SDR DXTA2013123005611

Service difficulty report · Fire Warning · Gulstm 200

Difficulty date: December 29, 2013
Submitted: January 2, 2014
Operation: Air carrier
Aircraft: N737QS
Make and model: Gulstm 200
Aircraft serial: 127
Aircraft time: 6,769 hours, 4,124 cycles
System (JASC): 2612 · Fire Detection
Part: Fire Warning
Condition: False Activation
Location: Apu Bay
Stage of operation: CR
How discovered: O
Nature of condition: N
Precautionary procedure: F, A

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

ENROUTE AT FL390, RECEIVED AN APU FIRE EICAS MESSAGE & AURAL ALARM. RAN CHECKLIST TO INCLUDE BLOWING FIRE BOTTLE. EICAS MESSAGE & ALARM CAME ON INTERMITTENTLY FOR DURATION OF FLIGHT. DECLARED EMERGENCY & LANDED. NO INDICATION OF FIRE WAS FOUND AFTER LANDING. REMOVED & REPLACED RELAY 135W, PRESS TO TEST SWITCH. APU FIRE LOOP DETECTOR, FIRE BOTTLE, & FIRE BOTTLE CARTRIDGES. SYSTEM OPS CHECKED GOOD. IAW MM 26-20-10. MM 26-15-10. MM 26-20-13.