As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING TASK CARD # 31-005-00 FOUND ACTIVE MAINTENANCE MESSAGE 21-55341 FOR IASC-R (AIR COND) HAS AN AIR/GND DISCRETE INPUT ERROR. GROUNDED - YES. PERFORMED IFIM TASK 21-51-00-810-835, PERFORMED IBIT FOR RH AIR CONDITION SYSTEM TEST. TEST PASSED. CLEARED MAINTENANCE MESSAGE AND LATCHED MESSAGE.