-----------------------------------------------------------------------
  **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 |        |
| A17820       | Number**\     | Report    | \--     | #**\ |        |
|              | \--           | Number**\ |         | \--  |        |
|              |               | E-170     |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **Problem    |               |           |         |      |        |
| Title**\     |               |           |         |      |        |
| LH2 LIQUID   |               |           |         |      |        |
| LEVEL SENSOR |               |           |         |      |        |
| FAILED       |               |           |         |      |        |
| DIELECTRIC   |               |           |         |      |        |
| WITHSTANDING |               |           |         |      |        |
| VOLTAGE ATP  |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **EICN#**\   | **ELEMENT**\  | **Cont    | **F     | **   |        |
| \--          | ET            | ractor**\ | SCM#**\ | FCRI |        |
|              |               | LMM       | \--     | T**\ |        |
|              |               |           |         | 1R   |        |
+--------------+---------------+-----------+---------+------+--------+
| **HCRIT**\   | **Sys_Lvl**\  | **Misc    |         |      |        |
| 1R           | \--           | 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 LIQUID    | 74L4-2    | 0003354 | UFAC |        |
|              | LEVEL SEN     |           |         | TURE |        |
|              |               |           |         | R**\ |        |
|              |               |           |         | GOOD |        |
|              |               |           |         | RICH |        |
+--------------+---------------+-----------+---------+------+--------+
| **Test/      | **Prevailing  | **F /     | **Fail  | **   |        |
| Operation**\ | Condtion**\   | U**\      | Mode**\ | Caus |        |
| AI - ATI     | FT - FUNCTL   | F         | EL -    | e**\ |        |
|              | TEST          |           | SHORT   | DH - |        |
|              |               |           |         | DES  |        |
|              |               |           |         | -HDW |        |
+--------------+---------------+-----------+---------+------+--------+
| **System**\  | **Defect**\   | **Ma      | **Work  | **   |        |
| ELECTRICAL   | EM - ELADJ    | terial**\ | Con     | Fail |        |
|              |               | E - EL    | tact**\ | Dat  |        |
|              |               | C/W       | M. PENO | e**\ |        |
|              |               |           |         | 11   |        |
|              |               |           |         | /19/ |        |
|              |               |           |         | 2002 |        |
+--------------+---------------+-----------+---------+------+--------+
| **Received   | **Date        | **FMEA    | **IFA:  | *    |        |
| at MSFC**\   | Isolated**\   | Ref       | Mission | *Mis |        |
| 11/21/2002   | 11/21/2002    | erence**\ | P       | sion |        |
|              |               | 3.6.1.1   | hase**\ | Ela  |        |
|              |               |           | \--     | psed |        |
|              |               |           |         | Tim  |        |
|              |               |           |         | e**\ |        |
|              |               |           |         | \--  |        |
+--------------+---------------+-----------+---------+------+--------+
| *            |               | **S       |         | **   |        |
| *Location**\ |               | ymptom**\ |         | Time |        |
| GOODRICH     |               | EL -      |         | Cycl |        |
|              |               | SHORT     |         | e**\ |        |
|              |               |           |         | \--  |        |
+--------------+---------------+-----------+---------+------+--------+
| *            |               |           |         |      |        |
| *Effectivity |               |           |         |      |        |
| Text**\      |               |           |         |      |        |
| \--          |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **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**\      | 01/31/2003    |           | Ac      |      |        |
| 01/31/2003   |               |           | tion**\ |      |        |
|              |               |           | \--     |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **I          |               |           |         |      |        |
| nvestigation |               |           |         |      |        |
| / Resolution |               |           |         |      |        |
| Summary**    |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **Last MSFC  | **CN RSLV     | **Defer   | **Add   | *    |        |
| Update**\    | SBMT**\       | Date**\   | Date**\ | *R/C |        |
| 01/30/2003   | \--           | \--       | 11/     | Code |        |
|              |               |           | 21/2002 | s**\ |        |
|              |               |           |         | 0 -  |        |
|              |               |           |         | EXPL |        |
|              |               |           |         | \--  |        |
|              |               |           |         | \--  |        |
+--------------+---------------+-----------+---------+------+--------+
| **Assignee** |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **Design**\  | **Chief       | **S &     | **Pro   | *    |        |
| M. BUTLER    | Engineer**\   | MA**\     | ject**\ | *Pro |        |
|              | T. GREENWOOD  | K. LAYNE  | \--     | ject |        |
|              |               |           |         | MG   |        |
|              |               |           |         | R**\ |        |
|              |               |           |         | J.   |        |
|              |               |           |         | SME  |        |
|              |               |           |         | LSER |        |
+--------------+---------------+-----------+---------+------+--------+
| **Approval** |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **Design**\  | **Chief       | **S &     | **Pro   | *    |        |
| M. BUTLER    | Engineer**\   | MA**\     | ject**\ | *Pro |        |
|              | T. GREENWOOD  | K. LAYNE  | \--     | ject |        |
|              |               |           |         | MG   |        |
|              |               |           |         | R**\ |        |
|              |               |           |         | J.   |        |
|              |               |           |         | SME  |        |
|              |               |           |         | LSER |        |
+--------------+---------------+-----------+---------+------+--------+
| **PAC        | **PAC Review  | **MSFC    | **St    | *    |        |
| Assignee**\  | Complete**\   | Closure   | atus**\ | *F/A |        |
| T. WHITE     | TLW           | Date**\   | C -     | C    |        |
|              |               | 0         | CLOSED  | ompl |        |
|              |               | 1/30/2003 |         | 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**\         |           |         |      |        |
| NC - PROB    | NCD N052304   |           |         |      |        |
| RPT          |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **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** |               |           |         |      |        |
|              |               |           |         |      |        |
| LIQUID LEVEL |               |           |         |      |        |
| SENSOR S/N   |               |           |         |      |        |
| 0003354      |               |           |         |      |        |
| FAILED       |               |           |         |      |        |
| DIELECTRIC   |               |           |         |      |        |
| WITHSTANDING |               |           |         |      |        |
| VOLTAGE      |               |           |         |      |        |
|              |               |           |         |      |        |
| TEST AT THE  |               |           |         |      |        |
| SUPPLIER,    |               |           |         |      |        |
| GOODRICH.    |               |           |         |      |        |
| SUPPLIER     |               |           |         |      |        |
| ACCEPTANCE   |               |           |         |      |        |
| TEST (ATP)   |               |           |         |      |        |
| 945,         |               |           |         |      |        |
|              |               |           |         |      |        |
| REVISION AB, |               |           |         |      |        |
| PARAGRAPH    |               |           |         |      |        |
| 6.2 REQUIRES |               |           |         |      |        |
| 500 VOLTS    |               |           |         |      |        |
| ALTERNATING  |               |           |         |      |        |
| CURRENT BE   |               |           |         |      |        |
|              |               |           |         |      |        |
| APPLIED TO   |               |           |         |      |        |
| THE PART FOR |               |           |         |      |        |
| ONE MINUTE.  |               |           |         |      |        |
| THERE SHALL  |               |           |         |      |        |
| BE NO        |               |           |         |      |        |
| EVIDENCE OF  |               |           |         |      |        |
| ARC-         |               |           |         |      |        |
|              |               |           |         |      |        |
| OVER OR      |               |           |         |      |        |
| LEAKAGE      |               |           |         |      |        |
| CURRENT      |               |           |         |      |        |
| GREATER THAN |               |           |         |      |        |
| 1.8          |               |           |         |      |        |
| MILLIAMPS.   |               |           |         |      |        |
| THE SENSOR   |               |           |         |      |        |
| FAILED       |               |           |         |      |        |
|              |               |           |         |      |        |
| WITH A       |               |           |         |      |        |
| LEAKAGE      |               |           |         |      |        |
| CURRENT OF   |               |           |         |      |        |
| 2.9          |               |           |         |      |        |
| MILLIAMPS.   |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **Contractor |               |           |         |      |        |
| In           |               |           |         |      |        |
| vestigation/ |               |           |         |      |        |
| Resolution** |               |           |         |      |        |
|              |               |           |         |      |        |
| 11/21/2002 - |               |           |         |      |        |
| CONTRACTOR   |               |           |         |      |        |
| SUBMITTED    |               |           |         |      |        |
| OPENER       |               |           |         |      |        |
| REQUEST AS   |               |           |         |      |        |
| FOLLOWS:     |               |           |         |      |        |
|              |               |           |         |      |        |
| PROBLEM      |               |           |         |      |        |
| DESCRIPTION: |               |           |         |      |        |
|              |               |           |         |      |        |
| \            |               |           |         |      |        |
| -\-\-\-\-\-\ |               |           |         |      |        |
| -\-\-\-\-\-\ |               |           |         |      |        |
| -\-\-\-\-\-- |               |           |         |      |        |
|              |               |           |         |      |        |
| LIQUID LEVEL |               |           |         |      |        |
| SENSOR S/N   |               |           |         |      |        |
| 0003354      |               |           |         |      |        |
| FAILED       |               |           |         |      |        |
| DIELECTRIC   |               |           |         |      |        |
| WITHSTANDING |               |           |         |      |        |
| VOLTAGE      |               |           |         |      |        |
|              |               |           |         |      |        |
| TEST AT THE  |               |           |         |      |        |
| SUPPLIER,    |               |           |         |      |        |
| GOODRICH.    |               |           |         |      |        |
| SUPPLIER     |               |           |         |      |        |
| ACCEPTANCE   |               |           |         |      |        |
| TEST (ATP)   |               |           |         |      |        |
| 945,         |               |           |         |      |        |
|              |               |           |         |      |        |
| REVISION AB, |               |           |         |      |        |
| PARAGRAPH    |               |           |         |      |        |
| 6.2 REQUIRES |               |           |         |      |        |
| 500 VOLTS    |               |           |         |      |        |
| ALTERNATING  |               |           |         |      |        |
| CURRENT BE   |               |           |         |      |        |
|              |               |           |         |      |        |
| APPLIED TO   |               |           |         |      |        |
| THE PART FOR |               |           |         |      |        |
| ONE MINUTE.  |               |           |         |      |        |
| THERE SHALL  |               |           |         |      |        |
| BE NO        |               |           |         |      |        |
| EVIDENCE OF  |               |           |         |      |        |
| ARC-         |               |           |         |      |        |
|              |               |           |         |      |        |
| OVER OR      |               |           |         |      |        |
| LEAKAGE      |               |           |         |      |        |
| CURRENT      |               |           |         |      |        |
| GREATER THAN |               |           |         |      |        |
| 1.8          |               |           |         |      |        |
| MILLIAMPS.   |               |           |         |      |        |
| THE SENSOR   |               |           |         |      |        |
| FAILED       |               |           |         |      |        |
|              |               |           |         |      |        |
| WITH A       |               |           |         |      |        |
| LEAKAGE      |               |           |         |      |        |
| CURRENT OF   |               |           |         |      |        |
| 2.9          |               |           |         |      |        |
| MILLIAMPS.   |               |           |         |      |        |
|              |               |           |         |      |        |
| GENERAL:     |               |           |         |      |        |
|              |               |           |         |      |        |
| \-\          |               |           |         |      |        |
| -\-\-\-\-\-- |               |           |         |      |        |
|              |               |           |         |      |        |
| TWELVE       |               |           |         |      |        |
| 74L4-2       |               |           |         |      |        |
| SENSORS ARE  |               |           |         |      |        |
| USED IN THE  |               |           |         |      |        |
| LH2 TANK TO  |               |           |         |      |        |
| MONITOR      |               |           |         |      |        |
| DISCRETE     |               |           |         |      |        |
|              |               |           |         |      |        |
| LEVELS OF    |               |           |         |      |        |
| LH2. WHEN    |               |           |         |      |        |
| THE SENSOR   |               |           |         |      |        |
| IS IMMERSED  |               |           |         |      |        |
| IN THE       |               |           |         |      |        |
| LIQUID       |               |           |         |      |        |
| PROPELLANT   |               |           |         |      |        |
|              |               |           |         |      |        |
| (WET) THE    |               |           |         |      |        |
| SIGNAL       |               |           |         |      |        |
| VOLTAGE FROM |               |           |         |      |        |
| THE          |               |           |         |      |        |
| ELECTRONICS  |               |           |         |      |        |
| SHALL BE     |               |           |         |      |        |
| ZERO. WHEN   |               |           |         |      |        |
| THE          |               |           |         |      |        |
|              |               |           |         |      |        |
| SENSOR IS    |               |           |         |      |        |
| FREE OF THE  |               |           |         |      |        |
| LIQUID (DRY) |               |           |         |      |        |
| THE SIGNAL   |               |           |         |      |        |
