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  #1  
Old 02-18-10, 02:08 PM
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hharney hharney is offline
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I keep wondering if they were just doing a low approach fly-by, like many of us do. If that was the intent, what went wrong? The right wing tip was not damaged from hitting the runway but appears to have just broke off at the extended fuel cell attach point. If the fuel cell broke off while performing a fly-by at high speed this could roll the aircraft clockwise very quickly. One would expect that it may look similar to the reports that witness's described. If this is the case why did the fuel cell separate? High speed? Structural? We may never know.


Interesting story relating to the crash:

http://www.examiner.com/x-35334-Newa...illfated-plane
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Old 02-18-10, 09:20 PM
jack374dn jack374dn is offline
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Quote:
Originally Posted by hharney View Post
I keep wondering if they were just doing a low approach fly-by, like many of us do. If that was the intent, what went wrong? The right wing tip was not damaged from hitting the runway but appears to have just broke off at the extended fuel cell attach point. If the fuel cell broke off while performing a fly-by at high speed this could roll the aircraft clockwise very quickly. One would expect that it may look similar to the reports that witness's described. If this is the case why did the fuel cell separate? High speed? Structural? We may never know.


Interesting story relating to the crash:

http://www.examiner.com/x-35334-Newa...illfated-plane

Did this aircraft have the extended wing mod. to increase gross take-off weight ?

Jack
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Old 02-18-10, 09:34 PM
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hharney hharney is offline
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I don't know which optional tanks it had. Given the winglets are Aviation Enterprises maybe the fuel cells are also. I know that some of the optional tip tanks do have a jetison system so that if you have to land before exhausting the fuel the fuel can be dumped so that the gross weight is legal for landing. The increased gross weight is for T/O and flight only and not landing.

Here is the info on the Flint extended tip tanks. It increases the Gross Wgt to 4,630 except where the GW is already 4,700 from Cessna. No dump system on the Flint Kit.

http://www.flintaero.com/337.htm
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Last edited by hharney : 02-19-10 at 12:42 PM. Reason: Added info on Flint
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Old 02-18-10, 09:53 PM
jack374dn jack374dn is offline
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Quote:
Originally Posted by hharney View Post
I don't know which optional tanks it had. Given the winglets are Aviation Enterprises maybe the fuel cells are also. I know that some of the optional tip tanks do have a jetison system so that if you have to land before exhausting the fuel the fuel can be dumped so that the gross weight is legal for landing. The increased gross weight is for T/O and flight only and not landing.

Thanks Herb ....

Jack
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Old 02-21-10, 08:54 PM
birddog birddog is offline
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Has there been a report released on the may 2008 skymaster that went down in Millville, Cumberland County, with Stephen Claussen on board?
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Last edited by birddog : 04-09-11 at 05:03 PM.
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Old 02-21-10, 09:29 PM
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Millville/Eagle Nest Accident

If I remember reading this incident it had something to do with fuel management. Here is the dialog findings about the fuel system.

The main tanks contained either trace amounts, or were completely devoid, of fuel. The right auxiliary tank contained approximately 11 gallons, and the left auxiliary tank contained approximately 2 gallons. The recovered fuel was clear and bright, with no visible contaminants. Tests with water-detection paste were negative, which indicated that no water was present in the fuel.

The fuel selector valve handle for the front engine was found in the "Left Aux" position, and the corresponding fuel selector valve was found set to the port from the left auxiliary tank. The fuel selector valve handle for the rear engine was found in the "Right Main" position, and the corresponding fuel selector valve was found set to an unused port, which was the "off" position.


Here's the full report

http://www.ntsb.gov/ntsb/brief2.asp?...08FA184&akey=1

Weight and Balance Report
http://www.ntsb.gov/Dockets/Aviation...184/424353.pdf
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Last edited by hharney : 02-21-10 at 09:58 PM.
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  #7  
Old 02-23-10, 01:59 AM
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Skymaster337B Skymaster337B is offline
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Wow, a fuel thing. Seems to be the cause of many 337 accidents. My rules: 1. Always top off the mains 2. Never fly more than 3 hours on the mains 3. Never switch the aux tanks at the same time, wait at least 5-10 minutes 4. Always feel for the indent 5. Grease the fuel valves during each annual 6. Burn main tanks for at least 2 hours before switching to the aux tanks (book says 1 hour, but why do just the minimum?)

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  #8  
Old 02-23-10, 03:19 PM
birddog birddog is offline
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Quote:
Originally Posted by hharney View Post
If I remember reading this incident it had something to do with fuel management. Here is the dialog findings about the fuel system.

The main tanks contained either trace amounts, or were completely devoid, of fuel. The right auxiliary tank contained approximately 11 gallons, and the left auxiliary tank contained approximately 2 gallons. The recovered fuel was clear and bright, with no visible contaminants. Tests with water-detection paste were negative, which indicated that no water was present in the fuel.

The fuel selector valve handle for the front engine was found in the "Left Aux" position, and the corresponding fuel selector valve was found set to the port from the left auxiliary tank. The fuel selector valve handle for the rear engine was found in the "Right Main" position, and the corresponding fuel selector valve was found set to an unused port, which was the "off" position.


Here's the full report

http://www.ntsb.gov/ntsb/brief2.asp?...08FA184&akey=1

Weight and Balance Report
http://www.ntsb.gov/Dockets/Aviation...184/424353.pdf
Thanks for the information. This came up cross referencing the reports on N12NA. I did not recall the history on that accident so thanks for the details. It's a valuable reminder on fuel management!
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Last edited by birddog : 04-09-11 at 05:03 PM.
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