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Author
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Topic: Deciphering hardware inspection stamps
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Tim Collins
Member Posts: 26
From: Harrisburg, PA
Registered: Mar 2007
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posted December 29, 2009 12:28 AM
   
On a piece of Command Module telecommunications hardware I have (manufactured by Radiation, Inc for North American) there are a variety of inspection stamps. A number of these stampings include the characters MR, DR, and/or CR. For example, MR DR A132699-1, MR/DR S 005087-1, and CR INSP 55674.Anyone have any insights into what these characters may stand for or signify? |
space1
Member Posts: 401
From: Danville, Ohio, USA
Registered: Dec 2002
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posted December 29, 2009 07:44 AM
I don't have a definitive answer, only guesses. The MR and DR numbers may indicate the engineering changes incorporated into the item. INSP would indicate inspection or inspector. Not much, but I hope that helps.------------------
John Fongheiser
President
Historic Space Systems, http://www.space1.com |
Tim Collins
Member Posts: 26
From: Harrisburg, PA
Registered: Mar 2007
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posted December 30, 2009 10:23 AM
Thanks John - appreciate your thoughts. Maybe then the R in MR and DR possibly stood for "Revision" (for different revision levels). I'll keep digging. Tim |
nasa_pete
Member Posts: 31
From: springfield lakes, queensland, australia
Registered: Oct 2009
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posted January 03, 2010 11:04 PM
I am pretty sure the MR DR is Material Review Disposition Record, they are to do with the inspections carried out on the parts, the CR I am not entirely sure of though. |
Tim Collins
Member Posts: 26
From: Harrisburg, PA
Registered: Mar 2007
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posted January 05, 2010 10:03 AM
Thanks Pete - You're correct. Based on your comments, I did some further searching and found listings of NASA abbreviations, and this one was included. Now I just need to find some references to my specific MRDR numbers (probably not very likely, but I'll do some digging). Thanks again. Tim |
SpaceAholic
Member Posts: 2551
From: Sierra Vista, Arizona
Registered: Nov 1999
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posted January 09, 2010 08:42 AM
There are alternative abbreviations noted within KLAB's Apollo Acronyms Guide.------------------
Scott Schneeweis, LCDR, USN;
SPACEAHOLIC.com |
SpaceAholic
Member Posts: 2551
From: Sierra Vista, Arizona
Registered: Nov 1999
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posted January 10, 2010 11:08 PM
Here's another clue..this shot from CM101 (Apollo 7) showing lower equipment bay, RJ/EC assembly to the right, Gyro Display Coupler to the left, with the empty slot apportioned for the Electronic Display Assembly which has been removed to facilitate repair of the cold plate. Reviewing the NASA Acryonm list coupled with the photo evidence inclined to believe MR/DR equates to Malfunction Report/Discrepancy Record, with CR as Change Recommendation.  |
Tim Collins
Member Posts: 26
From: Harrisburg, PA
Registered: Mar 2007
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posted January 15, 2010 08:33 PM
You make a good case Scott. One thing that keeps me wondering a bit though is that I seem to see the MR/DR designation on numerous assemblies. Perhaps they were all items that had "an issue" of some sort. Thanks for this insight. Tim |
Al Sep
Member Posts: 31
From: USA
Registered: Aug 2000
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posted January 22, 2010 07:58 AM
For whatever it's worth, I came across this document while searching for some LM assembly/checkout documentation, specifically, the "Stamp Catalog" appendix (Adobe pages 237 - 245). Gotta love the NTRS website! |
SpaceAholic
Member Posts: 2551
From: Sierra Vista, Arizona
Registered: Nov 1999
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posted January 22, 2010 09:52 AM
Very useful reference... great find! |
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