As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PART OF FITTING THAT GOES INSIDE 303 HOSE BROKE BEFORE IT WAS SCREWED ALL THE WAY IN. IT WAS NOT CROSS-THREADED. IT BROKE AT THE END OF THE THREADS. THREE FITTINGS BROKE IN A ROW. ALL AEROQUIP FITTING TAGS WERE HAND WRITTEN 491-4. DIAMETER OF BREAK .253 INCH. FITTINGS WERE PURCHASED FROM AUSCO COLLEGE PARK, GA.