As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE WORKING MEL 28-12B- FOUND #1 REFUEL TANK IND. NOT GOING INTO TESTS MODE. GROUNDED - YES. RMVD AND INSTALLED NEW REFUEL #1 TANK IND. REF 28-21-00-211-801. NO DEFECTS FOUND. ACCOMPLISHED INSTALL TES PER STEP G. REF 28-41-61-400-801. ALL TESTS PASSED.