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Document title: It’s a story … of a 70,000 PPH fuel flow (old school) - F-16.net - The Ultimate F-16 Reference
Original URL: http://www.f-16.net/f-16_forum_viewtopic-t-7510-sid-3913f4d2385e8fc6d4e35a35c92ea26f.html
Printed on: 18 November 2008

Forum: F-16 Procedures

It’s a story … of a 70,000 PPH fuel flow (old school)



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VarkVet
PostPosted: Feb 17, 2007 - 08:46 AM Reply with quote Back to top
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You know modern jets aren’t fun anymore, you change engines and idle leak and ops is all you get.

Back in the day at RAF Upper Heyford (F-111E/TF30 P-3’s) we had some unique problems. One of them was the AB fuel control let loose somewhere down the line. You snap to mil and everything is cool. Go into zone 1 and everything is still cool. Go into zone 2,3,4 and then 5 and then sh*t happens. After cooking in zone 5 for about 30 seconds all hell breaks loose … nozzle full open and fuel flow rapidly jumps from 34000 pph to 70,000pph, ground shakes, jet makes funny noise and you immediately snap back to MIL. Everything stabilizes and your ground troop who happens to be an engine groupie tells you to do it again. Same thing … your in zone 5 stabilized for 30 seconds and boom … fuel flow runs away with noticeable engine performance. By then QA and flight safety, and even the DCM are pulling up in your area, so you scavenge and shut down. People start to say they thought the space shuttle was taking off.

The cool thing about F-111s is you did not have to tie them down for a hi-power run on the ramp

We (I should say engine groupies) changed AB fuel control and all was well. F-16 almost tells you what's wrong. completely different now compared to the 80-90's
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bealio
PostPosted: Feb 22, 2007 - 05:16 AM Reply with quote Back to top
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And you had to walk 15 miles to work and back up hill both ways in the snow!
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Mushmouth
PostPosted: Mar 30, 2007 - 04:54 AM Reply with quote Back to top
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Wow! Yeah, engines are just to smart theses days. If the aug fuel control ever takes a dump, the big brain just tells disable it. So no fun. The only way you get a mass amount of extra fuel flow is if a line broke. But it would be inside the engine like it should be!!!

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'00-'06 Shaw F16CJ/D GE-129
'06-'07 Kunsan F16C/D GE-100
'07-Pres Dyess B1B F101-GE102
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That_Engine_Guy
PostPosted: Mar 30, 2007 - 10:47 PM Reply with quote Back to top
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Unless one of the augmentor supply manifolds or pad seals are leaking OUTSIDE the duct...
Then again even if the fuel is leaking INTO the augmentor, you stand a very good chance of a burn-through. (AKA - Cracked spray manifold)

Neither situation is good. Shocked

Our "new" computer controlled engines still can't change parts or figure out ALL the problems. They only have very specific programing for very specific problems.

I'll see your computer Mush; and raise you a good Engine Troop. Cool

Nothing beats an old "Engine Troop" with about 15 years of motor learnin'
(Except maybe one with more motor learnin')

That Engine Guy
Nomenclature: Mechanic, Engine, Internal Combustion Gas-Turbine
Quantity: 1ea
PN: MOTOR-FIXER
NSN: 2840-WE-FIX-JETS
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Mushmouth
PostPosted: Mar 31, 2007 - 03:00 PM Reply with quote Back to top
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True. I hear ya on that note. The computers and the engine monitoring sofeware been around for a while and still full of glitches and problems. Doh

I'll see your engine troop; and raise you noobs. Cheers

Got plenty to hand out Thumb

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That_Engine_Guy
PostPosted: Apr 01, 2007 - 01:01 PM Reply with quote Back to top
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Cheers

Here's to the guys (and gals) who keep 'em flyin'
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