1) DOCUMENT CHANGE NOTICE (DCN):
DCN No. E1000688-v1


2) INFORMATION:
DOCUMENT No.	TITLE
D1000072-v2:	aLIGO_ETM_TELE_TUBE
D1000242-v2:	aLIGO_ETM_TELE_TUBE_THD_INSERT
D1000243-v1:	aLIGO_ETM_TELE_TUBE_AND_INSERTS_ASSEMBLY
E1000687-v1:	BOM - ETM Telescope Tube and Inserts Assembly


3) CHANGE DESCRIPTION (FROM / TO):
D1000072
Two radial patterns of three .281 dia. holes thru wall -WERE- radial patterns of three .221 dia. holes thru all.
Positional tolerance on radially patterened holes -IS- 'regardless of feature size' -WAS- 'at MMC'.
Added straightness .06 T.I.R..
Material -IS- Invar 36, -WAS- 1023 Steel.
Added 63 microinch Ra finish.
Added flag note 12 for part matching. Used on next assembly D1000243.
Added flag note 13 for part grouping. Used to group next assembly D1000243 as sets for top telescope assemblies D1002296.
Added flag note 14 for electropolishing.

D1000242
Radial pattern of three 1/4-20 oversize tapped holes thru wall -WAS- radial pattern of three #10-24 tapped holes thru all.
Added flag note 11 for oversize drilling & tapping applied to all tapped holes.

D1000243 & E1000687
Initial releases.


4) REASON FOR CHANGE:
Designs updated for D1000243 first article build (set of three).


5) SIGNATURES REQUESTED:
Ken Mailand
Calum Torrie
Dennis Coyne


6) DCN DISTRIBUTION:
Ken Mailand
Calum Torrie
Dennis Coyne


7) NOTES: