1) DOCUMENT CHANGE NOTICE (DCN):
DCN No. E1000689-v1


2) INFORMATION:
DOCUMENT No.	TITLE
D1001600-v2:	aLIGO_TMS_Tele._Sec._Mirror_Mt._Assem.
D1001841-v3:	aLIGO TMS FOCUS SLIDE LOCK
D1001892-v2:	aLIGO TMS Del-Tron-RS1-1 Hort. Slide Assy.
D1001948-v3:	aLIGO TMS DEL-TRON RS1-1 HOR. GUIDE
E1000616-v2:	BOM - TMS Secondary Mirror Mount Assembly

3) CHANGE DESCRIPTION (FROM / TO):
D1001600-v2
On sheet 1 BOM, Item 2 -IS- '4-40 X .13 SKT BUTN HD SCRW, CENTER VENTED' -WAS- '4-40 X .13 SHCS'.
Revision block references revised Engineering BOM E1000616-v2.

D1001841-v3
Zone A8: Dim '2X .18' -WAS- '2X .15'.
Zone B3: Dim '.30' -WAS- '.26'.

D1001892-v2
Revision numbers are added to LIGO P/Ns (as D1001947-v2 & D1001948-v3) listed on the drawing BOM. D1001947-v2
is unchanged, D1001948-v3 is revised per this notice. There is no Engineering BOM since the assembly is
delivered by vendor Del-Tron.

D1001948-v3
Zone B5: Dim '2X .190' -WAS- '2X .220'.
On Top View: Callouts added for existing c'bore holes.

E1000616-v2:
Item 2: -IS- '4-40 X .13, SKT BUTN HD SCRW, CENTER VENTED' -WAS- '4-40 X .13 SHCS'.
Item 10: Revision number -IS- v3, -WAS- v2.
Item 18: Revision number -IS- v2, -WAS- v1.


4) REASON FOR CHANGE:
Heads of screws, item 2 (see E1000616 BOM or D1001600 Drawing) interfering with items 28, 29, & 30.


5) SIGNATURES REQUESTED:
Ken Mailand
Calum Torrie
Dennis Coyne


6) DCN DISTRIBUTION:
Ken Mailand
Calum Torrie
Dennis Coyne


7) NOTES: