As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN (LEFT, RIGHT, AND CENTER) HYDRAULIC SYSTEMSC HYD QTY DECREASED TO ____. SYSTEM DEPRESSURIZED AND LEAK CONTINUED .26RF FOUND UP LINE B-NUT AT MLG SELECTOR/BYPASS VALVE LOOSE. SECURED LINE PER AMM 32-31-04. PERFORMED LEAK CHECK, NO LEAKS NOTED. OK TO CONTINUE.