-----------------------------------------------------------------------
  **MSFC PRACA : 2003-02-12 08:41**

  -----------------------------------------------------------------------

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

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

+--------------+---------------+-----------+---------+------+--------+
| **MSFC       | **In-Flight   | **C       | **      | *    |        |
| Record \#**\ | Anomaly       | ontractor | JSC#**\ | *KSC |        |
| A16944       | Number**\     | Report    | \--     | #**\ |        |
|              | \--           | Number**\ |         | \--  |        |
|              |               | S-079     |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **Problem    |               |           |         |      |        |
| Title**\     |               |           |         |      |        |
| RING FRAME   |               |           |         |      |        |
| EXTRUSION    |               |           |         |      |        |
| CRACKING -   |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **EICN#**\   | **ELEMENT**\  | **Cont    | **F     | **   |        |
| \--          | ET            | ractor**\ | SCM#**\ | FCRI |        |
|              |               | LMMSS     | \--     | T**\ |        |
|              |               |           |         | \--  |        |
+--------------+---------------+-----------+---------+------+--------+
| **HCRIT**\   | **Sys_Lvl**\  | **Misc    |         |      |        |
| \--          | \--           | Codes**\  |         |      |        |
|              |               | A B C D E |         |      |        |
|              |               | F G H I J |         |      |        |
|              |               | K L M N O |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| *            | **NO          | *         | **SER/  | *    |        |
| *HARDWARE**\ | MENCLATURE**\ | *PART#**\ | LOT#**\ | *MAN |        |
| EIM          | \--           | \--       | \--     | UFAC |        |
|              |               |           |         | TURE |        |
|              |               |           |         | R**\ |        |
|              |               |           |         | \--  |        |
+--------------+---------------+-----------+---------+------+--------+
| *            | **NO          | *         | **SER/  | *    |        |
| *HARDWARE**\ | MENCLATURE**\ | *PART#**\ | LOT#**\ | *MAN |        |
| LRU          | \--           | \--       | \--     | UFAC |        |
|              |               |           |         | TURE |        |
|              |               |           |         | R**\ |        |
|              |               |           |         | \--  |        |
+--------------+---------------+-----------+---------+------+--------+
| *            | **NO          | *         | **SER/  | *    |        |
| *HARDWARE**\ | MENCLATURE**\ | *PART#**\ | LOT#**\ | *MAN |        |
| NCA          | LH2 TANK      | 02000-009 | LWT-82  | UFAC |        |
|              | PROOF TEST    |           |         | TURE |        |
|              |               |           |         | R**\ |        |
|              |               |           |         | MAF  |        |
+--------------+---------------+-----------+---------+------+--------+
| **Test/      | **Prevailing  | **F /     | **Fail  | **   |        |
| Operation**\ | Condtion**\   | U**\      | Mode**\ | Caus |        |
| AI - ATI     | F -           | UC        | MS -    | e**\ |        |
|              | FUNCTIONAL    |           | STRUCT  | M    |        |
|              |               |           |         | PP - |        |
|              |               |           |         | MFG- |        |
|              |               |           |         | PRC- |        |
|              |               |           |         | INST |        |
+--------------+---------------+-----------+---------+------+--------+
| **System**\  | **Defect**\   | **Ma      | **Work  | **   |        |
| PRESSURE VES | DC - BROKEN   | terial**\ | Con     | Fail |        |
|              |               | H - WELD  | tact**\ | Dat  |        |
|              |               |           | JOHN    | e**\ |        |
|              |               |           | ADAMS   | 04   |        |
|              |               |           |         | /10/ |        |
|              |               |           |         | 1996 |        |
+--------------+---------------+-----------+---------+------+--------+
| **Received   | **Date        | **FMEA    | **IFA:  | *    |        |
| at MSFC**\   | Isolated**\   | Ref       | Mission | *Mis |        |
| 09/30/1996   | 04/10/1996    | erence**\ | P       | sion |        |
|              |               | N/A       | hase**\ | Ela  |        |
|              |               |           | \--     | psed |        |
|              |               |           |         | Tim  |        |
|              |               |           |         | e**\ |        |
|              |               |           |         | \--  |        |
+--------------+---------------+-----------+---------+------+--------+
| *            |               | **S       |         | **   |        |
| *Location**\ |               | ymptom**\ |         | Time |        |
| MAF          |               | MS -      |         | Cycl |        |
|              |               | STRUCT    |         | e**\ |        |
|              |               |           |         | \--  |        |
+--------------+---------------+-----------+---------+------+--------+
| *            |               |           |         |      |        |
| *Effectivity |               |           |         |      |        |
| Text**\      |               |           |         |      |        |
| ET89         |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **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   | *       |      |        |
| Approved     | Req Defer     | Close**\  | *Remark |      |        |
| Defer Until  | Until Date**\ | \--       | /       |      |        |
| Date**\      | 04/03/1997    |           | Ac      |      |        |
| 04/28/1997   |               |           | tion**\ |      |        |
|              |               |           | 04/     |      |        |
|              |               |           | 03/1997 |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **I          |               |           |         |      |        |
| nvestigation |               |           |         |      |        |
| / Resolution |               |           |         |      |        |
| Summary**    |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **Last MSFC  | **CN RSLV     | **Defer   | **Add   | *    |        |
| Update**\    | SBMT**\       | Date**\   | Date**\ | *R/C |        |
| 02/13/2001   | 04/03/1997    | \--       | 09/     | Code |        |
|              |               |           | 30/1996 | s**\ |        |
|              |               |           |         | 2 -  |        |
|              |               |           |         | MFG  |        |
|              |               |           |         | \--  |        |
|              |               |           |         | \--  |        |
+--------------+---------------+-----------+---------+------+--------+
| **Assignee** |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **Design**\  | **Chief       | **S &     | **Pro   | *    |        |
| N. OTTE      | Engineer**\   | MA**\     | ject**\ | *Pro |        |
|              | M. PESSIN     | M. SMILES | \--     | ject |        |
|              |               |           |         | MG   |        |
|              |               |           |         | R**\ |        |
|              |               |           |         | P.   |        |
|              |               |           |         | CO   |        |
|              |               |           |         | UNTS |        |
+--------------+---------------+-----------+---------+------+--------+
| **Approval** |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **Design**\  | **Chief       | **S &     | **Pro   | *    |        |
| N. NOTTE     | Engineer**\   | MA**\     | ject**\ | *Pro |        |
|              | M. PESSIN     | J. GREEN  | \--     | ject |        |
|              |               |           |         | MG   |        |
|              |               |           |         | R**\ |        |
|              |               |           |         | P.   |        |
|              |               |           |         | CO   |        |
|              |               |           |         | UNTS |        |
+--------------+---------------+-----------+---------+------+--------+
| **PAC        | **PAC Review  | **MSFC    | **St    | *    |        |
| Assignee**\  | Complete**\   | Closure   | atus**\ | *F/A |        |
| R. TUCKER    | RT            | Date**\   | C -     | C    |        |
|              |               | 0         | CLOSED  | ompl |        |
|              |               | 4/12/1997 |         | 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 PERSON | **Approval    |           |         |      |        |
| L2**\        | Signature     |           |         |      |        |
| \--          | L3**\         |           |         |      |        |
|              | \--           |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **Related    | **Related     |           |         |      |        |
| Document     | Document      |           |         |      |        |
| Type**\      | ID**\         |           |         |      |        |
| \--          | N-3485,       |           |         |      |        |
