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

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

+--------------+---------------+-----------+---------+------+--------+
| **MSFC       | **In-Flight   | **C       | **      | *    |        |
| Record \#**\ | Anomaly       | ontractor | JSC#**\ | *KSC |        |
| A13149       | Number**\     | Report    | \--     | #**\ |        |
|              | \--           | Number**\ |         | \--  |        |
|              |               | E-138     |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **Problem    |               |           |         |      |        |
| Title**\     |               |           |         |      |        |
| L02 LEVEL    |               |           |         |      |        |
| SENSOR       |               |           |         |      |        |
| FAILED       |               |           |         |      |        |
| ISOLATION    |               |           |         |      |        |
| RESISTANCE   |               |           |         |      |        |
| TEST         |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **EICN#**\   | **ELEMENT**\  | **Cont    | **F     | **   |        |
| \--          | ET            | ractor**\ | SCM#**\ | FCRI |        |
|              |               | MMMSS     | \--     | T**\ |        |
|              |               |           |         | 1R   |        |
+--------------+---------------+-----------+---------+------+--------+
| **HCRIT**\   | **Sys_Lvl**\  | **Misc    |         |      |        |
| \--          | N             | 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          | L02 LEVEL     | 74L4-1    | 1477    | UFAC |        |
|              | SENSOR        |           |         | TURE |        |
|              |               |           |         | R**\ |        |
|              |               |           |         | SIMM |        |
|              |               |           |         | ONDS |        |
+--------------+---------------+-----------+---------+------+--------+
| **Test/      | **Prevailing  | **F /     | **Fail  | **   |        |
| Operation**\ | Condtion**\   | U**\      | Mode**\ | Caus |        |
| A - ATP      | F -           | F         | EL -    | e**\ |        |
|              | FUNCTIONAL    |           | SHORT   | U -  |        |
|              |               |           |         | UNK  |        |
|              |               |           |         | NOWN |        |
+--------------+---------------+-----------+---------+------+--------+
| **System**\  | **Defect**\   | **Ma      | **Work  | **   |        |
| ELECTRICAL   | \--           | terial**\ | Con     | Fail |        |
|              |               | B -       | tact**\ | Dat  |        |
|              |               | CIRCBD    | J.      | e**\ |        |
|              |               |           | ADAMS   | 08   |        |
|              |               |           |         | /27/ |        |
|              |               |           |         | 1990 |        |
+--------------+---------------+-----------+---------+------+--------+
| **Received   | **Date        | **FMEA    | **IFA:  | *    |        |
| at MSFC**\   | Isolated**\   | Ref       | Mission | *Mis |        |
| 08/29/1990   | 08/28/1990    | erence**\ | P       | sion |        |
|              |               | 3.6.1.1   | hase**\ | Ela  |        |
|              |               |           | \--     | psed |        |
|              |               |           |         | Tim  |        |
|              |               |           |         | e**\ |        |
|              |               |           |         | \--  |        |
+--------------+---------------+-----------+---------+------+--------+
| *            |               | **S       |         | **   |        |
| *Location**\ |               | ymptom**\ |         | Time |        |
| SIMMONDS     |               | EL -      |         | Cycl |        |
|              |               | SHORT     |         | e**\ |        |
|              |               |           |         | \--  |        |
+--------------+---------------+-----------+---------+------+--------+
| *            |               |           |         |      |        |
| *Effectivity |               |           |         |      |        |
| Text**\      |               |           |         |      |        |
| DEFERRED,    |               |           |         |      |        |
| 8/29/90;     |               |           |         |      |        |
| CLOSED       |               |           |         |      |        |
| 12/11/90     |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **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**\      | \--           |           | Ac      |      |        |
| 09/28/1990   |               |           | tion**\ |      |        |
|              |               |           | \--     |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **I          |               |           |         |      |        |
| nvestigation |               |           |         |      |        |
| / Resolution |               |           |         |      |        |
| Summary**    |               |           |         |      |        |
|              |               |           |         |      |        |
| ROOT CAUSE   |               |           |         |      |        |
| COULD NOT BE |               |           |         |      |        |
| DETERMINED.  |               |           |         |      |        |
| NO           |               |           |         |      |        |
| MECHANICAL   |               |           |         |      |        |
| DEFECT WAS   |               |           |         |      |        |
| FOUND        |               |           |         |      |        |
|              |               |           |         |      |        |
| IN THE       |               |           |         |      |        |
| SENSOR       |               |           |         |      |        |
| COMPONENTS   |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **Last MSFC  | **CN RSLV     | **Defer   | **Add   | *    |        |
| Update**\    | SBMT**\       | Date**\   | Date**\ | *R/C |        |
| 12/12/1990   | 11/09/1990    | \--       | 08/     | Code |        |
|              |               |           | 29/1990 | s**\ |        |
|              |               |           |         | 0 -  |        |
|              |               |           |         | EXPL |        |
|              |               |           |         | \--  |        |
|              |               |           |         | \--  |        |
+--------------+---------------+-----------+---------+------+--------+
| **Assignee** |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **Design**\  | **Chief       | **S &     | **Pro   | *    |        |
| R. MOYE      | Engineer**\   | MA**\     | ject**\ | *Pro |        |
|              | M. PESSIN     | R.        | \--     | ject |        |
|              |               | JACKSON   |         | MG   |        |
|              |               |           |         | R**\ |        |
|              |               |           |         | G.   |        |
|              |               |           |         | LA   |        |
|              |               |           |         | DNER |        |
+--------------+---------------+-----------+---------+------+--------+
| **Approval** |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **Design**\  | **Chief       | **S &     | **Pro   | *    |        |
| R. MOYE      | Engineer**\   | MA**\     | ject**\ | *Pro |        |
|              | M. PESSIN     | R.        | \--     | ject |        |
|              |               | JACKSON   |         | MG   |        |
|              |               |           |         | R**\ |        |
|              |               |           |         | G.   |        |
|              |               |           |         | LA   |        |
|              |               |           |         | DNER |        |
+--------------+---------------+-----------+---------+------+--------+
| **PAC        | **PAC Review  | **MSFC    | **St    | *    |        |
| Assignee**\  | Complete**\   | Closure   | atus**\ | *F/A |        |
| T. HESTER    | TH            | Date**\   | C -     | C    |        |
|              |               | 1         | CLOSED  | ompl |        |
|              |               | 2/11/1990 |         | etio |        |
|              |               |           |         | n**\ |        |
|              |               |           |         | 11   |        |
|              |               |           |         | /02/ |        |
|              |               |           |         | 1990 |        |
+--------------+---------------+-----------+---------+------+--------+
| **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**\         |           |         |      |        |
| \--          | MARS T-53580  |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **Related    |               |           |         |      |        |
| Document     |               |           |         |      |        |
| Title**\     |               |           |         |      |        |
| \--          |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **Related    | **Related     |           |         |      |        |
| Document     | Document      |           |         |      |        |
| Type**\      | ID**\         |           |         |      |        |
| \--          | \--           |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **Related    |               |           |         |      |        |
| Document     |               |           |         |      |        |
| Title**\     |               |           |         |      |        |
| \--          |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **Related    | **Related     |           |         |      |        |
| Document     | Document      |           |         |      |        |
| Type**\      | ID**\         |           |         |      |        |
| \--          | \--           |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **Related    |               |           |         |      |        |
| Document     |               |           |         |      |        |
| Title**\     |               |           |         |      |        |
| \--          |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **Contractor |               |           |         |      |        |
| Status       |               |           |         |      |        |
| Summary**    |               |           |         |      |        |
|              |               |           |         |      |        |
| CLOSURE      |               |           |         |      |        |
| RATIONALE    |               |           |         |      |        |
| SUBMITTED,   |               |           |         |      |        |
| 11/09/90     |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **Reliabi    |               |           |         |      |        |
| lity/Quality |               |           |         |      |        |
| Assurance    |               |           |         |      |        |
| Concerns,    |               |           |         |      |        |
| Recomm       |               |           |         |      |        |
| endations:** |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **Problem    |               |           |         |      |        |
| D            |               |           |         |      |        |
| escription** |               |           |         |      |        |
|              |               |           |         |      |        |
| A LIQUID     |               |           |         |      |        |
| LEVEL SENSOR |               |           |         |      |        |
| FAILED TO    |               |           |         |      |        |
| SATISFY THE  |               |           |         |      |        |
| ISOLATION    |               |           |         |      |        |
| RESISTANCE   |               |           |         |      |        |
|              |               |           |         |      |        |
| REQUIREMENTS |               |           |         |      |        |
| STIPULATED   |               |           |         |      |        |
| IN THE       |               |           |         |      |        |
| VENDOR       |               |           |         |      |        |
| ACCEPTANCE   |               |           |         |      |        |
| PLAN.        |               |           |         |      |        |
| SUBSEQUENT   |               |           |         |      |        |
| TO           |               |           |         |      |        |
|              |               |           |         |      |        |
| THERMAL      |               |           |         |      |        |
| SHOCK        |               |           |         |      |        |
| TREATMENT,   |               |           |         |      |        |
| THE          |               |           |         |      |        |
| TRANSDUCER   |               |           |         |      |        |
| FAILED TO    |               |           |         |      |        |
| MEET AN      |               |           |         |      |        |
| ISOLATION    |               |           |         |      |        |
|              |               |           |         |      |        |
| RESISTANCE   |               |           |         |      |        |
| OF 500       |               |           |         |      |        |
| MEGOHMS AT   |               |           |         |      |        |
