As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE MASTER FIRE WARNING LIGHT CAME ON. VERIFIED NR 2 ENGINE AT FAULT. REDUCED POWER AND LIGHT WENT OUT. TESTED FIRE WARNING SYSTEM WHICH WAS SATISFACTORY. RESTORED POWER AND NO FURTHER INDICATION. GROUND INSPECTION REVEALED LOW PRESS PNEUMATIC DUCT LOOSE. TIGHTENED AND SECURED GLAND NUT. RAN ENGINE FOR 20 MINUTES AND SYSTEM CHECKED NORMAL. RETURNED AIRCRAFT TO SERVICE. (M)