|              | N-16497       |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **Related    |               |           |         |      |        |
| Document     |               |           |         |      |        |
| Title**\     |               |           |         |      |        |
| \--          |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **Related    | **Related     |           |         |      |        |
| Document     | Document      |           |         |      |        |
| Type**\      | ID**\         |           |         |      |        |
| \--          | \--           |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **Related    |               |           |         |      |        |
| Document     |               |           |         |      |        |
| Title**\     |               |           |         |      |        |
| \--          |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **Related    | **Related     |           |         |      |        |
| Document     | Document      |           |         |      |        |
| Type**\      | ID**\         |           |         |      |        |
| \--          | \--           |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **Related    |               |           |         |      |        |
| Document     |               |           |         |      |        |
| Title**\     |               |           |         |      |        |
| \--          |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **Contractor |               |           |         |      |        |
| Status       |               |           |         |      |        |
| Summary**    |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **Reliabi    |               |           |         |      |        |
| lity/Quality |               |           |         |      |        |
| Assurance    |               |           |         |      |        |
| Concerns,    |               |           |         |      |        |
| Recomm       |               |           |         |      |        |
| endations:** |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **Problem    |               |           |         |      |        |
| D            |               |           |         |      |        |
| escription** |               |           |         |      |        |
|              |               |           |         |      |        |
| THREE CRACKS |               |           |         |      |        |
| WERE         |               |           |         |      |        |
| DISCOVERED   |               |           |         |      |        |
| IN THE       |               |           |         |      |        |
| EXTRUSION AT |               |           |         |      |        |
| THE STATION  |               |           |         |      |        |
| 1871         |               |           |         |      |        |
|              |               |           |         |      |        |
| \"H-3\"      |               |           |         |      |        |
| CIR          |               |           |         |      |        |
| CUMFERENTIAL |               |           |         |      |        |
| WELD ON      |               |           |         |      |        |
| ET-89 DURING |               |           |         |      |        |
| THE STANDARD |               |           |         |      |        |
| POST-PROOF   |               |           |         |      |        |
|              |               |           |         |      |        |
| INSPECTION   |               |           |         |      |        |
| PROCESS. THE |               |           |         |      |        |
| CRACKS WERE  |               |           |         |      |        |
| DOCUMENTED   |               |           |         |      |        |
| ON N-16497.  |               |           |         |      |        |
| ONE OF       |               |           |         |      |        |
|              |               |           |         |      |        |
| THE CRACKS   |               |           |         |      |        |
| WAS FOUND IN |               |           |         |      |        |
| AN           |               |           |         |      |        |
| \"ADEQUATELY |               |           |         |      |        |
| PROOFED\"    |               |           |         |      |        |
| AREA; THE    |               |           |         |      |        |
| OTHER        |               |           |         |      |        |
|              |               |           |         |      |        |
| TWO WERE IN  |               |           |         |      |        |
| \"           |               |           |         |      |        |
| INADEQUATELY |               |           |         |      |        |
| PROOFED\"    |               |           |         |      |        |
| AREAS. ALL   |               |           |         |      |        |
| THREE CRACKS |               |           |         |      |        |
| WERE         |               |           |         |      |        |
|              |               |           |         |      |        |
| DIRECTLY     |               |           |         |      |        |
| FORWARD OF   |               |           |         |      |        |
| THE          |               |           |         |      |        |
| LONGERONS    |               |           |         |      |        |
|              |               |           |         |      |        |
| CRITICALITY: |               |           |         |      |        |
| CRACKS       |               |           |         |      |        |
| OCCURRED IN  |               |           |         |      |        |
| THE PARENT   |               |           |         |      |        |
| METAL OF THE |               |           |         |      |        |
|              |               |           |         |      |        |
| STATION 1871 |               |           |         |      |        |
| RING FRAME   |               |           |         |      |        |
| OF THE LH2   |               |           |         |      |        |
| TANK. THIS   |               |           |         |      |        |
| IS PART OF   |               |           |         |      |        |
| THE          |               |           |         |      |        |
|              |               |           |         |      |        |
| PRESSURE     |               |           |         |      |        |
| VESSEL WALL  |               |           |         |      |        |
| FOR THE TANK |               |           |         |      |        |
|              |               |           |         |      |        |
| \*REVISION   |               |           |         |      |        |
| \            |               |           |         |      |        |
| "D\"-UPDATES |               |           |         |      |        |
| AND CLOSES   |               |           |         |      |        |
| ALL TASKS.   |               |           |         |      |        |
| SEE          |               |           |         |      |        |
| ASTERISKS    |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **Contractor |               |           |         |      |        |
| In           |               |           |         |      |        |
| vestigation/ |               |           |         |      |        |
| Resolution** |               |           |         |      |        |
|              |               |           |         |      |        |
| GENERAL      |               |           |         |      |        |
|              |               |           |         |      |        |
| THE BLDG.    |               |           |         |      |        |
| 451 PROOF    |               |           |         |      |        |
| TEST         |               |           |         |      |        |
| FACILITY WAS |               |           |         |      |        |
| MODIFIED TO  |               |           |         |      |        |
| REPLACE      |               |           |         |      |        |
| AGEING       |               |           |         |      |        |
|              |               |           |         |      |        |
| EQUIPMENT    |               |           |         |      |        |
| THAT COULD   |               |           |         |      |        |
| NO LONGER BE |               |           |         |      |        |
| SUPPORTED.   |               |           |         |      |        |
| ET-88 HAD    |               |           |         |      |        |
| COMPLETED    |               |           |         |      |        |
|              |               |           |         |      |        |
| PROOF        |               |           |         |      |        |
| TESTING      |               |           |         |      |        |
| PRIOR TO THE |               |           |         |      |        |
| BLDG. 451    |               |           |         |      |        |
| M            |               |           |         |      |        |
| ODIFICATIONS |               |           |         |      |        |
| AND WAS USED |               |           |         |      |        |
|              |               |           |         |      |        |
| FOLLOWING    |               |           |         |      |        |
| THE          |               |           |         |      |        |
| M            |               |           |         |      |        |
| ODIFICATIONS |               |           |         |      |        |
| TO CHECK     |               |           |         |      |        |
