As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WOULD NOT PASS THE BIT CHECK ON PREFLIGHT. CONTACTED NEAREST AUTHORIZED RAYTHEON SERVICE CENTER FOR SERVICE OF THE NITROGEN BOTTLE, BOTTLE WAS JUST AT THE BOTTOM OF THE GREEN. THE THOUGHT WAS THAT IT CAUSED A LOW PRESSURE INDICATION AND MADE THE BIT CHECK FAIL. THE PROBLEM THEN WENT AWAY. AIRCRAFT RETURNED TO SUS WITH NO PROBLEM.