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TZTriStar500
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DC10 Horizontal Stab Skin Planks FAA AD

Thu Dec 13, 2007 11:07 pm

We are a rather new DC10 operator and wanted to ask any FedEx employees or other DC10 operator personnel on this forum what their experience has been with this area.

For those not familiar, the DC10 is subject to FAA AD 88-03-08 which mandates periodic ultrasonic inspections of the horizontal stabilizer integrally stiffened skin panel planks at the operating bulkhead attachments for stress corrosion cracks. If cracks are found and within flyable limits, they must be reinspected every 3 months. The terminating action is replacement of the skin panel which is a several thousand man-hour job.

My main questions of interest are:

* How many have experienced replacing one or more of these panels?
* Have any of your aircraft been grounded during a periodic inspection because the extent of existing and newly found cracks fell outside of flyable limits?

My desire is to judge our risk exposure to this to determine if we should pro-actively replace skin panels.

Thank you in advance if anyone has any input.
35 years of American Trans Air/ATA Airlines, 1973-2008. A great little airline that will not be soon forgotten.
 
tdscanuck
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Joined: Wed Jan 11, 2006 7:25 am

RE: DC10 Horizontal Stab Skin Planks FAA AD

Fri Dec 14, 2007 5:05 am



Quoting TZTriStar500 (Thread starter):
My main questions of interest are:

* How many have experienced replacing one or more of these panels?
* Have any of your aircraft been grounded during a periodic inspection because the extent of existing and newly found cracks fell outside of flyable limits?

My desire is to judge our risk exposure to this to determine if we should pro-actively replace skin panels.

Although I'm sure there will be good anecdotal information on this, if you're using it to judge maintenance plans you really should ask Douglas (i.e. Boeing). This type of question is pretty routine for them and they should be able to give you an answer. If you're doing your own DC-10 maintenance, you've probably got a support contract with Boeing already.

Tom.
 
avioniker
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RE: DC10 Horizontal Stab Skin Planks FAA AD

Fri Dec 14, 2007 5:11 am

You just bought one of the oldest 10 operators. Call Peachtree. I'm sure you'll get some answers from down there. Especially considering the type of flying and maintenance they've done over the last 20 or so years on their fleet.

 Smile
One may educate the ignorance from the unknowing but stupid is forever. Boswell; ca: 1533
 
dispatcher
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RE: DC10 Horizontal Stab Skin Planks FAA AD

Fri Dec 14, 2007 6:47 am

Well here's my anecdotal evidence from the dispatch / ops control side.. I've have never heard of this problem downing or delaying any of our jets in or out of heavy maintenance, and since you say it is a several thousand man hour job I think I would have noticed something.. maybe not though. It could be that it is being done in the MD-10 conversion or has been done in the pax - freighter mod. My $0.02.
 
boeing767mech
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RE: DC10 Horizontal Stab Skin Planks FAA AD

Fri Dec 14, 2007 12:27 pm

We used to have to do this inspection on our DC-10's during B-checks. I hated climbing up in the greasy hole to pull the spar access panels so the NDT guys could get in to do there inspections. (hoping we are talking about the same AD). I don't remember heard about any aircraft being removed from service for repair, If they where is was ususally done in Tulsa during a MBV.

David
Never under-estimate the predictably of stupidty

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