| SYSTEMS      |               |           |         |      |        |
| OPERATION TO |               |           |         |      |        |
| 10% OF       |               |           |         |      |        |
|              |               |           |         |      |        |
| EXTERNAL     |               |           |         |      |        |
| LOADS AND    |               |           |         |      |        |
| 40% OF PROOF |               |           |         |      |        |
| PRESSURE     |               |           |         |      |        |
|              |               |           |         |      |        |
| ET-89 WAS    |               |           |         |      |        |
| THE FIRST    |               |           |         |      |        |
| TANK TO BE   |               |           |         |      |        |
| PROOF TESTED |               |           |         |      |        |
| USING THE    |               |           |         |      |        |
| MODIFIED     |               |           |         |      |        |
|              |               |           |         |      |        |
| EQUIPMENT.   |               |           |         |      |        |
| THE PROOF    |               |           |         |      |        |
| TEST TOOK    |               |           |         |      |        |
| LONGER THAN  |               |           |         |      |        |
| EXPECTED AT  |               |           |         |      |        |
| EACH LOAD    |               |           |         |      |        |
|              |               |           |         |      |        |
| REQUIREMENT  |               |           |         |      |        |
| DUE TO       |               |           |         |      |        |
| PROBLEMS     |               |           |         |      |        |
| WITH THE NEW |               |           |         |      |        |
| EQUIPMENT.   |               |           |         |      |        |
| AFTER THE    |               |           |         |      |        |
| PROOF        |               |           |         |      |        |
|              |               |           |         |      |        |
| TEST WAS     |               |           |         |      |        |
| COMPLETED,   |               |           |         |      |        |
| WHILE        |               |           |         |      |        |
| D            |               |           |         |      |        |
| ISCONNECTING |               |           |         |      |        |
| THE ET FROM  |               |           |         |      |        |
| THE          |               |           |         |      |        |
| HYDRAULIC    |               |           |         |      |        |
|              |               |           |         |      |        |
| CYLINDERS,   |               |           |         |      |        |
| TWO JACK     |               |           |         |      |        |
| STANDS ON    |               |           |         |      |        |
| THE TOOLING  |               |           |         |      |        |
| FAILED. THE  |               |           |         |      |        |
| I            |               |           |         |      |        |
| NVESTIGATION |               |           |         |      |        |
|              |               |           |         |      |        |
| BY THE       |               |           |         |      |        |
| SAFETY DEPT. |               |           |         |      |        |
| FOUND THE    |               |           |         |      |        |
| MOST         |               |           |         |      |        |
| PROBABLE     |               |           |         |      |        |
| CAUSE TO BE  |               |           |         |      |        |
| INADVERTENT  |               |           |         |      |        |
|              |               |           |         |      |        |
| APPLICATION  |               |           |         |      |        |
| OF LOAD BY   |               |           |         |      |        |
| \"CYLINDER   |               |           |         |      |        |
| 6\" DURING   |               |           |         |      |        |
| THE          |               |           |         |      |        |
| DISCONNECT   |               |           |         |      |        |
| OPERATIONS   |               |           |         |      |        |
|              |               |           |         |      |        |
| REFERENCE:   |               |           |         |      |        |
| SFR 96-075   |               |           |         |      |        |
|              |               |           |         |      |        |
| POST-PROOF   |               |           |         |      |        |
| X-RAYS OF    |               |           |         |      |        |
| ET-89 FOUND  |               |           |         |      |        |
| THREE CRACKS |               |           |         |      |        |
| IN THE       |               |           |         |      |        |
| STATION 1871 |               |           |         |      |        |
|              |               |           |         |      |        |
| RING FRAME   |               |           |         |      |        |
| PARENT METAL |               |           |         |      |        |
| ADJACENT TO  |               |           |         |      |        |
| THE \"H-3\"  |               |           |         |      |        |
| WELD. DUE TO |               |           |         |      |        |
| THE          |               |           |         |      |        |
|              |               |           |         |      |        |
| TOOLING      |               |           |         |      |        |
| DAMAGE WHICH |               |           |         |      |        |
| OCCURRED     |               |           |         |      |        |
| DURING THE   |               |           |         |      |        |
| PROOF TEST,  |               |           |         |      |        |
| THE INITIAL  |               |           |         |      |        |
|              |               |           |         |      |        |
| I            |               |           |         |      |        |
| NVESTIGATION |               |           |         |      |        |
| TASKS        |               |           |         |      |        |
| CONCENTRATED |               |           |         |      |        |
| ON           |               |           |         |      |        |
| DETERMINING  |               |           |         |      |        |
| WHETHER OR   |               |           |         |      |        |
| NOT THE      |               |           |         |      |        |
|              |               |           |         |      |        |
| TOOLING      |               |           |         |      |        |
| PROBLEM HAD  |               |           |         |      |        |
| CAUSED THE   |               |           |         |      |        |
| CRACKS. IT   |               |           |         |      |        |
| BECAME       |               |           |         |      |        |
| APPARENT     |               |           |         |      |        |
| THAT         |               |           |         |      |        |
|              |               |           |         |      |        |
| THERE WAS    |               |           |         |      |        |
| INSUFFICIENT |               |           |         |      |        |
| FORCE        |               |           |         |      |        |
| AVAILABLE    |               |           |         |      |        |
| DURING THE   |               |           |         |      |        |
| TOOLING      |               |           |         |      |        |
| INCIDENT     |               |           |         |      |        |
|              |               |           |         |      |        |
| TO HAVE      |               |           |         |      |        |
| CAUSED THE   |               |           |         |      |        |
| CRACKING     |               |           |         |      |        |
|              |               |           |         |      |        |
| THE          |               |           |         |      |        |
| I            |               |           |         |      |        |
| NVESTIGATION |               |           |         |      |        |
| WAS WIDENED  |               |           |         |      |        |
| TO INCLUDE   |               |           |         |      |        |
| ALL POSSIBLE |               |           |         |      |        |
| CAUSES OF    |               |           |         |      |        |
|              |               |           |         |      |        |
| THE CRACKS.  |               |           |         |      |        |
| TECHNICAL    |               |           |         |      |        |
| OPERATIONS   |               |           |         |      |        |
| OPENED A     |               |           |         |      |        |
| FORMAL       |               |           |         |      |        |
| I            |               |           |         |      |        |
| NVESTIGATION |               |           |         |      |        |
|              |               |           |         |      |        |
| AND PREPARED |               |           |         |      |        |
| A FAULT TREE |               |           |         |      |        |
| ANALYSIS IN  |               |           |         |      |        |
| ORDER TO     |               |           |         |      |        |
