1) DOCUMENT CHANGE NOTICE (DCN): DCN No. E1000839-v1 2) INFORMATION: DOCUMENT No. TITLE D1002211-v3: aLIGO TMS FLEXIBLE SEC MIRROR MT. D1000071-v2: TRANSMON_TELE_END_PLATE_ENTRY_3_TUBE C1002521-v1: TDM - Delta High-Tech, Drawing D1000071-v2 C1002522-v1: TDM - Delta High-Tech, Drawing D1002211-v3 3) CHANGE DESCRIPTION (FROM / TO): D1002211-v3: SHEET 2, ZONE B-8: One 10-32 tapped hole in the view was showing dashed lines representing threads, while an adjacent 10-32 tapped hole was without dashed lines. Both holes show dashed lines representing threads this revision. SHEET 3, ZONE C-5: One 10-32 tapped hole in the part (right-center in view) was showing a dashed circle representing threads, while another 10-32 tapped hole (near top in view) was without a dashed circle. Both holes show dashed circles representing threads this revision. Also, a dashed circle representing the coaxial .234 diameter hole to the far side of the upper 10-32 tapped hole is added this revision. D1000071-v2: SHEET 1: ZONE B-6: SECTION A-A view moved from SHEET 1 to SHEET 3. ZONE A-5: DIAMETER Dim 8.50 THRU -WAS- 7.50 THRU. SHEET 2: ZONE A-3: Bolt circle diameter -FROM- 8.250 -TO- 9.250. Bolt circle diameter -FROM- 9.375 -TO- 10.375. SHEET 3: SECTION A-A: Dim .122-.142 -WAS- .08-.10. Added .012-.020 material reduction from left end of part in view to .12 right of flexure feature. 4) REASON FOR CHANGE: D1002211-v3: The above stated non-consistencies of the previous revision caused confusion to the first article part vendor. D1000071-v2: Necessary corrections & improvements to form fit & function of the part. 5) SIGNATURES REQUESTED: Ken Mailand Calum Torrie Dennis Coyne 6) DCN DISTRIBUTION: Ken Mailand Calum Torrie Dennis Coyne 7) NOTES: