As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT RETURNED TO PLATFORM DURING ENGINES STARTING, LOW PNEUMATIC INDICATION PRESSURE IN THE APU. THE ENGINES WERE STARTED WITH EXTERNAL PNEUMATIC PLANT IAW MM 49-50-00 AND THE FAULT CODE 495 031 00 WAS SHOWN. AT MEX, THE FIM PROCEDURE WAS PERFORMED IAW FIM 49-55 TASK 807, TESTED CORRECT.