| ASSURE ALL   |               |           |         |      |        |
| AVENUES      |               |           |         |      |        |
|              |               |           |         |      |        |
| WERE         |               |           |         |      |        |
| CONSIDERED.  |               |           |         |      |        |
| I            |               |           |         |      |        |
| NVESTIGATION |               |           |         |      |        |
| INTO THE     |               |           |         |      |        |
| TOOLING USED |               |           |         |      |        |
| TO FABRICATE |               |           |         |      |        |
|              |               |           |         |      |        |
| THE TANK,    |               |           |         |      |        |
| WELDING      |               |           |         |      |        |
| METHODS,     |               |           |         |      |        |
| SEQUENCE OF  |               |           |         |      |        |
| ASSEMBLY,    |               |           |         |      |        |
| ETC. ALL LED |               |           |         |      |        |
| TO           |               |           |         |      |        |
|              |               |           |         |      |        |
| DEAD ENDS.   |               |           |         |      |        |
| I            |               |           |         |      |        |
| NVESTIGATION |               |           |         |      |        |
| INTO THE     |               |           |         |      |        |
| EXTRUSION    |               |           |         |      |        |
| MATERIAL     |               |           |         |      |        |
| PROPERTIES   |               |           |         |      |        |
|              |               |           |         |      |        |
| AND THE      |               |           |         |      |        |
| ASSOCIATED   |               |           |         |      |        |
| SUPPLIER     |               |           |         |      |        |
| PRODUCTION   |               |           |         |      |        |
| HISTORY DID  |               |           |         |      |        |
| IDENTIFY THE |               |           |         |      |        |
|              |               |           |         |      |        |
| CAUSE        |               |           |         |      |        |
|              |               |           |         |      |        |
| THE STATION  |               |           |         |      |        |
| 1871         |               |           |         |      |        |
| EXTRUSION,   |               |           |         |      |        |
| MADE OF 2219 |               |           |         |      |        |
| ALLOY, HAD   |               |           |         |      |        |
| LARGE,       |               |           |         |      |        |
|              |               |           |         |      |        |
| RE           |               |           |         |      |        |
| CRYSTALLIZED |               |           |         |      |        |
| GRAINS. THE  |               |           |         |      |        |
| EXPE         |               |           |         |      |        |
| CTED/DESIRED |               |           |         |      |        |
| GRAIN SIZE   |               |           |         |      |        |
| IS           |               |           |         |      |        |
|              |               |           |         |      |        |
| A            |               |           |         |      |        |
| PPROXIMATELY |               |           |         |      |        |
| TWENTY TO    |               |           |         |      |        |
| FIFTY GRAINS |               |           |         |      |        |
| PER INCH OF  |               |           |         |      |        |
| THICKNESS.   |               |           |         |      |        |
| THE          |               |           |         |      |        |
|              |               |           |         |      |        |
| GRAIN        |               |           |         |      |        |
| ORIENTATION  |               |           |         |      |        |
| IN THE       |               |           |         |      |        |
| LON          |               |           |         |      |        |
| G-TRANSVERSE |               |           |         |      |        |
| DIRECTION IS |               |           |         |      |        |
| EXPECTED TO  |               |           |         |      |        |
|              |               |           |         |      |        |
| BE AT A      |               |           |         |      |        |
| RIGHT ANGLE  |               |           |         |      |        |
| TO THE WELD  |               |           |         |      |        |
| CEN          |               |           |         |      |        |
| TERLINE/EDGE |               |           |         |      |        |
| OF THE       |               |           |         |      |        |
| EXTRUSION    |               |           |         |      |        |
|              |               |           |         |      |        |
| THE ACTUAL   |               |           |         |      |        |
| GRAIN SIZE   |               |           |         |      |        |
| AND          |               |           |         |      |        |
| ORIENTATION  |               |           |         |      |        |
| WAS FOUND TO |               |           |         |      |        |
| HAVE         |               |           |         |      |        |
| RESULTED     |               |           |         |      |        |
|              |               |           |         |      |        |
| IN AS FEW AS |               |           |         |      |        |
| THREE GRAINS |               |           |         |      |        |
| AT THE WELD  |               |           |         |      |        |
| EDGE IN A    |               |           |         |      |        |
| HALF-INCH    |               |           |         |      |        |
| THICK        |               |           |         |      |        |
|              |               |           |         |      |        |
| SECTION OF   |               |           |         |      |        |
| THE          |               |           |         |      |        |
| EXTRUSION.   |               |           |         |      |        |
| THE GRAIN    |               |           |         |      |        |
| ORIENTATION  |               |           |         |      |        |
| WAS PARALLEL |               |           |         |      |        |
| TO           |               |           |         |      |        |
|              |               |           |         |      |        |
| WELD         |               |           |         |      |        |
| CEN          |               |           |         |      |        |
| TERLINE/EDGE |               |           |         |      |        |
| OF THE       |               |           |         |      |        |
| EXTRUSION    |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK I.      |               |           |         |      |        |
| FAILURE      |               |           |         |      |        |
| I            |               |           |         |      |        |
| NVESTIGATION |               |           |         |      |        |
|              |               |           |         |      |        |
| A. TECHNICAL |               |           |         |      |        |
| OPERATIONS   |               |           |         |      |        |
| PREPARED A   |               |           |         |      |        |
| FORMAL       |               |           |         |      |        |
| REPORT TO    |               |           |         |      |        |
| DOCUMENT     |               |           |         |      |        |
|              |               |           |         |      |        |
| ALL THE      |               |           |         |      |        |
| RESEARCH AND |               |           |         |      |        |
| ANALYSIS     |               |           |         |      |        |
| PERFORMED IN |               |           |         |      |        |
| SUPPORT OF   |               |           |         |      |        |
| THE          |               |           |         |      |        |
|              |               |           |         |      |        |
| WELDED       |               |           |         |      |        |
| EXTRUSION    |               |           |         |      |        |
| I            |               |           |         |      |        |
| NVESTIGATION |               |           |         |      |        |
|              |               |           |         |      |        |
| RES          |               |           |         |      |        |
| PONSIBILITY: |               |           |         |      |        |
| W.           |               |           |         |      |        |
| SIGUR/4100   |               |           |         |      |        |
|              |               |           |         |      |        |
| R.           |               |           |         |      |        |
| SIMMS/4700   |               |           |         |      |        |
|              |               |           |         |      |        |
| \* COMPLETE: |               |           |         |      |        |
| APRIL 3,     |               |           |         |      |        |
| 1997         |               |           |         |      |        |
