As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON THIS DATE - BRACKET PN: 3888525.2 UTILIZED TO ATTACH IGNITION UNIT TO HONEYWELL APU 36-150[CL] FOUND TO BE CRACKED - SUSPECT POSSIBLE VIBRATION ISSUE. DISCOVERED DURING REMOVAL OF IGNITION UNIT. SECOND REPORT SENT. ISSUE NOTED ON TWO SEPARATE AIRCRAFT.