NAFTA
N A T I O N A L    A E R O N A U T I C S    A N D    F L I G H T    T R A I N I N G    A D M I N I S T R A T I O N
you are trainee #since April 29, 1999

TERMINAL COUNTDOWN CHECKLIST AND PROCEDURES
 
 

  • NOTE: THE PILOT AT THIS TIME WILL TURN ON THE "NO SMOKING" SIGNS. CHAIRS MUST BE PLACED IN A FULL UPRIGHT POSITION FOR LAUNCH. CHILDREN SHOULD BE PROPERLY STRAPPED IN APPROVED CHILD SAFETY SEATS, REAR-FACING, AND UNDER NO CIRCUMSTANCES SHOULD THEY BE IN A FRONT SEAT. VERIFY CREW IS CARRYING PROPER AND CURRENT INSURANCE INFORMATION.

T-09M00S THE COUNT HAS RESUMED NTD ALL
         GLS AUTO SEQUENCE HAS BEEN INITIATED GLS CGLS,ALL
         SELECT PAYLOAD BAY SAMPLE LINE OTC,CHGD
T-07M30S RETRACT ORBITER ACCESS ARM AND LEG GLS GLS(Auto)
T-07M15S REMOVE & STOW FUZZY DICE
                  ADJUST REAR AND SIDE VIEW MIRRORS
T-07M00S SELECT MIDBODY SAMPLE LINE OTC,CHGD
T-06M15S PERFORM APU PRE-START 212 OTC,PLT
         SELECT ET INTERTANK SAMPLE LINE OTC,CHGD
T-06M10S (CDR) INSERT VEHICLE KEY INTO IGNITION SWITCH
T-05M00S GO FOR APU START GLS CGLS,OTC,PLT 212
T-04M55S ROTATE IGNITION KEY TO "ACCESSORY" POSITION
 

  • NOTE: IN THE CASE OF A LAUNCH SCRUB AT NIGHT, MAKE SURE THE HEADLIGHTS ARE TURNED OFF WHEN EXITING OR A TOTAL DISCHARGE OF THE BATTERY MAY RESULT, REQUIRING A ROLLBACK AND REPLACEMENT OF THE BATTERY. IF THE BATTERY IS DRAINED AND ANOTHER SHUTTLE IS ON THE ADJACENT PAD, SEE THE CHECKLIST ENTITLED: "JUMPSTARTING THE SHUTTLE".

T-04M55S VERIFY ET/SRB RANGE SAFETY SYSTEM SAFING & ARM
         DEVICE ARMED    GLS CGLS (Auto)
         VERIFY SRM IGNITION SAFING & ARM DEVICE ARMED   GLS CGLS (Auto)
         TERMINATE LOX REPLENISH   GLS CGLS (Auto)
T-04M48S CLOSE LOX INBOARD F&D VALVE GLS CGLS (Auto)
T-04M35S OPEN LOX DRAIN VALVE GLS CGLS (Auto)
T-04M30S MAIN FUEL VALVE HEATERS OFF GLS CMPS
T-04M00S INITIATE SSME PURGE SEQUENCE 4 GLS CGLS (Auto)
T-04M00S PUMP GAS PEDAL TWICE TO PRIME

T-04M00S VERIFY SSME VALVE MOVEMENT IN THE CGLS (Auto) CLOSE DIRECTION
T-03M55S INITIATE ORBITER AERO SURFACES PROFILE CHECK GLS CGLS (Auto)
T-03M30S INITIATE MPS GIMBAL PROFILE CHECKS GLS CGLS (Auto)
         TURN STEERING WHEEL RIGHT ONE FULL TURN AND THEN LEFT TWO
         FULL TURNS.
         PILOT WATCHES IN SIDE VIEW MIRROR FOR PROPER AEROSURFACE AND MPS
         MOVEMENT [MPS MOVEMENT VERIFIED BY GROUND USING CCTV]
T-03M03S MPS ENGINES TO START POSITION GLS CGLS (Auto)
         VERIFY BODY FLAP TO LAUNCH POSITION GLS CGLS (Auto)
         VERIFY "DOOR AJAR" AND "CHECK ENGINE" LAMPS BOTH OFF
T-03M00S SELECT AFT FUSELAGE SAMPLE LINE OTC,CHGD
T-02M55S INITIATE ET LOX PRESSURIZATION GLS CGLS (Auto)
         TERMINATE SSME GN2 PURGE GLS CGLS (Auto)
T-02M50S TERMINATE GOX VENT HOOD PURGE GLS CGLS (Auto)
         RETRACT GOX VENT HOOD GLS CGLS (Auto)
T-02M35S PRSD TRANSFER TO INTERNAL REACTANTS GLS CGLS (Auto)
T-02M25S DISTRIBUTE 1 STICK BEEMAN'S CHEWING GUM TO EACH CREW MEMBER FOR
         ASCENT EAR CANAL PRESSURE EQ.
T-02M00S CLOSE VISORS 212 OTC,CDR CHECK ZIPPER
T-01M57S TERMINATE LH2 REPLENISH GLS CGLS (Auto)
         CLOSE LH2 TOPPING VALVE GLS CGLS (Auto)
         CLOSE LH2 VENT VALVE GLS CGLS (Auto)

