As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RT ENG FIRE IND INTERMIT DURING CLM. S/D ENG AND ATB TO ATL.C/A FOUND 4 BOLTS LOOSE ON HPT NOZZLE COOLING DUCTS AT HPC CASE 230 AND 330 POSITION. TIGHTENED SAME. REINSTALLED RMVD LOOPS. CKD SECURITY OF ALL LOOPS. RAN ENG AT 90 PCT FOR 5 MIN AND 103 PCT FRO 5 MIN. ALL CKS GOOD.