1. 1 GLAST LAT ProjectMechanical Systems Mechanical Systems Mechanical / Thermal Hardware July 2005 Status Marc Campell, Subsystem Manager

2. 2 GLAST LAT ProjectMechanical Systems SLAC Status

3. 3 GLAST LAT ProjectMechanical Systems Grid Qual Static Load Test Hardware –Grid Box assembly is 99% complete –All GSFC and Spectrum provided hardware is on hand Pre-Test (SLAC activities) –Test Interface Plate (TIP) Assembly delayed due to personnel conflicts with ACD operations – in work now –Need to return Spectrums Interface plate by mid-Sept. –Shipping container for Grid 2 on TIP due 9/7/05 Test (NTS activity) –Component flexure test required to proof load flexures prior to integration with the Flight LAT on the Test Interface Plate has been added to NTS SOW Test performed on TIP assembly prior to SLT Flexure strain gages also characterized for LAT sine vibe testing –NTS has evaluated final load cases and additional test above and submitted delta cost proposal (+$XXK) which is still within original budget

4. 4 GLAST LAT ProjectMechanical Systems Grid Qual Static Load Test Schedule

5. 5 GLAST LAT ProjectMechanical Systems Drawing Release Plan 66 of 73 (90%) drawings released –3 MLI drawings (in work) –4 unreleased parts not needed until Radiator fit check Known drawing revisions

6. 6 GLAST LAT ProjectMechanical Systems Concerns Lockheed Martin - Radiator delivery schedule –See LM presentation Completion of Grid Thermal Control System hardware installation delay until Sep 05. –Will try to perform on a non-interference basis, but may impact LAT schedule. –Heater bonding fixture trials underway in I&T

7. 7 GLAST LAT ProjectMechanical Systems Open Flight Design Issues Radiator integration sequence –Coupon testing of repeated make & break of joint has been tested. Results were inconclusive due to test facility problems. –Test facility alternatives under investigation. –Disassembly facilitated by use of mold release agent –Baseline process used for LM Radiator thermal vacuum test set up Radiator vibration requirements –Sine vibration testing will not be performed at LM Test options under investigation

8. 8 GLAST LAT ProjectMechanical Systems MECH Qualification Program

9. 9 GLAST LAT ProjectMechanical Systems Cost/Schedule Reports for 4.1.8 Mechanical Systems Presentation Presentation July 2005 Month End Gamma-ray Large Area Space Telescope

10. 10 GLAST LAT ProjectMechanical Systems Level 3 Milestone Count

11. 11 GLAST LAT ProjectMechanical Systems Level 3 Milestone List

12. 12 GLAST LAT ProjectMechanical Systems Milestone Variance Explanation Radiator RFI -36 days Schedule Impact –No impact to LAT schedule Cost Impact –LM requested additional funds to complete Radiator testing –Discussions between GLAST, LM and GSFC were held

13. 13 GLAST LAT ProjectMechanical Systems Cost Report

14. 14 GLAST LAT ProjectMechanical Systems Cost Variance Explanation Why overrun/underrun? –LM has overrun their contract –Proceeding with Radiator testing while cost issue is being worked What will be done to correct? –Additional funding required

15. 15 GLAST LAT ProjectMechanical Systems FTE Report (DOE/NASA-funded only)

16. 16 GLAST LAT ProjectMechanical Systems FTE Variance Explanation Why overrun/underrun? –Delay caused by late start of Grid Box #2 assembly work What is the impact? –Delay in Grid Static Load Test –No LAT impact