|              |               |           |         |      |        |
| \* CLOSURE   |               |           |         |      |        |
| STATEMENT    |               |           |         |      |        |
|              |               |           |         |      |        |
| REPORT ETO   |               |           |         |      |        |
| 826-2480 WAS |               |           |         |      |        |
| RELEASED. IT |               |           |         |      |        |
| DOCUMENTS    |               |           |         |      |        |
| THE          |               |           |         |      |        |
| DISCOVERY    |               |           |         |      |        |
|              |               |           |         |      |        |
| THE          |               |           |         |      |        |
| EXTRUSION    |               |           |         |      |        |
| CRACKING,    |               |           |         |      |        |
| THE FAULT    |               |           |         |      |        |
| TREE         |               |           |         |      |        |
| ANALYSIS,    |               |           |         |      |        |
| THE          |               |           |         |      |        |
| MATERIALS    |               |           |         |      |        |
|              |               |           |         |      |        |
| TESTING IN   |               |           |         |      |        |
| SUPPORT OF   |               |           |         |      |        |
| THE REPAIRS  |               |           |         |      |        |
| AND          |               |           |         |      |        |
| IN           |               |           |         |      |        |
| VESTIGATION, |               |           |         |      |        |
| AND THE      |               |           |         |      |        |
|              |               |           |         |      |        |
| CORRECTIVE   |               |           |         |      |        |
| ACTION       |               |           |         |      |        |
|              |               |           |         |      |        |
| B. TECHNICAL |               |           |         |      |        |
| OPERATIONS   |               |           |         |      |        |
| CONDUCTED    |               |           |         |      |        |
| TESTING OF   |               |           |         |      |        |
| THE WELDED   |               |           |         |      |        |
|              |               |           |         |      |        |
| STRENGTH OF  |               |           |         |      |        |
| EXTRUSIONS   |               |           |         |      |        |
| REPRESENTING |               |           |         |      |        |
| ALL          |               |           |         |      |        |
| EXTRUSION    |               |           |         |      |        |
| MATERIALS IN |               |           |         |      |        |
|              |               |           |         |      |        |
| STOCK AS     |               |           |         |      |        |
| WELL AS      |               |           |         |      |        |
| TESTING OF   |               |           |         |      |        |
| NEWLY        |               |           |         |      |        |
| PROCURED     |               |           |         |      |        |
| MATERIALS IN |               |           |         |      |        |
| THE          |               |           |         |      |        |
|              |               |           |         |      |        |
| REDESIGNED   |               |           |         |      |        |
| EXTRUSIONS,  |               |           |         |      |        |
| SEE TASK     |               |           |         |      |        |
| I.D. THE     |               |           |         |      |        |
| DATA         |               |           |         |      |        |
| OBTAINED IS  |               |           |         |      |        |
|              |               |           |         |      |        |
| BEING USED   |               |           |         |      |        |
| TO DEVELOP   |               |           |         |      |        |
| \"EXTRUSION  |               |           |         |      |        |
| TO PLATE     |               |           |         |      |        |
| WELD         |               |           |         |      |        |
| ALLOWABLES\" |               |           |         |      |        |
| FOR          |               |           |         |      |        |
|              |               |           |         |      |        |
| USE IN       |               |           |         |      |        |
| STRESS       |               |           |         |      |        |
| ANALYSIS OF  |               |           |         |      |        |
| COMPLETED    |               |           |         |      |        |
| LWT          |               |           |         |      |        |
| VEHICLES.    |               |           |         |      |        |
| FUTURE       |               |           |         |      |        |
| BUILDS       |               |           |         |      |        |
|              |               |           |         |      |        |
| OF LWT AND   |               |           |         |      |        |
| SLWT         |               |           |         |      |        |
| VEHICLES,    |               |           |         |      |        |
| BEGINNING    |               |           |         |      |        |
| WITH ET-91,  |               |           |         |      |        |
| WILL USE     |               |           |         |      |        |
| REVISED      |               |           |         |      |        |
|              |               |           |         |      |        |
| PEAKING AND  |               |           |         |      |        |
| MISMATCH     |               |           |         |      |        |
| REQUIREMENTS |               |           |         |      |        |
| FOR THE      |               |           |         |      |        |
| EXTRUSION    |               |           |         |      |        |
| WELDS BASED  |               |           |         |      |        |
|              |               |           |         |      |        |
| ON THE       |               |           |         |      |        |
| TESTING      |               |           |         |      |        |
|              |               |           |         |      |        |
| RES          |               |           |         |      |        |
| PONSIBILITY: |               |           |         |      |        |
| D.           |               |           |         |      |        |
| LO           |               |           |         |      |        |
| WE/4730\--G. |               |           |         |      |        |
| HORAK/4700   |               |           |         |      |        |
|              |               |           |         |      |        |
| A.           |               |           |         |      |        |
| KOON         |               |           |         |      |        |
| EY/4610\--R. |               |           |         |      |        |
| MEYER/4640   |               |           |         |      |        |
|              |               |           |         |      |        |
| \* COMPLETE: |               |           |         |      |        |
| FEBRUARY 24, |               |           |         |      |        |
| 1997         |               |           |         |      |        |
|              |               |           |         |      |        |
| \* CLOSURE   |               |           |         |      |        |
| STATEMENT    |               |           |         |      |        |
|              |               |           |         |      |        |
| TESTING OF   |               |           |         |      |        |
| EXISTING     |               |           |         |      |        |
| EXTRUSION    |               |           |         |      |        |
| MATERIAL ON  |               |           |         |      |        |
| LWTS AND     |               |           |         |      |        |
| SLWTS HAS    |               |           |         |      |        |
| BEEN         |               |           |         |      |        |
|              |               |           |         |      |        |
| COMPLETED.   |               |           |         |      |        |
| REVISED      |               |           |         |      |        |
| ALLOWABLES   |               |           |         |      |        |
| FOR THE      |               |           |         |      |        |
| EXISTING     |               |           |         |      |        |
| EXTRUSIONS   |               |           |         |      |        |
| HAVE         |               |           |         |      |        |
|              |               |           |         |      |        |
| BEEN         |               |           |         |      |        |
| PUBLISHED.   |               |           |         |      |        |
| CHANGE       |               |           |         |      |        |
| SUMMARY      |               |           |         |      |        |
| J31158       |               |           |         |      |        |
| CONTROLS THE |               |           |         |      |        |
| DESIGN/      |               |           |         |      |        |
|              |               |           |         |      |        |
| PROCURE      |               |           |         |      |        |
| MENT/TESTING |               |           |         |      |        |
| OF THE       |               |           |         |      |        |
| REVISED      |               |           |         |      |        |
| EXTRUSIONS   |               |           |         |      |        |
| FOR USE ON   |               |           |         |      |        |
| ETS 91       |               |           |         |      |        |
|              |               |           |         |      |        |
| THRU 95 AND  |               |           |         |      |        |
| ET9          |               |           |         |      |        |
| 8/SUBSEQUENT |               |           |         |      |        |
|              |               |           |         |      |        |
| C. STRESS    |               |           |         |      |        |
| ANALYSIS WAS |               |           |         |      |        |
| PERFORMED ON |               |           |         |      |        |
| ALL LWT      |               |           |         |      |        |
| VEHICLES     |               |           |         |      |        |
| THROUGH      |               |           |         |      |        |
|              |               |           |         |      |        |
| ET-90        |               |           |         |      |        |
|              |               |           |         |      |        |
| RES          |               |           |         |      |        |
| PONSIBILITY: |               |           |         |      |        |
| G.           |               |           |         |      |        |
| WAD          |               |           |         |      |        |
| GE/4420\--J. |               |           |         |      |        |
| DYE/4430     |               |           |         |      |        |
|              |               |           |         |      |        |
| \* COMPLETE: |               |           |         |      |        |
| FEBRUARY 13, |               |           |         |      |        |
| 1997         |               |           |         |      |        |
|              |               |           |         |      |        |
| \*CLOSURE    |               |           |         |      |        |
| STATEMENT    |               |           |         |      |        |
|              |               |           |         |      |        |
| ANALYSES OF  |               |           |         |      |        |
| ETS 80, 81,  |               |           |         |      |        |
| AND 83       |               |           |         |      |        |
| THROUGH 90   |               |           |         |      |        |
| ARE          |               |           |         |      |        |
| COMPLETE.    |               |           |         |      |        |
| ALL VEHICLES |               |           |         |      |        |
|              |               |           |         |      |        |
| WERE CLEARED |               |           |         |      |        |
| FOR FLIGHT   |               |           |         |      |        |
|              |               |           |         |      |        |
| D. 1.        |               |           |         |      |        |
| ENGINEERING  |               |           |         |      |        |
| STANDARDS    |               |           |         |      |        |
| FOR          |               |           |         |      |        |
| EXTRUSION    |               |           |         |      |        |
| GRAIN SIZE   |               |           |         |      |        |
| WERE REVISED |               |           |         |      |        |
|              |               |           |         |      |        |
| AND A NEW    |               |           |         |      |        |
| ENGINEERING  |               |           |         |      |        |
| STANDARD FOR |               |           |         |      |        |
| THE STATION  |               |           |         |      |        |
| 1871         |               |           |         |      |        |
|              |               |           |         |      |        |
| EXTRUSION    |               |           |         |      |        |
| SHAPE WAS    |               |           |         |      |        |
| GENERATED    |               |           |         |      |        |
|              |               |           |         |      |        |
| RES          |               |           |         |      |        |
| PONSIBILITY: |               |           |         |      |        |
| N.           |               |           |         |      |        |
| DUNC         |               |           |         |      |        |
| AN/4410\--R. |               |           |         |      |        |
| SIMMS/4400   |               |           |         |      |        |
|              |               |           |         |      |        |
| COMPLETE:    |               |           |         |      |        |
| SEPTEMBER 4, |               |           |         |      |        |
| 1996         |               |           |         |      |        |
|              |               |           |         |      |        |
| CLOSURE      |               |           |         |      |        |
| STATEMENT    |               |           |         |      |        |
|              |               |           |         |      |        |
| THE 2L2080   |               |           |         |      |        |
| AND 2L2081   |               |           |         |      |        |
| STANDARDS    |               |           |         |      |        |
| FOR THE      |               |           |         |      |        |
| EXTRUSION    |               |           |         |      |        |
| SHAPES TO BE |               |           |         |      |        |
| USED         |               |           |         |      |        |
|              |               |           |         |      |        |
| IN THE       |               |           |         |      |        |
| STATION 1871 |               |           |         |      |        |
| RING FRAME   |               |           |         |      |        |
| WERE         |               |           |         |      |        |
| RELEASED     |               |           |         |      |        |
| SEPTEMBER 4, |               |           |         |      |        |
| 1996         |               |           |         |      |        |
|              |               |           |         |      |        |
| THE DRAWINGS |               |           |         |      |        |
| DEFINE THE   |               |           |         |      |        |
| INTERNAL     |               |           |         |      |        |
| AREA IN      |               |           |         |      |        |
| WHICH GRAIN  |               |           |         |      |        |
| SIZE IS      |               |           |         |      |        |
|              |               |           |         |      |        |
| CONTROLLED.  |               |           |         |      |        |
| ENGINEERING  |               |           |         |      |        |
| MATERIAL     |               |           |         |      |        |
| S            |               |           |         |      |        |
| PECIFICATION |               |           |         |      |        |
| STM 3120-1   |               |           |         |      |        |
| WAS          |               |           |         |      |        |
|              |               |           |         |      |        |
| RELEASED     |               |           |         |      |        |
| JULY 12,     |               |           |         |      |        |
| 1996. THE    |               |           |         |      |        |
| STM DEFINES  |               |           |         |      |        |
| THE GRAIN    |               |           |         |      |        |
| SIZE         |               |           |         |      |        |
| CONTROLS     |               |           |         |      |        |
|              |               |           |         |      |        |
| FOR 2219     |               |           |         |      |        |
| ALLOY.       |               |           |         |      |        |
| TECHNICAL    |               |           |         |      |        |
| OPERATIONS   |               |           |         |      |        |
| IS           |               |           |         |      |        |
| CONTINUING   |               |           |         |      |        |
| TO REVISE    |               |           |         |      |        |
|              |               |           |         |      |        |
| DRAWINGS FOR |               |           |         |      |        |
| THE SLWT     |               |           |         |      |        |
| EXTRUSIONS   |               |           |         |      |        |
| TO PREVENT   |               |           |         |      |        |
| SIMILAR      |               |           |         |      |        |
| GRAIN SIZE   |               |           |         |      |        |
|              |               |           |         |      |        |
| PROBLEMS     |               |           |         |      |        |
| FROM         |               |           |         |      |        |
| OCCURRING IN |               |           |         |      |        |
| 2195 ALLOY   |               |           |         |      |        |
| SHAPES. STM  |               |           |         |      |        |
