As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 2138, AFTER ENGINE START THE NR 2 STANDBY HYDRAULIC PRESSURE SHOWS ZERO WITH THE SWITCH IN THE NR 2 POSITION. AIRCRAFT RETURNED TO THE GATE. MAINTENANCE RESET THE CIRCUIT BREAKER FOR THE SYSTEM. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE. NO PARTS REPLACED.