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84 
Project No.______
Book No._____
TITLE ___TCDT STS-4____

From Page No.____
 
L-1 activities - pretty nominal. Flew STA suited 
Hank will activate debris camera; FDF Markups (no hyd's - DEV OMI) 
(ACTION) TK requests an additional no comm hand signal for PWR DN w/o Egress 

CFCS running real late (air in lines; GSE/front pnl interference) Will hit CTS. 
1800 cue card fit check cplt 
CTS on time. Comm act. late & running slow: CFES in way; too many other parallel activities. (Williams working many items, but not comm!) 
Steve deleted seat back pressuring because GSE/CFES conflict & to fix time. 
On-shed @ end OSSV 1. 
*Switch list in parallel. 82-1 fan level was low (Su); Std Sw Panel not right (lower L & R quad overlays are identical - shouldnt be so). SPERN PR 
*Crew preference cockpit config items: PLT's LVLH vice REF on ADI 2 BFS displays. 
Work 482/Dev vice Do it routes (Griffith, Hawley) 
*Do not pull OIS prior to switch list in future 
Question of guards for PL Bay Floods still open 
TERMINAL COUNT: 
OMS gimbal profile IPR - believed due GOAL calc. of drive rates. 
IMU ALIEN COMPLETE discrete not set. Also believed due gnd S/W. 
(6 mm) T-4m Unplanned hold. Error in masking HYD SPLY P's for TCDT 
(6 mm) T-2 55 Unplanned hold. Actr /_\ [[Greek Delta Symbol]] P' limits should have been mashed (Flaky without hyds due to friction effects) 
(16 mm) T-1 57 Unplanned hold. LCC lost NSP frame sync but when MILA U/L carrier executer failed, 16 min 
T-031 Unplanned hold. AC voltage glitches on all buses; MCA ob's popped; vent doors @ rud-travel. Conflicting ends on vent door MCA's (S0017 procedural oversight) 
Egressed crew, set new T-0 (1520 EDT) & commenced recycle activities 
Pick up T-20M @ 1450 w/o RSS holds, suits, abort advisory checks SSME ETU #1 still down; believe procedural prob. Mask RSLS. 

Cabin for B = source of 200hz noise (acoustic surrey run during hold) 
*UNLOAD THE EARLY TIMELINE 

To Page No.___
Witnessed & Understood by me,_____
Date____
Invented by_____
Recorded by_____
Date____