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

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

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

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

+--------------+---------------+-----------+---------+------+--------+
| **MSFC       | **In-Flight   | **C       | **      | *    |        |
| Record \#**\ | Anomaly       | ontractor | JSC#**\ | *KSC |        |
| A11139       | Number**\     | Report    | \--     | #**\ |        |
|              | \--           | Number**\ |         | \--  |        |
|              |               | P-060     |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **Problem    |               |           |         |      |        |
| Title**\     |               |           |         |      |        |
| INTERIOR     |               |           |         |      |        |
| DEBRIS WAS   |               |           |         |      |        |
| FOUND UPON   |               |           |         |      |        |
| ENTRY OF LWT |               |           |         |      |        |
| 24 LH2 TANK  |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **EICN#**\   | **ELEMENT**\  | **Cont    | **F     | **   |        |
| \--          | ET            | ractor**\ | SCM#**\ | FCRI |        |
|              |               | MMMSS     | \--     | T**\ |        |
|              |               |           |         | 3    |        |
+--------------+---------------+-----------+---------+------+--------+
| **HCRIT**\   | **Sys_Lvl**\  | **Misc    |         |      |        |
| \--          | N             | Codes**\  |         |      |        |
|              |               | A B C D E |         |      |        |
|              |               | **(X)** F |         |      |        |
|              |               | G H I J K |         |      |        |
|              |               | L M N O   |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| *            | **NO          | *         | **SER/  | *    |        |
| *HARDWARE**\ | MENCLATURE**\ | *PART#**\ | LOT#**\ | *MAN |        |
| EIM          | N/A           | N/A       | N/A     | UFAC |        |
|              |               |           |         | TURE |        |
|              |               |           |         | R**\ |        |
|              |               |           |         | N/A  |        |
+--------------+---------------+-----------+---------+------+--------+
| *            | **NO          | *         | **SER/  | *    |        |
| *HARDWARE**\ | MENCLATURE**\ | *PART#**\ | LOT#**\ | *MAN |        |
| LRU          | LWT 24        | NOTED     | NOTED   | UFAC |        |
|              |               |           |         | TURE |        |
|              |               |           |         | R**\ |        |
|              |               |           |         | N    |        |
|              |               |           |         | OTED |        |
+--------------+---------------+-----------+---------+------+--------+
| *            | **NO          | *         | **SER/  | *    |        |
| *HARDWARE**\ | MENCLATURE**\ | *PART#**\ | LOT#**\ | *MAN |        |
| NCA          | LH2 TANK      | 809010    | 24      | UFAC |        |
|              |               | 10000-070 |         | TURE |        |
|              |               |           |         | R**\ |        |
|              |               |           |         | MMC  |        |
+--------------+---------------+-----------+---------+------+--------+
| **Test/      | **Prevailing  | **F /     | **Fail  | **   |        |
| Operation**\ | Condtion**\   | U**\      | Mode**\ | Caus |        |
| L - FLD      | N -           | UC        | UC -    | e**\ |        |
|              | INSPECTION    |           | UNSAT   | ES - |        |
|              |               |           |         | EI-  |        |
|              |               |           |         | SHIP |        |
+--------------+---------------+-----------+---------+------+--------+
| **System**\  | **Defect**\   | **Ma      | **Work  | **   |        |
| PROPULSION   | CN - CONTAM   | terial**\ | Con     | Fail |        |
|              |               | N - HOLE  | tact**\ | Dat  |        |
|              |               |           | C.      | e**\ |        |
|              |               |           | C       | 12   |        |
|              |               |           | AMPBELL | /24/ |        |
|              |               |           |         | 1987 |        |
+--------------+---------------+-----------+---------+------+--------+
| **Received   | **Date        | **FMEA    | **IFA:  | *    |        |
| at MSFC**\   | Isolated**\   | Ref       | Mission | *Mis |        |
| 12/21/1987   | \--           | erence**\ | P       | sion |        |
|              |               | N/A       | hase**\ | Ela  |        |
|              |               |           | \--     | psed |        |
|              |               |           |         | Tim  |        |
|              |               |           |         | e**\ |        |
|              |               |           |         | \--  |        |
+--------------+---------------+-----------+---------+------+--------+
| *            |               | **S       |         | **   |        |
| *Location**\ |               | ymptom**\ |         | Time |        |
| KSC          |               | UC -      |         | Cycl |        |
|              |               | UNSAT     |         | e**\ |        |
|              |               |           |         | \--  |        |
+--------------+---------------+-----------+---------+------+--------+
| *            |               |           |         |      |        |
| *Effectivity |               |           |         |      |        |
| Text**\      |               |           |         |      |        |
| LWT 16 AND   |               |           |         |      |        |
| UP           |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **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      |      |        |
| \--          |               |           | tion**\ |      |        |
|              |               |           | \--     |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **I          |               |           |         |      |        |
| nvestigation |               |           |         |      |        |
| / Resolution |               |           |         |      |        |
| Summary**    |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **Last MSFC  | **CN RSLV     | **Defer   | **Add   | *    |        |
| Update**\    | SBMT**\       | Date**\   | Date**\ | *R/C |        |
| 07/18/1988   | 05/26/1988    | \--       | 12/     | Code |        |
|              |               |           | 22/1987 | s**\ |        |
|              |               |           |         | 2 -  |        |
|              |               |           |         | MFG  |        |
|              |               |           |         | \--  |        |
|              |               |           |         | \--  |        |
+--------------+---------------+-----------+---------+------+--------+
| **Assignee** |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **Design**\  | **Chief       | **S &     | **Pro   | *    |        |
| P. MULLER    | Engineer**\   | MA**\     | ject**\ | *Pro |        |
|              | J. NICHOLS    | R.        | M.      | ject |        |
|              |               | JACKSON   | PESSIN  | MG   |        |
|              |               |           |         | R**\ |        |
|              |               |           |         | P.   |        |
|              |               |           |         | BRID |        |
|              |               |           |         | WELL |        |
+--------------+---------------+-----------+---------+------+--------+
| **Approval** |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **Design**\  | **Chief       | **S &     | **Pro   | *    |        |
| A. JACKMAN   | Engineer**\   | MA**\     | ject**\ | *Pro |        |
|              | J. NICHOLS    | R.        | M.      | ject |        |
|              |               | JACKSON   | PESSIN  | MG   |        |
|              |               |           |         | R**\ |        |
|              |               |           |         | P.   |        |
|              |               |           |         | BRID |        |
|              |               |           |         | WELL |        |
+--------------+---------------+-----------+---------+------+--------+
| **PAC        | **PAC Review  | **MSFC    | **St    | *    |        |
| Assignee**\  | Complete**\   | Closure   | atus**\ | *F/A |        |
| J.EL-IBRAHIM | JE            | Date**\   | C -     | C    |        |
|              |               | 0         | CLOSED  | ompl |        |
|              |               | 6/03/1988 |         | 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**\         |           |         |      |        |
| \--          | \--           |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **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** |               |           |         |      |        |
|              |               |           |         |      |        |
| UPON ENTRY   |               |           |         |      |        |
| OF LWT-24    |               |           |         |      |        |
| LH2 TANK AT  |               |           |         |      |        |
| KSC A SMALL  |               |           |         |      |        |
| QUANTITY OF  |               |           |         |      |        |
| DEBRIS WAS   |               |           |         |      |        |
|              |               |           |         |      |        |
| OBSERVED IN  |               |           |         |      |        |
| THE AFT DOME |               |           |         |      |        |
| AREA. AMONG  |               |           |         |      |        |
| THE          |               |           |         |      |        |
| PARTICLES    |               |           |         |      |        |
| WAS A PIECE  |               |           |         |      |        |
| OF           |               |           |         |      |        |
|              |               |           |         |      |        |
| SANDPAPER    |               |           |         |      |        |
| A            |               |           |         |      |        |
| PPROXIMATELY |               |           |         |      |        |
| 2 X 3        |               |           |         |      |        |
| INCHES. THIS |               |           |         |      |        |
| CAPS IS OPEN |               |           |         |      |        |
| TO IMPLEMENT |               |           |         |      |        |
|              |               |           |         |      |        |
| CORRECTIVE   |               |           |         |      |        |
| ACTIONS      |               |           |         |      |        |
| NECESSARY TO |               |           |         |      |        |
| PRECLUDE A   |               |           |         |      |        |
| RECURRENCE   |               |           |         |      |        |
| OF           |               |           |         |      |        |
| ABNORMALLY   |               |           |         |      |        |
|              |               |           |         |      |        |
| LARGE        |               |           |         |      |        |
| PARTICLES    |               |           |         |      |        |
| SUCH AS THE  |               |           |         |      |        |
| SANDPAPER.   |               |           |         |      |        |
| THE SMALL    |               |           |         |      |        |
| PARTICLES    |               |           |         |      |        |
| ARE          |               |           |         |      |        |
|              |               |           |         |      |        |
| CONSIDERED   |               |           |         |      |        |
| NORMAL BASED |               |           |         |      |        |
| UPON SAMPLES |               |           |         |      |        |
| TAKEN ON     |               |           |         |      |        |
| OTHER TANKS. |               |           |         |      |        |
| REF:         |               |           |         |      |        |
|              |               |           |         |      |        |
| MARS NO. ARK |               |           |         |      |        |
| 7117, CAPS   |               |           |         |      |        |
| P-0608       |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **Contractor |               |           |         |      |        |
| In           |               |           |         |      |        |
| vestigation/ |               |           |         |      |        |
| Resolution** |               |           |         |      |        |
|              |               |           |         |      |        |
| R/C:         |               |           |         |      |        |
| PROCEDURES,  |               |           |         |      |        |
| PROCESS      |               |           |         |      |        |
| INSTRUCTIONS |               |           |         |      |        |
| AND TRAINING |               |           |         |      |        |
| WERE         |               |           |         |      |        |
| REVIEWED AND |               |           |         |      |        |
|              |               |           |         |      |        |
| REVISED BY   |               |           |         |      |        |
| MMMA         |               |           |         |      |        |
|              |               |           |         |      |        |
| CAUSE:       |               |           |         |      |        |
| EMPLOYEE     |               |           |         |      |        |
| ERROR        |               |           |         |      |        |
|              |               |           |         |      |        |
| 5/26/88 -    |               |           |         |      |        |
| GENERAL      |               |           |         |      |        |
|              |               |           |         |      |        |
| FORMAL       |               |           |         |      |        |
| RESPONSE TO  |               |           |         |      |        |
| THE PROBLEMS |               |           |         |      |        |
| IDENTIFIED   |               |           |         |      |        |
