As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GNDED. CREW REPORTS MUSTY SMELL AT GATE. STRONGER ON TAKEOFF. FOUND APU CHIP DETECTOR LEAKING, REPLACED THE O RINGS & ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK. ACCOMPLISHED TASK CARDS 26L00021001, 26L00021004. DECONTAMINATION ACCOMPLISHED & NO SMELLS NOTED.