-----------------------------------------------------------------------
  MSFC Problem Reporting and Corrective Action (PRACA) System

  WHOLE RECORD REPORT( + ADDENDUM)
  -----------------------------------------------------------------------

+-------------+---------------+-----------+----------+------+--------+
| **MSFC      | **In-Flight   | **C       | *        | *    |        |
| Record      | Anomaly       | ontractor | *JSC#**\ | *KSC |        |
| \#**\       | Number**\     | Report    | \--      | #**\ |        |
| A09681      | \--           | Number**\ |          | \--  |        |
|             |               | T-052     |          |      |        |
+-------------+---------------+-----------+----------+------+--------+
| **Problem   |               |           |          |      |        |
| Title**\    |               |           |          |      |        |
| NUMEROUS    |               |           |          |      |        |
| PIN HOLES   |               |           |          |      |        |
| IN PRIMER   |               |           |          |      |        |
| OVER ENTIRE |               |           |          |      |        |
| SURFACE OF  |               |           |          |      |        |
| TANK        |               |           |          |      |        |
+-------------+---------------+-----------+----------+------+--------+
| **EICN#**\  | **ELEMENT**\  | **Cont    | **       | **   |        |
| \--         | ET            | ractor**\ | FSCM#**\ | FCRI |        |
|             |               | MMMSS     | \--      | T**\ |        |
|             |               |           |          | 3    |        |
+-------------+---------------+-----------+----------+------+--------+
| **HCRIT**\  | **Sys_Lvl**\  | **Misc    |          |      |        |
| \--         | N             | Codes**\  |          |      |        |
|             |               | A **(1)** |          |      |        |
|             |               | B C D E F |          |      |        |
|             |               | G H I J K |          |      |        |
|             |               | L M N O   |          |      |        |
+-------------+---------------+-----------+----------+------+--------+
| **          | **NO          | *         | **SER    | *    |        |
| HARDWARE**\ | MENCLATURE**\ | *PART#**\ | /LOT#**\ | *MAN |        |
| EIM         | EXTERNAL TANK | 82        | LWT-34   | UFAC |        |
|             |               | 601000000 |          | TURE |        |
|             |               |           |          | R**\ |        |
|             |               |           |          | MMC  |        |
+-------------+---------------+-----------+----------+------+--------+
| **          | **NO          | *         | **SER    | *    |        |
| HARDWARE**\ | MENCLATURE**\ | *PART#**\ | /LOT#**\ | *MAN |        |
| LRU         | N/A           | N/A       | N/A      | UFAC |        |
|             |               |           |          | TURE |        |
|             |               |           |          | R**\ |        |
|             |               |           |          | N/A  |        |
+-------------+---------------+-----------+----------+------+--------+
| **          | **NO          | *         | **SER    | *    |        |
| HARDWARE**\ | MENCLATURE**\ | *PART#**\ | /LOT#**\ | *MAN |        |
| NCA         | EPOXY PRIMER  | MMS-K-719 | 17-0218  | UFAC |        |
|             |               |           |          | TURE |        |
|             |               |           |          | R**\ |        |
|             |               |           |          | DE   |        |
|             |               |           |          | SOTO |        |
+-------------+---------------+-----------+----------+------+--------+
| **Test/O    | **Prevailing  | **F /     | **Fail   | **   |        |
| peration**\ | Condtion**\   | U**\      | Mode**\  | Caus |        |
| M - MFG     | N -           | F         | MSI -    | e**\ |        |
|             | INSPECTION    |           | IN       | MP - |        |
|             |               |           | SULATION | MFG  |        |
|             |               |           |          | -PRC |        |
+-------------+---------------+-----------+----------+------+--------+
| **System**\ | **Defect**\   | **Ma      | **Work   | **   |        |
| TPS         | DD - DETACH   | terial**\ | Co       | Fail |        |
|             |               | F - INSUL | ntact**\ | Dat  |        |
|             |               |           | F.       | e**\ |        |
|             |               |           | RAMSEY   | 10   |        |
|             |               |           |          | /28/ |        |
|             |               |           |          | 1985 |        |
+-------------+---------------+-----------+----------+------+--------+
| **Received  | **Date        | **FMEA    | **IFA:   | *    |        |
| at MSFC**\  | Isolated**\   | Ref       | Mission  | *Mis |        |
| 11/19/1985  | \--           | erence**\ | Phase**\ | sion |        |
|             |               | 1.2.1     | \--      | Ela  |        |
|             |               |           |          | psed |        |
|             |               |           |          | Tim  |        |
|             |               |           |          | e**\ |        |
|             |               |           |          | \--  |        |
+-------------+---------------+-----------+----------+------+--------+
| **          |               | **S       |          | **   |        |
| Location**\ |               | ymptom**\ |          | Time |        |
| MAF         |               | UC -      |          | Cycl |        |
|             |               | UNSAT     |          | e**\ |        |
|             |               |           |          | \--  |        |
+-------------+---------------+-----------+----------+------+--------+
| **          |               |           |          |      |        |
| Effectivity |               |           |          |      |        |
| Text**\     |               |           |          |      |        |
| LWT-35 AND  |               |           |          |      |        |
| SUBS        |               |           |          |      |        |
+-------------+---------------+-----------+----------+------+--------+
| **Vehicle   |               |           |          |      |        |
| Effectivity |               |           |          |      |        |
| Codes**     |               |           |          |      |        |
+-------------+---------------+-----------+----------+------+--------+
| **Vehicle   | **Vehicle     | **Vehicle | *        | *    |        |
| 1**\        | 2**\          | 3**\      | *Vehicle | *Veh |        |
| \--         | \--           | \--       | 4**\     | icle |        |
|             |               |           | \--      | 5**\ |        |
|             |               |           |          | \--  |        |
+-------------+---------------+-----------+----------+------+--------+
| **Mission   |               |           |          |      |        |
| Effectivity |               |           |          |      |        |
| Codes**     |               |           |          |      |        |
+-------------+---------------+-----------+----------+------+--------+
| **Mssn 1**\ | **Mssn 2**\   | **Mssn    | **Mssn   | **   |        |
| \--         | \--           | 3**\      | 4**\     | Mssn |        |
|             |               | \--       | \--      | 5**\ |        |
|             |               |           |          | \--  |        |
+-------------+---------------+-----------+----------+------+--------+
| **Estimated |               |           |          |      |        |
| Completion  |               |           |          |      |        |
| Dates**     |               |           |          |      |        |
+-------------+---------------+-----------+----------+------+--------+
| **MSFC      | **Contractor  | **LVL 3   | **Remark |      |        |
| Approved    | Req Defer     | Close**\  | /        |      |        |
| Defer Until | Until Date**\ | \--       | A        |      |        |
| Date**\     | \--           |           | ction**\ |      |        |
| \--         |               |           | \--      |      |        |
+-------------+---------------+-----------+----------+------+--------+
| **In        |               |           |          |      |        |
| vestigation |               |           |          |      |        |
| /           |               |           |          |      |        |
| Resolution  |               |           |          |      |        |
| Summary**   |               |           |          |      |        |
+-------------+---------------+-----------+----------+------+--------+
| **Last MSFC | **CN RSLV     | **Defer   | **Add    | *    |        |
| Update**\   | SBMT**\       | Date**\   | Date**\  | *R/C |        |
| 01/03/1992  | 07/01/1986    | \--       | \--      | Code |        |
|             |               |           |          | s**\ |        |
|             |               |           |          | 2 -  |        |
|             |               |           |          | MFG  |        |
|             |               |           |          | \--  |        |
|             |               |           |          | \--  |        |
+-------------+---------------+-----------+----------+------+--------+
| *           |               |           |          |      |        |
| *Assignee** |               |           |          |      |        |
+-------------+---------------+-----------+----------+------+--------+
| **Design**\ | **Chief       | **S &     | **Pr     | *    |        |
| B. DAVIS    | Engineer**\   | MA**\     | oject**\ | *Pro |        |
|             | \--           | R.        | J.       | ject |        |
|             |               | JACKSON   | C        | MG   |        |
|             |               |           | AVALARIS | R**\ |        |
|             |               |           |          | \--  |        |
+-------------+---------------+-----------+----------+------+--------+
| *           |               |           |          |      |        |
| *Approval** |               |           |          |      |        |
+-------------+---------------+-----------+----------+------+--------+
| **Design**\ | **Chief       | **S &     | **Pr     | *    |        |
| B. DAVIS    | Engineer**\   | MA**\     | oject**\ | *Pro |        |
|             | \--           | R.        | J.       | ject |        |
|             |               | JACKSON   | C        | MG   |        |
|             |               |           | AVALARIS | R**\ |        |
|             |               |           |          | \--  |        |
+-------------+---------------+-----------+----------+------+--------+
| **PAC       | **PAC Review  | **MSFC    | **S      | *    |        |
| Assignee**\ | Complete**\   | Closure   | tatus**\ | *F/A |        |
| G. MILLER   | GM            | Date**\   | C -      | C    |        |
|             |               | 0         | CLOSED   | ompl |        |
|             |               | 8/08/1986 |          | etio |        |
|             |               |           |          | n**\ |        |
|             |               |           |          | \--  |        |
+-------------+---------------+-----------+----------+------+--------+
| **Problem   | **SEV**\      | **Program | *        | **O  |        |
| Type**\     | \--           | Name**\   | *REVL**\ | PRIN |        |
| \--         |               | \--       | \--      | C**\ |        |
|             |               |           |          | \--  |        |
+-------------+---------------+-----------+----------+------+--------+
| **FUNC      | **Software    | *         |          | **SU | **So   |
| MOD**\      | E             | *Software |          | BTYP | ftware |
| \--         | ffectivity**\ | Fail      |          | E**\ | C      |
|             | \-- \-- \--   | CD**\     |          | \--  | losure |
|             | \-- \--       | \--       |          |      | CD**\  |
|             |               |           |          |      | \--    |
+-------------+---------------+-----------+----------+------+--------+
| **RES       | **Approval    |           |          |      |        |
| PERSON      | Signature     |           |          |      |        |
| L2**\       | L3**\         |           |          |      |        |
| \--         | \--           |           |          |      |        |
+-------------+---------------+-----------+----------+------+--------+