| VOLTAGE FROM |               |           |         |      |        |
| THE          |               |           |         |      |        |
|              |               |           |         |      |        |
| ELECTRONICS  |               |           |         |      |        |
| SHALL BE 28  |               |           |         |      |        |
| VOLTS DC.    |               |           |         |      |        |
| THE LEVEL    |               |           |         |      |        |
| SENSOR       |               |           |         |      |        |
| UTILIZES THE |               |           |         |      |        |
|              |               |           |         |      |        |
| DECREASE IN  |               |           |         |      |        |
| THE          |               |           |         |      |        |
| ELECTRICAL   |               |           |         |      |        |
| RESISTANCE   |               |           |         |      |        |
| OF A METAL   |               |           |         |      |        |
| WHEN COOLED  |               |           |         |      |        |
| TO DETECT    |               |           |         |      |        |
|              |               |           |         |      |        |
| THE PRESENCE |               |           |         |      |        |
| OF A         |               |           |         |      |        |
| CRYOGENIC    |               |           |         |      |        |
| FLUID. THE   |               |           |         |      |        |
| SENSOR USES  |               |           |         |      |        |
| A GOLD       |               |           |         |      |        |
| FLASHED      |               |           |         |      |        |
|              |               |           |         |      |        |
| PLATINUM     |               |           |         |      |        |
| WIRE, .0005  |               |           |         |      |        |
| INCH IN      |               |           |         |      |        |
| DIAMETER, AS |               |           |         |      |        |
| THE SENSING  |               |           |         |      |        |
| ELEMENT. THE |               |           |         |      |        |
|              |               |           |         |      |        |
| LEVEL SENSOR |               |           |         |      |        |
| SIGNAL       |               |           |         |      |        |
| CONDITIONER, |               |           |         |      |        |
| WHICH IS     |               |           |         |      |        |
| MOUNTED IN   |               |           |         |      |        |
| THE ORBITER, |               |           |         |      |        |
|              |               |           |         |      |        |
| PROVIDES A   |               |           |         |      |        |
| CONSTANT     |               |           |         |      |        |
| CURRENT TO   |               |           |         |      |        |
| THE SENSING  |               |           |         |      |        |
| ELEMENT,     |               |           |         |      |        |
| WHICH CAUSES |               |           |         |      |        |
| IT TO        |               |           |         |      |        |
|              |               |           |         |      |        |
| RISE IN      |               |           |         |      |        |
| TEMPERATURE. |               |           |         |      |        |
| THE          |               |           |         |      |        |
| TEMPERATURE  |               |           |         |      |        |
| AND          |               |           |         |      |        |
| RESISTANCE   |               |           |         |      |        |
| OF THE       |               |           |         |      |        |
| ELEMENT      |               |           |         |      |        |
|              |               |           |         |      |        |
| DECREASE     |               |           |         |      |        |
| RADICALLY    |               |           |         |      |        |
| WHEN         |               |           |         |      |        |
| IMMERSED IN  |               |           |         |      |        |
| A CRYOGENIC  |               |           |         |      |        |
| LIQUID. THE  |               |           |         |      |        |
| SIGNAL       |               |           |         |      |        |
|              |               |           |         |      |        |
| CONDITIONER  |               |           |         |      |        |
| DETECTS THE  |               |           |         |      |        |
| DECREASE IN  |               |           |         |      |        |
| RESISTANCE   |               |           |         |      |        |
| AND CONVERTS |               |           |         |      |        |
| IT TO        |               |           |         |      |        |
|              |               |           |         |      |        |
| A \"WET\"    |               |           |         |      |        |
| OUTPUT       |               |           |         |      |        |
| SIGNAL. THE  |               |           |         |      |        |
| SIGNAL       |               |           |         |      |        |
| CONDITIONER  |               |           |         |      |        |
| IS ALSO      |               |           |         |      |        |
| DESIGNED TO  |               |           |         |      |        |
| GIVE         |               |           |         |      |        |
|              |               |           |         |      |        |
| A \"WET\"    |               |           |         |      |        |
| SIGNAL IN    |               |           |         |      |        |
| THE EVENT OF |               |           |         |      |        |
| AN OPEN      |               |           |         |      |        |
| CIRCUIT IN   |               |           |         |      |        |
| THE LEVEL    |               |           |         |      |        |
| SENSOR.      |               |           |         |      |        |
|              |               |           |         |      |        |
| BASED ON THE |               |           |         |      |        |
| VOLTAGE      |               |           |         |      |        |
| ACROSS THE   |               |           |         |      |        |
| SENSING      |               |           |         |      |        |
| ELEMENTS,    |               |           |         |      |        |
| THE          |               |           |         |      |        |
| ELECTRONIC   |               |           |         |      |        |
|              |               |           |         |      |        |
| CIRCUITS     |               |           |         |      |        |
| GENERATE     |               |           |         |      |        |
| DISCRETE     |               |           |         |      |        |
| ELECTRICAL   |               |           |         |      |        |
| SIGNALS      |               |           |         |      |        |
| REQUIRED FOR |               |           |         |      |        |
| CONTROL AND  |               |           |         |      |        |
|              |               |           |         |      |        |
| MONITORING   |               |           |         |      |        |
| OF           |               |           |         |      |        |
| PROPELLANT   |               |           |         |      |        |
| LOADING AND  |               |           |         |      |        |
| DRAINING,    |               |           |         |      |        |
| FOR          |               |           |         |      |        |
| TELEMETRY,   |               |           |         |      |        |
| AND FOR      |               |           |         |      |        |
|              |               |           |         |      |        |
| SHUTDOWN OF  |               |           |         |      |        |
| THE MAIN     |               |           |         |      |        |
| ENGINES UPON |               |           |         |      |        |
| DEPLETION OF |               |           |         |      |        |
| LH2.         |               |           |         |      |        |
|              |               |           |         |      |        |
| THE SENSOR   |               |           |         |      |        |
| HAS AN       |               |           |         |      |        |
| ALUMINUM     |               |           |         |      |        |
| CASE, WHICH  |               |           |         |      |        |
| IS PRODUCED  |               |           |         |      |        |
| BY           |               |           |         |      |        |
| INVESTMENT   |               |           |         |      |        |
|              |               |           |         |      |        |
| CASTING.     |               |           |         |      |        |
| VERY FEW OF  |               |           |         |      |        |
| THE INTERNAL |               |           |         |      |        |
| SURFACES,    |               |           |         |      |        |
| AND NONE OF  |               |           |         |      |        |
| THE          |               |           |         |      |        |
|              |               |           |         |      |        |
| EXTERNAL     |               |           |         |      |        |
| SURFACES,    |               |           |         |      |        |
| ARE FINISH   |               |           |         |      |        |
| MACHINED FOR |               |           |         |      |        |
| DIMENSIONAL  |               |           |         |      |        |
| CONTROL. THE |               |           |         |      |        |
|              |               |           |         |      |        |
| INTERNAL     |               |           |         |      |        |
| SURFACES OF  |               |           |         |      |        |
| THE CASE AND |               |           |         |      |        |
| THE COVER    |               |           |         |      |        |
| ARE PAINTED  |               |           |         |      |        |
| WITH A       |               |           |         |      |        |
| SPRAYED-     |               |           |         |      |        |
|              |               |           |         |      |        |
| ON, BAKED,   |               |           |         |      |        |
| TEFLON(R)    |               |           |         |      |        |
| PAINT. THE   |               |           |         |      |        |
| PAINT        |               |           |         |      |        |
| PREVENTS     |               |           |         |      |        |
| WETTING OF   |               |           |         |      |        |
| THE CASE,    |               |           |         |      |        |
|              |               |           |         |      |        |
| I.E.         |               |           |         |      |        |
| RETENTION OF |               |           |         |      |        |
| CRYOGENIC    |               |           |         |      |        |
| FLUIDS, AND  |               |           |         |      |        |
| ALSO         |               |           |         |      |        |
| PROVIDES     |               |           |         |      |        |
| SOME         |               |           |         |      |        |
| ELECTRICAL   |               |           |         |      |        |
|              |               |           |         |      |        |
| INSULATION   |               |           |         |      |        |
| BETWEEN THE  |               |           |         |      |        |
| CASE AND THE |               |           |         |      |        |
| SENSOR       |               |           |         |      |        |
| ELEMENT. THE |               |           |         |      |        |
| ELEMENT IS   |               |           |         |      |        |
|              |               |           |         |      |        |
| SUPPORTED BY |               |           |         |      |        |
| A CERAMIC    |               |           |         |      |        |
| SUBSTRATE.   |               |           |         |      |        |
| THE          |               |           |         |      |        |
| SUBSTRATE    |               |           |         |      |        |
| HAS FIRED-ON |               |           |         |      |        |
| GOLD         |               |           |         |      |        |
|              |               |           |         |      |        |
| CIRCUIT      |               |           |         |      |        |
| PATHS WHICH  |               |           |         |      |        |
| PROVIDE A    |               |           |         |      |        |
| MEANS TO     |               |           |         |      |        |
| TERMINATE    |               |           |         |      |        |
| THE ELEMENT  |               |           |         |      |        |
| WIRE BY      |               |           |         |      |        |
|              |               |           |         |      |        |
| WELDING. THE |               |           |         |      |        |
| SENSOR       |               |           |         |      |        |
| OUTPUT WIRES |               |           |         |      |        |
| ARE ATTACHED |               |           |         |      |        |
| TO THE       |               |           |         |      |        |
| SUBSTRATE BY |               |           |         |      |        |
|              |               |           |         |      |        |
| STEEL        |               |           |         |      |        |
| TERMINALS    |               |           |         |      |        |
| HELD IN      |               |           |         |      |        |
| PLACE WITH   |               |           |         |      |        |
| RIVETS AND   |               |           |         |      |        |
| SPRING       |               |           |         |      |        |
| WASHERS.     |               |           |         |      |        |
|              |               |           |         |      |        |
| BACKGROUND   |               |           |         |      |        |
|              |               |           |         |      |        |
| \-\-\-\      |               |           |         |      |        |
| -\-\-\-\-\-- |               |           |         |      |        |
|              |               |           |         |      |        |
| THE 74L4-2   |               |           |         |      |        |
| LH2 LEVEL    |               |           |         |      |        |
| SENSOR WAS   |               |           |         |      |        |
| UNDERGOING   |               |           |         |      |        |
| ACCEPTANCE   |               |           |         |      |        |
| TESTING AT   |               |           |         |      |        |
| THE          |               |           |         |      |        |
|              |               |           |         |      |        |
| SUPPLIER,    |               |           |         |      |        |
| GOODRICH     |               |           |         |      |        |
| CORPORATION, |               |           |         |      |        |
| SIMMONDS     |               |           |         |      |        |
| PRECISION    |               |           |         |      |        |
| DIVISION, IN |               |           |         |      |        |
|              |               |           |         |      |        |
| VERGENNES,   |               |           |         |      |        |
| VERMONT. THE |               |           |         |      |        |
| TESTING IS   |               |           |         |      |        |
| CONTROLLED   |               |           |         |      |        |
| BY           |               |           |         |      |        |
| ACCEPTANCE   |               |           |         |      |        |
| TEST PLAN    |               |           |         |      |        |
|              |               |           |         |      |        |
| 946 REVISION |               |           |         |      |        |
| AB,          |               |           |         |      |        |
| PARAGRAPH    |               |           |         |      |        |
| 6.2. THE     |               |           |         |      |        |
| DIELECTRIC   |               |           |         |      |        |
| WITHSTAND    |               |           |         |      |        |
| VOLTAGE TEST |               |           |         |      |        |
|              |               |           |         |      |        |
| REQUIRES THE |               |           |         |      |        |
| APPLICATION  |               |           |         |      |        |
| OF 60HZ, 500 |               |           |         |      |        |
| VOLTS RMS    |               |           |         |      |        |
| FOR 60       |               |           |         |      |        |
| SECONDS.     |               |           |         |      |        |
| THERE        |               |           |         |      |        |
|              |               |           |         |      |        |
| SHALL BE NO  |               |           |         |      |        |
| ARC-OVER OR  |               |           |         |      |        |
| LEAKAGE      |               |           |         |      |        |
| GREATER THAN |               |           |         |      |        |
| 1.8          |               |           |         |      |        |
| MILLIAMPS.   |               |           |         |      |        |
| MULTIPLE     |               |           |         |      |        |
|              |               |           |         |      |        |
| SENSORS ARE  |               |           |         |      |        |
| SUBSEQUENTLY |               |           |         |      |        |
| TESTED IN    |               |           |         |      |        |
| PARALLEL.    |               |           |         |      |        |
| INITIAL      |               |           |         |      |        |
| TESTING      |               |           |         |      |        |
|              |               |           |         |      |        |
| ESTABLISHED  |               |           |         |      |        |
| A MEASURED   |               |           |         |      |        |
| LEAKAGE      |               |           |         |      |        |
| CURRENT OF   |               |           |         |      |        |
| 2.9          |               |           |         |      |        |
| MILLIAMPS ON |               |           |         |      |        |
| THE FAILED   |               |           |         |      |        |
|              |               |           |         |      |        |
| SENSOR. THE  |               |           |         |      |        |
| SENSOR WAS   |               |           |         |      |        |
| ELECTRICALLY |               |           |         |      |        |
| ISOLATED     |               |           |         |      |        |
| FROM THE     |               |           |         |      |        |
| OTHER        |               |           |         |      |        |
| SENSORS      |               |           |         |      |        |
|              |               |           |         |      |        |
| (BUT NOT     |               |           |         |      |        |
| PHYSICALLY   |               |           |         |      |        |
| MOVED) AND   |               |           |         |      |        |
| RETESTED.    |               |           |         |      |        |
| THE LEAKAGE  |               |           |         |      |        |
| CURRENT OF   |               |           |         |      |        |
| THE          |               |           |         |      |        |
|              |               |           |         |      |        |
| SENSOR UPON  |               |           |         |      |        |
| RETEST WAS   |               |           |         |      |        |
| WAVERING     |               |           |         |      |        |
| BETWEEN      |               |           |         |      |        |
| .024-.026    |               |           |         |      |        |
| MILLIAMPS.   |               |           |         |      |        |
| THE SENSOR   |               |           |         |      |        |
|              |               |           |         |      |        |
| LEAD WIRE    |               |           |         |      |        |
| INSULATION   |               |           |         |      |        |
| WAS          |               |           |         |      |        |
| INSPECTED    |               |           |         |      |        |
| AND NO       |               |           |         |      |        |
| DAMAGE OR    |               |           |         |      |        |
| ANOMALIES    |               |           |         |      |        |
| WERE         |               |           |         |      |        |
|              |               |           |         |      |        |
| NOTED.       |               |           |         |      |        |
| LEAKAGE      |               |           |         |      |        |
| CURRENT WAS  |               |           |         |      |        |
| AGAIN        |               |           |         |      |        |
| MEASURED     |               |           |         |      |        |
| UNDER THE    |               |           |         |      |        |
| APPLIED LOAD |               |           |         |      |        |
| AND          |               |           |         |      |        |
|              |               |           |         |      |        |
| THE WAVERING |               |           |         |      |        |
| VALUE OF     |               |           |         |      |        |
| .024-.026    |               |           |         |      |        |
| MILLIAMPS    |               |           |         |      |        |
| WAS          |               |           |         |      |        |
| REPEATED.    |               |           |         |      |        |
| THIS         |               |           |         |      |        |
|              |               |           |         |      |        |
| NO           |               |           |         |      |        |
| NCONFORMANCE |               |           |         |      |        |
| HAS BEEN     |               |           |         |      |        |
| DOCUMENTED   |               |           |         |      |        |
| ON NCD       |               |           |         |      |        |
| NUMBER       |               |           |         |      |        |
| N052304.     |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK I       |               |           |         |      |        |
| FAI          |               |           |         |      |        |
| LURE/PROBLEM |               |           |         |      |        |
| I            |               |           |         |      |        |
| NVESTIGATION |               |           |         |      |        |
|              |               |           |         |      |        |
| \-\-\-\-\    |               |           |         |      |        |
| -\-\-\-\-\-\ |               |           |         |      |        |
| -\-\-\-\-\-\ |               |           |         |      |        |
| -\-\-\-\-\-\ |               |           |         |      |        |
| -\-\-\-\-\-- |               |           |         |      |        |
|              |               |           |         |      |        |
| A. THE       |               |           |         |      |        |
| FAILED       |               |           |         |      |        |
| SENSOR, S/N  |               |           |         |      |        |
| 0003354, WAS |               |           |         |      |        |
| DOCUMENTED   |               |           |         |      |        |
| ON NCD       |               |           |         |      |        |
|              |               |           |         |      |        |
| N052304. THE |               |           |         |      |        |
| NCD          |               |           |         |      |        |
| DISPOSITION  |               |           |         |      |        |
| DIRECTS A    |               |           |         |      |        |
| FAILURE      |               |           |         |      |        |
| ANALYSIS TO  |               |           |         |      |        |
|              |               |           |         |      |        |
| BE PERFORMED |               |           |         |      |        |
| AT THE       |               |           |         |      |        |
| SUPPLIER.    |               |           |         |      |        |
|              |               |           |         |      |        |
| RES          |               |           |         |      |        |
| PONSIBILITY: |               |           |         |      |        |
| J. HILL,     |               |           |         |      |        |
| DEPT.        |               |           |         |      |        |
| 3977/S.      |               |           |         |      |        |
| PARIKH,      |               |           |         |      |        |
| DEPT. 3760   |               |           |         |      |        |
|              |               |           |         |      |        |
| M. PENO,     |               |           |         |      |        |
| DEPT. 3741 / |               |           |         |      |        |
| D. WESTPHAL, |               |           |         |      |        |
| DEPT. 3740   |               |           |         |      |        |
|              |               |           |         |      |        |
| ECD:         |               |           |         |      |        |
| 12/20/02     |               |           |         |      |        |
|              |               |           |         |      |        |
| B. DOCUMENT  |               |           |         |      |        |
| ANY FAILURES |               |           |         |      |        |
| OF THIS TYPE |               |           |         |      |        |
| THAT HAVE    |               |           |         |      |        |
| OCCURRED     |               |           |         |      |        |
| PRE-         |               |           |         |      |        |
|              |               |           |         |      |        |
| ATP. IF      |               |           |         |      |        |
| FAILURES     |               |           |         |      |        |
| OCCURRED     |               |           |         |      |        |
| PRE-ATP, HOW |               |           |         |      |        |
| WERE THEY    |               |           |         |      |        |
|              |               |           |         |      |        |
| D            |               |           |         |      |        |
| ISPOSITIONED |               |           |         |      |        |
| AND WHAT     |               |           |         |      |        |
| WERE THE     |               |           |         |      |        |
| S/N(S) OF    |               |           |         |      |        |
| THE SENSORS. |               |           |         |      |        |
|              |               |           |         |      |        |
| RES          |               |           |         |      |        |
| PONSIBILITY: |               |           |         |      |        |
| J. HILL,     |               |           |         |      |        |
| DEPT. 3977 / |               |           |         |      |        |
| S. PARIKH,   |               |           |         |      |        |
| DEPT. 3760   |               |           |         |      |        |
|              |               |           |         |      |        |
| ECD:         |               |           |         |      |        |
| 11/25/02     |               |           |         |      |        |
|              |               |           |         |      |        |
| COMPLETE:    |               |           |         |      |        |
| 11/20/02     |               |           |         |      |        |
|              |               |           |         |      |        |
| CLOSURE      |               |           |         |      |        |
| STATEMENT:   |               |           |         |      |        |
|              |               |           |         |      |        |
| \-\-\-\-\-\  |               |           |         |      |        |
| -\-\-\-\-\-\ |               |           |         |      |        |
| -\-\-\-\-\-- |               |           |         |      |        |
|              |               |           |         |      |        |
| LO2 SENSOR   |               |           |         |      |        |
| 74L4-1, S/N  |               |           |         |      |        |
| 0002832      |               |           |         |      |        |
| FAILED       |               |           |         |      |        |
| PRE-ATP 946  |               |           |         |      |        |
| DIELECTRIC   |               |           |         |      |        |
|              |               |           |         |      |        |
| WITHSTAND    |               |           |         |      |        |
| VOLTAGE TEST |               |           |         |      |        |
| ON 10-24-02. |               |           |         |      |        |
| PRIOR TO     |               |           |         |      |        |
| REMOVAL OF   |               |           |         |      |        |
| THE          |               |           |         |      |        |
|              |               |           |         |      |        |
| COVER, THE   |               |           |         |      |        |
| CLEAR TFE    |               |           |         |      |        |
| TEFLON(      |               |           |         |      |        |
| R)INSULATING |               |           |         |      |        |
| SLEEVING     |               |           |         |      |        |
| APPEARED TO  |               |           |         |      |        |
|              |               |           |         |      |        |
| BE PINCHED   |               |           |         |      |        |
| BETWEEN THE  |               |           |         |      |        |
| HOUSING AND  |               |           |         |      |        |
| THE COVER.   |               |           |         |      |        |
| AFTER        |               |           |         |      |        |
| REMOVAL OF   |               |           |         |      |        |
|              |               |           |         |      |        |
| THE COVER IT |               |           |         |      |        |
| WAS          |               |           |         |      |        |
| CONFIRMED    |               |           |         |      |        |
| THAT THE     |               |           |         |      |        |
| SLEEVING WAS |               |           |         |      |        |
| PINCHED,     |               |           |         |      |        |
|              |               |           |         |      |        |
| LEAVING THE  |               |           |         |      |        |
| WIRE IN      |               |           |         |      |        |
| CLOSE        |               |           |         |      |        |
| PROXIMITY    |               |           |         |      |        |
| WITH THE     |               |           |         |      |        |
| EDGE OF THE  |               |           |         |      |        |
|              |               |           |         |      |        |
| HOUSING. THE |               |           |         |      |        |
| COVER WAS    |               |           |         |      |        |
| REMOVED FROM |               |           |         |      |        |
| THE HOUSING  |               |           |         |      |        |
| TO PERFORM   |               |           |         |      |        |
| THE          |               |           |         |      |        |
|              |               |           |         |      |        |
| FAILURE      |               |           |         |      |        |
| IN           |               |           |         |      |        |
| VESTIGATION. |               |           |         |      |        |
| THE LEAD     |               |           |         |      |        |
| W            |               |           |         |      |        |
| IRE/TERMINAL |               |           |         |      |        |
| WAS          |               |           |         |      |        |
| STRAIGHTENED |               |           |         |      |        |
|              |               |           |         |      |        |
| TO ALLOW THE |               |           |         |      |        |
| WIRE TO EXIT |               |           |         |      |        |
| THROUGH THE  |               |           |         |      |        |
| CHANNEL      |               |           |         |      |        |
| STRAIGHT AND |               |           |         |      |        |
| NOT          |               |           |         |      |        |
|              |               |           |         |      |        |
| AT AN ANGLE. |               |           |         |      |        |
| THE PINCHED  |               |           |         |      |        |
| INSULATING   |               |           |         |      |        |
| SLEEVING WAS |               |           |         |      |        |
| THEN         |               |           |         |      |        |
| REPLACED     |               |           |         |      |        |
|              |               |           |         |      |        |
| ON THE       |               |           |         |      |        |
| EFFECTED     |               |           |         |      |        |
| LEAD WIRE.   |               |           |         |      |        |
| THE COVER    |               |           |         |      |        |
| WAS          |               |           |         |      |        |
| REINSTALLED, |               |           |         |      |        |
| AND          |               |           |         |      |        |
|              |               |           |         |      |        |
| ATTACHMENT   |               |           |         |      |        |
| SCREWS WERE  |               |           |         |      |        |
| TORQUED TO   |               |           |         |      |        |
| 35-38        |               |           |         |      |        |
| INCH-OUNCES. |               |           |         |      |        |
| CAUTION      |               |           |         |      |        |
|              |               |           |         |      |        |
| WAS          |               |           |         |      |        |
| EXERCISED TO |               |           |         |      |        |
| ENSURE THAT  |               |           |         |      |        |
| THE          |               |           |         |      |        |
| INSULATING   |               |           |         |      |        |
| SLEEVING WAS |               |           |         |      |        |
| NOT          |               |           |         |      |        |
|              |               |           |         |      |        |
| PINCHED      |               |           |         |      |        |
| UNDER THE    |               |           |         |      |        |
| COVER OR     |               |           |         |      |        |
| KINKED. THE  |               |           |         |      |        |
| PART WAS     |               |           |         |      |        |
| TESTED PER   |               |           |         |      |        |
| ATP-         |               |           |         |      |        |
|              |               |           |         |      |        |
| 946          |               |           |         |      |        |
| DIELECTRIC   |               |           |         |      |        |
| STRENGTH PER |               |           |         |      |        |
| PARAGRAPH    |               |           |         |      |        |
| 6.2 AND      |               |           |         |      |        |
| PASSED WITH  |               |           |         |      |        |
| A            |               |           |         |      |        |
|              |               |           |         |      |        |
| LEAKAGE      |               |           |         |      |        |
| CURRENT OF   |               |           |         |      |        |
| .028         |               |           |         |      |        |
| MILLIAMPS.   |               |           |         |      |        |
|              |               |           |         |      |        |
| CORRECTIVE   |               |           |         |      |        |
| ACTIONS WERE |               |           |         |      |        |
| IMPLEMENTED  |               |           |         |      |        |
| TO ADD THE   |               |           |         |      |        |
| FOLLOWING    |               |           |         |      |        |
|              |               |           |         |      |        |
| OPERATION    |               |           |         |      |        |
| SPECIFIC     |               |           |         |      |        |
| INST         |               |           |         |      |        |
| RUCTIONS: 1. |               |           |         |      |        |
| WHEN         |               |           |         |      |        |
| INSTALLING   |               |           |         |      |        |
| SENSOR       |               |           |         |      |        |
|              |               |           |         |      |        |
| ELEMENT INTO |               |           |         |      |        |
| HOUSING      |               |           |         |      |        |
| CHECK THAT   |               |           |         |      |        |
| THE SENSOR   |               |           |         |      |        |
| WIRES ARE    |               |           |         |      |        |
| POSITIONED   |               |           |         |      |        |
|              |               |           |         |      |        |
| TOWARDS THE  |               |           |         |      |        |
| CENTER OF    |               |           |         |      |        |
| THE HOUSING  |               |           |         |      |        |
| CHANNEL. 2.  |               |           |         |      |        |
| PRIOR TO     |               |           |         |      |        |
|              |               |           |         |      |        |
| ASSEMBLING   |               |           |         |      |        |
| COVER ON     |               |           |         |      |        |
| HOUSING      |               |           |         |      |        |
| VERIFY THAT  |               |           |         |      |        |
| WIRES ARE    |               |           |         |      |        |
| POSITIONED   |               |           |         |      |        |
|              |               |           |         |      |        |
| TOWARDS THE  |               |           |         |      |        |
| CENTER OF    |               |           |         |      |        |
| THE HOUSING  |               |           |         |      |        |
| CHANNEL.     |               |           |         |      |        |
| (REF. E-MAIL |               |           |         |      |        |
| FROM J.      |               |           |         |      |        |
|              |               |           |         |      |        |
| HILL DATED   |               |           |         |      |        |
| 11/20/02)    |               |           |         |      |        |
|              |               |           |         |      |        |
| CAUSE:       |               |           |         |      |        |
| PENDING      |               |           |         |      |        |
| I            |               |           |         |      |        |
| NVESTIGATION |               |           |         |      |        |
| RESULTS      |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK II      |               |           |         |      |        |
| CORRECTIVE   |               |           |         |      |        |
| ACTION       |               |           |         |      |        |
|              |               |           |         |      |        |
| \-\-\-\-\    |               |           |         |      |        |
| -\-\-\-\-\-\ |               |           |         |      |        |
| -\-\-\-\-\-- |               |           |         |      |        |
|              |               |           |         |      |        |
| PENDING      |               |           |         |      |        |
| COMPLETION   |               |           |         |      |        |
| OF           |               |           |         |      |        |
| IN           |               |           |         |      |        |
| VESTIGATION. |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK III     |               |           |         |      |        |
| CLEARANCE OF |               |           |         |      |        |
| E            |               |           |         |      |        |
| FFECTIVITIES |               |           |         |      |        |
|              |               |           |         |      |        |
| \-\          |               |           |         |      |        |
| -\-\-\-\-\-\ |               |           |         |      |        |
| -\-\-\-\-\-\ |               |           |         |      |        |
| -\-\-\-\-\-\ |               |           |         |      |        |
| -\-\-\-\-\-- |               |           |         |      |        |
|              |               |           |         |      |        |
| FLEET        |               |           |         |      |        |
| CLEARANCE    |               |           |         |      |        |
| FOR ALL      |               |           |         |      |        |
| E            |               |           |         |      |        |
| FFECTIVITIES |               |           |         |      |        |
| IS GRANTED   |               |           |         |      |        |
| BASED ON THE |               |           |         |      |        |
|              |               |           |         |      |        |
| REQUIREMENT  |               |           |         |      |        |
| THAT ALL     |               |           |         |      |        |
| 74L4-2       |               |           |         |      |        |
| CRYOGENIC    |               |           |         |      |        |
| LIQUID LEVEL |               |           |         |      |        |
| SENSORS      |               |           |         |      |        |
|              |               |           |         |      |        |
| PASS THE 500 |               |           |         |      |        |
| VOLTS ATP    |               |           |         |      |        |
| DIELECTRIC   |               |           |         |      |        |
| WITHSTAND    |               |           |         |      |        |
| VOLTAGE      |               |           |         |      |        |
| TEST. IN     |               |           |         |      |        |
|              |               |           |         |      |        |
| ADDITION TO  |               |           |         |      |        |
| THE ATP      |               |           |         |      |        |
| REQUIREMENT, |               |           |         |      |        |
| ALL 74L4-2   |               |           |         |      |        |
| CRYOGENIC    |               |           |         |      |        |
| LIQUID       |               |           |         |      |        |
|              |               |           |         |      |        |
| LEVEL        |               |           |         |      |        |
| SENSORS ARE  |               |           |         |      |        |
| TESTED FOR   |               |           |         |      |        |
| INSULATION   |               |           |         |      |        |
| RESISTANCE   |               |           |         |      |        |
| WITH 50      |               |           |         |      |        |
|              |               |           |         |      |        |
| VOLTS AT     |               |           |         |      |        |
| MAF.         |               |           |         |      |        |
| FURTHERMORE, |               |           |         |      |        |
| THOSE        |               |           |         |      |        |
| SENSORS USED |               |           |         |      |        |
| IN LH2       |               |           |         |      |        |
| DEPLETION    |               |           |         |      |        |
|              |               |           |         |      |        |
| SENSOR       |               |           |         |      |        |
| (CRITICALITY |               |           |         |      |        |
| 1R)          |               |           |         |      |        |
| APPLICATIONS |               |           |         |      |        |
| ARE TESTED   |               |           |         |      |        |
| WITH 50      |               |           |         |      |        |
| VOLTS        |               |           |         |      |        |
|              |               |           |         |      |        |
| FOR          |               |           |         |      |        |
| INSULATION   |               |           |         |      |        |
| RESISTANCE   |               |           |         |      |        |
| AT KSC.      |               |           |         |      |        |
| (REFERENCE   |               |           |         |      |        |
| E-MAIL FROM  |               |           |         |      |        |
|              |               |           |         |      |        |
| A. GRECONIA  |               |           |         |      |        |
| DATED        |               |           |         |      |        |
| 11/20/02)    |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK CLOSED  |               |           |         |      |        |
|              |               |           |         |      |        |
| \-\-\-\-\    |               |           |         |      |        |
| -\-\-\-\-\-- |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK IV CAPS |               |           |         |      |        |
| CLOSURE      |               |           |         |      |        |
| SUMMARY      |               |           |         |      |        |
|              |               |           |         |      |        |
| \-\          |               |           |         |      |        |
| -\-\-\-\-\-\ |               |           |         |      |        |
| -\-\-\-\-\-\ |               |           |         |      |        |
| -\-\-\-\-\-- |               |           |         |      |        |
|              |               |           |         |      |        |
| PENDING      |               |           |         |      |        |
| COMPLETION   |               |           |         |      |        |
| OF           |               |           |         |      |        |
| IN           |               |           |         |      |        |
| VESTIGATION. |               |           |         |      |        |
|              |               |           |         |      |        |
| 1/13/2003 -  |               |           |         |      |        |
| CONTRACTOR   |               |           |         |      |        |
| SUBMITTED    |               |           |         |      |        |
| FULL CLOSURE |               |           |         |      |        |
| REQUEST AS   |               |           |         |      |        |
| FOLLOWS:     |               |           |         |      |        |
|              |               |           |         |      |        |
| GENERAL:     |               |           |         |      |        |
|              |               |           |         |      |        |
| \-\          |               |           |         |      |        |
| -\-\-\-\-\-- |               |           |         |      |        |
|              |               |           |         |      |        |
| TWELVE       |               |           |         |      |        |
| 74L4-2       |               |           |         |      |        |
| SENSORS ARE  |               |           |         |      |        |
| USED IN THE  |               |           |         |      |        |
| LH2 TANK TO  |               |           |         |      |        |
| MONITOR      |               |           |         |      |        |
| DISCRETE     |               |           |         |      |        |
|              |               |           |         |      |        |
| LEVELS OF    |               |           |         |      |        |
| LH2. WHEN    |               |           |         |      |        |
| THE SENSOR   |               |           |         |      |        |
| IS IMMERSED  |               |           |         |      |        |
| IN THE       |               |           |         |      |        |
| LIQUID       |               |           |         |      |        |
| PROPELLANT   |               |           |         |      |        |
|              |               |           |         |      |        |
| (WET) THE    |               |           |         |      |        |
| SIGNAL       |               |           |         |      |        |
| VOLTAGE FROM |               |           |         |      |        |
| THE          |               |           |         |      |        |
| ELECTRONICS  |               |           |         |      |        |
| SHALL BE     |               |           |         |      |        |
| ZERO. WHEN   |               |           |         |      |        |
| THE          |               |           |         |      |        |
|              |               |           |         |      |        |
| SENSOR IS    |               |           |         |      |        |
| FREE OF THE  |               |           |         |      |        |
| LIQUID (DRY) |               |           |         |      |        |
| THE SIGNAL   |               |           |         |      |        |
| VOLTAGE FROM |               |           |         |      |        |
| THE          |               |           |         |      |        |
|              |               |           |         |      |        |
| ELECTRONICS  |               |           |         |      |        |
| SHALL BE 28  |               |           |         |      |        |
| VOLTS DC.    |               |           |         |      |        |
| THE LEVEL    |               |           |         |      |        |
| SENSOR       |               |           |         |      |        |
| UTILIZES THE |               |           |         |      |        |
|              |               |           |         |      |        |
| DECREASE IN  |               |           |         |      |        |
| THE          |               |           |         |      |        |
| ELECTRICAL   |               |           |         |      |        |
| RESISTANCE   |               |           |         |      |        |
| OF A METAL   |               |           |         |      |        |
| WHEN COOLED  |               |           |         |      |        |
| TO DETECT    |               |           |         |      |        |
|              |               |           |         |      |        |
| THE PRESENCE |               |           |         |      |        |
| OF A         |               |           |         |      |        |
| CRYOGENIC    |               |           |         |      |        |
| FLUID. THE   |               |           |         |      |        |
| SENSOR USES  |               |           |         |      |        |
| A GOLD       |               |           |         |      |        |
| FLASHED      |               |           |         |      |        |
|              |               |           |         |      |        |
| PLATINUM     |               |           |         |      |        |
| WIRE, .0005  |               |           |         |      |        |
| INCH IN      |               |           |         |      |        |
| DIAMETER, AS |               |           |         |      |        |
| THE SENSING  |               |           |         |      |        |
| ELEMENT. THE |               |           |         |      |        |
|              |               |           |         |      |        |
| LEVEL SENSOR |               |           |         |      |        |
| SIGNAL       |               |           |         |      |        |
| CONDITIONER, |               |           |         |      |        |
| WHICH IS     |               |           |         |      |        |
| MOUNTED IN   |               |           |         |      |        |
| THE ORBITER, |               |           |         |      |        |
|              |               |           |         |      |        |
| PROVIDES A   |               |           |         |      |        |
| CONSTANT     |               |           |         |      |        |
| CURRENT TO   |               |           |         |      |        |
| THE SENSING  |               |           |         |      |        |
| ELEMENT,     |               |           |         |      |        |
| WHICH CAUSES |               |           |         |      |        |
| IT TO        |               |           |         |      |        |
|              |               |           |         |      |        |
| RISE IN      |               |           |         |      |        |
| TEMPERATURE. |               |           |         |      |        |
| THE          |               |           |         |      |        |
| TEMPERATURE  |               |           |         |      |        |
| AND          |               |           |         |      |        |
| RESISTANCE   |               |           |         |      |        |
| OF THE       |               |           |         |      |        |
| ELEMENT      |               |           |         |      |        |
|              |               |           |         |      |        |
| DECREASE     |               |           |         |      |        |
| RADICALLY    |               |           |         |      |        |
| WHEN         |               |           |         |      |        |
| IMMERSED IN  |               |           |         |      |        |
| A CRYOGENIC  |               |           |         |      |        |
| LIQUID. THE  |               |           |         |      |        |
| SIGNAL       |               |           |         |      |        |
|              |               |           |         |      |        |
| CONDITIONER  |               |           |         |      |        |
| DETECTS THE  |               |           |         |      |        |
| DECREASE IN  |               |           |         |      |        |
| RESISTANCE   |               |           |         |      |        |
| AND CONVERTS |               |           |         |      |        |
| IT TO        |               |           |         |      |        |
|              |               |           |         |      |        |
| A \"WET\"    |               |           |         |      |        |
| OUTPUT       |               |           |         |      |        |
| SIGNAL. THE  |               |           |         |      |        |
| SIGNAL       |               |           |         |      |        |
| CONDITIONER  |               |           |         |      |        |
| IS ALSO      |               |           |         |      |        |
| DESIGNED TO  |               |           |         |      |        |
| GIVE         |               |           |         |      |        |
|              |               |           |         |      |        |
| A \"WET\"    |               |           |         |      |        |
| SIGNAL IN    |               |           |         |      |        |
| THE EVENT OF |               |           |         |      |        |
| AN OPEN      |               |           |         |      |        |
| CIRCUIT IN   |               |           |         |      |        |
| THE LEVEL    |               |           |         |      |        |
| SENSOR.      |               |           |         |      |        |
|              |               |           |         |      |        |
| BASED ON THE |               |           |         |      |        |
| VOLTAGE      |               |           |         |      |        |
| ACROSS THE   |               |           |         |      |        |
| SENSING      |               |           |         |      |        |
| ELEMENTS,    |               |           |         |      |        |
| THE          |               |           |         |      |        |
| ELECTRONIC   |               |           |         |      |        |
|              |               |           |         |      |        |
| CIRCUITS     |               |           |         |      |        |
| GENERATE     |               |           |         |      |        |
| DISCRETE     |               |           |         |      |        |
| ELECTRICAL   |               |           |         |      |        |
| SIGNALS      |               |           |         |      |        |
| REQUIRED FOR |               |           |         |      |        |
| CONTROL AND  |               |           |         |      |        |
|              |               |           |         |      |        |
| MONITORING   |               |           |         |      |        |
| OF           |               |           |         |      |        |
| PROPELLANT   |               |           |         |      |        |
| LOADING AND  |               |           |         |      |        |
| DRAINING,    |               |           |         |      |        |
| FOR          |               |           |         |      |        |
| TELEMETRY,   |               |           |         |      |        |
| AND FOR      |               |           |         |      |        |
|              |               |           |         |      |        |
| SHUTDOWN OF  |               |           |         |      |        |
| THE MAIN     |               |           |         |      |        |
| ENGINES UPON |               |           |         |      |        |
| DEPLETION OF |               |           |         |      |        |
| LH2.         |               |           |         |      |        |
|              |               |           |         |      |        |
| THE SENSOR   |               |           |         |      |        |
| HAS AN       |               |           |         |      |        |
| ALUMINUM     |               |           |         |      |        |
| CASE, WHICH  |               |           |         |      |        |
| IS PRODUCED  |               |           |         |      |        |
| BY           |               |           |         |      |        |
| INVESTMENT   |               |           |         |      |        |
|              |               |           |         |      |        |
| CASTING.     |               |           |         |      |        |
| VERY FEW OF  |               |           |         |      |        |
| THE INTERNAL |               |           |         |      |        |
| SURFACES,    |               |           |         |      |        |
| AND NONE OF  |               |           |         |      |        |
| THE EXTERNAL |               |           |         |      |        |
|              |               |           |         |      |        |
| SURFACES,    |               |           |         |      |        |
| ARE FINISH   |               |           |         |      |        |
| MACHINED FOR |               |           |         |      |        |
| DIMENSIONAL  |               |           |         |      |        |
| CONTROL. THE |               |           |         |      |        |
| INTERNAL     |               |           |         |      |        |
|              |               |           |         |      |        |
| SURFACES OF  |               |           |         |      |        |
| THE CASE AND |               |           |         |      |        |
| THE COVER    |               |           |         |      |        |
| ARE PAINTED  |               |           |         |      |        |
| WITH A       |               |           |         |      |        |
| SPRAYED-ON,  |               |           |         |      |        |
|              |               |           |         |      |        |
| BAKED,       |               |           |         |      |        |
| TEFLON\*     |               |           |         |      |        |
| PAINT. THE   |               |           |         |      |        |
| PAINT        |               |           |         |      |        |
| PREVENTS     |               |           |         |      |        |
| WETTING OF   |               |           |         |      |        |
| THE CASE,    |               |           |         |      |        |
| I.E.         |               |           |         |      |        |
|              |               |           |         |      |        |
| RETENTION OF |               |           |         |      |        |
| CRYOGENIC    |               |           |         |      |        |
| FLUIDS, AND  |               |           |         |      |        |
| ALSO         |               |           |         |      |        |
| PROVIDES     |               |           |         |      |        |
| SOME         |               |           |         |      |        |
| ELECTRICAL   |               |           |         |      |        |
|              |               |           |         |      |        |
| INSULATION   |               |           |         |      |        |
| BETWEEN THE  |               |           |         |      |        |
| CASE AND THE |               |           |         |      |        |
| SENSOR       |               |           |         |      |        |
| ELEMENT. THE |               |           |         |      |        |
| ELEMENT IS   |               |           |         |      |        |
|              |               |           |         |      |        |
| SUPPORTED BY |               |           |         |      |        |
| A CERAMIC    |               |           |         |      |        |
| SUBSTRATE.   |               |           |         |      |        |
| THE          |               |           |         |      |        |
| SUBSTRATE    |               |           |         |      |        |
| HAS FIRED-ON |               |           |         |      |        |
| GOLD         |               |           |         |      |        |
|              |               |           |         |      |        |
| CIRCUIT      |               |           |         |      |        |
| PATHS WHICH  |               |           |         |      |        |
| PROVIDE A    |               |           |         |      |        |
| MEANS TO     |               |           |         |      |        |
| TERMINATE    |               |           |         |      |        |
| THE ELEMENT  |               |           |         |      |        |
| WIRE BY      |               |           |         |      |        |
|              |               |           |         |      |        |
| WELDING. THE |               |           |         |      |        |
| SENSOR       |               |           |         |      |        |
| OUTPUT WIRES |               |           |         |      |        |
| ARE ATTACHED |               |           |         |      |        |
| TO THE       |               |           |         |      |        |
| SUBSTRATE BY |               |           |         |      |        |
|              |               |           |         |      |        |
| STEEL        |               |           |         |      |        |
| TERMINALS    |               |           |         |      |        |
| HELD IN      |               |           |         |      |        |
| PLACE WITH   |               |           |         |      |        |
| RIVETS AND   |               |           |         |      |        |
| SPRING       |               |           |         |      |        |
| WASHERS.     |               |           |         |      |        |
|              |               |           |         |      |        |
| \*           |               |           |         |      |        |
| BACKGROUND   |               |           |         |      |        |
|              |               |           |         |      |        |
| \-\-\-\      |               |           |         |      |        |
| -\-\-\-\-\-- |               |           |         |      |        |
|              |               |           |         |      |        |
| THE 74L4-2   |               |           |         |      |        |
| LH2 LEVEL    |               |           |         |      |        |
| SENSOR WAS   |               |           |         |      |        |
| UNDERGOING   |               |           |         |      |        |
| ACCEPTANCE   |               |           |         |      |        |
| TESTING AT   |               |           |         |      |        |
| THE          |               |           |         |      |        |
|              |               |           |         |      |        |
| SUPPLIER,    |               |           |         |      |        |
| GOODRICH     |               |           |         |      |        |
| CORPORATION, |               |           |         |      |        |
| SIMMONDS     |               |           |         |      |        |
| PRECISION    |               |           |         |      |        |
| DIVISION, IN |               |           |         |      |        |
|              |               |           |         |      |        |
| VERGENNES,   |               |           |         |      |        |
| VERMONT. THE |               |           |         |      |        |
| TESTING IS   |               |           |         |      |        |
| CONTROLLED   |               |           |         |      |        |
| BY           |               |           |         |      |        |
| ACCEPTANCE   |               |           |         |      |        |
| TEST PLAN    |               |           |         |      |        |
|              |               |           |         |      |        |
| 946 REVISION |               |           |         |      |        |
| AB,          |               |           |         |      |        |
| PARAGRAPH    |               |           |         |      |        |
| 6.2. THE     |               |           |         |      |        |
| DIELECTRIC   |               |           |         |      |        |
| WITHSTAND    |               |           |         |      |        |
| VOLTAGE TEST |               |           |         |      |        |
|              |               |           |         |      |        |
| REQUIRES THE |               |           |         |      |        |
| APPLICATION  |               |           |         |      |        |
| OF 60HZ, 500 |               |           |         |      |        |
| VOLTS RMS    |               |           |         |      |        |
| FOR 60       |               |           |         |      |        |
| SECONDS.     |               |           |         |      |        |
| THERE        |               |           |         |      |        |
|              |               |           |         |      |        |
| SHALL BE NO  |               |           |         |      |        |
| ARC-OVER OR  |               |           |         |      |        |
| LEAKAGE      |               |           |         |      |        |
| GREATER THAN |               |           |         |      |        |
| 1.8          |               |           |         |      |        |
| MILLIAMPS.   |               |           |         |      |        |
| INITIAL      |               |           |         |      |        |
|              |               |           |         |      |        |
| TESTING      |               |           |         |      |        |
| ESTABLISHED  |               |           |         |      |        |
| A MEASURED   |               |           |         |      |        |
| REJECTABLE   |               |           |         |      |        |
| LEAKAGE      |               |           |         |      |        |
| CURRENT OF   |               |           |         |      |        |
| 2.9          |               |           |         |      |        |
|              |               |           |         |      |        |
| MILLIAMPS ON |               |           |         |      |        |
| THE FAILED   |               |           |         |      |        |
| SENSOR. THE  |               |           |         |      |        |
| SENSOR WAS   |               |           |         |      |        |
| RETESTED AND |               |           |         |      |        |
| THE LEAKAGE  |               |           |         |      |        |
|              |               |           |         |      |        |
| CURRENT UPON |               |           |         |      |        |
| RETEST WAS   |               |           |         |      |        |
| WAVERING     |               |           |         |      |        |
| BETWEEN      |               |           |         |      |        |
| .024-.026    |               |           |         |      |        |
| MILLIAMPS.   |               |           |         |      |        |
| THE          |               |           |         |      |        |
|              |               |           |         |      |        |
| SENSOR LEAD  |               |           |         |      |        |
| WIRE         |               |           |         |      |        |
| INSULATION   |               |           |         |      |        |
| WAS          |               |           |         |      |        |
| INSPECTED    |               |           |         |      |        |
| AND NO       |               |           |         |      |        |
| DAMAGE OR    |               |           |         |      |        |
| OTHER        |               |           |         |      |        |
|              |               |           |         |      |        |
| ANOMALIES    |               |           |         |      |        |
| WERE NOTED.  |               |           |         |      |        |
| LEAKAGE      |               |           |         |      |        |
| CURRENT WAS  |               |           |         |      |        |
| ONCE AGAIN   |               |           |         |      |        |
| MEASURED     |               |           |         |      |        |
| UNDER THE    |               |           |         |      |        |
|              |               |           |         |      |        |
| APPLIED LOAD |               |           |         |      |        |
| AND THE      |               |           |         |      |        |
| WAVERING     |               |           |         |      |        |
| VALUE OF     |               |           |         |      |        |
| .024-.026    |               |           |         |      |        |
| MILLIAMPS    |               |           |         |      |        |
| WAS          |               |           |         |      |        |
|              |               |           |         |      |        |
| REPEATED.    |               |           |         |      |        |
| THIS         |               |           |         |      |        |
| NO           |               |           |         |      |        |
| NCONFORMANCE |               |           |         |      |        |
| WAS          |               |           |         |      |        |
| DOCUMENTED   |               |           |         |      |        |
| ON NCD       |               |           |         |      |        |
| NUMBER       |               |           |         |      |        |
| N052304.     |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK I       |               |           |         |      |        |
| FAI          |               |           |         |      |        |
| LURE/PROBLEM |               |           |         |      |        |
| I            |               |           |         |      |        |
| NVESTIGATION |               |           |         |      |        |
|              |               |           |         |      |        |
| \-\-\-\-\    |               |           |         |      |        |
| -\-\-\-\-\-\ |               |           |         |      |        |
| -\-\-\-\-\-\ |               |           |         |      |        |
| -\-\-\-\-\-\ |               |           |         |      |        |
| -\-\-\-\-\-- |               |           |         |      |        |
|              |               |           |         |      |        |
| A. THE       |               |           |         |      |        |
| FAILED       |               |           |         |      |        |
| SENSOR, S/N  |               |           |         |      |        |
| 0003354, WAS |               |           |         |      |        |
| DOCUMENTED   |               |           |         |      |        |
| ON NCD       |               |           |         |      |        |
|              |               |           |         |      |        |
| N052304. THE |               |           |         |      |        |
| NCD          |               |           |         |      |        |
| DISPOSITION  |               |           |         |      |        |
| DIRECTED A   |               |           |         |      |        |
| FAILURE      |               |           |         |      |        |
| ANALYSIS TO  |               |           |         |      |        |
|              |               |           |         |      |        |
| BE PERFORMED |               |           |         |      |        |
| AT THE       |               |           |         |      |        |
| SUPPLIER.    |               |           |         |      |        |
|              |               |           |         |      |        |
| RES          |               |           |         |      |        |
| PONSIBILITY: |               |           |         |      |        |
| J. HILL,     |               |           |         |      |        |
| DEPT. 3977 / |               |           |         |      |        |
| S. PARIKH,   |               |           |         |      |        |
| DEPT. 3760   |               |           |         |      |        |
|              |               |           |         |      |        |
| M. PENO,     |               |           |         |      |        |
| DEPT.        |               |           |         |      |        |
| 3741/D.      |               |           |         |      |        |
| WESTPHAL,    |               |           |         |      |        |
| DEPT. 3740   |               |           |         |      |        |
|              |               |           |         |      |        |
| ECD:         |               |           |         |      |        |
| 12/20/02     |               |           |         |      |        |
|              |               |           |         |      |        |
| \* CLOSED:   |               |           |         |      |        |
| 11/25/02     |               |           |         |      |        |
|              |               |           |         |      |        |
| \* CLOSURE   |               |           |         |      |        |
| STATEMENT:   |               |           |         |      |        |
|              |               |           |         |      |        |
| \-\-\-\-\-\  |               |           |         |      |        |
| -\-\-\-\-\-\ |               |           |         |      |        |
| -\-\-\-\-\-- |               |           |         |      |        |
|              |               |           |         |      |        |
| A FAILURE    |               |           |         |      |        |
| ANALYSIS WAS |               |           |         |      |        |
| PERFORMED AT |               |           |         |      |        |
| GOODRICH     |               |           |         |      |        |
| CORPORATION  |               |           |         |      |        |
| TO           |               |           |         |      |        |
|              |               |           |         |      |        |
| DISCERN THE  |               |           |         |      |        |
| CAUSE OF THE |               |           |         |      |        |
| FAILURE.     |               |           |         |      |        |
| PRIOR TO     |               |           |         |      |        |
| DISASSEMBLY, |               |           |         |      |        |
| THE          |               |           |         |      |        |
|              |               |           |         |      |        |
| SENSOR       |               |           |         |      |        |
| LEADWIRE     |               |           |         |      |        |
| ALIGNMENT    |               |           |         |      |        |
| WAS          |               |           |         |      |        |
| INSPECTED    |               |           |         |      |        |
| AND FOUND TO |               |           |         |      |        |
| BE           |               |           |         |      |        |
|              |               |           |         |      |        |
| ACCEPTABLE   |               |           |         |      |        |
| AT THE       |               |           |         |      |        |
| LOCATION     |               |           |         |      |        |
| WHERE THE    |               |           |         |      |        |
| WIRES EXIT   |               |           |         |      |        |
| THE HOUSING  |               |           |         |      |        |
|              |               |           |         |      |        |
| CHANNEL. THE |               |           |         |      |        |
| COVER WAS    |               |           |         |      |        |
| REMOVED AND  |               |           |         |      |        |
| INSPECTED    |               |           |         |      |        |
| FOR          |               |           |         |      |        |
|              |               |           |         |      |        |
| PARTICULATE  |               |           |         |      |        |
| C            |               |           |         |      |        |
| ONTAMINATION |               |           |         |      |        |
| UNDER        |               |           |         |      |        |
| MA           |               |           |         |      |        |
| GNIFICATION. |               |           |         |      |        |
| THE ELEMENT  |               |           |         |      |        |
|              |               |           |         |      |        |
| ASSEMBLY WAS |               |           |         |      |        |
| ALSO         |               |           |         |      |        |
| INSPECTED    |               |           |         |      |        |
| FOR          |               |           |         |      |        |
| C            |               |           |         |      |        |
| ONTAMINATION |               |           |         |      |        |
| PRIOR TO     |               |           |         |      |        |
|              |               |           |         |      |        |
| REMOVAL FROM |               |           |         |      |        |
| THE HOUSING. |               |           |         |      |        |
| NO           |               |           |         |      |        |
| C            |               |           |         |      |        |
| ONTAMINATION |               |           |         |      |        |
| WAS FOUND    |               |           |         |      |        |
| THAT         |               |           |         |      |        |
|              |               |           |         |      |        |
| COULD HAVE   |               |           |         |      |        |
| CAUSED THE   |               |           |         |      |        |
| FAILURE. IT  |               |           |         |      |        |
| WAS ALSO     |               |           |         |      |        |
| NOTED THAT   |               |           |         |      |        |
| THE          |               |           |         |      |        |
|              |               |           |         |      |        |
| SENSOR       |               |           |         |      |        |
| LEADWIRES    |               |           |         |      |        |
| WERE         |               |           |         |      |        |
| PROPERLY     |               |           |         |      |        |
| CENTERED IN  |               |           |         |      |        |
| THE HOUSING  |               |           |         |      |        |
|              |               |           |         |      |        |
| CHANNEL. THE |               |           |         |      |        |
| POSITION OF  |               |           |         |      |        |
| THE SENSOR   |               |           |         |      |        |
| SUBSTRATE    |               |           |         |      |        |
| ASSEMBLY     |               |           |         |      |        |
|              |               |           |         |      |        |
| RELATIVE TO  |               |           |         |      |        |
| THE HOUSING  |               |           |         |      |        |
| WAS NORMAL,  |               |           |         |      |        |
| AND THE GOLD |               |           |         |      |        |
| PINS WERE    |               |           |         |      |        |
|              |               |           |         |      |        |
| NOT          |               |           |         |      |        |
| ABNORMALLY   |               |           |         |      |        |
| CLOSE TO THE |               |           |         |      |        |
| INTERIOR OF  |               |           |         |      |        |
| THE HOUSING. |               |           |         |      |        |
| THE          |               |           |         |      |        |
|              |               |           |         |      |        |
| ELEMENT      |               |           |         |      |        |
| ASSEMBLY WAS |               |           |         |      |        |
| THEN REMOVED |               |           |         |      |        |
| FROM THE     |               |           |         |      |        |
| HOUSING AND  |               |           |         |      |        |
|              |               |           |         |      |        |
| INSPECTED    |               |           |         |      |        |
| UNDER        |               |           |         |      |        |
| M            |               |           |         |      |        |
| AGNIFICATION |               |           |         |      |        |
| FOR PROPER   |               |           |         |      |        |
| INSTALLATION |               |           |         |      |        |
| OF           |               |           |         |      |        |
|              |               |           |         |      |        |
| THE ELEMENT  |               |           |         |      |        |
| COMPONENTS   |               |           |         |      |        |
| AND FOR ANY  |               |           |         |      |        |
| DAMAGE OR    |               |           |         |      |        |
| CO           |               |           |         |      |        |
| NTAMINATION. |               |           |         |      |        |
|              |               |           |         |      |        |
| ARC BURNS    |               |           |         |      |        |
| WERE         |               |           |         |      |        |
| DISCOVERED   |               |           |         |      |        |
| ON THE       |               |           |         |      |        |
| SURFACES OF  |               |           |         |      |        |
| THE GOLD-    |               |           |         |      |        |
|              |               |           |         |      |        |
| FIRED PAD OF |               |           |         |      |        |
| THE SENSING  |               |           |         |      |        |
| ELEMENT AND  |               |           |         |      |        |
| ON THE       |               |           |         |      |        |
| INTERNAL     |               |           |         |      |        |
|              |               |           |         |      |        |
| SURFACE OF   |               |           |         |      |        |
| THE TEFLONR  |               |           |         |      |        |
| COATED CASE. |               |           |         |      |        |
| THERE WAS NO |               |           |         |      |        |
| EVIDENCE     |               |           |         |      |        |
|              |               |           |         |      |        |
| OF ANY       |               |           |         |      |        |
| C            |               |           |         |      |        |
| ONTAMINATION |               |           |         |      |        |
| IN THE AREA  |               |           |         |      |        |
| OF THE BURN  |               |           |         |      |        |
| MARKS. THE   |               |           |         |      |        |
| ARC          |               |           |         |      |        |
|              |               |           |         |      |        |
| BURNS ARE    |               |           |         |      |        |
| EVIDENCE OF, |               |           |         |      |        |
| AND REVEAL   |               |           |         |      |        |
| THE ORIGIN   |               |           |         |      |        |
| OF THE       |               |           |         |      |        |
| CURRENT      |               |           |         |      |        |
|              |               |           |         |      |        |
| LEAKAGE      |               |           |         |      |        |
| FAILURE.     |               |           |         |      |        |
|              |               |           |         |      |        |
| B. DOCUMENT  |               |           |         |      |        |
| ANY FAILURES |               |           |         |      |        |
| OF THIS TYPE |               |           |         |      |        |
| THAT HAVE    |               |           |         |      |        |
| OCCURRED     |               |           |         |      |        |
| PRE-         |               |           |         |      |        |
|              |               |           |         |      |        |
| ATP. IF      |               |           |         |      |        |
| FAILURES     |               |           |         |      |        |
| OCCURRED     |               |           |         |      |        |
| PRE-ATP, HOW |               |           |         |      |        |
| WERE THEY    |               |           |         |      |        |
|              |               |           |         |      |        |
| D            |               |           |         |      |        |
| ISPOSITIONED |               |           |         |      |        |
| AND WHAT     |               |           |         |      |        |
| WERE THE     |               |           |         |      |        |
| S/N(S) OF    |               |           |         |      |        |
| THE SENSORS. |               |           |         |      |        |
|              |               |           |         |      |        |
| RES          |               |           |         |      |        |
| PONSIBILITY: |               |           |         |      |        |
| J. HILL,     |               |           |         |      |        |
| DEPT. 3977 / |               |           |         |      |        |
| S. PARIKH,   |               |           |         |      |        |
| DEPT. 3760   |               |           |         |      |        |
|              |               |           |         |      |        |
| ECD:         |               |           |         |      |        |
| 11/25/02     |               |           |         |      |        |
|              |               |           |         |      |        |
| COMPLETE:    |               |           |         |      |        |
| 11/20/02     |               |           |         |      |        |
|              |               |           |         |      |        |
| \* CLOSURE   |               |           |         |      |        |
| STATEMENT:   |               |           |         |      |        |
|              |               |           |         |      |        |
| \-\-\-\-\-\  |               |           |         |      |        |
| -\-\-\-\-\-\ |               |           |         |      |        |
| -\-\-\-\-\-- |               |           |         |      |        |
|              |               |           |         |      |        |
| IN A SIX     |               |           |         |      |        |
| YEAR TIME    |               |           |         |      |        |
| PERIOD, ONLY |               |           |         |      |        |
| ONE 74L4     |               |           |         |      |        |
| SENSOR HAS   |               |           |         |      |        |
| FAILED       |               |           |         |      |        |
|              |               |           |         |      |        |
| PRE-ATP      |               |           |         |      |        |
| DIELECTRIC   |               |           |         |      |        |
| WITHSTAND    |               |           |         |      |        |
| VOLTAGE      |               |           |         |      |        |
| TESTING. LO2 |               |           |         |      |        |
| SENSOR       |               |           |         |      |        |
|              |               |           |         |      |        |
| 74L4-1, S/N  |               |           |         |      |        |
| 0002832      |               |           |         |      |        |
| FAILED       |               |           |         |      |        |
| PRE-ATP      |               |           |         |      |        |
| TESTING ON   |               |           |         |      |        |
| 10-24-02.    |               |           |         |      |        |
|              |               |           |         |      |        |
| I            |               |           |         |      |        |
| NVESTIGATION |               |           |         |      |        |
| REVEALED     |               |           |         |      |        |
| THAT THE     |               |           |         |      |        |
| CLEAR TFE    |               |           |         |      |        |
| TEFLONB      |               |           |         |      |        |
|              |               |           |         |      |        |
| INSULATING   |               |           |         |      |        |
| SLEEVING     |               |           |         |      |        |
| APPEARED TO  |               |           |         |      |        |
| BE PINCHED   |               |           |         |      |        |
| BETWEEN THE  |               |           |         |      |        |
|              |               |           |         |      |        |
| HOUSING AND  |               |           |         |      |        |
| THE COVER.   |               |           |         |      |        |
| AFTER        |               |           |         |      |        |
| REMOVAL OF   |               |           |         |      |        |
| THE COVER IT |               |           |         |      |        |
| WAS          |               |           |         |      |        |
|              |               |           |         |      |        |
| CONFIRMED    |               |           |         |      |        |
| THAT THE     |               |           |         |      |        |
| SLEEVING WAS |               |           |         |      |        |
| PINCHED,     |               |           |         |      |        |
| LEAVING THE  |               |           |         |      |        |
| WIRE         |               |           |         |      |        |
|              |               |           |         |      |        |
| IN CLOSE     |               |           |         |      |        |
| PROXIMITY TO |               |           |         |      |        |
| THE EDGE OF  |               |           |         |      |        |
| THE HOUSING. |               |           |         |      |        |
| THE COVER    |               |           |         |      |        |
|              |               |           |         |      |        |
| WAS REMOVED  |               |           |         |      |        |
| FROM THE     |               |           |         |      |        |
| HOUSING TO   |               |           |         |      |        |
| PERFORM THE  |               |           |         |      |        |
| FAILURE      |               |           |         |      |        |
|              |               |           |         |      |        |
| IN           |               |           |         |      |        |
| VESTIGATION. |               |           |         |      |        |
| THE LEAD     |               |           |         |      |        |
| W            |               |           |         |      |        |
| IRE/TERMINAL |               |           |         |      |        |
| WAS          |               |           |         |      |        |
| STRAIGHTENED |               |           |         |      |        |
| TO           |               |           |         |      |        |
|              |               |           |         |      |        |
| ALLOW THE    |               |           |         |      |        |
| WIRE TO EXIT |               |           |         |      |        |
| THROUGH THE  |               |           |         |      |        |
| CHANNEL      |               |           |         |      |        |
| STRAIGHT AND |               |           |         |      |        |
|              |               |           |         |      |        |
| NOT AT AN    |               |           |         |      |        |
| ANGLE. THE   |               |           |         |      |        |
| PINCHED      |               |           |         |      |        |
| INSULATING   |               |           |         |      |        |
| SLEEVING WAS |               |           |         |      |        |
| THEN         |               |           |         |      |        |
|              |               |           |         |      |        |
| REPLACED ON  |               |           |         |      |        |
| THE EFFECTED |               |           |         |      |        |
| LEAD WIRE.   |               |           |         |      |        |
| THE COVER    |               |           |         |      |        |
| WAS          |               |           |         |      |        |
|              |               |           |         |      |        |
| REINSTALLED, |               |           |         |      |        |
| AND THE      |               |           |         |      |        |
| ATTACHMENT   |               |           |         |      |        |
| SCREWS WERE  |               |           |         |      |        |
| TORQUED TO   |               |           |         |      |        |
| 35-          |               |           |         |      |        |
|              |               |           |         |      |        |
| 38 INCH-     |               |           |         |      |        |
| OUNCES.      |               |           |         |      |        |
| CAUTION WAS  |               |           |         |      |        |
| EXERCISED TO |               |           |         |      |        |
| ENSURE THAT  |               |           |         |      |        |
| THE          |               |           |         |      |        |
|              |               |           |         |      |        |
| INSULATING   |               |           |         |      |        |
| SLEEVING WAS |               |           |         |      |        |
| NOT PINCHED  |               |           |         |      |        |
| OR KINKED    |               |           |         |      |        |
| UNDER THE    |               |           |         |      |        |
|              |               |           |         |      |        |
| COVER. THE   |               |           |         |      |        |
| PART WAS     |               |           |         |      |        |
| RETESTED PER |               |           |         |      |        |
| ATP-946      |               |           |         |      |        |
| DIELECTRIC   |               |           |         |      |        |
|              |               |           |         |      |        |
| STRENGTH PER |               |           |         |      |        |
| PARAGRAPH    |               |           |         |      |        |
| 6.2 AND      |               |           |         |      |        |
| PASSED WITH  |               |           |         |      |        |
| A LEAKAGE    |               |           |         |      |        |
|              |               |           |         |      |        |
| CURRENT OF   |               |           |         |      |        |
| .028         |               |           |         |      |        |
| MILLIAMPS.   |               |           |         |      |        |
|              |               |           |         |      |        |
| CORRECTIVE   |               |           |         |      |        |
| ACTIONS WERE |               |           |         |      |        |
| IMPLEMENTED  |               |           |         |      |        |
| TO ADD THE   |               |           |         |      |        |
| FOLLOWING    |               |           |         |      |        |
|              |               |           |         |      |        |
| OPERATION    |               |           |         |      |        |
| SPECIFIC     |               |           |         |      |        |
| INST         |               |           |         |      |        |
| RUCTIONS: 1. |               |           |         |      |        |
| WHEN         |               |           |         |      |        |
| INSTALLING   |               |           |         |      |        |
| SENSOR       |               |           |         |      |        |
|              |               |           |         |      |        |
| ELEMENT INTO |               |           |         |      |        |
| HOUSING      |               |           |         |      |        |
| CHECK THAT   |               |           |         |      |        |
| THE SENSOR   |               |           |         |      |        |
| WIRES ARE    |               |           |         |      |        |
|              |               |           |         |      |        |
| POSITIONED   |               |           |         |      |        |
| TOWARDS THE  |               |           |         |      |        |
| CENTER OF    |               |           |         |      |        |
| THE HOUSING  |               |           |         |      |        |
| CHANNEL. 2.  |               |           |         |      |        |
|              |               |           |         |      |        |
| PRIOR TO     |               |           |         |      |        |
| ASSEMBLING   |               |           |         |      |        |
| COVER ON     |               |           |         |      |        |
| HOUSING      |               |           |         |      |        |
| VERIFY THAT  |               |           |         |      |        |
| WIRES ARE    |               |           |         |      |        |
|              |               |           |         |      |        |
| POSITIONED   |               |           |         |      |        |
| TOWARDS THE  |               |           |         |      |        |
| CENTER OF    |               |           |         |      |        |
| THE HOUSING  |               |           |         |      |        |
| CHANNEL.     |               |           |         |      |        |
| (REF.        |               |           |         |      |        |
|              |               |           |         |      |        |
| E-MAIL FROM  |               |           |         |      |        |
| J. HILL      |               |           |         |      |        |
| DATED        |               |           |         |      |        |
| 11/20/02)    |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK CLOSED  |               |           |         |      |        |
|              |               |           |         |      |        |
| \-\-\-\-\    |               |           |         |      |        |
| -\-\-\-\-\-- |               |           |         |      |        |
|              |               |           |         |      |        |
| CAUSE:       |               |           |         |      |        |
|              |               |           |         |      |        |
| \-\-\-\-\--  |               |           |         |      |        |
|              |               |           |         |      |        |
| THE ROOT     |               |           |         |      |        |
| CAUSE COULD  |               |           |         |      |        |
| NOT BE       |               |           |         |      |        |
| DETERMINED.  |               |           |         |      |        |
| NO           |               |           |         |      |        |
| MECHANICAL   |               |           |         |      |        |
| DEFECT WAS   |               |           |         |      |        |
| FOUND        |               |           |         |      |        |
|              |               |           |         |      |        |
| IN THE       |               |           |         |      |        |
| SENSOR       |               |           |         |      |        |
| COMPONENTS.  |               |           |         |      |        |
| EVIDENCE OF  |               |           |         |      |        |
| ARCING       |               |           |         |      |        |
| BETWEEN THE  |               |           |         |      |        |
| SENSING      |               |           |         |      |        |
|              |               |           |         |      |        |
| ELEMENT AND  |               |           |         |      |        |
| THE HOUSING  |               |           |         |      |        |
| WAS NOTED    |               |           |         |      |        |
| DURING       |               |           |         |      |        |
| FAILURE      |               |           |         |      |        |
| ANALYSIS.    |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK II      |               |           |         |      |        |
| CORRECTIVE   |               |           |         |      |        |
| ACTION       |               |           |         |      |        |
|              |               |           |         |      |        |
| \-\-\-\-\-\  |               |           |         |      |        |
| -\-\-\-\-\-\ |               |           |         |      |        |
| -\-\-\-\-\-- |               |           |         |      |        |
|              |               |           |         |      |        |
| \* NO        |               |           |         |      |        |
| CORRECTIVE   |               |           |         |      |        |
| ACTION IS    |               |           |         |      |        |
| REQUIRED. A  |               |           |         |      |        |
| LIMITED      |               |           |         |      |        |
| NUMBER OF    |               |           |         |      |        |
|              |               |           |         |      |        |
| ISOLATION    |               |           |         |      |        |
| RESISTANCE   |               |           |         |      |        |
| TEST         |               |           |         |      |        |
| FAILURES CAN |               |           |         |      |        |
| BE EXPECTED  |               |           |         |      |        |
| TO OCCUR     |               |           |         |      |        |
|              |               |           |         |      |        |
| DURING       |               |           |         |      |        |
| SUPPLIER     |               |           |         |      |        |
| TESTING AS A |               |           |         |      |        |
| NATURAL      |               |           |         |      |        |
| RESULT OF    |               |           |         |      |        |
| THE SENSOR   |               |           |         |      |        |
|              |               |           |         |      |        |
| DESIGN. THE  |               |           |         |      |        |