| ON LWT-24    |               |           |         |      |        |
| HAS BEEN     |               |           |         |      |        |
| TRANS-       |               |           |         |      |        |
|              |               |           |         |      |        |
| MITTED TO    |               |           |         |      |        |
| KSC PER AR   |               |           |         |      |        |
| K7177        |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK I.      |               |           |         |      |        |
| FAI          |               |           |         |      |        |
| LURE/PROBLEM |               |           |         |      |        |
| I            |               |           |         |      |        |
| NVESTIGATION |               |           |         |      |        |
|              |               |           |         |      |        |
| ANALYSIS OF  |               |           |         |      |        |
| THE          |               |           |         |      |        |
| C            |               |           |         |      |        |
| ONTAMINATION |               |           |         |      |        |
| REMOVED FROM |               |           |         |      |        |
| LWT-24 TANK  |               |           |         |      |        |
| SHOWS 191    |               |           |         |      |        |
|              |               |           |         |      |        |
| INDIVIDUAL   |               |           |         |      |        |
| PARTICLES    |               |           |         |      |        |
| AND FIBERS   |               |           |         |      |        |
| RANGING FROM |               |           |         |      |        |
| 12 MICRONS   |               |           |         |      |        |
| TO 68,000    |               |           |         |      |        |
|              |               |           |         |      |        |
| (HUMAN HAIR) |               |           |         |      |        |
| MICRONS PLUS |               |           |         |      |        |
| A 2\" X 3\"  |               |           |         |      |        |
| PIECE OF     |               |           |         |      |        |
| SANDPAPER.   |               |           |         |      |        |
| EACH         |               |           |         |      |        |
|              |               |           |         |      |        |
| PARTICLE IS  |               |           |         |      |        |
| IDENTIFIED   |               |           |         |      |        |
| AND SIZED IN |               |           |         |      |        |
| THE ATTACHED |               |           |         |      |        |
| LABORATORY   |               |           |         |      |        |
| REPORT       |               |           |         |      |        |
|              |               |           |         |      |        |
| 87A483. THE  |               |           |         |      |        |
| 191          |               |           |         |      |        |
| PARTICLES    |               |           |         |      |        |
| HAD A TOTAL  |               |           |         |      |        |
| WEIGHT OF    |               |           |         |      |        |
| 0.118 GRAMS  |               |           |         |      |        |
| (LESS        |               |           |         |      |        |
|              |               |           |         |      |        |
| SANDPAPER)   |               |           |         |      |        |
| WITH THE     |               |           |         |      |        |
| FOLLOWING    |               |           |         |      |        |
| DISTRIBUTION |               |           |         |      |        |
|              |               |           |         |      |        |
| 0 - 200      |               |           |         |      |        |
| MICRONS 33   |               |           |         |      |        |
|              |               |           |         |      |        |
| 200 - 500    |               |           |         |      |        |
| MICRONS 31   |               |           |         |      |        |
|              |               |           |         |      |        |
| 500 - 750    |               |           |         |      |        |
| MICRONS 28   |               |           |         |      |        |
|              |               |           |         |      |        |
| 750 -1000    |               |           |         |      |        |
| MICRONS 21   |               |           |         |      |        |
|              |               |           |         |      |        |
| 1000 MICRONS |               |           |         |      |        |
| 75           |               |           |         |      |        |
|              |               |           |         |      |        |
| THE MAJORITY |               |           |         |      |        |
| OF PARTICLES |               |           |         |      |        |
| WERE METAL   |               |           |         |      |        |
| FLAKES (70), |               |           |         |      |        |
| SLA (19),    |               |           |         |      |        |
| BLACK        |               |           |         |      |        |
|              |               |           |         |      |        |
| NEOPRENE     |               |           |         |      |        |
| RUBBER (24), |               |           |         |      |        |
| SAND WITH    |               |           |         |      |        |
| METAL DUST   |               |           |         |      |        |
| (FROM        |               |           |         |      |        |
| SANDPAPER)   |               |           |         |      |        |
| (18),        |               |           |         |      |        |
|              |               |           |         |      |        |
| AND BLACK    |               |           |         |      |        |
| TAPE (12).   |               |           |         |      |        |
| THE          |               |           |         |      |        |
| PARTICLES    |               |           |         |      |        |
| WERE REMOVED |               |           |         |      |        |
| FROM AN AREA |               |           |         |      |        |
| OF           |               |           |         |      |        |
|              |               |           |         |      |        |
| A            |               |           |         |      |        |
| PPROXIMATELY |               |           |         |      |        |
| 1129 SQUARE  |               |           |         |      |        |
| FEET OF      |               |           |         |      |        |
| INTERNAL     |               |           |         |      |        |
| TANK SURFACE |               |           |         |      |        |
|              |               |           |         |      |        |
| THE PARTICLE |               |           |         |      |        |
| SIZE         |               |           |         |      |        |
| DISTRIBUTION |               |           |         |      |        |
| WAS COMPARED |               |           |         |      |        |
| TO           |               |           |         |      |        |
| HISTORICAL   |               |           |         |      |        |
| DATA FROM    |               |           |         |      |        |
|              |               |           |         |      |        |
| LWT-11 THRU  |               |           |         |      |        |
| 15 LH2 TANKS |               |           |         |      |        |
| SAMPLED      |               |           |         |      |        |
| DURING 1984. |               |           |         |      |        |
| SAMPLES WERE |               |           |         |      |        |
| COLLECTED    |               |           |         |      |        |
|              |               |           |         |      |        |
| FROM 15      |               |           |         |      |        |
| SQUARE FEET  |               |           |         |      |        |
| OF INTERNAL  |               |           |         |      |        |
| SURFACE AREA |               |           |         |      |        |
| FROM EACH    |               |           |         |      |        |
| TANK AFTER   |               |           |         |      |        |
| ALL          |               |           |         |      |        |
|              |               |           |         |      |        |
| WORK IN      |               |           |         |      |        |
| FINAL        |               |           |         |      |        |
| ASSEMBLY WAS |               |           |         |      |        |
| ACCOMPLISHED |               |           |         |      |        |
| AND THE      |               |           |         |      |        |
| QUALITY      |               |           |         |      |        |
| WALK-THROUGH |               |           |         |      |        |
|              |               |           |         |      |        |
| AND BUY-OFF  |               |           |         |      |        |
| WERE         |               |           |         |      |        |
| COMPLETE.    |               |           |         |      |        |
| THE SAMPLES  |               |           |         |      |        |
| COLLECTED    |               |           |         |      |        |
| WERE         |               |           |         |      |        |
| REP          |               |           |         |      |        |
| RESENTATIVES |               |           |         |      |        |
|              |               |           |         |      |        |
| OF THE       |               |           |         |      |        |
| C            |               |           |         |      |        |
| ONTAMINATION |               |           |         |      |        |
| LEVELS THAT  |               |           |         |      |        |
| WOULD BE     |               |           |         |      |        |
| PRESENT UPON |               |           |         |      |        |
| DELIVERY OF  |               |           |         |      |        |
| THE          |               |           |         |      |        |
|              |               |           |         |      |        |
| TANK         |               |           |         |      |        |
|              |               |           |         |      |        |
| LWT-11 LH2   |               |           |         |      |        |
| PRODUCED THE |               |           |         |      |        |
| HIGHEST      |               |           |         |      |        |
| DISTRIBUTION |               |           |         |      |        |
| OF           |               |           |         |      |        |
| PARTICLES:   |               |           |         |      |        |
|              |               |           |         |      |        |
| 0 - 200      |               |           |         |      |        |
| MICRONS 780  |               |           |         |      |        |
|              |               |           |         |      |        |
| 200 - 500    |               |           |         |      |        |
| MICRONS 360  |               |           |         |      |        |
|              |               |           |         |      |        |
| 500 - 750    |               |           |         |      |        |
| MICRONS 129  |               |           |         |      |        |
|              |               |           |         |      |        |
| 750 -1000    |               |           |         |      |        |
| MICRONS 222  |               |           |         |      |        |
|              |               |           |         |      |        |
| 1000 MICRONS |               |           |         |      |        |
| 68           |               |           |         |      |        |
|              |               |           |         |      |        |
| THE MAJORITY |               |           |         |      |        |
| OF PARTICLES |               |           |         |      |        |
| WERE         |               |           |         |      |        |
| POLYETHYLENE |               |           |         |      |        |
| FIBERS,      |               |           |         |      |        |
| TEFLON       |               |           |         |      |        |
| FIBERS,      |               |           |         |      |        |
|              |               |           |         |      |        |
| PAPER        |               |           |         |      |        |
| FIBERS,      |               |           |         |      |        |
| METAL        |               |           |         |      |        |
| FLAKES, SOFI |               |           |         |      |        |
| AND BLACK    |               |           |         |      |        |
| TAPE. SEE    |               |           |         |      |        |
| ATTACHEMENT  |               |           |         |      |        |
| #1           |               |           |         |      |        |
|              |               |           |         |      |        |
| FOR DETAILS  |               |           |         |      |        |
|              |               |           |         |      |        |
| COMPARING    |               |           |         |      |        |
| THE LWT-24   |               |           |         |      |        |
| LH2          |               |           |         |      |        |
| PARTICLES    |               |           |         |      |        |
| GREATER THAN |               |           |         |      |        |
| 500 MICRONS  |               |           |         |      |        |
| TO THE       |               |           |         |      |        |
|              |               |           |         |      |        |
| LWT-11 LH2   |               |           |         |      |        |
| PARTICLE     |               |           |         |      |        |
| HISTORY      |               |           |         |      |        |
| GREATER THAN |               |           |         |      |        |
| 500 MICRONS, |               |           |         |      |        |
| THE LWT-11   |               |           |         |      |        |
|              |               |           |         |      |        |