| **Related   | **Related     |           |          |      |        |
| Document    | Document      |           |          |      |        |
| Type**\     | ID**\         |           |          |      |        |
| \--         | \--           |           |          |      |        |
+-------------+---------------+-----------+----------+------+--------+
| **Related   |               |           |          |      |        |
| Document    |               |           |          |      |        |
| Title**\    |               |           |          |      |        |
| \--         |               |           |          |      |        |
+-------------+---------------+-----------+----------+------+--------+
| **Related   | **Related     |           |          |      |        |
| Document    | Document      |           |          |      |        |
| Type**\     | ID**\         |           |          |      |        |
| \--         | \--           |           |          |      |        |
+-------------+---------------+-----------+----------+------+--------+
| **Related   |               |           |          |      |        |
| Document    |               |           |          |      |        |
| Title**\    |               |           |          |      |        |
| \--         |               |           |          |      |        |
+-------------+---------------+-----------+----------+------+--------+
| **Related   | **Related     |           |          |      |        |
| Document    | Document      |           |          |      |        |
| Type**\     | ID**\         |           |          |      |        |
| \--         | \--           |           |          |      |        |
+-------------+---------------+-----------+----------+------+--------+
| **Related   |               |           |          |      |        |
| Document    |               |           |          |      |        |
| Title**\    |               |           |          |      |        |
| \--         |               |           |          |      |        |
+-------------+---------------+-----------+----------+------+--------+
| *           |               |           |          |      |        |
| *Contractor |               |           |          |      |        |
| Status      |               |           |          |      |        |
| Summary**   |               |           |          |      |        |
+-------------+---------------+-----------+----------+------+--------+
| **Reliabil  |               |           |          |      |        |
| ity/Quality |               |           |          |      |        |
| Assurance   |               |           |          |      |        |
| Concerns,   |               |           |          |      |        |
| Recomme     |               |           |          |      |        |
| ndations:** |               |           |          |      |        |
+-------------+---------------+-----------+----------+------+--------+
| **Problem   |               |           |          |      |        |
| De          |               |           |          |      |        |
| scription** |               |           |          |      |        |
|             |               |           |          |      |        |
| REF: MARS   |               |           |          |      |        |
| T-83805     |               |           |          |      |        |
| PRIMER      |               |           |          |      |        |
| APPLIED TO  |               |           |          |      |        |
| LH2 TANK OF |               |           |          |      |        |
| LWT-34      |               |           |          |      |        |
| EXHIBITED A |               |           |          |      |        |
|             |               |           |          |      |        |
| NUMEROUS    |               |           |          |      |        |
| AMOUNT OF   |               |           |          |      |        |
| PIN HOLES   |               |           |          |      |        |
| OVER THE    |               |           |          |      |        |
| ENTIRE      |               |           |          |      |        |
| SURFACE OF  |               |           |          |      |        |
| THE TANK.   |               |           |          |      |        |
| THE         |               |           |          |      |        |
|             |               |           |          |      |        |
| PRIMER      |               |           |          |      |        |
| MA          |               |           |          |      |        |
| NUFACTURING |               |           |          |      |        |
| LOT NUMBERS |               |           |          |      |        |
| ARE 17-0218 |               |           |          |      |        |
| (BASE) AND  |               |           |          |      |        |
| 17-0219     |               |           |          |      |        |
| (CURING     |               |           |          |      |        |
|             |               |           |          |      |        |
| AGENT)      |               |           |          |      |        |
+-------------+---------------+-----------+----------+------+--------+
| *           |               |           |          |      |        |
| *Contractor |               |           |          |      |        |
| Inve        |               |           |          |      |        |
| stigation/R |               |           |          |      |        |
| esolution** |               |           |          |      |        |
|             |               |           |          |      |        |
| R/A - BARE  |               |           |          |      |        |
| METAL IS    |               |           |          |      |        |
| TOUCHEDUP   |               |           |          |      |        |
| AS A        |               |           |          |      |        |
| STANDARD    |               |           |          |      |        |
| REPAIR.     |               |           |          |      |        |
| 11/19/85    |               |           |          |      |        |
| GENERAL -   |               |           |          |      |        |
|             |               |           |          |      |        |
| THE PIN     |               |           |          |      |        |
| HOLES IN    |               |           |          |      |        |
| THE EPOXY   |               |           |          |      |        |
| PRIMER WAS  |               |           |          |      |        |
| FIRST       |               |           |          |      |        |
| REPORTED ON |               |           |          |      |        |
| LH2 TANK,   |               |           |          |      |        |
|             |               |           |          |      |        |
| LWT-34, IN  |               |           |          |      |        |
| CELL \"P.\" |               |           |          |      |        |
| THE SAME    |               |           |          |      |        |
| PROBLEM (TO |               |           |          |      |        |
| A LESSER    |               |           |          |      |        |
| EXTENT) WAS |               |           |          |      |        |
| THEN        |               |           |          |      |        |
|             |               |           |          |      |        |
| OBSERVED ON |               |           |          |      |        |
| LO2 AND     |               |           |          |      |        |
| LH2,        |               |           |          |      |        |
| LWT-33. IT  |               |           |          |      |        |
| WAS FURTHER |               |           |          |      |        |
| NOTED THAT  |               |           |          |      |        |
| A SIMILAR   |               |           |          |      |        |
|             |               |           |          |      |        |
| PROBLEM HAD |               |           |          |      |        |
| OCCURRED ON |               |           |          |      |        |
| AN LO2      |               |           |          |      |        |
| FEEDLINE    |               |           |          |      |        |
| WHICH WAS   |               |           |          |      |        |
| PRIMED IN   |               |           |          |      |        |
| THE         |               |           |          |      |        |
|             |               |           |          |      |        |
| COMMODITIES |               |           |          |      |        |
| SHOP,       |               |           |          |      |        |
| BUILDING    |               |           |          |      |        |
| 103. ALL OF |               |           |          |      |        |
| THE ABOVE   |               |           |          |      |        |
| OCCURRENCES |               |           |          |      |        |
| WERE        |               |           |          |      |        |
|             |               |           |          |      |        |
| RELATED TO  |               |           |          |      |        |
| THE EPOXY   |               |           |          |      |        |
| PRIMER      |               |           |          |      |        |
| MA          |               |           |          |      |        |
| NUFACTURING |               |           |          |      |        |
| LOT NUMBERS |               |           |          |      |        |
| 17-0218     |               |           |          |      |        |
| (BASE)      |               |           |          |      |        |
|             |               |           |          |      |        |
| AND 17-0219 |               |           |          |      |        |
| (CURING     |               |           |          |      |        |
| AGENT). A   |               |           |          |      |        |
| TEST OF THE |               |           |          |      |        |
| RETAINED    |               |           |          |      |        |
| SAMPLE AT   |               |           |          |      |        |
| DESOTO DID  |               |           |          |      |        |
|             |               |           |          |      |        |
| NOT REVEAL  |               |           |          |      |        |
| THE SAME    |               |           |          |      |        |
| CHAR        |               |           |          |      |        |
| ACTERISTICS |               |           |          |      |        |
| (PIN        |               |           |          |      |        |
| HOLES).     |               |           |          |      |        |
| HOWEVER,    |               |           |          |      |        |
| P           |               |           |          |      |        |
| ARTICULATES |               |           |          |      |        |
|             |               |           |          |      |        |
| IN EXCESS   |               |           |          |      |        |
| OF 25       |               |           |          |      |        |
| MICRONS     |               |           |          |      |        |
| WERE        |               |           |          |      |        |
| NOTICED BY  |               |           |          |      |        |
| DESOTO;     |               |           |          |      |        |
| REQUIREMENT |               |           |          |      |        |
| IS 12       |               |           |          |      |        |
|             |               |           |          |      |        |
| MICRONS     |               |           |          |      |        |
| MAXIMUM.    |               |           |          |      |        |
| UPON        |               |           |          |      |        |
| N           |               |           |          |      |        |
| OTIFICATION |               |           |          |      |        |
| BY DESOTO,  |               |           |          |      |        |
| MMC         |               |           |          |      |        |
| SUSPENDED   |               |           |          |      |        |
| THE USE OF  |               |           |          |      |        |
|             |               |           |          |      |        |
| THIS LOT OF |               |           |          |      |        |
| MATERIAL AT |               |           |          |      |        |
| ALL         |               |           |          |      |        |
