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Author
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Topic: Deciphering Apollo hardware inspection stamps
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Tim Collins
Member Posts: 45
From: Harrisburg, PA
Registered: Mar 2007
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posted 12-29-2009 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: 853
From: Danville, Ohio
Registered: Dec 2002
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posted 12-29-2009 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. |
Tim Collins
Member Posts: 45
From: Harrisburg, PA
Registered: Mar 2007
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posted 12-30-2009 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: 39
From: Clayfield, queensland, australia
Registered: Oct 2009
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posted 01-03-2010 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: 45
From: Harrisburg, PA
Registered: Mar 2007
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posted 01-05-2010 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: 4437
From: Sierra Vista, Arizona
Registered: Nov 1999
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posted 01-09-2010 08:42 AM
There are alternative abbreviations noted within KLAB's Apollo Acronyms Guide. |
SpaceAholic
Member Posts: 4437
From: Sierra Vista, Arizona
Registered: Nov 1999
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posted 01-10-2010 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: 45
From: Harrisburg, PA
Registered: Mar 2007
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posted 01-15-2010 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: 32
From: USA
Registered: Aug 2000
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posted 01-22-2010 07:58 AM
For whatever it's worth, I came across this document, Apollo Lunar Excursion Module - August 1962, while searching for some LM assembly/checkout documentation, specifically, the "Stamp Catalog" appendix (PDF pages 237-245).Editor's note: Document has been removed from NTRS due to export controls. |
SpaceAholic
Member Posts: 4437
From: Sierra Vista, Arizona
Registered: Nov 1999
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posted 01-22-2010 09:52 AM
Very useful reference... great find! |
hidaleeho
Member Posts: 57
From: Denver, Colorado, USA
Registered: Dec 2011
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posted 01-24-2017 12:13 PM
I was wondering if there is any reference guide for the circular and triangle shaped acceptance stamps you see on items used in the Apollo program? If not, any information you all might have would be appreciated.Editor's note: Threads merged. |
neo1022
Member Posts: 281
From: Santa Monica, CA
Registered: Jun 2013
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posted 01-24-2017 12:53 PM
If you want an overview of these stamps, check out pp. 39-40 in Jonathan Ward's Countdown to a Moon Launch. He shows the main acceptance/rejection stamps, an explains their meaning and use in the processing workflow. |
neo1022
Member Posts: 281
From: Santa Monica, CA
Registered: Jun 2013
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posted 01-25-2017 02:45 PM
quote:
Originally posted by Al Sep:
I came across this document...
Does anyone have a working link to the Apollo Lunar Excursion Module - August 1962? |
hidaleeho
Member Posts: 57
From: Denver, Colorado, USA
Registered: Dec 2011
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posted 01-27-2017 08:46 AM
Thanks! Very informative. The article had a lot of other great information as well.Do you know if QC would remove the stamps if at some point later the item was damaged, or if not, how that would be dealt with? |
Jim Behling
Member Posts: 1463
From: Cape Canaveral, FL
Registered: Mar 2010
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posted 01-27-2017 08:57 AM
There is no removing stamps. More paper would be written if the part was damaged and there would be stamps associated with that. |
hidaleeho
Member Posts: 57
From: Denver, Colorado, USA
Registered: Dec 2011
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posted 01-28-2017 11:01 AM
That's interesting, as I have an item that looks like the QC stamps have been removed. It has a tag that states received with id damage. All part number identification is intact, but QC stamps have been removed. |
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