T-01M46S INITIATE LH2 PREPRESS GLS CGLS (Auto)
T-01M40S INITIATE LH2 PRESS GLS CGLS (Rudy)
T-01M30S T-1 MINUTE 30 SECONDS 212 NTD,ALL
         ET BIPOD HEATERS OFF GLS CGLS (Auto)
T-01M00S T-1 MINUTE 212 NTD,ALL
T-00M55S PERFORM SRB FWD MDM LOCKOUT GLS CGLS (Auto)
         VERIFY SRB MDM CRITICAL COMMANDS GLS CGLS (Auto)
         VERIFY SRB MDM UNNECESSARY COMMANDS
T-00M50S GROUND POWER REMOVAL (DO NOT YANK CORD - PULL FROM PLUG)
         GLS CGLS (Auto)
T-00M48S CLOSE LOX & LH2 OUTBOARD FILL & DRAIN VALVES GLS CGLS (Auto)
         DEACTIVATE SRB JOINT HEATERS
         GLS CGLS (Auto)
T-00M31S GLS GO FOR AUTO SEQUENCE GLS CGLS (Auto)
         ARM CUT OFF GLS CGLS (Manual)
         INITIATE RSL5 GLS CGLS (Auto)
         MAKE THE CALCULATIONS FOR THE JUMP TO LIGHTSPEED (R2 UNIT)
         ORB VENT DOOR SE9 START GPC CGLS (Auto)

  • NOTE: AFTER THIS TIME, ONLY CUT OFF IS AVAILABLE & WILL RESULT IN GLS RECYCLING TO T-20 MINUTES & HOLDING. ADDITIONALLY, THE PLASMA FIELD GENERATORS MAY OVERLOAD FROM THE LAUNCH-PRIMED DILITHIUM CRYSTAL STARTUP SEQUENCE. IF THIS SHOULD OCCUR, EJECT THE WARP CORE AND CLIMB UNDER A CHAIR OR OTHER SOLID OBJECT.

T-00M28S START SRB APU'S (L)
T-00M26S START SRB APU'S (R)
T-00M25S 25 SECONDS 212 NTD,ALL
T-00M23S ARM PILOT AND COMMANDER AIR BAGS
T-00M21S START SRB GIMBAL TEST GLS CGLS (Auto)
T-00M20S 20 SECONDS 212 NTD,ALL
T-00M19S PLT ROLLS DOWN SIDE WINDOW, CALLS "CLEAR", CLOSES WINDOW
T-00M16S ACTIVATE SOUND SUPPRESSION WATER GLS CGLS (Auto)*(see below)
T-00M15S 15 SECONDS 212 NTD,ALL
T-00M14S SET TRIP ODOMETER TO ZERO
T-00M13S PERFORM SRB AFT MDMS LOCKOUT GLS CGLS (Auto)
         VERIFY LH2 HIGH POINT BLEED VALVE CLOSED GLS
         TERMINATE MPS HELIUM FILL GLS
         PS1 VERIFY HELIUM QUALITY; INHALE APPX 1 LITER FOLLOWED BY
         TX: "HOUSTON, DISCOVERY. COM CHECK. HOW DO YOU READ?"
T-00M10S 10 SECONDS 212 NTD,ALL
         FREE HYDROGEN BURN OFF SYSTEM IGNITION GLS CGLS (Auto)
         INJECT EXCESS HYDROGEN INTO ENGINE BELL FOR REALLY COOL PYRO EFFECT
         GLS GO FOR MAIN ENGINE START GLS
         REMOVE ET/SRB RANGE SAFETY INHIBITS, C A R E F U L L Y
         ... GLS CGLS (Auto)
T-00M7.0S  ROTATE IGNITION KEY TO "START"
           SHIFT INTO FIRST GEAR WHILE HOLDING CLUTCH DOWN
         GROUND CREW REMOVE CHOCKS
T-00M6.6S  MAIN ENGINE 3 START COMMAND GPC RSLS (Auto)
T-00M6.48S MAIN ENGINE 2 START COMMAND GPC RSLS (Auto)
T-00M6.36S MAIN ENGINE 1 START COMMAND GPC RSLS (Auto)
T-00M00S   T-ZERO SRB IGNITION 212 RSLS (Auto)
           SRB HOLDDOWN RELEASE COMMAND
           GRADUALLY LET OFF CLUTCH AND INCREASE PRESSURE ON PEDAL
           LIFTOFF [OBEY ALL TRAFFIC SIGNS AND POSTED SPEEDS]
 
 

  • AFTER SECOND STAGE FLIGHT HAS BEGUN THE PAYLOAD SPECIALIST MAY BEGIN SERVING A SMALL SNACK. 

 
 
Glossary

"Sound Suppression Water" - Specially developed by NASA, SSW is simply water that has had all its noise removed, thus rendering it able to absorb great amounts of sound at liftoff. 
 
 
 
 
 
 
 

NOTE: This procedure bears little resemblance to reality, and is in no way associated with NASA.