As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE C/W PIPER SB 998A BY REPLACING ELEVATORS, IT WAS NOTED THAT PA 31-350'S WITH STC SA 1151S0 ARE BALANCED TO PA 31-325 SPEC PER SS MANUAL TABLE IV-I. PIPER WILL NOT ADD THIS INFO TO SB. SUBMITTER SUGGESTED AN AD THAT REQUIRES THIS INFO ON A PLACARD AT THE BALANCE WEIGHTS.