| 31A1-5 WAS   |               |           |         |      |        |
|              |               |           |         |      |        |
| RELEASED     |               |           |         |      |        |
| JULY 29,     |               |           |         |      |        |
| 1996, TO     |               |           |         |      |        |
| DEFINE GRAIN |               |           |         |      |        |
| SIZE         |               |           |         |      |        |
| CONTROLS FOR |               |           |         |      |        |
| 2195 ALLOY   |               |           |         |      |        |
|              |               |           |         |      |        |
| 2\.          |               |           |         |      |        |
| ENGINEERING  |               |           |         |      |        |
| STANDARDS    |               |           |         |      |        |
| FOR THE      |               |           |         |      |        |
| STATION 2058 |               |           |         |      |        |
| EXTRUSION    |               |           |         |      |        |
|              |               |           |         |      |        |
| SHAPES       |               |           |         |      |        |
| REVISED      |               |           |         |      |        |
|              |               |           |         |      |        |
| RES          |               |           |         |      |        |
| PONSIBILITY: |               |           |         |      |        |
| N.           |               |           |         |      |        |
| DUNC         |               |           |         |      |        |
| AN/4410\--E. |               |           |         |      |        |
| SWEET/4110   |               |           |         |      |        |
|              |               |           |         |      |        |
| COMPLETE:    |               |           |         |      |        |
| DECEMBER 20, |               |           |         |      |        |
| 1996         |               |           |         |      |        |
|              |               |           |         |      |        |
| CLOSURE      |               |           |         |      |        |
| STATEMENT    |               |           |         |      |        |
|              |               |           |         |      |        |
| THE 2L2016   |               |           |         |      |        |
| AND 2L2017   |               |           |         |      |        |
| STANDARDS    |               |           |         |      |        |
| WERE         |               |           |         |      |        |
| REPLACED BY  |               |           |         |      |        |
| NEW 2L2082   |               |           |         |      |        |
| AND          |               |           |         |      |        |
|              |               |           |         |      |        |
| 2L2083       |               |           |         |      |        |
| STANDARDS,   |               |           |         |      |        |
| WHICH        |               |           |         |      |        |
| CONTROL      |               |           |         |      |        |
| GRAIN SIZE   |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK CLOSED  |               |           |         |      |        |
|              |               |           |         |      |        |
| CAUSE        |               |           |         |      |        |
|              |               |           |         |      |        |
| THE          |               |           |         |      |        |
| EXTRUSION    |               |           |         |      |        |
| HAD          |               |           |         |      |        |
| EXCESSIVE    |               |           |         |      |        |
| GRAIN SIZE   |               |           |         |      |        |
| AT THE       |               |           |         |      |        |
| WELDED EDGE  |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK II.     |               |           |         |      |        |
| CORRECTIVE   |               |           |         |      |        |
| ACTION       |               |           |         |      |        |
|              |               |           |         |      |        |
| \* THE       |               |           |         |      |        |
| ENGINEERING  |               |           |         |      |        |
| DOCUMENTS    |               |           |         |      |        |
| FOR THE      |               |           |         |      |        |
| WELDED       |               |           |         |      |        |
| EXTRUSIONS   |               |           |         |      |        |
| WERE         |               |           |         |      |        |
|              |               |           |         |      |        |
| REVISED TO   |               |           |         |      |        |
| CONTROL      |               |           |         |      |        |
| GRAIN SIZE   |               |           |         |      |        |
| FOR FUTURE   |               |           |         |      |        |
| BUILDS. NEW  |               |           |         |      |        |
| WELD         |               |           |         |      |        |
|              |               |           |         |      |        |
| ALLOWABLES   |               |           |         |      |        |
| AND REPAIR   |               |           |         |      |        |
| METHODS WERE |               |           |         |      |        |
| CREATED FOR  |               |           |         |      |        |
| EXISTING ETS |               |           |         |      |        |
|              |               |           |         |      |        |
| WITH         |               |           |         |      |        |
| EXTRUSIONS   |               |           |         |      |        |
| THAT HAVE    |               |           |         |      |        |
| GRAIN SIZE   |               |           |         |      |        |
| PROBLEMS     |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK CLOSED  |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK III.    |               |           |         |      |        |
| CLEARANCE OF |               |           |         |      |        |
| E            |               |           |         |      |        |
| FFECTIVITIES |               |           |         |      |        |
|              |               |           |         |      |        |
| \*ETS 80,    |               |           |         |      |        |
| 81, AND 83   |               |           |         |      |        |
| THROUGH      |               |           |         |      |        |
| 9            |               |           |         |      |        |
| 0\--CLEARED. |               |           |         |      |        |
| STRESS       |               |           |         |      |        |
| ANALYSES     |               |           |         |      |        |
| HAVE         |               |           |         |      |        |
|              |               |           |         |      |        |
| CLEARED THE  |               |           |         |      |        |
| ETS FOR      |               |           |         |      |        |
| FLIGHT       |               |           |         |      |        |
|              |               |           |         |      |        |
| \*ETS 91     |               |           |         |      |        |
| THROUGH      |               |           |         |      |        |
| 9            |               |           |         |      |        |
| 5\--CLEARED. |               |           |         |      |        |
| ENGINEERING  |               |           |         |      |        |
| CHANGE       |               |           |         |      |        |
| SUMMARY      |               |           |         |      |        |
| J31158       |               |           |         |      |        |
|              |               |           |         |      |        |
| CONTROLS     |               |           |         |      |        |
| DESIGN AND   |               |           |         |      |        |
| TESTING OF   |               |           |         |      |        |
| THE          |               |           |         |      |        |
| EXTRUSION    |               |           |         |      |        |
| BEING        |               |           |         |      |        |
| PROCURED TO  |               |           |         |      |        |
|              |               |           |         |      |        |
| BUILD THESE  |               |           |         |      |        |
| ETS. WHEN    |               |           |         |      |        |
| RELEASED,    |               |           |         |      |        |
| THE REVISED  |               |           |         |      |        |
| PEAKING AND  |               |           |         |      |        |
| MISMATCH     |               |           |         |      |        |
|              |               |           |         |      |        |
| R            |               |           |         |      |        |
| EQUIREMENTS, |               |           |         |      |        |
| ENGINEERING  |               |           |         |      |        |
| DRAWING      |               |           |         |      |        |
| 80900000060, |               |           |         |      |        |
| WILL REFLECT |               |           |         |      |        |
