As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENG 2 FIREXBTL B FAIL. ENG 1 FIREXBTL B FAIL. REMOVED FROM SERVICE. FOUND FAULT CODE 26210044UT1 AND COMPLIED WITH FIM TASK 26-21-00-810-810-1 STEPS 1 THROUGH 6 (D) FAULT REMAINS. C/W E175 FIM TASK 26-21-00-810-810-A. STEP 6 G-I AND EA E-26-0002, TCPS INSULATION TEST FAILED. REMOVED & REPLACED ENGINE FIRE EXTINGUISHING BOTTLE B IAW E175 AMM 26-21-03-000/400-801-A. OPS TEST GOOD. FAULT CODE NO LONGER ACTIVE. RETURNED TO SERVICE.