A dc-10 flight crew took appropriate QRH actions when they received a fire warning on the number two...

Narrative:

When cleared to taxi into position and hold runway 25R we received a #2 engine fire indication. We complied with the QRH including firing a fire bottle. We also called for crash fire rescue equipment as an added precaution. The #2 engine fire system had an MEL for loop B inoperative and the switch was in the proper position locking out loop B per MEL. As a result there was only had one operable loop on that engine. After the bottle was dispensed and the fire light extinguished we tested the fire detection system and it tested ok for all engines with the exception of the locked out loop. Crash fire rescue equipment scanned the engine with a heat signature device of some sort and confirmed there was no fire. Several minutes later we received a second fire warning on #2. Fire indications remained on even with maintenance on board at the gate.

Original NASA ASRS Text

Title: A DC-10 flight crew took appropriate QRH actions when they received a fire warning on the number two engine as they taxied into position for takeoff. The warning was ultimately determined to have been false.

Narrative: When cleared to taxi into position and hold Runway 25R we received a #2 engine fire indication. We complied with the QRH including firing a fire bottle. We also called for CFR as an added precaution. The #2 engine fire system had an MEL for LOOP B INOP and the switch was in the proper position locking out LOOP B per MEL. As a result there was only had one operable loop on that engine. After the bottle was dispensed and the FIRE light extinguished we tested the FIRE DETECTION SYSTEM and it tested OK for all engines with the exception of the locked out loop. CFR scanned the engine with a heat signature device of some sort and confirmed there was no fire. Several minutes later we received a second fire warning on #2. Fire Indications remained on even with maintenance on board at the gate.

Data retrieved from NASA's ASRS site as of July 2013 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	1016697
Time
Date	201206
Local Time Of Day	0001-0600
Place
Locale Reference	LAX.Airport
State Reference	CA
Aircraft 1
Make Model Name	Widebody Low Wing 3 Turbojet Eng
Operating Under FAR Part	Part 121
Flight Phase	Taxi
Flight Plan	IFR
Component
Aircraft Component	Powerplant Fire/Overheat Warning
Person 1
Function	First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Critical

A dc-10 flight crew took appropriate QRH actions when they received a fire warning on the number two engine as they taxied into position for takeoff. The warning was ultimately determined to have been false.