As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOTH DUCT PRESSURE NEEDLES FLUCTUATE BETW 20-28 PSI WHILE ON APU BLEED AIR ON THE GROUND. GROUNDED - YES. (RESOLVED ON W/O: 1974919 TASKCARD: N/R-00001 ) FOUND FAULT MESSAGE 49-52192. "IGV ACTUATOR LVDT SHOWS CIRCUIT FAILURE" REMOVED AND REPLACED APU IGV REF AMM 49-52-12. LEAK AND OPS CHECK GOOD. A/C RELEASED FROM MEL 49-52-01A. MAINTENANCE PROCEDURES REVERSED SEAMC DAVE NOTIFIED C/N 24046931 REMOVED. GROUND VERIFICATION SUCCESSFUL. TWO C/B'S PULLED AND RESET.