| 500 VDC. A   |               |           |         |      |        |
| RESISTANCE   |               |           |         |      |        |
| OF 400       |               |           |         |      |        |
| MEGOHMS WAS  |               |           |         |      |        |
|              |               |           |         |      |        |
| OBTAINED.    |               |           |         |      |        |
| PREVIOUS     |               |           |         |      |        |
| CAPS: E-071, |               |           |         |      |        |
| E-073,       |               |           |         |      |        |
| E-075,       |               |           |         |      |        |
| E-081,       |               |           |         |      |        |
| E-100,       |               |           |         |      |        |
| E-116PF      |               |           |         |      |        |
|              |               |           |         |      |        |
| AND E-126    |               |           |         |      |        |
| ARE RELATED  |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **Contractor |               |           |         |      |        |
| In           |               |           |         |      |        |
| vestigation/ |               |           |         |      |        |
| Resolution** |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **MSFC       |               |           |         |      |        |
| Response/C   |               |           |         |      |        |
| oncurrence** |               |           |         |      |        |
|              |               |           |         |      |        |
| GENERAL:     |               |           |         |      |        |
|              |               |           |         |      |        |
| THE FAILURE  |               |           |         |      |        |
| OCCURRED     |               |           |         |      |        |
| DURING       |               |           |         |      |        |
| VENDOR       |               |           |         |      |        |
| ACCEPTANCE   |               |           |         |      |        |
| TESTING PER  |               |           |         |      |        |
| ATP 946 REV  |               |           |         |      |        |
| M            |               |           |         |      |        |
|              |               |           |         |      |        |
| PARAGRAPH    |               |           |         |      |        |
| 6.5.2. THE   |               |           |         |      |        |
| COMPONENT    |               |           |         |      |        |
| HAD BEEN     |               |           |         |      |        |
| SUBJECTED TO |               |           |         |      |        |
| SIX CYCLES   |               |           |         |      |        |
| OF           |               |           |         |      |        |
|              |               |           |         |      |        |
| LIQUID       |               |           |         |      |        |
| NITROGEN     |               |           |         |      |        |
| TEMPERATURES |               |           |         |      |        |
| AT HALF HOUR |               |           |         |      |        |
| INTERVALS    |               |           |         |      |        |
| BAKED AT 130 |               |           |         |      |        |
| DEGREES      |               |           |         |      |        |
|              |               |           |         |      |        |
| FAHRENHEIT   |               |           |         |      |        |
| AND COOLED   |               |           |         |      |        |
| PRIOR TO THE |               |           |         |      |        |
| ISOLATION    |               |           |         |      |        |
| RESISTANCE   |               |           |         |      |        |
| TEST. AN     |               |           |         |      |        |
|              |               |           |         |      |        |
| ISOLATION    |               |           |         |      |        |
| RESISTANCE   |               |           |         |      |        |
| OF 400       |               |           |         |      |        |
| MEGOHMS WAS  |               |           |         |      |        |
| NOTED AFTER  |               |           |         |      |        |
| IMPRESSING   |               |           |         |      |        |
| 500          |               |           |         |      |        |
|              |               |           |         |      |        |
| V.D.C.       |               |           |         |      |        |
| MISSING THE  |               |           |         |      |        |
| 500 MEGOHM   |               |           |         |      |        |
| REQUIREMENT  |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK I.      |               |           |         |      |        |
| FAILURE      |               |           |         |      |        |
| I            |               |           |         |      |        |
| NVESTIGATION |               |           |         |      |        |
|              |               |           |         |      |        |
| THE FAILURE  |               |           |         |      |        |
| WAS          |               |           |         |      |        |
| DOCUMENTED   |               |           |         |      |        |
| ON MARS      |               |           |         |      |        |
| T-53580. A   |               |           |         |      |        |
| FAILURE      |               |           |         |      |        |
| ANALYSIS     |               |           |         |      |        |
| WILL BE      |               |           |         |      |        |
|              |               |           |         |      |        |
| PERFORMED, A |               |           |         |      |        |
| PLAN FOR     |               |           |         |      |        |
| WHICH IS IN  |               |           |         |      |        |
| PROCESS BY   |               |           |         |      |        |
| THE VENDOR.  |               |           |         |      |        |
| SCHEDULING   |               |           |         |      |        |
| FOR          |               |           |         |      |        |
|              |               |           |         |      |        |
| THE TASK     |               |           |         |      |        |
| DEPENDS UPON |               |           |         |      |        |
| FINAL        |               |           |         |      |        |
| APPROVAL OF  |               |           |         |      |        |
| THE F/A PLAN |               |           |         |      |        |
|              |               |           |         |      |        |
| ECD: 9/28/90 |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK OPEN    |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK II.     |               |           |         |      |        |
| CORRECTIVE   |               |           |         |      |        |
| ACTION       |               |           |         |      |        |
|              |               |           |         |      |        |
| PENDING THE  |               |           |         |      |        |
| RESULTS OF   |               |           |         |      |        |
| THE FAILURE  |               |           |         |      |        |
| I            |               |           |         |      |        |
| NVESTIGATION |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK OPEN    |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK III.    |               |           |         |      |        |
| CLEARANCE OF |               |           |         |      |        |
| E            |               |           |         |      |        |
| FFECTIVITIES |               |           |         |      |        |
|              |               |           |         |      |        |
| ALL          |               |           |         |      |        |
| E            |               |           |         |      |        |
| FFECTIVITIES |               |           |         |      |        |
| ARE CLEARED  |               |           |         |      |        |
| SINCE        |               |           |         |      |        |
| INSTALLED    |               |           |         |      |        |
| TRANSDUCERS  |               |           |         |      |        |
| HAVE         |               |           |         |      |        |
|              |               |           |         |      |        |
| SUCCESSFULLY |               |           |         |      |        |
| PASSED THE   |               |           |         |      |        |
| ACCEPTANCE   |               |           |         |      |        |
| TEST         |               |           |         |      |        |
| PROCEDURE    |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK CLOSED  |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK IV.     |               |           |         |      |        |
| CAPS CLOSURE |               |           |         |      |        |
| SUMMARY      |               |           |         |      |        |
|              |               |           |         |      |        |
| PENDING THE  |               |           |         |      |        |
| COMPLETION   |               |           |         |      |        |
| OF THE OTHER |               |           |         |      |        |
| TASKS        |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK OPEN    |               |           |         |      |        |
|              |               |           |         |      |        |
| 8/29/90 -    |               |           |         |      |        |
| THIS REPORT  |               |           |         |      |        |
| HAS BEEN     |               |           |         |      |        |
| DEFERRED FOR |               |           |         |      |        |
| THE NEXT     |               |           |         |      |        |
| THREE SPACE  |               |           |         |      |        |
| SHUTTLE      |               |           |         |      |        |
|              |               |           |         |      |        |
| MISSIONS,    |               |           |         |      |        |
| THESE THREE  |               |           |         |      |        |
| MISSIONS ARE |               |           |         |      |        |
| CURRENTLY    |               |           |         |      |        |
| DEFINED AS   |               |           |         |      |        |
| STS-35,      |               |           |         |      |        |
| STS-41,      |               |           |         |      |        |
|              |               |           |         |      |        |
| & STS-38,    |               |           |         |      |        |
| PER NSTS     |               |           |         |      |        |
| 07700,       |               |           |         |      |        |
| VOLUME XI,   |               |           |         |      |        |
| PARAGRAPH    |               |           |         |      |        |
| 3.4.1, ITEM  |               |           |         |      |        |
| C AND NSTS   |               |           |         |      |        |
|              |               |           |         |      |        |
| 08126,       |               |           |         |      |        |
| PARAGRAPH    |               |           |         |      |        |
| 3.2,         |               |           |         |      |        |
| S            |               |           |         |      |        |
| UB-PARAGRAPH |               |           |         |      |        |
| D, ITEM 3    |               |           |         |      |        |
| WHICH STATES |               |           |         |      |        |
| \"THE        |               |           |         |      |        |
| PROBLEM      |               |           |         |      |        |
|              |               |           |         |      |        |
| CONDITION    |               |           |         |      |        |
| DOES NOT     |               |           |         |      |        |
| EXIST IN THE |               |           |         |      |        |
| FLIGHT       |               |           |         |      |        |
| HARDWARE AND |               |           |         |      |        |
| IS CLEARLY   |               |           |         |      |        |
| SCREENED     |               |           |         |      |        |
|              |               |           |         |      |        |
| BY           |               |           |         |      |        |
| ACCEPTANCE   |               |           |         |      |        |
| TEST,        |               |           |         |      |        |
| PREFLIGHT    |               |           |         |      |        |
| CHECKOUT, OR |               |           |         |      |        |
| SPECIAL      |               |           |         |      |        |
| TEST.\"      |               |           |         |      |        |
|              |               |           |         |      |        |
| \*\*\*       |               |           |         |      |        |
| \*\*\*\*\*\* |               |           |         |      |        |
| \*\*\*\*\*\* |               |           |         |      |        |
| \*\*\*\*\*\* |               |           |         |      |        |
| \*\*\*\*\*\* |               |           |         |      |        |
| \*\*\*\*\*\* |               |           |         |      |        |
| \*\*\*\*\*\* |               |           |         |      |        |
| \*\*\*\*\*\* |               |           |         |      |        |
| \*\*\*\*\*\* |               |           |         |      |        |
| \*\*\*\*\*\* |               |           |         |      |        |
| \*\*\*\*\*\* |               |           |         |      |        |
| \*\*\*\*\*\* |               |           |         |      |        |
|              |               |           |         |      |        |
| 8/29/90 -    |               |           |         |      |        |
| DEFERRAL     |               |           |         |      |        |
| RATIONALE    |               |           |         |      |        |
| APPROVED BY  |               |           |         |      |        |
| ET PROJECT   |               |           |         |      |        |
| MANAGER,     |               |           |         |      |        |
|              |               |           |         |      |        |
| G. LADNER    |               |           |         |      |        |
|              |               |           |         |      |        |
| \*\*\*       |               |           |         |      |        |
| \*\*\*\*\*\* |               |           |         |      |        |
| \*\*\*\*\*\* |               |           |         |      |        |
| \*\*\*\*\*\* |               |           |         |      |        |
| \*\*\*\*\*\* |               |           |         |      |        |
| \*\*\*\*\*\* |               |           |         |      |        |
| \*\*\*\*\*\* |               |           |         |      |        |
| \*\*\*\*\*\* |               |           |         |      |        |
| \*\*\*\*\*\* |               |           |         |      |        |
| \*\*\*\*\*\* |               |           |         |      |        |
| \*\*\*\*\*\* |               |           |         |      |        |
| \*\*\*\*\*\* |               |           |         |      |        |
|              |               |           |         |      |        |
| 9/17/90 -    |               |           |         |      |        |
| REV. A       |               |           |         |      |        |
| RECEIVED     |               |           |         |      |        |
| FROM         |               |           |         |      |        |
| CONTRACTOR,  |               |           |         |      |        |
| SUPERCEDES   |               |           |         |      |        |
| PREVIOUS     |               |           |         |      |        |
| REPORT       |               |           |         |      |        |
|              |               |           |         |      |        |
| 11/13/90 -   |               |           |         |      |        |
| REV. B       |               |           |         |      |        |
| RECEIVED     |               |           |         |      |        |
| FROM         |               |           |         |      |        |
| CONTRACTOR,  |               |           |         |      |        |
| SUPERCEDES   |               |           |         |      |        |
| PREVIOUS     |               |           |         |      |        |
| REPORT       |               |           |         |      |        |
|              |               |           |         |      |        |
| PROBLEM      |               |           |         |      |        |
| DESCRIPTION: |               |           |         |      |        |
|              |               |           |         |      |        |
| A LIQUID     |               |           |         |      |        |
| LEVEL SENSOR |               |           |         |      |        |
| FAILED TO    |               |           |         |      |        |
| SATISFY THE  |               |           |         |      |        |
| INSULATION   |               |           |         |      |        |
| RESISTANCE   |               |           |         |      |        |
|              |               |           |         |      |        |
| REQUIREMENTS |               |           |         |      |        |
| STIPULATED   |               |           |         |      |        |
| IN THE       |               |           |         |      |        |
| VENDOR       |               |           |         |      |        |
| ACCEPTANCE   |               |           |         |      |        |
| PLAN. THE    |               |           |         |      |        |
| TRANSDUCER   |               |           |         |      |        |
|              |               |           |         |      |        |
| FAILED TO    |               |           |         |      |        |
| MEET AN      |               |           |         |      |        |
| INSULATION   |               |           |         |      |        |
| RESISTANCE   |               |           |         |      |        |
| OF 500       |               |           |         |      |        |
| MEGOHMS AT   |               |           |         |      |        |
| 500 VDC. A   |               |           |         |      |        |
|              |               |           |         |      |        |
| RESISTANCE   |               |           |         |      |        |
| OF 400       |               |           |         |      |        |
| MEGOHMS WAS  |               |           |         |      |        |
| OBTAINED     |               |           |         |      |        |
|              |               |           |         |      |        |
| CRITICALITY: |               |           |         |      |        |
| THE 74L4-1   |               |           |         |      |        |
| SENSOR IS    |               |           |         |      |        |
| VIRTUALLY    |               |           |         |      |        |
| IDENTICAL TO |               |           |         |      |        |
| THE 74L4-2   |               |           |         |      |        |
|              |               |           |         |      |        |
| SENSOR WHICH |               |           |         |      |        |
| IS CRIT. 1R; |               |           |         |      |        |
| FMEA ITEM    |               |           |         |      |        |
| CODE         |               |           |         |      |        |
| 3.6.1.1;     |               |           |         |      |        |
| \"FAILS WITH |               |           |         |      |        |
| FALSE WET    |               |           |         |      |        |
|              |               |           |         |      |        |
| SIGNAL.\"    |               |           |         |      |        |
|              |               |           |         |      |        |
| REVISION B - |               |           |         |      |        |
| CLOSED ALL   |               |           |         |      |        |
| TASKS        |               |           |         |      |        |
|              |               |           |         |      |        |
| GENERAL:     |               |           |         |      |        |
|              |               |           |         |      |        |
| THE FAILURE  |               |           |         |      |        |
| OCCURRED     |               |           |         |      |        |
| DURING       |               |           |         |      |        |
| VENDOR       |               |           |         |      |        |
| ACCEPTANCE   |               |           |         |      |        |
| TESTING PER  |               |           |         |      |        |
| ATP 946, REV |               |           |         |      |        |
|              |               |           |         |      |        |
| M, PARAGRAPH |               |           |         |      |        |
| 6.5. AN      |               |           |         |      |        |
| INSULATION   |               |           |         |      |        |
| RESISTANCE   |               |           |         |      |        |
| OF 400       |               |           |         |      |        |
| MEGOHMS WAS  |               |           |         |      |        |
| OBTAINED     |               |           |         |      |        |
|              |               |           |         |      |        |
| DURING THE   |               |           |         |      |        |
| 500 VDC      |               |           |         |      |        |
| TEST. THE    |               |           |         |      |        |
| REQUIREMENT  |               |           |         |      |        |
| IS A MINIMUM |               |           |         |      |        |
| OF 500       |               |           |         |      |        |
| MEGOHMS      |               |           |         |      |        |
|              |               |           |         |      |        |
| 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 SENSOR   |               |           |         |      |        |
|              |               |           |         |      |        |
| 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 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     |               |           |         |      |        |
| (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      |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK I.      |               |           |         |      |        |
| FAILURE      |               |           |         |      |        |
| I            |               |           |         |      |        |
| NVESTIGATION |               |           |         |      |        |
|              |               |           |         |      |        |
| THE FAILURE  |               |           |         |      |        |
| WAS          |               |           |         |      |        |
| DOCUMENTED   |               |           |         |      |        |
| ON MARS      |               |           |         |      |        |
| T-53580. A   |               |           |         |      |        |
| FAILURE      |               |           |         |      |        |
| ANALYSIS     |               |           |         |      |        |
| WILL BE      |               |           |         |      |        |
|              |               |           |         |      |        |
| PERFORMED    |               |           |         |      |        |
|              |               |           |         |      |        |
| COMPLETE:    |               |           |         |      |        |
| 11/02/90     |               |           |         |      |        |
|              |               |           |         |      |        |
| CLOSURE      |               |           |         |      |        |
| STATEMENT    |               |           |         |      |        |
|              |               |           |         |      |        |
| THE          |               |           |         |      |        |
| ELECTRICAL   |               |           |         |      |        |
| FAILURE      |               |           |         |      |        |
| WOULD NOT    |               |           |         |      |        |
| REPEAT       |               |           |         |      |        |
| DURING       |               |           |         |      |        |
| FAILURE      |               |           |         |      |        |
| ANALYSIS     |               |           |         |      |        |
|              |               |           |         |      |        |
| DISASSEMBLY  |               |           |         |      |        |
| AND          |               |           |         |      |        |
| EXAMINATION  |               |           |         |      |        |
| OF THE       |               |           |         |      |        |
| INTERNAL     |               |           |         |      |        |
| COMPONENTS   |               |           |         |      |        |
| FOUND NO     |               |           |         |      |        |
|              |               |           |         |      |        |
| MECHANICAL   |               |           |         |      |        |
| FLAWS OR     |               |           |         |      |        |
| DEFECTS. THE |               |           |         |      |        |
| ROOT CAUSE   |               |           |         |      |        |
| OF THE       |               |           |         |      |        |
| FAILURE      |               |           |         |      |        |
| COULD NOT BE |               |           |         |      |        |
|              |               |           |         |      |        |
| DETERMINED.  |               |           |         |      |        |
| REFERENCE    |               |           |         |      |        |
| FAR T53580   |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK CLOSED  |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK II.     |               |           |         |      |        |
| CORRECTIVE   |               |           |         |      |        |
| ACTION       |               |           |         |      |        |
|              |               |           |         |      |        |
| NO           |               |           |         |      |        |
| CORRECTIVE   |               |           |         |      |        |
| ACTION IS    |               |           |         |      |        |
| REQUIRED. NO |               |           |         |      |        |
| DEFECT COULD |               |           |         |      |        |
| BE FOUND IN  |               |           |         |      |        |
| THE          |               |           |         |      |        |
|              |               |           |         |      |        |
| SENSOR       |               |           |         |      |        |
| COMPONENTS.  |               |           |         |      |        |
| THE SENSOR   |               |           |         |      |        |
| DESIGN DOES  |               |           |         |      |        |
| NOT PROVIDE  |               |           |         |      |        |
| POSITIVE     |               |           |         |      |        |
|              |               |           |         |      |        |
| MECHANICAL   |               |           |         |      |        |
| SEPARATION   |               |           |         |      |        |
| BETWEEN THE  |               |           |         |      |        |
| GOLD CIRCUIT |               |           |         |      |        |
| PATH ON THE  |               |           |         |      |        |
| INTERNAL     |               |           |         |      |        |
|              |               |           |         |      |        |
| SENSING      |               |           |         |      |        |
| ELEMENT AND  |               |           |         |      |        |
| THE TEFLON   |               |           |         |      |        |
| COATED METAL |               |           |         |      |        |
| CASE. THE    |               |           |         |      |        |
| RESULTANT    |               |           |         |      |        |
|              |               |           |         |      |        |
| SU           |               |           |         |      |        |
| SCEPTIBILITY |               |           |         |      |        |
| OF THE       |               |           |         |      |        |
| SENSOR TO    |               |           |         |      |        |
| ISOLATION    |               |           |         |      |        |
| RESISTANCE   |               |           |         |      |        |
| PROBLEMS DUE |               |           |         |      |        |
| TO THE       |               |           |         |      |        |
|              |               |           |         |      |        |
| CLOSE        |               |           |         |      |        |
| PROXIMITY OF |               |           |         |      |        |
| THE GOLD     |               |           |         |      |        |
| CIRCUIT PATH |               |           |         |      |        |
| TO THE       |               |           |         |      |        |
| TEFLON       |               |           |         |      |        |
| COATED CASE  |               |           |         |      |        |
| UNDER        |               |           |         |      |        |
|              |               |           |         |      |        |
| VARYING      |               |           |         |      |        |
| HUMIDITY     |               |           |         |      |        |
| CONDITIONS   |               |           |         |      |        |
| WAS          |               |           |         |      |        |
| RECOGNIZED   |               |           |         |      |        |
| IN CAPS      |               |           |         |      |        |
| E-100 AND    |               |           |         |      |        |
| RESOLVED     |               |           |         |      |        |
|              |               |           |         |      |        |
| THROUGH      |               |           |         |      |        |
| CHANGE       |               |           |         |      |        |
| SUMMARY      |               |           |         |      |        |
| BO1806. THE  |               |           |         |      |        |
| CHANGE       |               |           |         |      |        |
| SUMMARY      |               |           |         |      |        |
| ENHANCED THE |               |           |         |      |        |
|              |               |           |         |      |        |
| SUPPLIER\'S  |               |           |         |      |        |
| TEST         |               |           |         |      |        |
| REQUIREMENTS |               |           |         |      |        |
| TO ENSURE    |               |           |         |      |        |
| THE          |               |           |         |      |        |
| OCCASIONAL   |               |           |         |      |        |
| SENSOR       |               |           |         |      |        |
| SUSCEPTIBLE  |               |           |         |      |        |
|              |               |           |         |      |        |
| TO HUMIDITY  |               |           |         |      |        |
| INDUCED I.R. |               |           |         |      |        |
| FAILURE      |               |           |         |      |        |
| WOULD BE     |               |           |         |      |        |
| DETECTED AT  |               |           |         |      |        |
| THE SUPPLIER |               |           |         |      |        |
| AND          |               |           |         |      |        |
|              |               |           |         |      |        |
| THEREBY      |               |           |         |      |        |
| PREVENTED    |               |           |         |      |        |
| FROM         |               |           |         |      |        |
| BECOMING AN  |               |           |         |      |        |
| I.R. FAILURE |               |           |         |      |        |
| DURING CHECK |               |           |         |      |        |
| OUT AT MAF   |               |           |         |      |        |
|              |               |           |         |      |        |
| THERE WAS NO |               |           |         |      |        |
| CONCERN FOR  |               |           |         |      |        |
| FLIGHT DUE   |               |           |         |      |        |
| TO THE DRY   |               |           |         |      |        |
| ENVIRONMENT  |               |           |         |      |        |
| IN WHICH THE |               |           |         |      |        |
|              |               |           |         |      |        |
| SENSORS      |               |           |         |      |        |
| OPERATE AND  |               |           |         |      |        |
| THEIR LOW    |               |           |         |      |        |
| OPERATING    |               |           |         |      |        |
| VOLTAGE.     |               |           |         |      |        |
