1. LBT Q1 2008 Engineering Review Swing Arms (SWA)

2. 2008-Apr-04LBT Q1 2008 Engineering Review Highlights (Q4/2007) The PF SAs lost their cable trays The PF SAs lost their cable trays Interference with AS Interference with AS Cable trays removed Cable trays removed New ones to be put on bottom of swing arm New ones to be put on bottom of swing arm Installed, ready to wire Ready to commission M3 Commissioned with action items PF Ready to commission AS DXSX

3. 2008-Apr-04LBT Q1 2008 Engineering Review Progress (Q4/2007) From Planning at last review: From Planning at last review: DX M3 Swing Arm Wiring 3/3-3/12 DX M3 Swing Arm Wiring 3/3-3/12 Kicked around the schedule a few times, finally landing 3/31- 4/10 Kicked around the schedule a few times, finally landing 3/31- 4/10 Work on PF action items Work on PF action items Preloading & shock absorber testing of DX M3 3/31- 4/1 Preloading & shock absorber testing of DX M3 3/31- 4/1 4/11 4/11 Commissioning of last 4 swing arms 4/14 – 4/25 Commissioning of last 4 swing arms 4/14 – 4/25 Still on the schedule Still on the schedule Software punch list has been completed with the exception of swing arm queuing. GUI has been re- worked to facilitate the new commands. Software punch list has been completed with the exception of swing arm queuing. GUI has been re- worked to facilitate the new commands.

4. 2008-Apr-04LBT Q1 2008 Engineering Review Open Issues Technical Technical Shock absorber testing Shock absorber testing Action items on PF SA to complete commissioning Action items on PF SA to complete commissioning Software must be re-tested to wring out new features changed/added since last testing round. Software must be re-tested to wring out new features changed/added since last testing round. Queuing must be added and tested. Queuing must be added and tested. Schedule Schedule Tight schedule with 4 weeks of constant work on the SAs Tight schedule with 4 weeks of constant work on the SAs Financial Financial None None Resource Resource Mountain manpower availability Mountain manpower availability Telescope time, other projects, night observing Telescope time, other projects, night observing Need 1 more scissors lift Need 1 more scissors lift

5. 2008-Apr-04LBT Q1 2008 Engineering Review Planning (Q2/2008) DX M3 Swing Arm Wiring/Testing 3/31-4/10 DX M3 Swing Arm Wiring/Testing 3/31-4/10 Complete PF action items Complete PF action items Preloading & shock absorber testing of DX M3 4/11 Preloading & shock absorber testing of DX M3 4/11 Commissioning of last 4 swing arms 4/14 – 4/25 Commissioning of last 4 swing arms 4/14 – 4/25 Testing of new/changed software features. Testing of new/changed software features. Replace PF cable trays Replace PF cable trays Thomas Hair Coordinating Thomas Hair Coordinating Currently being manufactured – delivery 6 May Currently being manufactured – delivery 6 May