JAMES WEBB SPACE TELESCOPE (JWST) ELECTRICAL CABLE PROTECTION NESC ACTIVITY 07-062-E INTRODUCTION/BACKGROUN…

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JAMES WEBB SPACE TELESCOPE (JWST) ELECTRICAL CABLE PROTECTION NESC ACTIVITY 07-062-E INTRODUCTION/BACKGROUND: THE TESTING DESCRIBED BY THIS STATEMENT OF WORK (SOW) IS IN SUPPORT OF A RISK ASSESSMENT COMMISSIONED BY THE NASA ENGINEERING AND SAFETY CENTER (NESC). THE DESCRIBED FAILURE ANALYSES SHALL BE PERFORMED ON METEOROID IMPACT SITES IN SIX RIBBON CABLE HARNESS SEGMENTS SUPPLIED BY THE NESC. THIS DEVICE TYPE IS USED IN THE JAMES WEBB SPACE TELESCOPE. TESTING SHALL BE PERFORMED IN A MANNER SIMILAR TO THAT PERFORMED IN FEBRUARY, 2008 FOR THE NESC BY THE CONTRACTOR. DESCRIPTION OF TASKS TO BE PERFORMED: THE CONTRACTOR SHALL PROVIDE THE NECESSARY MANPOWER AND EXPERTISE TO PERFORM THE FOLLOWING: MULTIPLE DAMAGE SITES SHALL BE INSPECTED AND ANALYZED BY THE CONTRACTOR, ON EACH OF 5 HARNESS SEGMENTS, CREATED BY HYPERVELOCITY METEOROID IMPACTS OF SINGLE PROJECTILES FRAGMENTED BY AN EXTERNAL METEOROID SHIELD. THE CONTRACTOR SHALL PROVIDE THE FOLLOWING INSPECTION AND ANALYSIS: 1. PERFORM OVERALL OPTICAL AND MAJOR SURFACE DAMAGE AREA(S) SCANNING ELECTRON MICROSCOPE (SEM) STUDIES OF DAMAGE SITES SELECTED IN ITEM 4 BELOW. 2. ASSESS THE CONDITION OF THE HARNESS SEGMENT ELECTRICAL SHIELD AND THE SHIELD RELATIVE DISTANCE TO EXPOSED WIRES AT MAJOR IMPACT SITE(S) E.G. BY FEIN FOCUS X-RAY. (QUANTIFY THE THREAT OF SHIELD SHORTING TO WIRE) 3. ASSESS THE CONDITION OF THE WIRE AT MAJOR IMPACT SITE(S), (QUANTIFY THE RISK OF SEVERED WIRE) 4. PHOTOGRAPH A TOTAL OF FIVE MAJOR IMPACT SITE DAMAGES (NO MORE THAN TWO ON ANY ONE SAMPLE) BY SECTIONING TO ASSESS THE DEPTH OF PENETRATION AND DAMAGE FOR THE ONE THROUGH SHOT HARNESS SEGMENT, THE CONTRACTOR SHALL PROVIDE THE FOLLOWING INFORMATION: 1. DOCUMENT THE CONDITION OF THE ELECTRICAL SHIELD AT THE IMPACT SITE (DOES THE ELECTRICAL SHIELD DEFORMATION OUTWARD OR INWARD TOWARDS THE WIRES AS A RESULT OF THE HYPERVELOCITY IMPACT) AND THE CONDITION OF THE WIRES. DELIVERABLES: FAILURE ANALYSIS REPORTS FOR THE METEOROID IMPACT SITES IN THE HARNESS SEGMENTS AS DESCRIBED, DUE NO LATER THAN APRIL 4, 2008 OR TWO WEEKS AFTER RECEIPT OF THE HARNESS FOR TESTING. DELIVERABLES ADDRESS: A. THE FAILURE ANALYSIS REPORT DELIVERABLE SHALL BE SENT VIA EMAIL TO THE FOLLOWING: MITCHELL DAVIS PHONE: (301) 286-4114 EMAIL: MITCHELL.L.DAVIS@NASA.GOV COMPATIBILITY/READABILITY ISSUES SHALL BE WORKED OUT IN ADVANCE BY BOTH PARTIES (I.E., THE CONTRACTOR AND THE GOVERNMENT) B. THE HARNESSES SHALL BE RETURNED TO THE GOVERNMENT AT THE FOLLOWING ADDRESS: MITCHELL DAVIS NASA GODDARD SPACE FLIGHT CENTER MAIL CODE 565 BUILDING 20 GREENBELT, MD 20771 PERIOD OF PERFORMANCE: PERIOD OF PERFORMANCE SHALL BE 2 WEEKS, COMMENCING UPON THE RECEIPT OF THE TEST ARTICLES ON MARCH 24, 2008 AND COMPLETING ON APRIL 4, 2008 WITH THE DELIVERY OF THE FAILURE ANALYSIS REPORT. ITEMS TO BE FURNISHED BY GOVERNMENT: SIX HARNESS SEGMENTS WITH METEOROID IMPACT SITES WILL BE PROVIDED, FIVE WITH MULTIPLE PROJECTILE FRAGMENT IMPACT SITES AND ONE WITH A SINGLE PROJECTILE THROUGH SHOT. THESE HARNESSES WILL BE SHIPPED TO HI-REL LABORATORIES IN ELECTROSTATIC PROTECTIVE PACKAGING IMMEDIATELY UPON AWARD OF THE PURCHASE ORDER. THE HARNESSES SHALL BE RETURNED TO THE GOVERNMENT UPON COMPLETION OF THE TESTING.