As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MOMENTARY APU FIRE INDICATION. PERFORMED GVI AROUND APU, NO DEFECTS FOUND. DEFERRED APU, M PROCEDURES COMPLIED WITH IAW 49-1. FOUND APU FIRELOOP CHAFFING AGAINST HOT SPOT ON ENGINE. REMOVED AND REPLACED APU FIRELOOP IAW AMM 26-12-01. OPS CXK GOOD. MEL 49-01 IS RESTORED.