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Douglas DC4 bathtub fitting corrosion

Douglas DC4 bathtub fitting corrosion

Douglas DC4 bathtub fitting corrosion

(OP)
Anyone got info on the allowed depth of corrosion removal in the actual bathtub basin [Douglas DC 4] where the nuts/bolts sit[this holds the wing tip with the main fuel tank] Cheers

RE: Douglas DC4 bathtub fitting corrosion

zenith601xl ...

1.  The DC-4 airframe maintenance manual will be Your best bet. There are companies selling old AMMs.

2.  Try contacting Boeing commercial tech support... and ask if they provide any Douglas-heritage engineering expertise for early [prop] DC-3-to-DC-7 acft. IF Boeing/DAC has no expertise on this antique, then they may know who to contact; IE:  other mod/repair companies or organizations with engineering support.

3.  Check for any FAA ACs, ADs, SBs or SLs on this particular issue.

NOTE.
FAA AC 20-52 "Maintenance Inspection Notes for Douglas DC 6/7 Series Aircraft" comes close... as an example [There may be similar data for the DC-4].

4.  The following associations may also be able to help.

"The Douglas DC-4 Association of South Africa" http://www.dc-4.co.za/

"Dutch Dakota Association" [now DDA Classic airlines]http://www.ruudleeuw.com/dda.htm
http://en.wikipedia.org/wiki/Dutch_Dakota_Association


 

Regards, Wil Taylor

Trust - But Verify!

We believe to be true what we prefer to be true.

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RE: Douglas DC4 bathtub fitting corrosion

Was the DC-4 included in those SIRM's that the FAA mandated a few decades ago?

Steven Fahey, CET

RE: Douglas DC4 bathtub fitting corrosion

Thruthefence... interesting find!

Hope it relates to airframe repair: might just relate to inspection and general C-54 aircraft maintenance... but at least its a step in the right direction.

I would assume that the associations [noted] would have just about every maintenance and repair document they could get-hold-of on the DC-4/C-54 acft.   

Regards, Wil Taylor

Trust - But Verify!

We believe to be true what we prefer to be true.

For those who believe, no proof is required; for those who cannot believe, no proof is possible.

RE: Douglas DC4 bathtub fitting corrosion

(OP)
We do already have the Structures,Parts and Maintenance manuals for the DC-4 but the info  is only generalised when it comes to the corrosion repair of the bathtub fitting.Just wanted to know more about the stresses within/thru the actual bathtub portion of the angle fitting so as to have a better understanding in evaluating the serviceability of the fitting.The fitting I was referring to is one on the top inside the fuel tank. Cheers  

RE: Douglas DC4 bathtub fitting corrosion

(OP)
Thank you for your replies.Will proceed with trying to get a hold of page C4-7. Cheers   

RE: Douglas DC4 bathtub fitting corrosion

I scanned that design manual a bit, found some great stuff.
Thanks!
An interesting feature before they dive into the technical stuff is Chapter A, general design procedures - go to A.4 for example.  How many times have we tried to explain that to a new guy?   ...or a not-so-new guy?  Or ourselves skipped such steps when, on hindsight, they could have helped avoid a problem.
 

Steven Fahey, CET

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