What was found
APU FAULT LIGHT ILLUMINATED DURING APU START AT FL380. CSS REQUIRED ON DISPATCH RELEASE. ACFT GROUNDED. REPLACED APU START CONVERTER UNIT REF MM:49-41-61, OPS CK NORMAL.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
APU FAULT LIGHT ILLUMINATED DURING APU START AT FL380. CSS REQUIRED ON DISPATCH RELEASE. ACFT GROUNDED. REPLACED APU START CONVERTER UNIT REF MM:49-41-61, OPS CK NORMAL.