| PARTICLE     |               |           |         |      |        |
| HISTORY IS   |               |           |         |      |        |
| A            |               |           |         |      |        |
| PPROXIMATELY |               |           |         |      |        |
| 252 TIMES    |               |           |         |      |        |
| LARGER PER   |               |           |         |      |        |
| SQUARE FOOT  |               |           |         |      |        |
|              |               |           |         |      |        |
| OF SURFACE   |               |           |         |      |        |
| AREA THAN    |               |           |         |      |        |
| LWT-24. (419 |               |           |         |      |        |
| PARTICLES    |               |           |         |      |        |
| OVER 15      |               |           |         |      |        |
| FT-SQUARE    |               |           |         |      |        |
| VERSUS       |               |           |         |      |        |
|              |               |           |         |      |        |
| 124          |               |           |         |      |        |
| PARTICLES    |               |           |         |      |        |
| OVER 1129    |               |           |         |      |        |
| FT-SQUARE)   |               |           |         |      |        |
|              |               |           |         |      |        |
| REVIEW OF    |               |           |         |      |        |
| THE LWT-24   |               |           |         |      |        |
| TANK BUILD   |               |           |         |      |        |
| HISTORY      |               |           |         |      |        |
| D            |               |           |         |      |        |
| OCUMENTATION |               |           |         |      |        |
| DETERMINED   |               |           |         |      |        |
| THAT         |               |           |         |      |        |
|              |               |           |         |      |        |
| SANDPAPER    |               |           |         |      |        |
| ENTERED THE  |               |           |         |      |        |
| TANK ONLY    |               |           |         |      |        |
| ONCE IN THE  |               |           |         |      |        |
| BUILD        |               |           |         |      |        |
| PROCESS. AT  |               |           |         |      |        |
| THE          |               |           |         |      |        |
|              |               |           |         |      |        |
| COMPLETION   |               |           |         |      |        |
| OF THE FINAL |               |           |         |      |        |
| TANK ENTRY   |               |           |         |      |        |
| BEFORE THE   |               |           |         |      |        |
| MANHOLE      |               |           |         |      |        |
| COVER        |               |           |         |      |        |
| INSTALLA-    |               |           |         |      |        |
|              |               |           |         |      |        |
| TION AND     |               |           |         |      |        |
| CLOSEOUT IN  |               |           |         |      |        |
| FINAL        |               |           |         |      |        |
| ASSEMBLY,    |               |           |         |      |        |
| TWO SMALL    |               |           |         |      |        |
| SCRATCHES    |               |           |         |      |        |
| WERE         |               |           |         |      |        |
| DETECTED     |               |           |         |      |        |
|              |               |           |         |      |        |
| ON THE TANK  |               |           |         |      |        |
| SKIN AT THE  |               |           |         |      |        |
| -Z AXIS. THE |               |           |         |      |        |
| SCRATCHES    |               |           |         |      |        |
| WERE         |               |           |         |      |        |
| DOCUMENTED   |               |           |         |      |        |
| AND          |               |           |         |      |        |
|              |               |           |         |      |        |
| REWORKED.    |               |           |         |      |        |
| SANDPAPER    |               |           |         |      |        |
| WAS CARRIED  |               |           |         |      |        |
| INTO THE     |               |           |         |      |        |
| TANK TO      |               |           |         |      |        |
| PERFORM THE  |               |           |         |      |        |
| REWORK       |               |           |         |      |        |
|              |               |           |         |      |        |
| AND THE      |               |           |         |      |        |
| SUBJECT      |               |           |         |      |        |
| PIECE OF     |               |           |         |      |        |
| SANDPAPER    |               |           |         |      |        |
| WAS          |               |           |         |      |        |
| I            |               |           |         |      |        |
| NADVERTANTLY |               |           |         |      |        |
| LEFT IN THE  |               |           |         |      |        |
| TANK         |               |           |         |      |        |
|              |               |           |         |      |        |
| THE TANK     |               |           |         |      |        |
| ENTRY        |               |           |         |      |        |
| CONTROLS     |               |           |         |      |        |
| INCLUDE A    |               |           |         |      |        |
| TANK ENTRY   |               |           |         |      |        |
| MONITOR AND  |               |           |         |      |        |
| TANK ENTRY   |               |           |         |      |        |
|              |               |           |         |      |        |
| LOG. THE     |               |           |         |      |        |
| TANK ENTRY   |               |           |         |      |        |
| LOG SHOWS    |               |           |         |      |        |
| THE SAME     |               |           |         |      |        |
| NUMBER OF    |               |           |         |      |        |
| SHEETS OF    |               |           |         |      |        |
| SANDPAPER    |               |           |         |      |        |
|              |               |           |         |      |        |
| LEAVING THE  |               |           |         |      |        |
| TANK AS      |               |           |         |      |        |
| ENTERED IT.  |               |           |         |      |        |
| APPARENTLY   |               |           |         |      |        |
| THE SUBJECT  |               |           |         |      |        |
| PIECE OF     |               |           |         |      |        |
|              |               |           |         |      |        |
| SANDPAPER    |               |           |         |      |        |
| WAS TORN     |               |           |         |      |        |
| FROM A SHEET |               |           |         |      |        |
| OF SANDPAPER |               |           |         |      |        |
| AND THE      |               |           |         |      |        |
| MISSING      |               |           |         |      |        |
| PIECE        |               |           |         |      |        |
|              |               |           |         |      |        |
| WAS NOT      |               |           |         |      |        |
| DETECTED     |               |           |         |      |        |
| DURING THE   |               |           |         |      |        |
| EXIT         |               |           |         |      |        |
| ACCOUNTING   |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK CLOSED  |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK II.     |               |           |         |      |        |
| CORRECTIVE   |               |           |         |      |        |
| ACTIONS      |               |           |         |      |        |
|              |               |           |         |      |        |
| A. REVIEW    |               |           |         |      |        |
| TANK ENTRY   |               |           |         |      |        |
| LOGS TO      |               |           |         |      |        |
| IDENTIFY THE |               |           |         |      |        |
| INSTANCES OF |               |           |         |      |        |
| SANDPAPER    |               |           |         |      |        |
| ENTRY        |               |           |         |      |        |
|              |               |           |         |      |        |
| ON EACH      |               |           |         |      |        |
| EXTERNAL     |               |           |         |      |        |
| TANK WHICH   |               |           |         |      |        |
| HAS BEEN     |               |           |         |      |        |
| THROUGH      |               |           |         |      |        |
| FINAL        |               |           |         |      |        |
| CLEANING     |               |           |         |      |        |
|              |               |           |         |      |        |
| B. REVISE    |               |           |         |      |        |
| TANK ENTRY   |               |           |         |      |        |
| LONG         |               |           |         |      |        |
| PROCEDURE    |               |           |         |      |        |
| FOR 100%     |               |           |         |      |        |
| AC           |               |           |         |      |        |
| COUNTABILITY |               |           |         |      |        |
| OF           |               |           |         |      |        |
|              |               |           |         |      |        |
| MATERIALS    |               |           |         |      |        |
| USED INSIDE  |               |           |         |      |        |
| EXTERNAL     |               |           |         |      |        |
| TANKS        |               |           |         |      |        |
|              |               |           |         |      |        |
| CLOSURE      |               |           |         |      |        |
| STATEMENT    |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK         |               |           |         |      |        |
| COMPLETE.    |               |           |         |      |        |
| REFERENCE    |               |           |         |      |        |
| PRODUCT      |               |           |         |      |        |
| ASSURANCE    |               |           |         |      |        |
| PROCEDURE    |               |           |         |      |        |
| 17.6.22      |               |           |         |      |        |
|              |               |           |         |      |        |
| REVISION 8   |               |           |         |      |        |
| AND TANK     |               |           |         |      |        |
| ENTRY LOG    |               |           |         |      |        |
| FORM NUMBER  |               |           |         |      |        |
| MAF/MMA      |               |           |         |      |        |
| 37-064       |               |           |         |      |        |
|              |               |           |         |      |        |
| C. EVALUATE  |               |           |         |      |        |
| ELIMINATING  |               |           |         |      |        |
| THE NEED TO  |               |           |         |      |        |
| CUT SAFETY   |               |           |         |      |        |
| WIRE WHILE   |               |           |         |      |        |
| INSIDE       |               |           |         |      |        |
|              |               |           |         |      |        |
| EXTERNAL     |               |           |         |      |        |
| TANK         |               |           |         |      |        |
|              |               |           |         |      |        |
| CLOSURE      |               |           |         |      |        |
| STATEMENT    |               |           |         |      |        |
|              |               |           |         |      |        |
| ACTION IS    |               |           |         |      |        |
| COMPLETE.    |               |           |         |      |        |
| REFERENCE    |               |           |         |      |        |
| MEMO         |               |           |         |      |        |
| 36           |               |           |         |      |        |
| 93-88-SC-020 |               |           |         |      |        |
|              |               |           |         |      |        |
| D. ISSUE A   |               |           |         |      |        |
| CREW TIP TO  |               |           |         |      |        |
| ALERT        |               |           |         |      |        |
| PERSONNEL TO |               |           |         |      |        |
| THE ADVERSE  |               |           |         |      |        |
| POTENTIAL OF |               |           |         |      |        |
|              |               |           |         |      |        |
| LESS THAN    |               |           |         |      |        |
| 100%         |               |           |         |      |        |
| AC           |               |           |         |      |        |
| COUNTABILITY |               |           |         |      |        |
| OF MATERIALS |               |           |         |      |        |
| ENTERING     |               |           |         |      |        |
| EXTERNAL     |               |           |         |      |        |
| TANKS        |               |           |         |      |        |
|              |               |           |         |      |        |
| CLOSURE      |               |           |         |      |        |
| STATEMENT    |               |           |         |      |        |
|              |               |           |         |      |        |
| ACTION IS    |               |           |         |      |        |
| COMPLETE.    |               |           |         |      |        |
| REFERENCE    |               |           |         |      |        |
| CREW TIP     |               |           |         |      |        |
| 87-018       |               |           |         |      |        |
|              |               |           |         |      |        |
| E. EVALUATE  |               |           |         |      |        |
| TRAINING     |               |           |         |      |        |
| REQUIREMENTS |               |           |         |      |        |
| AND IDENTIFY |               |           |         |      |        |
| ANY          |               |           |         |      |        |
| DEFICIENCIES |               |           |         |      |        |
|              |               |           |         |      |        |
| CLOSURE      |               |           |         |      |        |
| STATEMENT    |               |           |         |      |        |
|              |               |           |         |      |        |
| ACTION IS    |               |           |         |      |        |
| COMPLETE.    |               |           |         |      |        |
| REFERENCE    |               |           |         |      |        |
| MEMO         |               |           |         |      |        |
| 3720-88-001  |               |           |         |      |        |
| WHICH        |               |           |         |      |        |
| DIRECTS USE  |               |           |         |      |        |
|              |               |           |         |      |        |
| OF THE       |               |           |         |      |        |
| CORRECT      |               |           |         |      |        |
| PROCEDURE    |               |           |         |      |        |
| FOR TANK     |               |           |         |      |        |
| ENTRY        |               |           |         |      |        |
| CONTROL AND  |               |           |         |      |        |
| MONITORING   |               |           |         |      |        |
|              |               |           |         |      |        |
| F. EVALUATE  |               |           |         |      |        |
| CONTROLS FOR |               |           |         |      |        |
| ALL TYPES OF |               |           |         |      |        |
| MATERIALS    |               |           |         |      |        |
| TAKEN INSIDE |               |           |         |      |        |
| OF THE       |               |           |         |      |        |
|              |               |           |         |      |        |
| EXTERNAL     |               |           |         |      |        |
| TANKS        |               |           |         |      |        |
|              |               |           |         |      |        |
| ECD: 2/12/88 |               |           |         |      |        |
|              |               |           |         |      |        |
| G. EVALUATE  |               |           |         |      |        |
| PROPOSALS    |               |           |         |      |        |
| MADE BY AMT  |               |           |         |      |        |
| IN TASK      |               |           |         |      |        |
| II.C. MAKE   |               |           |         |      |        |
| SPECIFIC     |               |           |         |      |        |
|              |               |           |         |      |        |
| REC          |               |           |         |      |        |
| OMMENDATIONS |               |           |         |      |        |
| AS TO THE    |               |           |         |      |        |
| PROPOSAL TO  |               |           |         |      |        |
| ADOPT        |               |           |         |      |        |
|              |               |           |         |      |        |
| CLOSURE      |               |           |         |      |        |
| STATEMENT    |               |           |         |      |        |
|              |               |           |         |      |        |
| PI2012       |               |           |         |      |        |
| REVISED TO   |               |           |         |      |        |
| REQUIRE      |               |           |         |      |        |
| SAFETY WIRE  |               |           |         |      |        |
| TO BE HAND   |               |           |         |      |        |
| HELD WHEN    |               |           |         |      |        |
| CUT          |               |           |         |      |        |
|              |               |           |         |      |        |
| (REF. MEMO   |               |           |         |      |        |
| 36           |               |           |         |      |        |
| 93-88-SA-080 |               |           |         |      |        |
| AND          |               |           |         |      |        |
| 3513-88-010) |               |           |         |      |        |
|              |               |           |         |      |        |
| H.           |               |           |         |      |        |
| INCORPORATE  |               |           |         |      |        |
| AC           |               |           |         |      |        |
| COUNTABILITY |               |           |         |      |        |
| OF LIQUIDS   |               |           |         |      |        |
| INTO TANK    |               |           |         |      |        |
| ENTRY        |               |           |         |      |        |
| PROCEDURE    |               |           |         |      |        |
|              |               |           |         |      |        |
| CLOSURE      |               |           |         |      |        |
| STATEMENT    |               |           |         |      |        |
|              |               |           |         |      |        |
| LIQUID       |               |           |         |      |        |
| AC           |               |           |         |      |        |
| COUNTABILITY |               |           |         |      |        |
| CONTROLS     |               |           |         |      |        |
| IMPLEMENTED  |               |           |         |      |        |
| BY REVISION  |               |           |         |      |        |
| 9 OF P.A.P   |               |           |         |      |        |
|              |               |           |         |      |        |
| 17.6.22      |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK III.    |               |           |         |      |        |
| CLEARANCE OF |               |           |         |      |        |
| E            |               |           |         |      |        |
| FFECTIVITIES |               |           |         |      |        |
|              |               |           |         |      |        |
| RATIONALE    |               |           |         |      |        |
| FOR          |               |           |         |      |        |
| CLEARANCE OF |               |           |         |      |        |
| LH2 TANK     |               |           |         |      |        |
| (LWT-24):    |               |           |         |      |        |
|              |               |           |         |      |        |
| LWT-11 THRU  |               |           |         |      |        |
| 15 LH2 TANK  |               |           |         |      |        |
| PARTICULATE  |               |           |         |      |        |
| QUANTITIES   |               |           |         |      |        |
| WERE FOUND   |               |           |         |      |        |
| ACCEPTABLE   |               |           |         |      |        |
|              |               |           |         |      |        |
| TO           |               |           |         |      |        |
| ENGINEERING. |               |           |         |      |        |
| LWT-24 LH2   |               |           |         |      |        |
| TANK         |               |           |         |      |        |
| PARTICULATE  |               |           |         |      |        |
| IS SMALLER   |               |           |         |      |        |
| IN SIZE AND  |               |           |         |      |        |
|              |               |           |         |      |        |
| DISTRIBUTION |               |           |         |      |        |
| BY A FACTOR  |               |           |         |      |        |
| OF 252.      |               |           |         |      |        |
| THEREFORE,   |               |           |         |      |        |
| THE          |               |           |         |      |        |
| PARTICULATE  |               |           |         |      |        |
| FOUND        |               |           |         |      |        |
|              |               |           |         |      |        |
| IN THE       |               |           |         |      |        |
| LWT-24 LH2   |               |           |         |      |        |
| TANK IS      |               |           |         |      |        |
| CONSIDERED   |               |           |         |      |        |
| TO BE A      |               |           |         |      |        |
| NORMAL       |               |           |         |      |        |
| OCCURRENCE   |               |           |         |      |        |
|              |               |           |         |      |        |
| SINCE THE    |               |           |         |      |        |
| SANDPAPER    |               |           |         |      |        |
| ENTERED THE  |               |           |         |      |        |
| LH2 TANK     |               |           |         |      |        |
| THROUGH THE  |               |           |         |      |        |
| AFT DOME AND |               |           |         |      |        |
|              |               |           |         |      |        |
| ALL OF THE   |               |           |         |      |        |
| WORK         |               |           |         |      |        |
| OCCURRED ON  |               |           |         |      |        |
| THE AFT      |               |           |         |      |        |
| DOME, KSC    |               |           |         |      |        |
| INSPECTION   |               |           |         |      |        |
| WOULD HAVE   |               |           |         |      |        |
|              |               |           |         |      |        |
| DETECTED ALL |               |           |         |      |        |
| OF THE       |               |           |         |      |        |
| REMAINING    |               |           |         |      |        |
| SANDPAPER.   |               |           |         |      |        |
| BASED ON THE |               |           |         |      |        |
| ABOVE        |               |           |         |      |        |
| RATIONALE    |               |           |         |      |        |
|              |               |           |         |      |        |
| NO FURTHER   |               |           |         |      |        |
| ACTION IS    |               |           |         |      |        |
| REQUIRED     |               |           |         |      |        |
| INSIDE THE   |               |           |         |      |        |
| TANK         |               |           |         |      |        |
|              |               |           |         |      |        |
| RATIONALE    |               |           |         |      |        |
| FOR          |               |           |         |      |        |
| CLEARANCE OF |               |           |         |      |        |
| L02 TANK     |               |           |         |      |        |
| (LWT-24):    |               |           |         |      |        |
|              |               |           |         |      |        |
| THE L02 TANK |               |           |         |      |        |
| IS CLEANED   |               |           |         |      |        |
| PER PI 5009  |               |           |         |      |        |
| AND SAMPLED  |               |           |         |      |        |
| TO A CLEAN   |               |           |         |      |        |
| LEVEL OF     |               |           |         |      |        |
|              |               |           |         |      |        |
| 5.0 MG/SQ.   |               |           |         |      |        |
| FT. FOR      |               |           |         |      |        |
| NON-VOLATILE |               |           |         |      |        |
| RESIDUE AND  |               |           |         |      |        |
| 1000 MICRONS |               |           |         |      |        |
| FOR          |               |           |         |      |        |
|              |               |           |         |      |        |
| PARTICULATE. |               |           |         |      |        |
| THE TANK IS  |               |           |         |      |        |
| MAINTAINED   |               |           |         |      |        |
| CLEAN PER PI |               |           |         |      |        |
| 5011 AND ALL |               |           |         |      |        |
| TANK         |               |           |         |      |        |
|              |               |           |         |      |        |
| ENTRIES ARE  |               |           |         |      |        |
| MONITORED    |               |           |         |      |        |
| AND          |               |           |         |      |        |
| CONTROLLED   |               |           |         |      |        |
| PER PI 5011  |               |           |         |      |        |
| AND P.A.P.   |               |           |         |      |        |
| 17.6.22      |               |           |         |      |        |
|              |               |           |         |      |        |
| THE          |               |           |         |      |        |
| INCIDENCE OF |               |           |         |      |        |
| PARTICLE     |               |           |         |      |        |
| GENERATION   |               |           |         |      |        |
| IS REDUCED   |               |           |         |      |        |
| FOR THE L02  |               |           |         |      |        |
| TANK         |               |           |         |      |        |
|              |               |           |         |      |        |
| VERSUS THE   |               |           |         |      |        |
| LH2 TANK BY  |               |           |         |      |        |
| THE          |               |           |         |      |        |
| FOLLOWING    |               |           |         |      |        |
| REASONS:     |               |           |         |      |        |
|              |               |           |         |      |        |
| \- ALL       |               |           |         |      |        |
| TOOLING      |               |           |         |      |        |
| (INCLUDING   |               |           |         |      |        |
| HAND TOOLS)  |               |           |         |      |        |
| EQUIPMENT    |               |           |         |      |        |
| AND CLOTHING |               |           |         |      |        |
| USED         |               |           |         |      |        |
|              |               |           |         |      |        |
| IN TANK      |               |           |         |      |        |
| ENTRY ARE    |               |           |         |      |        |
| CLEANED TO A |               |           |         |      |        |
| VISUALLY     |               |           |         |      |        |
| CLEAN LEVEL  |               |           |         |      |        |
| BEFORE USE   |               |           |         |      |        |
|              |               |           |         |      |        |
| INSIDE THE   |               |           |         |      |        |
| TANK         |               |           |         |      |        |
|              |               |           |         |      |        |
| \- AFTER     |               |           |         |      |        |
| FINAL        |               |           |         |      |        |
| CLEANING IN  |               |           |         |      |        |
| CELL \"E\",  |               |           |         |      |        |
| NO LARGE     |               |           |         |      |        |
| INTERNAL     |               |           |         |      |        |
| ACCESS       |               |           |         |      |        |
|              |               |           |         |      |        |
| TOOLING IS   |               |           |         |      |        |
| USED FOR     |               |           |         |      |        |
| INTERNAL     |               |           |         |      |        |
| I            |               |           |         |      |        |
| NSTALLATIONS |               |           |         |      |        |
|              |               |           |         |      |        |
| \- NO ACCESS |               |           |         |      |        |
| TOOLING      |               |           |         |      |        |
| CONTACTS THE |               |           |         |      |        |
| L02 TANK     |               |           |         |      |        |
| INTERIOR     |               |           |         |      |        |
| DURING TANK  |               |           |         |      |        |
|              |               |           |         |      |        |
| ENTRY IN     |               |           |         |      |        |
| CELL \"E\"   |               |           |         |      |        |
| OR FINAL     |               |           |         |      |        |
| ASSEMBLY     |               |           |         |      |        |
|              |               |           |         |      |        |
| \- NO SLA IS |               |           |         |      |        |
| IN CLOSE     |               |           |         |      |        |
| PROXIMITY TO |               |           |         |      |        |
| THE ENTRY    |               |           |         |      |        |
| POINT OF THE |               |           |         |      |        |
| L02 TANK     |               |           |         |      |        |
|              |               |           |         |      |        |
| THE LH2 TANK |               |           |         |      |        |
| DOES HAVE    |               |           |         |      |        |
| SLA IN CLOSE |               |           |         |      |        |
| PROXIMITY TO |               |           |         |      |        |
| THE ENTRY    |               |           |         |      |        |
| POINT        |               |           |         |      |        |
|              |               |           |         |      |        |
| \- THE PURGE |               |           |         |      |        |
| AIR FLOW     |               |           |         |      |        |
| FROM THE L02 |               |           |         |      |        |
| TANK DURING  |               |           |         |      |        |
| TANK ENTRY   |               |           |         |      |        |
| IS GREATER   |               |           |         |      |        |
|              |               |           |         |      |        |
| THAN THE AIR |               |           |         |      |        |
| FLOW FROM    |               |           |         |      |        |
| THE LH2 TANK |               |           |         |      |        |
|              |               |           |         |      |        |
| ADDITIONAL   |               |           |         |      |        |
| INSPECTIONS  |               |           |         |      |        |
| ARE          |               |           |         |      |        |
| PERFORMED ON |               |           |         |      |        |
| THE L02 TANK |               |           |         |      |        |
| DOME AS      |               |           |         |      |        |
| FINAL        |               |           |         |      |        |
|              |               |           |         |      |        |
| TANK EGRESS  |               |           |         |      |        |
| IS MADE. A   |               |           |         |      |        |
| NON-VOLATILE |               |           |         |      |        |
| RESIDUE WIPE |               |           |         |      |        |
| TEST AND A   |               |           |         |      |        |
| BLACK        |               |           |         |      |        |
|              |               |           |         |      |        |
| LIGHT        |               |           |         |      |        |
| INSPECTION   |               |           |         |      |        |
| ARE          |               |           |         |      |        |
| CONDUCTED IN |               |           |         |      |        |
| THE AFT DOME |               |           |         |      |        |
| AREA         |               |           |         |      |        |
|              |               |           |         |      |        |
| BASED ON THE |               |           |         |      |        |
| ABOVE        |               |           |         |      |        |
| RATIONALE, A |               |           |         |      |        |
| TANK ENTRY   |               |           |         |      |        |
| INTO THE LOX |               |           |         |      |        |
| TANK AT KSC  |               |           |         |      |        |
|              |               |           |         |      |        |
| IS NOT       |               |           |         |      |        |
| REQUIRED     |               |           |         |      |        |
|              |               |           |         |      |        |
| RATIONALE    |               |           |         |      |        |
| FOR FLEET    |               |           |         |      |        |
| CLEARANCE -  |               |           |         |      |        |
| LH2 TANK:    |               |           |         |      |        |
|              |               |           |         |      |        |
| THE DEBRIS   |               |           |         |      |        |
| (EXCLUDING   |               |           |         |      |        |
| THE          |               |           |         |      |        |
| SANDPAPER)   |               |           |         |      |        |
| DISCOVERED   |               |           |         |      |        |
| INSIDE THE   |               |           |         |      |        |
| LWT-24 LH2   |               |           |         |      |        |
|              |               |           |         |      |        |
| TANK IS      |               |           |         |      |        |
| NORMAL AND   |               |           |         |      |        |
| IN           |               |           |         |      |        |
| SIGNIFICANT. |               |           |         |      |        |
| BOTH THE     |               |           |         |      |        |
| DEBRIS AND   |               |           |         |      |        |
| THE          |               |           |         |      |        |
| SANDPAPER    |               |           |         |      |        |
|              |               |           |         |      |        |
| WOULD POSE   |               |           |         |      |        |
| NO RISK FOR  |               |           |         |      |        |
| THE          |               |           |         |      |        |
| PROPELLANT   |               |           |         |      |        |
| SCREENS      |               |           |         |      |        |
| STRUCTURE    |               |           |         |      |        |
| AND FUNCTION |               |           |         |      |        |
|              |               |           |         |      |        |
| THE SCREENS  |               |           |         |      |        |
| ARE          |               |           |         |      |        |
| A            |               |           |         |      |        |
| PPROXIMATLEY |               |           |         |      |        |
| 2.5 TIMES    |               |           |         |      |        |
| LARGER IN    |               |           |         |      |        |
| SURFACE AREA |               |           |         |      |        |
| THAN         |               |           |         |      |        |
|              |               |           |         |      |        |
| REQUIRED FOR |               |           |         |      |        |
| THE          |               |           |         |      |        |
| PROPELLANT   |               |           |         |      |        |
| FLOW RATES.  |               |           |         |      |        |
| IN ADDITION, |               |           |         |      |        |
| THE SCREEN   |               |           |         |      |        |
| MESH         |               |           |         |      |        |
|              |               |           |         |      |        |
| IS SIZED TO  |               |           |         |      |        |
| PRECLUDE     |               |           |         |      |        |
| PARTICULATE  |               |           |         |      |        |
| LARGE ENOUGH |               |           |         |      |        |
| TO DAMAGE    |               |           |         |      |        |
| THE ENGINES  |               |           |         |      |        |
|              |               |           |         |      |        |
| FROM         |               |           |         |      |        |
| ENTERING THE |               |           |         |      |        |
| FEEDLINE     |               |           |         |      |        |
|              |               |           |         |      |        |
| RATIONALE    |               |           |         |      |        |
| FOR FLEET    |               |           |         |      |        |
| CLEARANCE -  |               |           |         |      |        |
| L02 TANK:    |               |           |         |      |        |
|              |               |           |         |      |        |
| THE SAME     |               |           |         |      |        |
| RATIONALE    |               |           |         |      |        |
| APPLIES FOR  |               |           |         |      |        |
| THE L02 TANK |               |           |         |      |        |
| AS FOR THE   |               |           |         |      |        |
| LH2 TANK     |               |           |         |      |        |
| PLUS         |               |           |         |      |        |
|              |               |           |         |      |        |
| THE L02 TANK |               |           |         |      |        |
| IS LESS      |               |           |         |      |        |
| SUSCEPTIBLE  |               |           |         |      |        |
| TO DEBRIS    |               |           |         |      |        |
| INGESTION AS |               |           |         |      |        |
| SHOWN IN THE |               |           |         |      |        |
|              |               |           |         |      |        |
| LWT-24 L02   |               |           |         |      |        |
| TANK         |               |           |         |      |        |
| DISCUSSION.  |               |           |         |      |        |
| IT WAS       |               |           |         |      |        |
| DETERMINED   |               |           |         |      |        |
| THUS FAR     |               |           |         |      |        |
| UNDER TASK   |               |           |         |      |        |
|              |               |           |         |      |        |
| II-A THAT    |               |           |         |      |        |
| SANDPAPER    |               |           |         |      |        |
| APPEARS ON   |               |           |         |      |        |
| THE TANK     |               |           |         |      |        |
| ENTRY LOGS   |               |           |         |      |        |
| OF LWTS-21   |               |           |         |      |        |
| AND 26       |               |           |         |      |        |
|              |               |           |         |      |        |
| RATIONALE    |               |           |         |      |        |
| FOR          |               |           |         |      |        |