| LOCATIONS,  |               |           |          |      |        |
| INCLUDING   |               |           |          |      |        |
| THE         |               |           |          |      |        |
| SU          |               |           |          |      |        |
| BCONTRACTOR |               |           |          |      |        |
|             |               |           |          |      |        |
| LEVEL. A    |               |           |          |      |        |
| STUDY OF    |               |           |          |      |        |
| USAGE OF    |               |           |          |      |        |
| THE         |               |           |          |      |        |
| MATERIAL    |               |           |          |      |        |
| SHOWED THAT |               |           |          |      |        |
| AT TANK     |               |           |          |      |        |
| LEVEL       |               |           |          |      |        |
|             |               |           |          |      |        |
| A           |               |           |          |      |        |
| PPLICATION, |               |           |          |      |        |
| LO2 AND LH2 |               |           |          |      |        |
| TANK,       |               |           |          |      |        |
| LWT\'S 29   |               |           |          |      |        |
| AND UP,     |               |           |          |      |        |
| WERE        |               |           |          |      |        |
| AFFECTED    |               |           |          |      |        |
| AND AT      |               |           |          |      |        |
|             |               |           |          |      |        |
| THE         |               |           |          |      |        |
| COMPONENT   |               |           |          |      |        |
| LEVEL,      |               |           |          |      |        |
| LWT\'S 28   |               |           |          |      |        |
| AND UP WERE |               |           |          |      |        |
| AFFECTED.   |               |           |          |      |        |
| IN          |               |           |          |      |        |
| VESTIGATION |               |           |          |      |        |
| -           |               |           |          |      |        |
|             |               |           |          |      |        |
| THIS CAPS   |               |           |          |      |        |
| WILL        |               |           |          |      |        |
| DETERMINE   |               |           |          |      |        |
| THE CAUSE   |               |           |          |      |        |
| AND/OR      |               |           |          |      |        |
| R           |               |           |          |      |        |
| ELATIONSHIP |               |           |          |      |        |
| BETWEEN THE |               |           |          |      |        |
| PIN         |               |           |          |      |        |
|             |               |           |          |      |        |
| HOLES FOUND |               |           |          |      |        |
| AT MICHOUD  |               |           |          |      |        |
| AND THE     |               |           |          |      |        |
| P           |               |           |          |      |        |
| ARTICULATES |               |           |          |      |        |
| NOTED AT    |               |           |          |      |        |
| DESOTO AND  |               |           |          |      |        |
|             |               |           |          |      |        |
| S           |               |           |          |      |        |
| UBSEQUENTLY |               |           |          |      |        |
| AT MAF.     |               |           |          |      |        |
| VARIOUS     |               |           |          |      |        |
| TASKS HAVE  |               |           |          |      |        |
| BEEN        |               |           |          |      |        |
| ASSIGNED TO |               |           |          |      |        |
| INVESTIGATE |               |           |          |      |        |
|             |               |           |          |      |        |
| SPECIFIC    |               |           |          |      |        |
| AREAS AS    |               |           |          |      |        |
| FOLLOWS:    |               |           |          |      |        |
| TASK I THE  |               |           |          |      |        |
| QUALITY     |               |           |          |      |        |
| ENGINEERING |               |           |          |      |        |
| LABS TO     |               |           |          |      |        |
| TEST        |               |           |          |      |        |
|             |               |           |          |      |        |
| LOTS 0218   |               |           |          |      |        |
| AND 0219    |               |           |          |      |        |
| AND         |               |           |          |      |        |
| IDENTIFY    |               |           |          |      |        |
| ANY CHANGES |               |           |          |      |        |
| OR UNUSUAL  |               |           |          |      |        |
| CHAR        |               |           |          |      |        |
| ACTERISTICS |               |           |          |      |        |
|             |               |           |          |      |        |
| IN THE      |               |           |          |      |        |
| BASE, CURE, |               |           |          |      |        |
| AND SOLVENT |               |           |          |      |        |
| C           |               |           |          |      |        |
| OMPONENTS.. |               |           |          |      |        |
| TASK II     |               |           |          |      |        |
| MARTIN      |               |           |          |      |        |
| MARIETTA    |               |           |          |      |        |
|             |               |           |          |      |        |
| LABS        |               |           |          |      |        |
| (BALTIMORE) |               |           |          |      |        |
| TO ANALYZE  |               |           |          |      |        |
| LOTS 0218   |               |           |          |      |        |
| AND 0219    |               |           |          |      |        |
| USING       |               |           |          |      |        |
| VARIOUS     |               |           |          |      |        |
| ANALYTICAL  |               |           |          |      |        |
|             |               |           |          |      |        |
| TECHNIQUES  |               |           |          |      |        |
| AND COMPARE |               |           |          |      |        |
| TO PRIMER   |               |           |          |      |        |
| DATA        |               |           |          |      |        |
| HISTORY AT  |               |           |          |      |        |
| MML. TASK   |               |           |          |      |        |
| III         |               |           |          |      |        |
| MATERIAL    |               |           |          |      |        |
|             |               |           |          |      |        |
| AND TPS     |               |           |          |      |        |
| ENGINEERING |               |           |          |      |        |
| TO PERFORM  |               |           |          |      |        |
| TESTS TO    |               |           |          |      |        |
| DEVELOP     |               |           |          |      |        |
| ACCEPTANCE  |               |           |          |      |        |
| RATIONALE   |               |           |          |      |        |
|             |               |           |          |      |        |
| FOR         |               |           |          |      |        |
| AS-BUILT    |               |           |          |      |        |
| HARDWARE    |               |           |          |      |        |
| USING       |               |           |          |      |        |
| PRIMER LOT  |               |           |          |      |        |
| 17-0218 AND |               |           |          |      |        |
| 0219. TESTS |               |           |          |      |        |
| TO BE       |               |           |          |      |        |
|             |               |           |          |      |        |
| CONDUCTED   |               |           |          |      |        |
| AT          |               |           |          |      |        |
| CYROGENIC   |               |           |          |      |        |
| CONDITIONS  |               |           |          |      |        |
| AND TO      |               |           |          |      |        |
| INCLUDE A   |               |           |          |      |        |
| STUDY ON    |               |           |          |      |        |
| CORROSION   |               |           |          |      |        |
|             |               |           |          |      |        |
| IMPACTS.    |               |           |          |      |        |
| TASK IV     |               |           |          |      |        |
| QUALITY     |               |           |          |      |        |
| ENGINEERNG  |               |           |          |      |        |
| LAB AND     |               |           |          |      |        |
| MATERIALS   |               |           |          |      |        |
| ENGINEERING |               |           |          |      |        |
| TO          |               |           |          |      |        |
|             |               |           |          |      |        |
| DEVELOP A   |               |           |          |      |        |
| TEST        |               |           |          |      |        |
| SCHEDULE    |               |           |          |      |        |
| WHICH WILL  |               |           |          |      |        |
| ASSESS THE  |               |           |          |      |        |
| CHEMICAL    |               |           |          |      |        |
| STABILITY   |               |           |          |      |        |
| OF          |               |           |          |      |        |
|             |               |           |          |      |        |
| LOTS 0218   |               |           |          |      |        |
| AND 0219    |               |           |          |      |        |
| WITH TIME.  |               |           |          |      |        |
| THE TEST    |               |           |          |      |        |
| SCHEDULE    |               |           |          |      |        |
| SHOULD      |               |           |          |      |        |
| INCLUDE THE |               |           |          |      |        |
| NEW         |               |           |          |      |        |
|             |               |           |          |      |        |
| LOT OF      |               |           |          |      |        |
| EPOXY       |               |           |          |      |        |
| PRIMER WITH |               |           |          |      |        |
| MA          |               |           |          |      |        |
| NUFACTURING |               |           |          |      |        |
| LOTS        |               |           |          |      |        |
| 17-4107 AND |               |           |          |      |        |
| 4108. TASK  |               |           |          |      |        |
| V           |               |           |          |      |        |
|             |               |           |          |      |        |
| MATERIALS   |               |           |          |      |        |
| E           |               |           |          |      |        |
| NGINEERING, |               |           |          |      |        |
| QUALITY     |               |           |          |      |        |
| E           |               |           |          |      |        |
| NGINEERING, |               |           |          |      |        |
| QUALITY     |               |           |          |      |        |
| ENGINEERING |               |           |          |      |        |
| LAB,        |               |           |          |      |        |
|             |               |           |          |      |        |
| AND         |               |           |          |      |        |
| RELIABILITY |               |           |          |      |        |
| ASSURANCE   |               |           |          |      |        |
| TO REVIEW   |               |           |          |      |        |
| SHELF LIFE  |               |           |          |      |        |
| R           |               |           |          |      |        |
| EQUIREMENTS |               |           |          |      |        |
| FOR         |               |           |          |      |        |
|             |               |           |          |      |        |
| MMS-Y-719   |               |           |          |      |        |
| PRIMER, AND |               |           |          |      |        |
| INCLUDE ALL |               |           |          |      |        |
| TPS         |               |           |          |      |        |
| MATERIALS.  |               |           |          |      |        |
| TAKS VI     |               |           |          |      |        |
| MATERIALS   |               |           |          |      |        |
|             |               |           |          |      |        |
| ENGINEERING |               |           |          |      |        |
| TO MONITOR  |               |           |          |      |        |
| AND REPORT  |               |           |          |      |        |
| TESTS       |               |           |          |      |        |
| CONDUCTED   |               |           |          |      |        |
| BY DESOTO   |               |           |          |      |        |
| ON LOTS     |               |           |          |      |        |
|             |               |           |          |      |        |
| 0218 AND    |               |           |          |      |        |
| 0219 TO     |               |           |          |      |        |
| EXPLAIN     |               |           |          |      |        |
| DIFFERENCE  |               |           |          |      |        |
| AND/OR      |               |           |          |      |        |
| CORRELATION |               |           |          |      |        |
| OF PIN      |               |           |          |      |        |
| HOLES AND   |               |           |          |      |        |
|             |               |           |          |      |        |
| PARTICLE    |               |           |          |      |        |
| EFFECTS     |               |           |          |      |        |
| NOTICED.    |               |           |          |      |        |
| 5/15/86 PRB |               |           |          |      |        |
| STATUS -    |               |           |          |      |        |
| CAPS IS     |               |           |          |      |        |
| BEING       |               |           |          |      |        |
| PUBLISHED   |               |           |          |      |        |
|             |               |           |          |      |        |
| FOR         |               |           |          |      |        |
| CLOSURE.    |               |           |          |      |        |
| 7/8/86      |               |           |          |      |        |
| PROBLEM     |               |           |          |      |        |
| CAUSE - THE |               |           |          |      |        |
| MOST        |               |           |          |      |        |
| PROBABLE    |               |           |          |      |        |
| CAUSE FOR   |               |           |          |      |        |
|             |               |           |          |      |        |
| PINHOLES IN |               |           |          |      |        |
| THE PRIMER  |               |           |          |      |        |
| IS A TRACE  |               |           |          |      |        |
| AMOUNT OF   |               |           |          |      |        |
| ORGANIC     |               |           |          |      |        |
| SILICONE    |               |           |          |      |        |
|             |               |           |          |      |        |
| IN          |               |           |          |      |        |
| ADVERTENTLY |               |           |          |      |        |
| INTRODUCED  |               |           |          |      |        |
| TO THE BASE |               |           |          |      |        |
| COMPONENT   |               |           |          |      |        |
| DURING      |               |           |          |      |        |
| NORMAL      |               |           |          |      |        |
|             |               |           |          |      |        |
| MA          |               |           |          |      |        |
| NUFACTURING |               |           |          |      |        |
| OPERATIONS  |               |           |          |      |        |
| AT DESOTO.  |               |           |          |      |        |
| THE         |               |           |          |      |        |
| CONTAMINANT |               |           |          |      |        |
| MAY HAVE    |               |           |          |      |        |
|             |               |           |          |      |        |
| CONTRIBUTED |               |           |          |      |        |
| TO PIGMENT  |               |           |          |      |        |
| AG          |               |           |          |      |        |
| GLOMERATION |               |           |          |      |        |
| UPON AGING, |               |           |          |      |        |
| AS NOTED BY |               |           |          |      |        |
| OVERSIZED   |               |           |          |      |        |
|             |               |           |          |      |        |
| PARTICLES   |               |           |          |      |        |
| IN THE      |               |           |          |      |        |
| CURED FILM. |               |           |          |      |        |
| FAILURE     |               |           |          |      |        |
| INVE        |               |           |          |      |        |
| STIGATION - |               |           |          |      |        |
| THE LH2     |               |           |          |      |        |
| TANK IS     |               |           |          |      |        |
|             |               |           |          |      |        |
| CLEANED AND |               |           |          |      |        |
| EPOXY       |               |           |          |      |        |
| PRIMED IN   |               |           |          |      |        |
| CELL \"P\", |               |           |          |      |        |
| BUILDING    |               |           |          |      |        |
| 131. AFTER  |               |           |          |      |        |
| THE PRIMING |               |           |          |      |        |
|             |               |           |          |      |        |
| OPERATION,  |               |           |          |      |        |
| THE TANK IS |               |           |          |      |        |
| VISUALLY    |               |           |          |      |        |
| INSPECTED   |               |           |          |      |        |
| FOR         |               |           |          |      |        |
| CONFORMANCE |               |           |          |      |        |
| TO PI 3004  |               |           |          |      |        |
|             |               |           |          |      |        |
| THE         |               |           |          |      |        |
| PINHOLES IN |               |           |          |      |        |
| THE EPOXY   |               |           |          |      |        |
| PRIMER WERE |               |           |          |      |        |
| FIRST       |               |           |          |      |        |
| NOTICED ON  |               |           |          |      |        |
| THE LH2     |               |           |          |      |        |
| TANK,       |               |           |          |      |        |
|             |               |           |          |      |        |
| LWT-34.     |               |           |          |      |        |
| SIMILAR     |               |           |          |      |        |
| PROBLEMS    |               |           |          |      |        |
| WERE        |               |           |          |      |        |
| REPORTED ON |               |           |          |      |        |
| THE LO2 AND |               |           |          |      |        |
| LH2, LWT-33 |               |           |          |      |        |
| AND         |               |           |          |      |        |
|             |               |           |          |      |        |
| AN LO2      |               |           |          |      |        |
| FEEDLINE    |               |           |          |      |        |
| PRIMED IN   |               |           |          |      |        |
| THE         |               |           |          |      |        |
| COMMODITIES |               |           |          |      |        |
| SHOP. ALL   |               |           |          |      |        |
| OF THE      |               |           |          |      |        |
| ABOVE       |               |           |          |      |        |
|             |               |           |          |      |        |
| DEFECTS     |               |           |          |      |        |
| WERE FOUND  |               |           |          |      |        |
| TO BE       |               |           |          |      |        |
| RELATED TO  |               |           |          |      |        |
| ONE LOT OF  |               |           |          |      |        |
| PRIMER      |               |           |          |      |        |
| WHICH WAS   |               |           |          |      |        |
|             |               |           |          |      |        |
| MA          |               |           |          |      |        |
| NUFACTURING |               |           |          |      |        |
| NUMBERS     |               |           |          |      |        |
| 17-0218     |               |           |          |      |        |
| (BASE) AND  |               |           |          |      |        |
| 17-0219     |               |           |          |      |        |
| (CURING     |               |           |          |      |        |
| AGENT). AN  |               |           |          |      |        |
|             |               |           |          |      |        |
| IN-DEPTH    |               |           |          |      |        |
| STUDY,      |               |           |          |      |        |
| COORDINATED |               |           |          |      |        |
| BY          |               |           |          |      |        |
| RELIABILITY |               |           |          |      |        |
| ASSURANCE   |               |           |          |      |        |
| AND         |               |           |          |      |        |
| CONDUCTED   |               |           |          |      |        |
| BY          |               |           |          |      |        |
|             |               |           |          |      |        |
| THREE       |               |           |          |      |        |
| L           |               |           |          |      |        |
| ABORATORIES |               |           |          |      |        |
| (MMC, MML,  |               |           |          |      |        |
| DESOTO),    |               |           |          |      |        |
| WAS         |               |           |          |      |        |
| PERFORMED   |               |           |          |      |        |
| ON THE      |               |           |          |      |        |
| SUSPECT     |               |           |          |      |        |
|             |               |           |          |      |        |
| PRIMER TO   |               |           |          |      |        |
| DETERMINE   |               |           |          |      |        |
| THE CAUSE   |               |           |          |      |        |
| AND EFFECT  |               |           |          |      |        |
| OF THE      |               |           |          |      |        |
| PINHOLES    |               |           |          |      |        |
| AND         |               |           |          |      |        |
| OVERSIZED   |               |           |          |      |        |
|             |               |           |          |      |        |
| PA          |               |           |          |      |        |
| RTICULATES. |               |           |          |      |        |
| RESULTS     |               |           |          |      |        |
| FROM        |               |           |          |      |        |
| DESOTO,     |               |           |          |      |        |
| IN          |               |           |          |      |        |
| CORPORATED, |               |           |          |      |        |
| SUGGESTS    |               |           |          |      |        |
| PIGMENT     |               |           |          |      |        |
|             |               |           |          |      |        |
| AG          |               |           |          |      |        |
| GLOMERATION |               |           |          |      |        |
| WAS MOST    |               |           |          |      |        |
| PROBABLY    |               |           |          |      |        |
| DUE TO      |               |           |          |      |        |
| UNDISPERSED |               |           |          |      |        |
| BETONE      |               |           |          |      |        |
| THICKENER   |               |           |          |      |        |
|             |               |           |          |      |        |
| EVEN THOUGH |               |           |          |      |        |
| REGRINDING  |               |           |          |      |        |
| THE SUSPECT |               |           |          |      |        |
| BASE        |               |           |          |      |        |
| MATERIAL    |               |           |          |      |        |
| SAT         |               |           |          |      |        |
| ISFACTORILY |               |           |          |      |        |
|             |               |           |          |      |        |
| REDISPERSED |               |           |          |      |        |
| THE PIGMENT |               |           |          |      |        |
| AND THE     |               |           |          |      |        |
| BETONE.     |               |           |          |      |        |
| USING       |               |           |          |      |        |
| VARIOUS     |               |           |          |      |        |
| ANALYTICAL  |               |           |          |      |        |
|             |               |           |          |      |        |
| TECHNIQUES  |               |           |          |      |        |
| (SEM, ESCA, |               |           |          |      |        |
| SRF,        |               |           |          |      |        |
| GS/MS),     |               |           |          |      |        |
| DESOTO      |               |           |          |      |        |
| FOUND NO    |               |           |          |      |        |
| SUBSTANTIAL |               |           |          |      |        |
|             |               |           |          |      |        |
| DIFFERENCES |               |           |          |      |        |
| BETWEEN THE |               |           |          |      |        |
| STANDARD    |               |           |          |      |        |
| AND SUSPECT |               |           |          |      |        |
| PRIMER      |               |           |          |      |        |
| COMPOSI-    |               |           |          |      |        |
| TIONS       |               |           |          |      |        |
|             |               |           |          |      |        |
| THEY COULD  |               |           |          |      |        |
| NOT ACCOUNT |               |           |          |      |        |
| FOR THE     |               |           |          |      |        |
| PINHOLE     |               |           |          |      |        |
| PHENOMENON  |               |           |          |      |        |
| WHICH WAS   |               |           |          |      |        |
| OBSERVED    |               |           |          |      |        |
|             |               |           |          |      |        |
| EVEN IN THE |               |           |          |      |        |
| REDISPE     |               |           |          |      |        |
| RSEDSUSPECT |               |           |          |      |        |
| BASE.       |               |           |          |      |        |
| MARTIN      |               |           |          |      |        |
| MARIETTA    |               |           |          |      |        |
| QUALITY     |               |           |          |      |        |
| EVALUATION  |               |           |          |      |        |
|             |               |           |          |      |        |
| LABS, USING |               |           |          |      |        |
| SMALL AREA  |               |           |          |      |        |
| ELECTRON    |               |           |          |      |        |
| S           |               |           |          |      |        |
| PECTROSCOPY |               |           |          |      |        |
| FOR         |               |           |          |      |        |
| CHEMICAL    |               |           |          |      |        |
| ANALY- SIS  |               |           |          |      |        |
|             |               |           |          |      |        |
| (ESCA),     |               |           |          |      |        |
| REPORTED    |               |           |          |      |        |
| FINDING     |               |           |          |      |        |
| SILICONE IN |               |           |          |      |        |
| THE BOTTOM  |               |           |          |      |        |
| OF SEVERAL  |               |           |          |      |        |
| PINHOLES    |               |           |          |      |        |
|             |               |           |          |      |        |
| THIS WAS    |               |           |          |      |        |
| THOUGHT     |               |           |          |      |        |
| INSIGNI-    |               |           |          |      |        |
| FICANT IN   |               |           |          |      |        |
| CAUSING     |               |           |          |      |        |
| PINHOLING   |               |           |          |      |        |
| AS THE      |               |           |          |      |        |
| CURING      |               |           |          |      |        |
|             |               |           |          |      |        |
| AGENT       |               |           |          |      |        |
| CONTAINS AN |               |           |          |      |        |
| A           |               |           |          |      |        |
| MINO-SILANE |               |           |          |      |        |
| COUPLING    |               |           |          |      |        |
| AGENT,      |               |           |          |      |        |
| WHICH ALSO  |               |           |          |      |        |
| FORMS       |               |           |          |      |        |
|             |               |           |          |      |        |
| O           |               |           |          |      |        |
| RGANOSILANE |               |           |          |      |        |
| BONDS TO    |               |           |          |      |        |
| THE         |               |           |          |      |        |
| SUBSTRATE.  |               |           |          |      |        |
| AT MMC\'S   |               |           |          |      |        |
| REQUEST,    |               |           |          |      |        |
| DESOTO      |               |           |          |      |        |
| PROVIDED    |               |           |          |      |        |
|             |               |           |          |      |        |
| A DIFFERENT |               |           |          |      |        |
| CURING      |               |           |          |      |        |
| AGENT       |               |           |          |      |        |
| WITHOUT THE |               |           |          |      |        |
| AMINOSILANE |               |           |          |      |        |
| COUPLER TO  |               |           |          |      |        |
| MIX WITH    |               |           |          |      |        |
|             |               |           |          |      |        |
| THE SUSPECT |               |           |          |      |        |
| BASE. ONCE  |               |           |          |      |        |
| MIXED, THE  |               |           |          |      |        |
| RESULTANT   |               |           |          |      |        |
| FILM STILL  |               |           |          |      |        |
| DISPLAYED   |               |           |          |      |        |
|             |               |           |          |      |        |
| PINHOLES,   |               |           |          |      |        |
| AND VIA     |               |           |          |      |        |
| SMALL AREA  |               |           |          |      |        |
| ESCA, AGAIN |               |           |          |      |        |
| INDICATED   |               |           |          |      |        |
| THE         |               |           |          |      |        |
| PRESENCE OF |               |           |          |      |        |
| AN          |               |           |          |      |        |
|             |               |           |          |      |        |
| ORGANIC     |               |           |          |      |        |
| SILICONE    |               |           |          |      |        |
| WITHIN THE  |               |           |          |      |        |
| PINHOLE.    |               |           |          |      |        |
| EXTENSIVE   |               |           |          |      |        |
| TESTING BY  |               |           |          |      |        |
| MML SHOWED  |               |           |          |      |        |
|             |               |           |          |      |        |
| DIFFERENCES |               |           |          |      |        |
| IN PARTICLE |               |           |          |      |        |
| MORPHOLOGY  |               |           |          |      |        |
| AND A MUCH  |               |           |          |      |        |
| LOWER       |               |           |          |      |        |
| SOLUTION    |               |           |          |      |        |
| VISCOSITY   |               |           |          |      |        |
|             |               |           |          |      |        |
| FOR THE     |               |           |          |      |        |
| SUSPECT     |               |           |          |      |        |
| MIXED       |               |           |          |      |        |
| COMPONENTS, |               |           |          |      |        |
| BUT DID NOT |               |           |          |      |        |
| FIND        |               |           |          |      |        |
| CHEMICAL    |               |           |          |      |        |
| VARIATIONS  |               |           |          |      |        |
|             |               |           |          |      |        |
| IN          |               |           |          |      |        |
| COMPOSITION |               |           |          |      |        |
| VERSUS THE  |               |           |          |      |        |
| STANDARD    |               |           |          |      |        |
| PRIMER. MML |               |           |          |      |        |
| DETERMINED  |               |           |          |      |        |
| THAT, AT    |               |           |          |      |        |
| THE         |               |           |          |      |        |
|             |               |           |          |      |        |
| BOTTOM OF   |               |           |          |      |        |
| EACH        |               |           |          |      |        |
| PINHOLE, A  |               |           |          |      |        |
| THIN LAYER  |               |           |          |      |        |
| OF PRIMER   |               |           |          |      |        |
| RESIN       |               |           |          |      |        |
| CONTAINING  |               |           |          |      |        |
|             |               |           |          |      |        |
| DISPERSED   |               |           |          |      |        |
| CORROSION   |               |           |          |      |        |
| RETARDING   |               |           |          |      |        |
| PIGMENTS    |               |           |          |      |        |
| COVERED THE |               |           |          |      |        |
| ALUMINUM    |               |           |          |      |        |
| SUBSTRATE   |               |           |          |      |        |
|             |               |           |          |      |        |
| A THOROUGH  |               |           |          |      |        |
| REVIEW OF   |               |           |          |      |        |
| THE DESOTO  |               |           |          |      |        |
| PROCESS AND |               |           |          |      |        |
| RAW         |               |           |          |      |        |
| MATERIAL    |               |           |          |      |        |
| INSPECTION  |               |           |          |      |        |
|             |               |           |          |      |        |
| TESTING WAS |               |           |          |      |        |
| CONDUCTED   |               |           |          |      |        |
| BY MMC      |               |           |          |      |        |
| MATERIALS   |               |           |          |      |        |
| ENGINEERING |               |           |          |      |        |
| AND DESOTO  |               |           |          |      |        |
|             |               |           |          |      |        |
| PERSONNEL,  |               |           |          |      |        |
| WITH NO     |               |           |          |      |        |
| CONCLUSIVE  |               |           |          |      |        |
| INDICATIONS |               |           |          |      |        |
| AS TO WHERE |               |           |          |      |        |
| OR HOW THE  |               |           |          |      |        |
|             |               |           |          |      |        |
| CO          |               |           |          |      |        |
| NTAMINATION |               |           |          |      |        |
| WAS         |               |           |          |      |        |
| INTRODUCED. |               |           |          |      |        |
| THE PRIMER  |               |           |          |      |        |
| APPLIED TO  |               |           |          |      |        |
| THE LH2     |               |           |          |      |        |
| TANK,       |               |           |          |      |        |
|             |               |           |          |      |        |
| LWT-34, WAS |               |           |          |      |        |
| EXTENSIVELY |               |           |          |      |        |
| TESTED BY   |               |           |          |      |        |
| MATERIALS   |               |           |          |      |        |
| ENGINEERING |               |           |          |      |        |
| ON THE      |               |           |          |      |        |
| FLIGHT      |               |           |          |      |        |
|             |               |           |          |      |        |
| HARDWARE    |               |           |          |      |        |
| AND TEST    |               |           |          |      |        |
| PANELS,     |               |           |          |      |        |
| WITH        |               |           |          |      |        |
| ACCEPTABLE  |               |           |          |      |        |
| RESULTS AS  |               |           |          |      |        |
| INDICATED   |               |           |          |      |        |
| BELOW: -    |               |           |          |      |        |
|             |               |           |          |      |        |
| FLIGHT      |               |           |          |      |        |
| HARDWARE    |               |           |          |      |        |
| TESTS       |               |           |          |      |        |
| WERE: - WET |               |           |          |      |        |
| ADHESION    |               |           |          |      |        |
| TAPE TEST   |               |           |          |      |        |
| (REF MARS   |               |           |          |      |        |
| T-83805)    |               |           |          |      |        |
|             |               |           |          |      |        |
| \-          |               |           |          |      |        |
| ELCOMETER   |               |           |          |      |        |
| TEST (REF   |               |           |          |      |        |
| MARS        |               |           |          |      |        |
| T-83805) -  |               |           |          |      |        |
| TEST PANELS |               |           |          |      |        |
| TEST        |               |           |          |      |        |
| WERE: - WET |               |           |          |      |        |
|             |               |           |          |      |        |
| ADHESION    |               |           |          |      |        |
| TAPE TEST - |               |           |          |      |        |
| ELCOMETER   |               |           |          |      |        |
| TEST - LAP  |               |           |          |      |        |
| SHEAR -     |               |           |          |      |        |
| CRYOFLEX -  |               |           |          |      |        |
| BOND        |               |           |          |      |        |
|             |               |           |          |      |        |
| TENSION -   |               |           |          |      |        |
| FINGER      |               |           |          |      |        |
| FLEX -      |               |           |          |      |        |
| CORROSION   |               |           |          |      |        |
| TESTING THE |               |           |          |      |        |
| SUSPECT     |               |           |          |      |        |
| EPOXY       |               |           |          |      |        |
| PRIMER BASE |               |           |          |      |        |
|             |               |           |          |      |        |
| AND CURING  |               |           |          |      |        |
| AGENT AND   |               |           |          |      |        |
| RAW         |               |           |          |      |        |
| MATERIALS   |               |           |          |      |        |
| UNDERWENT   |               |           |          |      |        |
| THE         |               |           |          |      |        |
| FOLLOWING   |               |           |          |      |        |
| ANALYSES: - |               |           |          |      |        |
|             |               |           |          |      |        |
| SCANNING    |               |           |          |      |        |
| ELECTRON    |               |           |          |      |        |
| MICROSCOPY  |               |           |          |      |        |
| (SEM) -     |               |           |          |      |        |
| ENERGY      |               |           |          |      |        |
| DISPERSIVE  |               |           |          |      |        |
| X-RAY       |               |           |          |      |        |
|             |               |           |          |      |        |
| S           |               |           |          |      |        |
| PECTROSCOPY |               |           |          |      |        |
| (EDX) -     |               |           |          |      |        |
| X-RAY       |               |           |          |      |        |
| FLUORESENCE |               |           |          |      |        |
| S           |               |           |          |      |        |
| PECTROSCOPY |               |           |          |      |        |
| (XRF) - GAS |               |           |          |      |        |
|             |               |           |          |      |        |
| CHROMATO    |               |           |          |      |        |
| GRAPHY/MASS |               |           |          |      |        |
| S           |               |           |          |      |        |
| PECTROSCOPY |               |           |          |      |        |
| (GS/MS) -   |               |           |          |      |        |
| SECONDARY   |               |           |          |      |        |
| ION MASS    |               |           |          |      |        |
|             |               |           |          |      |        |
| S           |               |           |          |      |        |
| PECTROSCOPY |               |           |          |      |        |
| (SIMS) -    |               |           |          |      |        |
| ELECTRON    |               |           |          |      |        |
| S           |               |           |          |      |        |
| PECTROSCOPY |               |           |          |      |        |
| FOR         |               |           |          |      |        |
| CHEMICAL    |               |           |          |      |        |
| ANALYSIS    |               |           |          |      |        |
|             |               |           |          |      |        |
| (ESCA) -    |               |           |          |      |        |
| C           |               |           |          |      |        |
| ONVENTIONAL |               |           |          |      |        |
| AND SMALL   |               |           |          |      |        |
| SPOT THE    |               |           |          |      |        |
| ONLY        |               |           |          |      |        |
| SIGNIFICANT |               |           |          |      |        |
| RESULTS,    |               |           |          |      |        |
|             |               |           |          |      |        |
| USING SMALL |               |           |          |      |        |
| SPOT ESCA,  |               |           |          |      |        |
| REVEALED A  |               |           |          |      |        |
| HIGH LEVEL  |               |           |          |      |        |
| OF SILICONE |               |           |          |      |        |
| IN THE      |               |           |          |      |        |
|             |               |           |          |      |        |
| OF THE      |               |           |          |      |        |
| PINHOLE.    |               |           |          |      |        |
| SMALL SPOT  |               |           |          |      |        |
| ESCA. THIS  |               |           |          |      |        |
| ORGANIC     |               |           |          |      |        |
| SILICONE    |               |           |          |      |        |
| COULD NOT   |               |           |          |      |        |
| BE          |               |           |          |      |        |
|             |               |           |          |      |        |
| DETECTED BY |               |           |          |      |        |
| OTHER       |               |           |          |      |        |
| TECHNIQUES  |               |           |          |      |        |
| AS IT IS    |               |           |          |      |        |
| PRESENT IN  |               |           |          |      |        |
| THE BASE,   |               |           |          |      |        |
| ONLY IN     |               |           |          |      |        |
|             |               |           |          |      |        |
| TRACE       |               |           |          |      |        |
| AMOUNTS.    |               |           |          |      |        |
| THIS        |               |           |          |      |        |
| CO          |               |           |          |      |        |
| NTAMINATION |               |           |          |      |        |
| IS BELIEVED |               |           |          |      |        |
| TO HAVE     |               |           |          |      |        |
| BEEN        |               |           |          |      |        |
|             |               |           |          |      |        |
| IN          |               |           |          |      |        |
| ADVERTENTLY |               |           |          |      |        |
| INTRODUCED  |               |           |          |      |        |
| DURING      |               |           |          |      |        |
| NORMAL      |               |           |          |      |        |
| MA          |               |           |          |      |        |
| NUFACTURING |               |           |          |      |        |
| OPERATIONS  |               |           |          |      |        |
| AT          |               |           |          |      |        |
|             |               |           |          |      |        |
| DESOTO AND  |               |           |          |      |        |
| MOST        |               |           |          |      |        |
| PROBABLY    |               |           |          |      |        |
| CONTRI-     |               |           |          |      |        |
| BUTED TO    |               |           |          |      |        |
| THE         |               |           |          |      |        |
| AG          |               |           |          |      |        |
| GLOMERATION |               |           |          |      |        |
| OF          |               |           |          |      |        |
|             |               |           |          |      |        |
| PIGMENTS.   |               |           |          |      |        |
| CORRECTIVE  |               |           |          |      |        |
| ACTIONS -   |               |           |          |      |        |
| THE PRIMER  |               |           |          |      |        |
| SPE         |               |           |          |      |        |
| CIFICATION, |               |           |          |      |        |
| STM K-719,  |               |           |          |      |        |
| HAS         |               |           |          |      |        |
|             |               |           |          |      |        |
| BEEN        |               |           |          |      |        |
| UPDATED TO  |               |           |          |      |        |
| REFLECT THE |               |           |          |      |        |
| FOLLOWING   |               |           |          |      |        |
| CHANGES: 1. |               |           |          |      |        |
| ADD         |               |           |          |      |        |
| FINENESS OF |               |           |          |      |        |
| GRIND       |               |           |          |      |        |
|             |               |           |          |      |        |
| CHECK AT    |               |           |          |      |        |
| VENDOR AND  |               |           |          |      |        |
| ON MMC      |               |           |          |      |        |
| INSPECTION  |               |           |          |      |        |
| TESTS. THIS |               |           |          |      |        |
| TEST        |               |           |          |      |        |
| INDICATES   |               |           |          |      |        |
| THE         |               |           |          |      |        |
|             |               |           |          |      |        |
| ULTIMATE    |               |           |          |      |        |
| PARTICLE    |               |           |          |      |        |
| SIZE IN THE |               |           |          |      |        |
| PRIMER.     |               |           |          |      |        |
| ACCEPTANCE  |               |           |          |      |        |
| CRITERIA IS |               |           |          |      |        |
| 6 OR        |               |           |          |      |        |
|             |               |           |          |      |        |
| BETTER ON   |               |           |          |      |        |
| HEGMAN      |               |           |          |      |        |
| GAUGE. 2.   |               |           |          |      |        |
| ADD         |               |           |          |      |        |
| STABILITY   |               |           |          |      |        |
| ON AGING    |               |           |          |      |        |
| TEST AT     |               |           |          |      |        |
| VENDOR ONLY |               |           |          |      |        |
|             |               |           |          |      |        |
| THIS IS AN  |               |           |          |      |        |
| ACCELERATED |               |           |          |      |        |
| AGING TEST  |               |           |          |      |        |
| WHICH WILL  |               |           |          |      |        |
| HASTEN THE  |               |           |          |      |        |
| FORMATION   |               |           |          |      |        |
| OF          |               |           |          |      |        |
|             |               |           |          |      |        |
| PIGMENT     |               |           |          |      |        |
| AG          |               |           |          |      |        |
| GLOMERATION |               |           |          |      |        |
| IF THE      |               |           |          |      |        |
| PRIMER      |               |           |          |      |        |
| SYSTEM IS   |               |           |          |      |        |
| UNSTABLE.   |               |           |          |      |        |
| ON SPRAYOUT |               |           |          |      |        |
|             |               |           |          |      |        |
| AFTER TEST, |               |           |          |      |        |
| THE CURED   |               |           |          |      |        |
| FILM SHALL  |               |           |          |      |        |
| NOT EXHIBIT |               |           |          |      |        |
| DEFECTS OR  |               |           |          |      |        |
| OVERSIZED   |               |           |          |      |        |
|             |               |           |          |      |        |
| PA          |               |           |          |      |        |
| RTICULATES. |               |           |          |      |        |
| THE ABOVE   |               |           |          |      |        |
| CORRECTIVE  |               |           |          |      |        |
| ACTIONS     |               |           |          |      |        |
| HAVE BEEN   |               |           |          |      |        |
| IMPLEMENTED |               |           |          |      |        |
| BY          |               |           |          |      |        |
|             |               |           |          |      |        |
| DESOTO,     |               |           |          |      |        |
| IN          |               |           |          |      |        |
| CORPORATED, |               |           |          |      |        |
| AND DEEMED  |               |           |          |      |        |
| ADEQUATE BY |               |           |          |      |        |
| RELIABILITY |               |           |          |      |        |
| ASSURANCE   |               |           |          |      |        |
| TO          |               |           |          |      |        |
|             |               |           |          |      |        |
| PRECLUDE    |               |           |          |      |        |
| THIS        |               |           |          |      |        |
| PROBLEM.    |               |           |          |      |        |
| ALL BARE    |               |           |          |      |        |
| METAL       |               |           |          |      |        |
| (PINHOLES)  |               |           |          |      |        |
| ARE TOUCHED |               |           |          |      |        |
| UP AS A     |               |           |          |      |        |
|             |               |           |          |      |        |
| STANDARD    |               |           |          |      |        |
| REPAIR.     |               |           |          |      |        |
| CLEARANCE   |               |           |          |      |        |
| OF          |               |           |          |      |        |
| EFFE        |               |           |          |      |        |
| CTIVITIES - |               |           |          |      |        |
| BASED ON    |               |           |          |      |        |
| THE         |               |           |          |      |        |
| ACCEPTABLE  |               |           |          |      |        |
|             |               |           |          |      |        |
| TEST        |               |           |          |      |        |
| RESULTS FOR |               |           |          |      |        |
| BOND        |               |           |          |      |        |
| TENSION AND |               |           |          |      |        |
| CRYOGLEX,   |               |           |          |      |        |
| THE         |               |           |          |      |        |
| CONSTRAINTS |               |           |          |      |        |
| ON AFFECTED |               |           |          |      |        |
|             |               |           |          |      |        |
| ET\'S       |               |           |          |      |        |
| (LWT\'S 28  |               |           |          |      |        |
| THROUGH 34) |               |           |          |      |        |
| ARE LIFTED  |               |           |          |      |        |
| (REFERENCE  |               |           |          |      |        |
| INTEROFFICE |               |           |          |      |        |
| MEMORANDUM  |               |           |          |      |        |
|             |               |           |          |      |        |
| 3           |               |           |          |      |        |
| 571-86-02.) |               |           |          |      |        |
| BASED ON    |               |           |          |      |        |
| THE         |               |           |          |      |        |
| CORRECTIVE  |               |           |          |      |        |
| ACTION      |               |           |          |      |        |
| IMPLEMENTED |               |           |          |      |        |
| AT DESOTO   |               |           |          |      |        |
| TO          |               |           |          |      |        |
|             |               |           |          |      |        |
| PERFORM     |               |           |          |      |        |
| STABILITY   |               |           |          |      |        |
| (AGING)     |               |           |          |      |        |
| TESTS,      |               |           |          |      |        |
| RELIABILITY |               |           |          |      |        |
| ASSURANCE   |               |           |          |      |        |
| DEEMS THESE |               |           |          |      |        |
|             |               |           |          |      |        |
| ACTIONS     |               |           |          |      |        |
| ACCEPTABLE  |               |           |          |      |        |
| TO CLOSE    |               |           |          |      |        |
| THIS CAPS.  |               |           |          |      |        |
| RECOMMEND   |               |           |          |      |        |
| THIS        |               |           |          |      |        |
| PROBLEM     |               |           |          |      |        |
| REPORT BE   |               |           |          |      |        |
|             |               |           |          |      |        |
| CLOSED      |               |           |          |      |        |
+-------------+---------------+-----------+----------+------+--------+
| **MSFC      |               |           |          |      |        |
| Response/Co |               |           |          |      |        |
| ncurrence** |               |           |          |      |        |
+-------------+---------------+-----------+----------+------+--------+

  -----------------------------------------------------------------------
  MSFC Problem Reporting and Corrective Action (PRACA) System

  ASSESSMENT ADDENDUM REPORT
  -----------------------------------------------------------------------

  --------------- ---------------------- ---------------- ------------ ----------- ------------
  **MSFC          **IFA#**\              **Contractor     **JSC#**\    **KSC#**\   **EICN#**\
  Report#**\      \--                    RPT#**\          \--          \--         \--
  A09681                                 T-052                                     

  **Asmnt         **Asmnt Part Name**\   **Asmnt                                   
  Part#**\        LH2 TANK BARREL SOFI   Serial/Lot#**\                            
  80974018409                            LWT-34                                    

  **HCRIT CD**\   **FCRIT CD**\          **CAUSE CD**\    **FAIL                   
  \--             1                      MP - MFG-PRC     MODE**\                  
                                                          MI -                     
                                                          INSULATION               

  **Asmnt FMEA**\ **Asmnt FM**\          **FMEA CSE**\    **FMEA                   
  5.2.2.1         1                      B                SCSE**\                  
                                                          5                        

  **Asmnt FMEA**\ **Asmnt FM**\          **FMEA CSE**\    **FMEA                   
  \--             \--                    \--              SCSE**\                  
                                                          \--                      

  **Asmnt FMEA**\ **Asmnt FM**\          **FMEA CSE**\    **FMEA                   
  \--             \--                    \--              SCSE**\                  
                                                          \--                      

  **Correlated    **Correlated Part#**\  **Correlated                              
  Part#**\        \--                    Part#**\                                  
  \--                                    \--                                       

  **Associated    **Associated LRU#**\   **Associated                              
  LRU#**\         \--                    LRU#**\                                   
  \--                                    \--                                       

  **MAJOR DESIGN                                                                   
  CHANGES**                                                                        

  **APRV DATE**\  **DESCRIPTION OF                                                 
  \--             CHANGES**\                                                       
                  \--                                                              

  **ASSESSMENT                                                                     
  TEXT**                                                                           
  --------------- ---------------------- ---------------- ------------ ----------- ------------