As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE: NA AUTONOMOUS POWER SUPPLY DOES NOT BITE TEST.R&R BOTH EMERGENCY PWR SUPPLY BATTERIES PER AMM 52-73-18 BITE TEST WORKS BUT NO GOOD. FAULTS THE UNIT AND NO OUTPUT SINGAL. R&R APSU PER AMM 52-73-18. BITE TEST GOOD. NO FAULTS NOTED. OK FOR SVC.