| CLEARANCE OF |               |           |         |      |        |
| THESE        |               |           |         |      |        |
| E            |               |           |         |      |        |
| FFECTIVITIES |               |           |         |      |        |
| IS AS        |               |           |         |      |        |
| FOLLOWS:     |               |           |         |      |        |
|              |               |           |         |      |        |
| LWT - 26     |               |           |         |      |        |
|              |               |           |         |      |        |
| TANK ENTRY   |               |           |         |      |        |
| LOGS         |               |           |         |      |        |
| INDICATE     |               |           |         |      |        |
| THAT THE     |               |           |         |      |        |
| SANDPAPER    |               |           |         |      |        |
| WAS USED FOR |               |           |         |      |        |
| REWORK OF AN |               |           |         |      |        |
|              |               |           |         |      |        |
| IMPERFECTION |               |           |         |      |        |
| ON THE       |               |           |         |      |        |
| FORWARD      |               |           |         |      |        |
| OGIVE        |               |           |         |      |        |
| ELECTRICAL   |               |           |         |      |        |
| FEEDTHRU     |               |           |         |      |        |
| SEALING      |               |           |         |      |        |
| SURFACE      |               |           |         |      |        |
|              |               |           |         |      |        |
| THIS SEALING |               |           |         |      |        |
| SURFACE. THE |               |           |         |      |        |
| SEALING      |               |           |         |      |        |
| SURFACE IS   |               |           |         |      |        |
| LOCATED      |               |           |         |      |        |
| EXTERNAL OF  |               |           |         |      |        |
| THE          |               |           |         |      |        |
|              |               |           |         |      |        |
| L02 TANK. A  |               |           |         |      |        |
| CLEAN ROOM   |               |           |         |      |        |
| IS           |               |           |         |      |        |
| POSITIONED   |               |           |         |      |        |
| AROUND THE   |               |           |         |      |        |
| FORWARD      |               |           |         |      |        |
| OGIVE WHICH  |               |           |         |      |        |
|              |               |           |         |      |        |
| ENCOMPASSES  |               |           |         |      |        |
| THE LOCATION |               |           |         |      |        |
| OF THE       |               |           |         |      |        |
| SEALING      |               |           |         |      |        |
| SURFACE      |               |           |         |      |        |
| DEFECT. AS A |               |           |         |      |        |
| ROUTINE,     |               |           |         |      |        |
|              |               |           |         |      |        |
| THE TANK     |               |           |         |      |        |
| MONITOR LOGS |               |           |         |      |        |
| ALL          |               |           |         |      |        |
| MATERIALS    |               |           |         |      |        |
| ENTERING     |               |           |         |      |        |
| THIS CLEAN   |               |           |         |      |        |
| ROOM. THIS   |               |           |         |      |        |
| IS           |               |           |         |      |        |
|              |               |           |         |      |        |
| DUE TO THE   |               |           |         |      |        |
| FACT THAT    |               |           |         |      |        |
| THE MONITOR  |               |           |         |      |        |
| IS           |               |           |         |      |        |
| POSITIONED   |               |           |         |      |        |
| OUTSIDE THE  |               |           |         |      |        |
| CLEAN ROOM   |               |           |         |      |        |
|              |               |           |         |      |        |
| AND MUST USE |               |           |         |      |        |
| THE CLEAN    |               |           |         |      |        |
| ROOM         |               |           |         |      |        |
| THRESHOLD AS |               |           |         |      |        |
| THE POINT OF |               |           |         |      |        |
| AC           |               |           |         |      |        |
| COUNTABILITY |               |           |         |      |        |
|              |               |           |         |      |        |
| THE          |               |           |         |      |        |
| SANDPAPER IN |               |           |         |      |        |
| THIS CASE    |               |           |         |      |        |
| WAS NEVER    |               |           |         |      |        |
| PHYSICALLY   |               |           |         |      |        |
| TAKEN INSIDE |               |           |         |      |        |
| THE L02      |               |           |         |      |        |
|              |               |           |         |      |        |
| TANK         |               |           |         |      |        |
|              |               |           |         |      |        |
| LWT - 21     |               |           |         |      |        |
|              |               |           |         |      |        |
| THE LWT-21   |               |           |         |      |        |
| RECORDS      |               |           |         |      |        |
| INDICATE     |               |           |         |      |        |
| THAT RAISED  |               |           |         |      |        |
| METAL WAS    |               |           |         |      |        |
| DISCOVERED   |               |           |         |      |        |
| ON THE       |               |           |         |      |        |
|              |               |           |         |      |        |
| MANHOLE      |               |           |         |      |        |
| FITTING LIP  |               |           |         |      |        |
| AND ON THE   |               |           |         |      |        |
| TOP SIDE OF  |               |           |         |      |        |
| THE          |               |           |         |      |        |
| ANTI-VORTEX  |               |           |         |      |        |
| BAFFLE       |               |           |         |      |        |
| DURING       |               |           |         |      |        |
|              |               |           |         |      |        |
| SHAKEDOWN.   |               |           |         |      |        |
| THIS         |               |           |         |      |        |
| DISCOVERY    |               |           |         |      |        |
| WAS MADE     |               |           |         |      |        |
| AFTER ALL    |               |           |         |      |        |
| ELECTRICAL   |               |           |         |      |        |
| I            |               |           |         |      |        |
| NSTALLATIONS |               |           |         |      |        |
|              |               |           |         |      |        |
| HAD BEEN     |               |           |         |      |        |
| COMPLETED    |               |           |         |      |        |
| AND          |               |           |         |      |        |
| INSTALLATION |               |           |         |      |        |
| OF THE       |               |           |         |      |        |
| SCREENS HAD  |               |           |         |      |        |
| BEEN         |               |           |         |      |        |
|              |               |           |         |      |        |
| A            |               |           |         |      |        |
| CCOMPLISHED. |               |           |         |      |        |
| THIS         |               |           |         |      |        |
| ACTIVITY IS  |               |           |         |      |        |
| ACCOMPLISHED |               |           |         |      |        |
| IMMEDIATELY  |               |           |         |      |        |
| AFTER THE    |               |           |         |      |        |
| TANK         |               |           |         |      |        |
|              |               |           |         |      |        |
| HAS BEEN     |               |           |         |      |        |
| INTERNALLY   |               |           |         |      |        |
| CLEANED IN   |               |           |         |      |        |
| CELL E. TO   |               |           |         |      |        |
| REMOVE THE   |               |           |         |      |        |
| RAISED       |               |           |         |      |        |
| METAL, TANK  |               |           |         |      |        |
|              |               |           |         |      |        |
| ENTRY        |               |           |         |      |        |
| RECORDS      |               |           |         |      |        |
| INDICATE     |               |           |         |      |        |
| THAT ONE     |               |           |         |      |        |
| PIECE OF     |               |           |         |      |        |
| SANDPAPER    |               |           |         |      |        |
| (600 GRIT)   |               |           |         |      |        |
| AND OTHER    |               |           |         |      |        |
|              |               |           |         |      |        |
| RELATED      |               |           |         |      |        |
| MATERIALS    |               |           |         |      |        |
| SUCH AS AN   |               |           |         |      |        |
| OPTICAL      |               |           |         |      |        |
| MICROMETER,  |               |           |         |      |        |
| 6\" SCALE,   |               |           |         |      |        |
| P. H. PAPER, |               |           |         |      |        |
|              |               |           |         |      |        |
| IRRIDITE,    |               |           |         |      |        |
| CLEAN CLOTH  |               |           |         |      |        |
| AND D.M.     |               |           |         |      |        |
| WATER,       |               |           |         |      |        |
| ENTERED AND  |               |           |         |      |        |
| EXITED THE   |               |           |         |      |        |
| TANK. ALL    |               |           |         |      |        |
|              |               |           |         |      |        |
| MATERIAL BY  |               |           |         |      |        |
| COUNT WAS    |               |           |         |      |        |
| ACCOUNTED    |               |           |         |      |        |
| FOR IN THE   |               |           |         |      |        |
| TANK ENTRY   |               |           |         |      |        |
| RECORDS      |               |           |         |      |        |
|              |               |           |         |      |        |
| LITTLE       |               |           |         |      |        |
| COMPARISON   |               |           |         |      |        |
| CAN BE MADE  |               |           |         |      |        |
| RELATIVE TO  |               |           |         |      |        |
| THE INTERNAL |               |           |         |      |        |
| CO           |               |           |         |      |        |
| NFIGURATIONS |               |           |         |      |        |
|              |               |           |         |      |        |
| OF THE L02   |               |           |         |      |        |
| VS. LH2      |               |           |         |      |        |
| TANK. THE    |               |           |         |      |        |
| LH2 TANK HAS |               |           |         |      |        |
| MANY FAYING  |               |           |         |      |        |
| SURFACES,    |               |           |         |      |        |
|              |               |           |         |      |        |
| STRINGERS,   |               |           |         |      |        |
| AND OTHER    |               |           |         |      |        |
| INTERNAL     |               |           |         |      |        |
| I            |               |           |         |      |        |
| NSTALLATIONS |               |           |         |      |        |
| WHICH        |               |           |         |      |        |
| REQUIRE VERY |               |           |         |      |        |
| CLOSE        |               |           |         |      |        |
|              |               |           |         |      |        |
| VISUAL       |               |           |         |      |        |
| SCRUTINY     |               |           |         |      |        |
| DURING FINAL |               |           |         |      |        |
| SHAKEDOWN TO |               |           |         |      |        |
| DETECT ALL   |               |           |         |      |        |
| FOREIGN      |               |           |         |      |        |
| OBJECTS      |               |           |         |      |        |
|              |               |           |         |      |        |
| THE L02 TANK |               |           |         |      |        |
| OFFERS NO    |               |           |         |      |        |
| VISUAL       |               |           |         |      |        |
| OBSTRUCTIONS |               |           |         |      |        |
| AND          |               |           |         |      |        |
