As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THIS AIRCRAFT HAS HAD A LONG HISTORY OF WATER IN THE FUEL. AD 84-10-01 ADDRESSES HOW TO DETERMINE HOW MUCH WATER AN AIRCRAFT WILL OR IS HOLDING, BUT DOES NOT SOLVE THE PROBLEM. NEW 'ZERO' RING (SEVERAL SETS) DID NOT HELP. WATER STILL SEEPED IN AROUND THE CAP. NEW CAPS AND PANELS FROM MONARCH AIR DEVELOPMENT WERE INSTALLED PER THEIR STC AND NO MORE WATER IN THE TANKS.