| Table
A3 The following RCS jet firings occurred during reentry |
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| Event |
2Time (GMT) |
Duration (Sec.) |
1RCS Thruster |
Remarks |
| 1 | 13:49:07 | - | - | Closed loop guidance initiated Flight Control Program OPS 304. |
| 2 | 13:49:32 | - | - | First roll maneuver initiated, (A roll to the right per STS-107 Accident Investigation Final Report Vol. I). |
| 3 | 13:51:45.38 | 0.24 | L2L | Earliest known off nominal external events detected by remote sensors |
| 4 | 13:51:45.36 | 0.24 | L3L | Earliest known off nominal external events detected by remote sensors |
| 5 | 13:51:46 | - | - | Inertial sideslip angle (beta) goes and stays negative until LOS. |
| 6 | 13:52:08 | - | R2R | Jet firing occurs during data loss, (See Table A1 Event 6). |
| 7 | 13:52:08 | - | R3R | Jet firing occurs during data loss, (See Table A1 Event 6). |
| 8 | 13:52:24 | - | R2R | Jet firing occurs during data loss, (See Table A1 Events 7, 8 and 9). |
| 9 | 13:52:32 | - | R3R | Jet firing occurs during data loss, (See Table A1 Events 7, 8 and 9). |
| 10 | 13:53:01 | - | - | First indication of off-nominal rolling moment, (Start of Neg. growth in roll moment). |
| 11 | 13:53:24 | - | - | Alpha (angle of attack) modulation active. |
| 12 | 13:54:20 | - | - | Start of slow aileron trim change on left wing (Time approx. +/- 10 sec.) |
| 13 | 13:54:20 | - | - | Reversal in growth trend of derived roll moment coefficient, (Moment changed from Neg to Pos). |
| 14 | 13:54:33 | 0.24 | R3R | Orbiter envelope brightens for approximately 0.3 sec. |
| 15 | 13:54:33 | 0.24 | R2R | Orbiter envelope brightens for approximately 0.3 sec. |
| 16 | 13:56:17.28 | 0.24 | R3R | Left main gear brake line temperature rise. |
| 17 | 13:56:17.30 | 0.24 | R2R | Left main gear brake line temperature rise. |
| 18 | 13:56:17.52 | 0.24 | R3R | Left main gear brake line temperature rise. |
| 19 | 13:56:17.54 | 0.24 | R2R | Left main gear brake line temperature rise. |
| 20 | 13:56:30 | - | - | 1st Roll Reversal Initiation, (Mach 21.13). |
| 21 | 13:56:54.71 | - | L2L | Jet firing occurs during data loss, (See Table A1 Events 15). |
| 22 | 13:56:55 | - | - | 1st Roll Reversal Complete, (Mach 20.76). |
| 23 | 13:56:58 | - | - | IMU Velocity Increase, (Reflects accelerations imparted during roll reversal). |
| 24 | 13:57:00 | - | - | Bodyflap deflection up 3°, (Matches nominal aero simulation). |
| 25 | 13:57:01.12 | - | L2L | Jet firing occurs during data loss, (See Table A1 Events 15). |
| 26 | 13:57:46.35 | - | L2L | Jet firing occurs during data loss, (See Table A1 Events 15). |
| 27 | 13:57:53.12 | - | L2L | Jet firing occurs during data loss, (See Table A1 Events 15). |
| 28 | 13:56:54.66 | - | L3L | Jet firing occurs during data loss, (See Table A1 Events 15). |
| 29 | 13:57:01.07 | - | L3L | Jet firing occurs during data loss, (See Table A1 Events 15). |
| 30 | 13:57:46.33 | - | L3L | Jet firing occurs during data loss, (See Table A1 Events 15). |
| 31 | 13:57:53.10 | - | L3L | Jet firing occurs during data loss, (See Table A1 Events 15). |
| 32 | 13:57:43.94 | 0.48 | R2R | Left upper wing skin temperature, OSL (Off Scale Low). |
| 33 | 13:57:44.42 | 0.48 | R2R | Left upper wing skin temperature, OSL (Off Scale Low). |
| 34 | 13:57:43.92 | 0.48 | R2R | Left upper wing skin temperature, OSL (Off Scale Low). |
| 35 | 13:57:44.40 | 0.48 | R2R | Left upper wing skin temperature, OSL (Off Scale Low). |
| 36 | 13:58:03 | - | - | Start of "sharp" aileron trim increase, (Mach 19.79). |
| 37 | 13:58:09 | - | - | Increase in derived rolling and yawing moment increments, (Derived by analysis). |
| 38 | 13:59:30.68 | 7.40 | R2R | Start of R2R yaw firing. |
| 39 | 13:59:30.68 | 7.40 | R3R | Start of R3R yaw firing. |
| 40 | 13:59:31 | - | - | Elevon deflection at LOS - Left: -8.11° (up); Right: -1.15° (up). |
| 41 | 13:59:31.400 | - | - | FCS Channel 4 Aerosurface measurements trending towards their null values. |
| 42 | 13:59:31.478 | - | - | All FCS Channel 4 Bypass valves close, (Indication of ASA failure). |
| 43 | 13:59:31.7 | - | - | Speedbrake channel 4 OI position measurement: 19, 20, 24°, (Should be 0° / closed). |
| 44 | 13:59:32 | - | - | Observed aileron trim at LOS -2.3° (Origin of data after LOS is unknown and therefore questionable). |
| 45 | 13:59:32.130 | - | - | FCS Channel 4 fail flags raised (1Hz) on all aerosurface actuators. |
| 46 | 13:59:32.195 | - | - | ASA 4 RPC A&C Trip Indication. |
| 47 | 13:59:32.598 | - | - | Left Outboard bypass valve reopens, (Voltage drops below threshold of valve, RPC B is current limiting). |
| 48 | 13:59:32.598 | - | - | Force fight between channels 1, 2, 3 & 4 results in 0.5° difference between left and right elevons. |
| 49 | 13:59:34.518 | - | - | Left Outboard force fight ends, (driver currents go to zero). |
| 50 | 13:59:34.561 | - | - | Speedbrake force fight begins, (Continues to end). |
| 51 | 13:59:35/36 | - | - | Sideslip angle on vehicle changes sign; -0.6° to +0.8°, (Reinforces aerodynamic asymmetry). |
| 52 | 13:59:36 | - | - | Growth in bank attitude error, was maintained at 5°, (DAP drops left wing to compensate creates error). |
| 53 | 13:59:36.80 | 0.60 | R4R | Additional jet required to counteract increasing aerodynamic moments. |
| 54 | 13:59:37.30 | 0.10 | R1R | Additional jet required to counteract increasing aerodynamic moments. |
| 55 | 13:59:37.n | - | - | Aileron position is now approx. -5.2° with -2.5° of aileron trim, (Rate of change for trim max'd out). |
| 56 | 13:59:46.347 | - | - | ROLL REF error message, (Suggests rapid change in lift to drag ratio). |
| 57 | 13:59:52.114 | - | - | PASS Fault Message L RCS LEAK. |
| 58 | 14:00:01.540 | - | - | BFS Fault Message L RCS LEAK. |
| 59 | 14:00:01.900 | - | - | BFS Fault Message L RCS LEAK. |
| 60 | 14:00:02.654 | - | - | PASS Fault Message L RCS LEAK. |
| 61 | 14:00:03.637 | - | - | PASS Fault Message L RCS PVT. |
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