC PRESSURE TRANSDUCER. OPS CHECK AND LEAK CHECK PERFORMED SATISFACTORILY. (S)