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Old 05-04-2013, 09:37 AM
  #21  
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Originally Posted by navigatro View Post
Good thing the AF removed parachutes from the KC-135 to save money.

Whoever made O-6 with that brilliant idea can rot in hell.
Probably wouldn't have mattered. If the aircraft broke up in flight, there likely would not have been any way for the crew to even get to the chutes, much less put them on and bail out.
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Old 05-04-2013, 10:06 AM
  #22  
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I believe the C-5 formerly carried parachutes for the crew. Then someone decided that if a government airplane is carrying ANY passengers besides the crew, then ALL must experience the same fate as the airframe. He didn't want guys bailing out of a bad jet, leaving the passengers behind.
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Old 05-04-2013, 11:22 AM
  #23  
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Originally Posted by hindsight2020 View Post
Are you suggesting an electrical fuel pump kaboom, a 'la old KC-135/B-52s/TWA 800? If it is indeed that which brought it down, it's kinda criminal on the USAF's part to be having crew losses with that many decades of hindsight behind that particular failure mode....
Prior to the 1990's, a KC-135 would go "kaboom" about every 5 years related to the hydraulically-driven A/R pumps in the Fwd and Aft Body tanks. After a TCTO (supposedly) fixed the problem, there hasn't (perhaps hadn't) been a body tank explosion since. Interested in the findings.

Every ex-135 driver including myself probably thought the same thing (Body tank) when we heard about this accident.
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Old 05-04-2013, 11:24 AM
  #24  
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Yes, absolutely tragic. What's the capacity of the body tank in the -135, blastoff?
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Old 05-04-2013, 11:34 AM
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Originally Posted by cactipilot View Post
Yes, absolutely tragic. What's the capacity of the body tank in the -135, blastoff?
The Fwd and Aft body each have about 40K (80K total) lbs capacity and the Center Wing has about 48K capacity. 3 different tanks.

The rest of the gas is in 4 main and 2 reserve tanks in the wings, and the "Upper Deck" tank in the tail for total capacity of 209K.
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Old 05-04-2013, 11:37 AM
  #26  
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(edited...too slow)

I blame Darleen Druyun, the broken Air Force aquisitions process, and Congress (for funding never-ending OIF/OEF missions)...

The tanker has been supremely reliable for the past two decades, which is why this catastrophic loss is so shocking, especially for those of us who have flown 1963 models (and older).
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Old 05-04-2013, 11:57 AM
  #27  
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Originally Posted by UAL T38 Phlyer View Post
It appears to me there are scorch marks inside the wing box on the wing that separated....

God's rest, gentlemen.
The A/R pumps were changed out a few years ago to a ceramic version which would theoretically not overheat if inadvertently run dry... Unlikely any pumps were run dry in this scenario since they just departed and should have been loaded to the gills for all the thirsty receivers they were headed towards. IMO likely it was a center wing override pump that did it or a fuel qty sys malfunction where electricity and fuel came together with the expected result.
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Old 05-04-2013, 11:59 AM
  #28  
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Originally Posted by rmr1992 View Post
The A/R pumps were changed out a few years ago to a ceramic version which would theoretically not overheat if inadvertently run dry... Unlikely any pumps were run dry in this scenario since they just departed and should have been loaded to the gills for all the thirsty receivers they were headed towards. IMO likely it was a center wing override pump that did it or a fuel qty sys malfunction where electricity and fuel came together with the expected result.
Leaning the same way since the A/R pumps should have been immersed at this phase of flight anyways.
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Old 05-04-2013, 12:42 PM
  #29  
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Does the KC-135 have fuel apsi-scrubbers or Nitrogen ullage inerting, like on the C-5? According to theory, you could throw a lit match into a C-5 fuel tank, and it would not explode.
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Old 05-04-2013, 01:39 PM
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I don't think so... I fly a different version of the -135 now and it has been a few years since I last flew the KC... But I doubt they have that. I know my platform does not, at least, if we do, it is no where in my tech data.
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