| DESIGN OF    |               |           |         |      |        |
| THE SENSOR   |               |           |         |      |        |
| DOES NOT     |               |           |         |      |        |
| PROVIDE      |               |           |         |      |        |
| POSITIVE     |               |           |         |      |        |
|              |               |           |         |      |        |
| MECHANICAL   |               |           |         |      |        |
| SEPARATION   |               |           |         |      |        |
| BETWEEN THE  |               |           |         |      |        |
| GOLD CIRCUIT |               |           |         |      |        |
| PATH ON THE  |               |           |         |      |        |
|              |               |           |         |      |        |
| INTERNAL     |               |           |         |      |        |
| SENSING      |               |           |         |      |        |
| ELEMENT AND  |               |           |         |      |        |
| THE          |               |           |         |      |        |
| TEFLON(R)    |               |           |         |      |        |
| COATED METAL |               |           |         |      |        |
| CASE.        |               |           |         |      |        |
|              |               |           |         |      |        |
| THESE FACTS  |               |           |         |      |        |
| WERE         |               |           |         |      |        |
| DOCUMENTED   |               |           |         |      |        |
| IN CAPS      |               |           |         |      |        |
| E-100 AND    |               |           |         |      |        |
| CAPS E-138.  |               |           |         |      |        |
|              |               |           |         |      |        |
| THE SUPPLIER |               |           |         |      |        |
| ATP PROVIDES |               |           |         |      |        |
| AN ADEQUATE  |               |           |         |      |        |
| SCREEN FOR   |               |           |         |      |        |
| FAILURES OF  |               |           |         |      |        |
|              |               |           |         |      |        |
| THIS TYPE.   |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK CLOSED  |               |           |         |      |        |
|              |               |           |         |      |        |
| \-\-\-\-\    |               |           |         |      |        |
| -\-\-\-\-\-- |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK III     |               |           |         |      |        |
| CLEARANCE OF |               |           |         |      |        |
| E            |               |           |         |      |        |
| FFECTIVITIES |               |           |         |      |        |
|              |               |           |         |      |        |
| \-\          |               |           |         |      |        |
| -\-\-\-\-\-- |               |           |         |      |        |
|              |               |           |         |      |        |
| \* FLEET     |               |           |         |      |        |
| CLEARANCE    |               |           |         |      |        |
| FOR ALL      |               |           |         |      |        |
| E            |               |           |         |      |        |
| FFECTIVITIES |               |           |         |      |        |
| IS BASED ON  |               |           |         |      |        |
| THE          |               |           |         |      |        |
|              |               |           |         |      |        |
| REQUIREMENT  |               |           |         |      |        |
| THAT ALL     |               |           |         |      |        |
| 74L4         |               |           |         |      |        |
| CRYOGENIC    |               |           |         |      |        |
| LIQUID LEVEL |               |           |         |      |        |
| SENSORS PASS |               |           |         |      |        |
|              |               |           |         |      |        |
| THE 500      |               |           |         |      |        |
| VOLTS ATP    |               |           |         |      |        |
| DIELECTRIC   |               |           |         |      |        |
| WITHSTAND    |               |           |         |      |        |
| VOLTAGE      |               |           |         |      |        |
| TEST. IN     |               |           |         |      |        |
|              |               |           |         |      |        |
| ADDITION TO  |               |           |         |      |        |
| THE ATP      |               |           |         |      |        |
| REQUIREMENT, |               |           |         |      |        |
| ALL 74L4     |               |           |         |      |        |
| CRYOGENIC    |               |           |         |      |        |
| LIQUID       |               |           |         |      |        |
|              |               |           |         |      |        |
| LEVEL        |               |           |         |      |        |
| SENSORS ARE  |               |           |         |      |        |
| TESTED FOR   |               |           |         |      |        |
| INSULATION   |               |           |         |      |        |
| RESISTANCE   |               |           |         |      |        |
| WITH 50      |               |           |         |      |        |
|              |               |           |         |      |        |
| VOLTS AT     |               |           |         |      |        |
| MAF.         |               |           |         |      |        |
| FURTHERMORE, |               |           |         |      |        |
| THOSE        |               |           |         |      |        |
| SENSORS USED |               |           |         |      |        |
| IN LH2       |               |           |         |      |        |
|              |               |           |         |      |        |
| DEPLETION    |               |           |         |      |        |
| SENSOR       |               |           |         |      |        |
| (CRITICALITY |               |           |         |      |        |
| 1R)          |               |           |         |      |        |
| APPLICATIONS |               |           |         |      |        |
| ARE TESTED   |               |           |         |      |        |
|              |               |           |         |      |        |
| WITH 50      |               |           |         |      |        |
| VOLTS FOR    |               |           |         |      |        |
| INSULATION   |               |           |         |      |        |
| RESISTANCE   |               |           |         |      |        |
| AT KSC.      |               |           |         |      |        |
| (REFERENCE   |               |           |         |      |        |
| E-           |               |           |         |      |        |
|              |               |           |         |      |        |
| MAIL FROM A. |               |           |         |      |        |
| GRECONIA     |               |           |         |      |        |
| DATED        |               |           |         |      |        |
| 11/20/02)    |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK CLOSED  |               |           |         |      |        |
|              |               |           |         |      |        |
| \-\-\-\-\    |               |           |         |      |        |
| -\-\-\-\-\-- |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK IV CAPS |               |           |         |      |        |
| CLOSURE      |               |           |         |      |        |
| SUMMARY      |               |           |         |      |        |
|              |               |           |         |      |        |
| \-\          |               |           |         |      |        |
| -\-\-\-\-\-\ |               |           |         |      |        |
| -\-\-\-\-\-\ |               |           |         |      |        |
| -\-\-\-\-\-- |               |           |         |      |        |
|              |               |           |         |      |        |
| \* LIQUID    |               |           |         |      |        |
| LEVEL SENSOR |               |           |         |      |        |
| 74L4-2, S/N  |               |           |         |      |        |
| 0003354      |               |           |         |      |        |
| FAILED       |               |           |         |      |        |
| DIELECTRIC   |               |           |         |      |        |
|              |               |           |         |      |        |
| WITHSTANDING |               |           |         |      |        |
| VOLTAGE TEST |               |           |         |      |        |
| DURING       |               |           |         |      |        |
| SUPPLIER     |               |           |         |      |        |
| ATP. FAILURE |               |           |         |      |        |
|              |               |           |         |      |        |
| ANALYSIS     |               |           |         |      |        |
| VERIFIED THE |               |           |         |      |        |
| SOURCE OF    |               |           |         |      |        |
| THE LEAKAGE  |               |           |         |      |        |
| CURRENT TO   |               |           |         |      |        |
| BE AT        |               |           |         |      |        |
|              |               |           |         |      |        |
| THE GOLD PAD |               |           |         |      |        |
| OF SENSOR    |               |           |         |      |        |
| ELEMENT. ARC |               |           |         |      |        |
| BURNS WERE   |               |           |         |      |        |
| FOUND ON THE |               |           |         |      |        |
|              |               |           |         |      |        |
| SENSING      |               |           |         |      |        |
| ELEMENT AND  |               |           |         |      |        |
| ALSO ON THE  |               |           |         |      |        |
| INTERIOR     |               |           |         |      |        |
| SURFACE OF   |               |           |         |      |        |
| THE          |               |           |         |      |        |
|              |               |           |         |      |        |
| SENSOR       |               |           |         |      |        |
| HOUSING. A   |               |           |         |      |        |
| LIMITED      |               |           |         |      |        |
| NUMBER OF    |               |           |         |      |        |
| SUCH         |               |           |         |      |        |
| FAILURES ARE |               |           |         |      |        |
|              |               |           |         |      |        |
| INHERENT IN  |               |           |         |      |        |
| THE SENSOR   |               |           |         |      |        |
| DESIGN.      |               |           |         |      |        |
| SUPPLIER     |               |           |         |      |        |
| ACCEPTANCE   |               |           |         |      |        |
| TESTING      |               |           |         |      |        |
|              |               |           |         |      |        |
| IS ADEQUATE  |               |           |         |      |        |
| TO SCREEN    |               |           |         |      |        |
| FOR FAILURES |               |           |         |      |        |
| OF THIS      |               |           |         |      |        |
| TYPE. NO     |               |           |         |      |        |
|              |               |           |         |      |        |
| CORRECTIVE   |               |           |         |      |        |
| ACTION IS    |               |           |         |      |        |
| REQUIRED.    |               |           |         |      |        |
| THIS SENSOR  |               |           |         |      |        |
| IS NOT       |               |           |         |      |        |
| ACCEPTABLE   |               |           |         |      |        |
|              |               |           |         |      |        |
| FOR FLIGHT   |               |           |         |      |        |
| AND IS TO BE |               |           |         |      |        |
| SCRAPPED.    |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK CLOSED  |               |           |         |      |        |
|              |               |           |         |      |        |
| \-\-\-\-\    |               |           |         |      |        |
| -\-\-\-\-\-- |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **MSFC       |               |           |         |      |        |
| Response/C   |               |           |         |      |        |
| oncurrence** |               |           |         |      |        |
|              |               |           |         |      |        |
| 11/21/2002 - |               |           |         |      |        |
| MSFC         |               |           |         |      |        |
| APPROVED     |               |           |         |      |        |
| INTERIM      |               |           |         |      |        |
| CLOSURE THRU |               |           |         |      |        |
| 1/31/2003    |               |           |         |      |        |
| BASED ON     |               |           |         |      |        |
| NSTS         |               |           |         |      |        |
|              |               |           |         |      |        |
| 08126, REV.  |               |           |         |      |        |
| H RATIONALE  |               |           |         |      |        |
| 4.3B: THE    |               |           |         |      |        |
| PROBLEM      |               |           |         |      |        |
| CONDITION IS |               |           |         |      |        |
| CLEARLY      |               |           |         |      |        |
| SCREENED     |               |           |         |      |        |
|              |               |           |         |      |        |
| DURING       |               |           |         |      |        |
| PRE-FLIGHT   |               |           |         |      |        |
| CHECKOUT OR  |               |           |         |      |        |
| SPECIAL      |               |           |         |      |        |
| TEST.        |               |           |         |      |        |
| SIGNATURES   |               |           |         |      |        |
| ON FILE IN   |               |           |         |      |        |
| THE          |               |           |         |      |        |
|              |               |           |         |      |        |
| PAC.         |               |           |         |      |        |
|              |               |           |         |      |        |
| 01/30/2003 - |               |           |         |      |        |
| BOARD        |               |           |         |      |        |
| ACCEPTED     |               |           |         |      |        |
| PROBLEM      |               |           |         |      |        |
| CLOSURE      |               |           |         |      |        |
| RATIONALE.   |               |           |         |      |        |
| SIGNATURES   |               |           |         |      |        |
| ARE          |               |           |         |      |        |
|              |               |           |         |      |        |
| ON FILE IN   |               |           |         |      |        |
| THE PAC.     |               |           |         |      |        |
| THIS PROBLEM |               |           |         |      |        |
| IS           |               |           |         |      |        |
| OFFICIALLY   |               |           |         |      |        |
| CLOSED.      |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+

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

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

  --------------- ---------------------- ---------------- ----------- ----------- ------------
  **MSFC          **IFA#**\              **Contractor     **JSC#**\   **KSC#**\   **EICN#**\
  Report#**\      \--                    RPT#**\          \--         \--         \--
  A17820                                 E-170                                    

  **Asmnt         **Asmnt Part Name**\   **Asmnt                                  
  Part#**\        LH2 LIQUID SENSOR LV   Serial/Lot#**\                           
  74L4-2                                 0003354                                  

  **HCRIT CD**\   **FCRIT CD**\          **CAUSE CD**\    **FAIL                  
  1R              1R                     DH - DES-HDW     MODE**\                 
                                                          EL - SHORT              

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

  **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**                                                                          
  --------------- ---------------------- ---------------- ----------- ----------- ------------