As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING T/C 31-005-00 " SCHEDULED MAINTENANCE TASK DISPLAY SYSTEM "FOUND FAULT" BLEED PM SENSOR R1" IN SCHEDULED MAINTENANCE TASK MESSAGES. GROUNDED - YES. FOUND MAINTENANCE MESSAGE 36-21021 UNDER EXISTING FAULTS. FOLLOWED B737-9 IFIM TASK 36-21-00-810-804. FAULT CLEARED DURING INITIAL EVALUATION. AIRCRAFT OK FOR SERVICE AT THIS TIME.