| CONSIDERING  |               |           |         |      |        |
| THAT THE     |               |           |         |      |        |
|              |               |           |         |      |        |
| SUPPLIER HAS |               |           |         |      |        |
| PRODUCED 80  |               |           |         |      |        |
| SENSORS      |               |           |         |      |        |
| SINCE THE    |               |           |         |      |        |
| LAST FAILURE |               |           |         |      |        |
| HIS          |               |           |         |      |        |
| PROCESSES    |               |           |         |      |        |
|              |               |           |         |      |        |
| ARE STILL IN |               |           |         |      |        |
| GOOD CONTROL |               |           |         |      |        |
| AND NO       |               |           |         |      |        |
| CORRECTIVE   |               |           |         |      |        |
| ACTION IS    |               |           |         |      |        |
| REQUIRED     |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK CLOSED  |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK III.    |               |           |         |      |        |
| CLEARANCE OF |               |           |         |      |        |
| E            |               |           |         |      |        |
| FFECTIVITIES |               |           |         |      |        |
|              |               |           |         |      |        |
| ALL ETS      |               |           |         |      |        |
| CLEARED. ALL |               |           |         |      |        |
| INSTALLED    |               |           |         |      |        |
| TRANSDUCERS  |               |           |         |      |        |
| HAVE         |               |           |         |      |        |
| SUCCESSFULLY |               |           |         |      |        |
| PASSED THE   |               |           |         |      |        |
|              |               |           |         |      |        |
| VENDOR       |               |           |         |      |        |
| ACCEPTANCE   |               |           |         |      |        |
| TEST         |               |           |         |      |        |
| PROCEDURE AS |               |           |         |      |        |
| WELL AS      |               |           |         |      |        |
| ACCEPTANCE   |               |           |         |      |        |
| TESTS ON     |               |           |         |      |        |
|              |               |           |         |      |        |
| COMPLETED    |               |           |         |      |        |
| ETS          |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK CLOSED  |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK IV.     |               |           |         |      |        |
| CAPS CLOSURE |               |           |         |      |        |
| SUMMARY      |               |           |         |      |        |
|              |               |           |         |      |        |
| THE SENSOR   |               |           |         |      |        |
| FAILED THE   |               |           |         |      |        |
| INSULATION   |               |           |         |      |        |
| RESISTANCE   |               |           |         |      |        |
| TEST         |               |           |         |      |        |
| REQUIREMENT  |               |           |         |      |        |
| OF THE       |               |           |         |      |        |
|              |               |           |         |      |        |
| VENDOR       |               |           |         |      |        |
| ACCEPTANCE   |               |           |         |      |        |
| TEST. THE    |               |           |         |      |        |
| VENDOR       |               |           |         |      |        |
| ACCEPTANCE   |               |           |         |      |        |
| TEST         |               |           |         |      |        |
| PROVIDES AN  |               |           |         |      |        |
| ADEQUATE     |               |           |         |      |        |
|              |               |           |         |      |        |
| SCREEN FOR   |               |           |         |      |        |
| FAILURES OF  |               |           |         |      |        |
| THIS TYPE.   |               |           |         |      |        |
| NO           |               |           |         |      |        |
| CORRECTIVE   |               |           |         |      |        |
| ACTION IS    |               |           |         |      |        |
| REQUIRED     |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK CLOSED  |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+

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

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

  ---------------- ------------------- ---------------- ----------- ----------- ------------
  **MSFC           **IFA#**\           **Contractor     **JSC#**\   **KSC#**\   **EICN#**\
  Report#**\       \--                 RPT#**\          \--         \--         \--
  A13149                               E-138                                    

  **Asmnt Part#**\ **Asmnt Part        **Asmnt                                  
  74L4-1           Name**\             Serial/Lot#**\                           
                   L02 LEVEL SENSOR    1477                                     

  **HCRIT CD**\    **FCRIT CD**\       **CAUSE CD**\    **FAIL                  
  \--              1R                  UU - UNK-UND     MODE**\                 
                                                        EL - SHORT              

  **Asmnt FMEA**\  **Asmnt FM**\       **FMEA CSE**\    **FMEA                  
  3.6.1.1          1                   A                SCSE**\                 
                                                        1                       

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

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

  **Correlated     **Correlated        **Correlated                             
  Part#**\         Part#**\            Part#**\                                 
  74L4-2           \--                 \--                                      

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

  **MAJOR DESIGN                                                                
  CHANGES**                                                                     

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

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