Hi All, I wonder if anyone can help me with this question. When i set up to have an engine fire in any of the 737's, I get the alarm bell and i pull the fire handle for the relevant engine/APU. The question is. When i pull the handle, should it shut down that engine or do i have to do it. The reason i ask this, is that on my install if i pull the handle the engine keeps running as normal. However if i do this with the APU it shuts down. please can someone tell me if this is right or if it is not simulated. or if it is right and that after the alarm i have to shut the engine down. Many thanks Adrian Storr.

This is from the B737 Technical Page: http://www.b737.org.uk/fireprotection.htmDon't know if its modeled in PMDG, but from what it says, the engine SHOULD shut down. There are two fire detection loops in each engine. Failure of both loops in one engine will illuminate the FAULT light. The individual loops can be checked by selecting A or B on the OVHT DET switches. Fire switches will unlock in the following situations:Overheat detected Fire detected During an OVHT/FIRE test Pressing manual override buttons Pulling a fire switch will do the following:Arm firing circuits Allow fire switch to be rotated for discharge Close engine fuel shut-off valve. Trip the associated GCR (i.e. switches off the generator) Close hydraulic supply to EDP & disarms its LP light (Not if APU) Close engine bleed air valve (If APU will also close air inlet door) Close thrust reverser isolation valve (Not if APU)

Hi Adrian,I don't know how long you left the fire handle pulled but it does not imediately shut down the engine. The fuel valve is on the front spar and there's about 15 feet of line to empty going to the engine and this takes time dependant on engine power setting. I've never tried just using the fire handle to shut an engine down on the PMDG so can't confirm your finding. Also the proper procedure for an engine fire is to place the start lever to cutoff before pulling the fire handle. This ensures immediate engine shut down. The following is the engine fire check list:http://www.telusplanet.net/public/jrberg/p...gine%20fire.JPGhttp://www.telusplanet.net/public/jrberg/p...ine%20fire1.JPGhttp://www.telusplanet.net/public/jrberg/p...ine%20fire2.JPGCheers,JohnBoeing 727/737 & Lockheed C-130/L-100 Mechanichttp://www.precisionmanuals.com/images/forum/ng_driver.jpg

>The fuel valve is on the front spar and there's about>15 feet of line to empty going to the engine and this>takes time dependant on engine power setting.Wouldn't the high pressure fuel (shutoff) valve in the HMU also close when you pulled the fire handle? (leaving only a few feet of narrow gauge fuel line to feed the engines). i.e. basically no fuel at all.I'd say the engine would shut down almost immediately.Cheers.Ian R>

Yes, you are correct. Getting my types mixed up ;-)Regardless, the proper procedure for an engine fire is start lever to cutoff before pulling the fire handle.Cheers,JohnBoeing 727/737 & Lockheed C-130/L-100 Mechanichttp://www.precisionmanuals.com/images/forum/ng_driver.jpg