What was found
UPON STARTING APU RECEIVED "APU BTL LO" CAUTION MESSAGE. REPLACED APU FIRE BOTTLE IAW AMM 26-22-07. OPS CHECK GOOD. P/N 897889-2, S/N OFF 6098ZEL, P/N 897776-01, S/N OFF 01842.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
UPON STARTING APU RECEIVED "APU BTL LO" CAUTION MESSAGE. REPLACED APU FIRE BOTTLE IAW AMM 26-22-07. OPS CHECK GOOD. P/N 897889-2, S/N OFF 6098ZEL, P/N 897776-01, S/N OFF 01842.