| ENTRAPMENT   |               |           |         |      |        |
| AREAS        |               |           |         |      |        |
|              |               |           |         |      |        |
| FORWARD AND  |               |           |         |      |        |
| AFT OF THE   |               |           |         |      |        |
| SLOSH        |               |           |         |      |        |
| BAFFLES.     |               |           |         |      |        |
| EVEN THOUGH  |               |           |         |      |        |
| THE          |               |           |         |      |        |
| ANTI-VORTEX  |               |           |         |      |        |
|              |               |           |         |      |        |
| BAFFLES AND  |               |           |         |      |        |
| PROPELLENT   |               |           |         |      |        |
| SCREENS ARE  |               |           |         |      |        |
| LOCATED IN   |               |           |         |      |        |
| THE +Z AXIS, |               |           |         |      |        |
| THEY ARE     |               |           |         |      |        |
|              |               |           |         |      |        |
| VERY         |               |           |         |      |        |
| INSPECTABLE  |               |           |         |      |        |
| AND HAVE NO  |               |           |         |      |        |
| ENTRAPMENT   |               |           |         |      |        |
| AREAS FOR    |               |           |         |      |        |
| FOREIGN      |               |           |         |      |        |
| OBJECTS      |               |           |         |      |        |
|              |               |           |         |      |        |
| SINCE THE    |               |           |         |      |        |
| L02 TANK HAS |               |           |         |      |        |
| A SMOOTH     |               |           |         |      |        |
| SKIN, ANY    |               |           |         |      |        |
| FOREIGN      |               |           |         |      |        |
| MATERIAL     |               |           |         |      |        |
| WOULD        |               |           |         |      |        |
|              |               |           |         |      |        |
| MIGRATE TO   |               |           |         |      |        |
| THE LOWEST   |               |           |         |      |        |
| POINT WITHIN |               |           |         |      |        |
| THE TANK     |               |           |         |      |        |
|              |               |           |         |      |        |
| IN           |               |           |         |      |        |
| FURTHERANCE  |               |           |         |      |        |
| OF THIS      |               |           |         |      |        |
| IN           |               |           |         |      |        |
| VESTIGATION, |               |           |         |      |        |
| THE          |               |           |         |      |        |
| TECHNICIAN   |               |           |         |      |        |
| AND ONE OF   |               |           |         |      |        |
| THE          |               |           |         |      |        |
|              |               |           |         |      |        |
| TANK ENTRY   |               |           |         |      |        |
| MONITORS     |               |           |         |      |        |
| WERE         |               |           |         |      |        |
| INTERVIEWED  |               |           |         |      |        |
| RELATIVE TO  |               |           |         |      |        |
| THE NORMAL   |               |           |         |      |        |
| PRACTICES    |               |           |         |      |        |
|              |               |           |         |      |        |
| AND          |               |           |         |      |        |
| PROCEDURES   |               |           |         |      |        |
| RELATING TO  |               |           |         |      |        |
| CELL E       |               |           |         |      |        |
| ACTIVITIES.  |               |           |         |      |        |
| IT WAS       |               |           |         |      |        |
| RELATED BY   |               |           |         |      |        |
| THEM         |               |           |         |      |        |
|              |               |           |         |      |        |
| THAT A       |               |           |         |      |        |
| MINIMUM      |               |           |         |      |        |
| AMOUNT OF    |               |           |         |      |        |
| MATERIAL IS  |               |           |         |      |        |
| TRANSPORTED  |               |           |         |      |        |
| INTO THE     |               |           |         |      |        |
| CLEAN TANK   |               |           |         |      |        |
|              |               |           |         |      |        |
| TO PERFORM   |               |           |         |      |        |
| ANY WORK. IN |               |           |         |      |        |
| A TYPICAL    |               |           |         |      |        |
| CASE OF      |               |           |         |      |        |
| SANDPAPER,   |               |           |         |      |        |
| THE          |               |           |         |      |        |
| TECHNICIAN   |               |           |         |      |        |
|              |               |           |         |      |        |
| WHO WORKED   |               |           |         |      |        |
| LWT-21       |               |           |         |      |        |
| RELATED THAT |               |           |         |      |        |
| AN           |               |           |         |      |        |
| ASSESSMENT   |               |           |         |      |        |
| WOULD BE     |               |           |         |      |        |
| MADE         |               |           |         |      |        |
| RELATIVE     |               |           |         |      |        |
|              |               |           |         |      |        |
| TO THE       |               |           |         |      |        |
| AMOUNT OF    |               |           |         |      |        |
| RAISED METAL |               |           |         |      |        |
| TO BE        |               |           |         |      |        |
| REMOVED. HE  |               |           |         |      |        |
| WOULD THEN   |               |           |         |      |        |
| EXIT THE     |               |           |         |      |        |
|              |               |           |         |      |        |
| TANK AND CUT |               |           |         |      |        |
| ONLY THE     |               |           |         |      |        |
| SMALL        |               |           |         |      |        |
| QUANTITY OF  |               |           |         |      |        |
| PAPER        |               |           |         |      |        |
| REQUIRED TO  |               |           |         |      |        |
| REMOVE THE   |               |           |         |      |        |
|              |               |           |         |      |        |
| I            |               |           |         |      |        |
| MPERFECTION. |               |           |         |      |        |
| AT NO TIME   |               |           |         |      |        |
| WOULD HE     |               |           |         |      |        |
| TEAR OR CUT  |               |           |         |      |        |
| SANDPAPER IN |               |           |         |      |        |
| THE TANK     |               |           |         |      |        |
|              |               |           |         |      |        |
| THIS         |               |           |         |      |        |
| OBSERVATION  |               |           |         |      |        |
| WAS          |               |           |         |      |        |
| CONFIRMED BY |               |           |         |      |        |
| THE TANK     |               |           |         |      |        |
| MONITOR.     |               |           |         |      |        |
| CELL E       |               |           |         |      |        |
| ACTIVITIES   |               |           |         |      |        |
|              |               |           |         |      |        |
| ARE          |               |           |         |      |        |
| ROUTINELY    |               |           |         |      |        |
| PERFORMED BY |               |           |         |      |        |
| AN           |               |           |         |      |        |
| EXPERIENCED  |               |           |         |      |        |
| AND          |               |           |         |      |        |
| DEDICATED    |               |           |         |      |        |
| CREW. IN     |               |           |         |      |        |
| THIS         |               |           |         |      |        |
|              |               |           |         |      |        |
| SPECIFIC     |               |           |         |      |        |
| CASE,        |               |           |         |      |        |
| RECORDS      |               |           |         |      |        |
| INDICATE A   |               |           |         |      |        |
| SECOND       |               |           |         |      |        |
| SHAKEDOWN    |               |           |         |      |        |
| WAS MADE BY  |               |           |         |      |        |
| QUALITY      |               |           |         |      |        |
|              |               |           |         |      |        |
| AND DCAS TO  |               |           |         |      |        |
| ASCERTAIN A  |               |           |         |      |        |
| CLEAN        |               |           |         |      |        |
| SYSTEM. EVEN |               |           |         |      |        |
| THOUGH THE   |               |           |         |      |        |
| DCAS         |               |           |         |      |        |
| INSPECTOR    |               |           |         |      |        |
|              |               |           |         |      |        |
| DOES NOT     |               |           |         |      |        |
| REMEMBER     |               |           |         |      |        |
| SPECIFICS    |               |           |         |      |        |
| RELATING TO  |               |           |         |      |        |
| LWT-21, AS A |               |           |         |      |        |
| RULE A VERY  |               |           |         |      |        |
|              |               |           |         |      |        |
| THOROUGH     |               |           |         |      |        |
| INSPECTION   |               |           |         |      |        |
| IS MADE OF   |               |           |         |      |        |
| THE AFT DOME |               |           |         |      |        |
| AREA. NO     |               |           |         |      |        |
| FURTHER TANK |               |           |         |      |        |
|              |               |           |         |      |        |
| ENTRIES WERE |               |           |         |      |        |
| MADE UNTIL   |               |           |         |      |        |
| THE TANK WAS |               |           |         |      |        |
| IN FINAL     |               |           |         |      |        |
| ASSEMBLY     |               |           |         |      |        |
|              |               |           |         |      |        |
| IN FINAL     |               |           |         |      |        |
| ASSEMBLY, A  |               |           |         |      |        |
| REQUIREMENT  |               |           |         |      |        |
| EXISTS IN    |               |           |         |      |        |
| THE PLANNING |               |           |         |      |        |
| PAPER WHICH  |               |           |         |      |        |
|              |               |           |         |      |        |
| REQUIRED     |               |           |         |      |        |
| THAT THE AFT |               |           |         |      |        |
| MANHOLE      |               |           |         |      |        |
| TOOLING      |               |           |         |      |        |
| COVER BE     |               |           |         |      |        |
| REMOVED A    |               |           |         |      |        |
| BLACK LIGHT  |               |           |         |      |        |
|              |               |           |         |      |        |
| INSPECTION   |               |           |         |      |        |
| BE PERFORMED |               |           |         |      |        |
| FOR          |               |           |         |      |        |
| DETECTION OF |               |           |         |      |        |
| H            |               |           |         |      |        |
| YDROCARBONS. |               |           |         |      |        |
| RECORDS      |               |           |         |      |        |
| INDICATE     |               |           |         |      |        |
|              |               |           |         |      |        |
| THAT         |               |           |         |      |        |
| SCATTERED    |               |           |         |      |        |
| HYDROCARBON  |               |           |         |      |        |
| INDICATIONS  |               |           |         |      |        |
| WERE PERSENT |               |           |         |      |        |
| ADJACENT TO  |               |           |         |      |        |
| THE          |               |           |         |      |        |
|              |               |           |         |      |        |
| MANHOLE      |               |           |         |      |        |
| COVER AND    |               |           |         |      |        |
| MARS T-78269 |               |           |         |      |        |
| WAS WRITTEN. |               |           |         |      |        |
| THROUGH THE  |               |           |         |      |        |
| REPEATED     |               |           |         |      |        |
|              |               |           |         |      |        |
| ATTEMPTS TO  |               |           |         |      |        |
| REMOVE THE   |               |           |         |      |        |
| C            |               |           |         |      |        |
| ONTAMINATION |               |           |         |      |        |
| STARTING     |               |           |         |      |        |
| WITH FREON   |               |           |         |      |        |
| PCA AND      |               |           |         |      |        |
|              |               |           |         |      |        |
| FINISHING    |               |           |         |      |        |
| WITH MEK,    |               |           |         |      |        |
| THE -Z PART  |               |           |         |      |        |
| OF THE DOME  |               |           |         |      |        |
| WOULD HAVE   |               |           |         |      |        |
| BEEN         |               |           |         |      |        |
| REPEATEDLY   |               |           |         |      |        |
|              |               |           |         |      |        |
| OBSERVED.    |               |           |         |      |        |
| WITH THE     |               |           |         |      |        |
| LIGHTS USED  |               |           |         |      |        |
| IN           |               |           |         |      |        |
| CONJUNCTION  |               |           |         |      |        |
| WITH THIS    |               |           |         |      |        |
| ACTIVITY,    |               |           |         |      |        |
|              |               |           |         |      |        |
| IF ANY       |               |           |         |      |        |
| SANDPAPER    |               |           |         |      |        |
| WERE IN THE  |               |           |         |      |        |
| AREA OF THE  |               |           |         |      |        |
| AFT DOME, IT |               |           |         |      |        |
| WOULD BE     |               |           |         |      |        |
| VISUALLY     |               |           |         |      |        |
|              |               |           |         |      |        |
| DETECTABLE.  |               |           |         |      |        |
| FURTHERMORE, |               |           |         |      |        |
| THE REPEATED |               |           |         |      |        |
| BLACK LIGHT  |               |           |         |      |        |
| INSPECTIONS  |               |           |         |      |        |
| WOULD        |               |           |         |      |        |
|              |               |           |         |      |        |
| HAVE         |               |           |         |      |        |
| DETECTED AN  |               |           |         |      |        |
| SANDPAPER ON |               |           |         |      |        |
| THE BOTTOM   |               |           |         |      |        |
| (-Z) OF THE  |               |           |         |      |        |
| DOME         |               |           |         |      |        |
|              |               |           |         |      |        |
| BASED UPON   |               |           |         |      |        |
| THE          |               |           |         |      |        |
| RATIONALE    |               |           |         |      |        |
| PRESENTED    |               |           |         |      |        |
| HEREIN,      |               |           |         |      |        |
| THERE IS NO  |               |           |         |      |        |
| REASON TO    |               |           |         |      |        |
|              |               |           |         |      |        |
| BELIEVE THAT |               |           |         |      |        |
| ANYTHING WAS |               |           |         |      |        |
| LEFT IN      |               |           |         |      |        |
| LWT-21 L02   |               |           |         |      |        |
| TANK         |               |           |         |      |        |
|              |               |           |         |      |        |
| TASK IV.     |               |           |         |      |        |
| CAPS         |               |           |         |      |        |
| CLOSEOUT     |               |           |         |      |        |
| SUMMARY      |               |           |         |      |        |
|              |               |           |         |      |        |
| AS A RESULT  |               |           |         |      |        |
| OF           |               |           |         |      |        |
| PARTICULATE  |               |           |         |      |        |
| INCLUDING A  |               |           |         |      |        |
| PIECE OF     |               |           |         |      |        |
| SANDPAPER    |               |           |         |      |        |
| 2\"X3\"      |               |           |         |      |        |
|              |               |           |         |      |        |
| OBSERVED     |               |           |         |      |        |
| INSIDE OF    |               |           |         |      |        |
| LWT-24 LH2   |               |           |         |      |        |
| TANK AT KSC, |               |           |         |      |        |
| A COMPLETE   |               |           |         |      |        |
| REVIEW OF    |               |           |         |      |        |
|              |               |           |         |      |        |
| OTHER TANKS  |               |           |         |      |        |
| WAS          |               |           |         |      |        |
| PERFORMED    |               |           |         |      |        |
| AND          |               |           |         |      |        |
| PROCEDURAL   |               |           |         |      |        |
| ENHANCEMENTS |               |           |         |      |        |
| WERE         |               |           |         |      |        |
| IMPLEMENTED  |               |           |         |      |        |
|              |               |           |         |      |        |
| TO PREVENT A |               |           |         |      |        |
| RECURRENCE   |               |           |         |      |        |
| OF THE       |               |           |         |      |        |
| PROBLEM      |               |           |         |      |        |
|              |               |           |         |      |        |
| IN REVIEWING |               |           |         |      |        |
| ALL TANK     |               |           |         |      |        |
| ENTRY        |               |           |         |      |        |
| RECORDS ON   |               |           |         |      |        |
| LWT-16       |               |           |         |      |        |
| THROUGH      |               |           |         |      |        |
| LWT-45, WITH |               |           |         |      |        |
|              |               |           |         |      |        |
| SPECIFIC     |               |           |         |      |        |
| EMPHASIS ON  |               |           |         |      |        |
| PAPER USED   |               |           |         |      |        |
| INSIDE OF    |               |           |         |      |        |
| L02 TANKS,   |               |           |         |      |        |
| SANDPAPER    |               |           |         |      |        |
| ENTERED      |               |           |         |      |        |
|              |               |           |         |      |        |
| LWTS 21, 43, |               |           |         |      |        |
| 44 AND 45.   |               |           |         |      |        |
| SINCE THE    |               |           |         |      |        |
| TANKS ARE    |               |           |         |      |        |
| BLACK        |               |           |         |      |        |
| LIGHTED IN   |               |           |         |      |        |
| FINAL        |               |           |         |      |        |
|              |               |           |         |      |        |
| ASSEMBLY,    |               |           |         |      |        |
| ANYTHING     |               |           |         |      |        |
| LEFT INSIDE  |               |           |         |      |        |
| OF A TANK    |               |           |         |      |        |
| WOULD BE     |               |           |         |      |        |
| DETECTED     |               |           |         |      |        |
|              |               |           |         |      |        |
| PROCEDURES,  |               |           |         |      |        |
| PROCESS      |               |           |         |      |        |
| INSTRUCTIONS |               |           |         |      |        |
| AND TRAINING |               |           |         |      |        |
| WERE         |               |           |         |      |        |
| REVIEWED AND |               |           |         |      |        |
| REVISED      |               |           |         |      |        |
|              |               |           |         |      |        |
| AS DEEMED    |               |           |         |      |        |
| NECESSARY TO |               |           |         |      |        |
| ENHANCE      |               |           |         |      |        |
| CONTROLS OF  |               |           |         |      |        |
| MATERIALS    |               |           |         |      |        |
| ENTERING THE |               |           |         |      |        |
|              |               |           |         |      |        |
| TANKS DURING |               |           |         |      |        |
| PROCESSING.  |               |           |         |      |        |
| A            |               |           |         |      |        |
| DDITIONALLY, |               |           |         |      |        |
| A CREW TIP   |               |           |         |      |        |
| WAS RELEASED |               |           |         |      |        |
| TO           |               |           |         |      |        |
|              |               |           |         |      |        |
| ADVISE       |               |           |         |      |        |
| PERSONNEL OF |               |           |         |      |        |
| THE ADVERSE  |               |           |         |      |        |
| POTENTIAL OF |               |           |         |      |        |
| LESS THAN    |               |           |         |      |        |
| 100%         |               |           |         |      |        |
|              |               |           |         |      |        |
| AC           |               |           |         |      |        |
| COUNTABILITY |               |           |         |      |        |
| OF MATERIALS |               |           |         |      |        |
| ENTERING     |               |           |         |      |        |
| TANKS        |               |           |         |      |        |
|              |               |           |         |      |        |
| ALL ACTIONS  |               |           |         |      |        |
| REQUIRED OF  |               |           |         |      |        |
| THIS CAPS    |               |           |         |      |        |
| ARE          |               |           |         |      |        |
| COMPLETE.    |               |           |         |      |        |
| THEREFORE    |               |           |         |      |        |
| THIS CAPS    |               |           |         |      |        |
|              |               |           |         |      |        |
| IS CLOSED    |               |           |         |      |        |
|              |               |           |         |      |        |
| THIS PROBLEM |               |           |         |      |        |
| CLOSURE IS   |               |           |         |      |        |
| SUBMITTED TO |               |           |         |      |        |
| MSFC FOR     |               |           |         |      |        |
| CLOSURE      |               |           |         |      |        |
| REVIEW AND   |               |           |         |      |        |
|              |               |           |         |      |        |
| APPROVAL     |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+
| **MSFC       |               |           |         |      |        |
| Response/C   |               |           |         |      |        |
| oncurrence** |               |           |         |      |        |
+--------------+---------------+-----------+---------+------+--------+

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

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

  ----------------- ----------------- ---------------- ----------- ----------- ------------
  **MSFC Report#**\ **IFA#**\         **Contractor     **JSC#**\   **KSC#**\   **EICN#**\
  A11139            \--               RPT#**\          \--         \--         \--
                                      P-060                                    

  **Asmnt Part#**\  **Asmnt Part      **Asmnt                                  
  80901010000-070   Name**\           Serial/Lot#**\                           
                    LH2 TANK          24                                       

  **HCRIT CD**\     **FCRIT CD**\     **CAUSE CD**\    **FAIL                  
  \--               3                 ES - EI-SHIP     MODE**\                 
                                                       UC - UNSAT              

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

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

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

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

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

  **MAJOR DESIGN                                                               
  CHANGES**                                                                    

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

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