| THE          |               |           |         |      |        |
|              |               |           |         |      |        |
| PROPERTIES   |               |           |         |      |        |
| OF           |               |           |         |      |        |
| EXTRUSIONS   |               |           |         |      |        |
| BEING        |               |           |         |      |        |
| PROCURED FOR |               |           |         |      |        |
| THESE        |               |           |         |      |        |
| E            |               |           |         |      |        |
| FFECTIVITIES |               |           |         |      |        |
|              |               |           |         |      |        |
| ETS 96 AND   |               |           |         |      |        |
| 9            |               |           |         |      |        |
| 7\--CLEARED. |               |           |         |      |        |
| THE WELD     |               |           |         |      |        |
| ACCEPTANCE   |               |           |         |      |        |
| MANUAL,      |               |           |         |      |        |
| ENGINEERING  |               |           |         |      |        |
| DRAWIN       |               |           |         |      |        |
|              |               |           |         |      |        |
| 80900000069  |               |           |         |      |        |
| HAS BEEN     |               |           |         |      |        |
| RELEASED     |               |           |         |      |        |
|              |               |           |         |      |        |
| \*ET-        |               |           |         |      |        |
| 98/SUBSEQUEN |               |           |         |      |        |
| T\--CLEARED. |               |           |         |      |        |
| ENGINEERING  |               |           |         |      |        |
| CHANGE       |               |           |         |      |        |
| SUMMARY      |               |           |         |      |        |
| J31158       |               |           |         |      |        |
|              |               |           |         |      |        |
| CONTROLS     |               |           |         |      |        |
| DESIGN AND   |               |           |         |      |        |
| TESTING OF   |               |           |         |      |        |
| THE          |               |           |         |      |        |
| EXTRUSION    |               |           |         |      |        |
| BEING        |               |           |         |      |        |
| PROCURED TO  |               |           |         |      |        |
|              |               |           |         |      |        |
| BUILD THESE  |               |           |         |      |        |
| ETS. WHEN    |               |           |         |      |        |
| RELEASED,    |               |           |         |      |        |
| THE REVISED  |               |           |         |      |        |
| PEAKING AND  |               |           |         |      |        |
| MISMATCH     |               |           |         |      |        |
|              |               |           |         |      |        |
| R            |               |           |         |      |        |
| EQUIREMENTS, |               |           |         |      |        |
| ENGINEERING  |               |           |         |      |        |
| DRAWING      |               |           |         |      |        |
| 80900000069, |               |           |         |      |        |
| WILL REFLECT |               |           |         |      |        |
| THE          |               |           |         |      |        |
|              |               |           |         |      |        |
| PROPERTIES   |               |           |         |      |        |
| OF           |               |           |         |      |        |
| EXTRUSIONS   |               |           |         |      |        |
| BEING        |               |           |         |      |        |
| PROCURED FOR |               |           |         |      |        |
| THESE        |               |           |         |      |        |
| E            |               |           |         |      |        |
| FFECTIVITIES |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK CLOSED  |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK IV.     |               |           |         |      |        |
| CAPS CLOSURE |               |           |         |      |        |
| SUMMARY      |               |           |         |      |        |
|              |               |           |         |      |        |
| THE          |               |           |         |      |        |
| POST-PROOF   |               |           |         |      |        |
| TEST CRACKS  |               |           |         |      |        |
| FOUND IN THE |               |           |         |      |        |
| ET-89 AND    |               |           |         |      |        |
| ET-90 LH2    |               |           |         |      |        |
| TANKS        |               |           |         |      |        |
|              |               |           |         |      |        |
| WERE THE     |               |           |         |      |        |
| RESULT OF    |               |           |         |      |        |
| LARGE GRAIN  |               |           |         |      |        |
| SIZE IN THE  |               |           |         |      |        |
| EXTRUSIONS.  |               |           |         |      |        |
| NEW WELD     |               |           |         |      |        |
|              |               |           |         |      |        |
| ALLOWABLES   |               |           |         |      |        |
| AND SPECIAL  |               |           |         |      |        |
| REPAIR       |               |           |         |      |        |
| TECHNIQUES   |               |           |         |      |        |
| WERE         |               |           |         |      |        |
| DEVELOPED    |               |           |         |      |        |
| FOR ALL      |               |           |         |      |        |
|              |               |           |         |      |        |
| AFFECTED     |               |           |         |      |        |
| ETS. THE     |               |           |         |      |        |
| ENGINEEERING |               |           |         |      |        |
| DOCUMENTS    |               |           |         |      |        |
| FOR THE      |               |           |         |      |        |
| EXTRUSIONS   |               |           |         |      |        |
| WERE         |               |           |         |      |        |
|              |               |           |         |      |        |
| REVISED TO   |               |           |         |      |        |
| CONTROL      |               |           |         |      |        |
| GRAIN SIZE   |               |           |         |      |        |
| FOR FUTURE   |               |           |         |      |        |
| BUILDS       |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK CLOSED  |               |           |         |      |        |
|              |               |           |         |      |        |
| THIS CAPS IS |               |           |         |      |        |
| CLOSED. NO   |               |           |         |      |        |
| FURTHER      |               |           |         |      |        |
| ACTION IS    |               |           |         |      |        |
| REQUIRED     |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **MSFC       |               |           |         |      |        |
| Response/C   |               |           |         |      |        |
| oncurrence** |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+

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

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

  --------------- ----------------- -------------------- ----------- ----------- ------------
  **MSFC          **IFA#**\         **Contractor RPT#**\ **JSC#**\   **KSC#**\   **EICN#**\
  Report#**\      \--               S-079                \--         \--         \--
  A16944                                                                         

  **Asmnt         **Asmnt Part      **Asmnt                                      
  Part#**\        Name**\           Serial/Lot#**\                               
  02000-009       LH2 RING FRAME    LWT-82                                       

  **HCRIT CD**\   **FCRIT CD**\     **CAUSE CD**\        **FAIL                  
  \--             \--               MPP - MFG-PRC-INST   MODE**\                 
                                                         MS - STRUCT             

  **Asmnt FMEA**\ **Asmnt FM**\     **FMEA CSE**\        **FMEA                  
  N/A             \--               \--                  SCSE**\                 
                                                         \--                     

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

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

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

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

  **MAJOR DESIGN                                                                 
  CHANGES**                                                                      

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

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