Table A2
The following anomalous sensor readings and failures occurred during reentry
Event Time
(GMT)		 MSID 1Sensor
Ref. No.		 Sensor affected by event Remarks

1

 13:52:17 V58T1703A 1 Left Main Gear Brake Line Temp D Off nominal temp rise.
2 13:52:32

V62T0439A
V62T0440A

 33 & 34 Supply Water Dump Nozzle A/B Off nominal temp rise.
3 13:52:32 V62T0519A
V62T0520A		 35 & 36 Waste Water Dump Nozzle A/B Off nominal temp rise
4 13:52:32 V62T0551A 37 Vacuum Vent Off nominal temp rise.
5 13:52:41 V58T1700A 2 Left Main Gear Brake Line Temp A Off nominal temp rise.
6 13:52:41 V58T1702A 3 Left Main Gear Brake Line Temp C Off nominal temp rise.
7 13:52:56 V09T1006A 4 Left Inboard Elevon Lower Skin Temp Off nominal temp downward trend.
8 13:52:59 V09T1006A 4 Left Inboard Elevon Lower Skin Temp Sensor goes offline.
9 13:53:03 - - Left outboard Elevon wide-band accelerometer (10 Gs peak to peak) signal saturation indicative of failure
10 13:53:10 V58T0394A 5 Hyd. Sys. 3 Left Outboard Elevon Actuator Return Line Temp 2Sensor goes offline.
11 13:53:11 V58T0157A 6 Hyd. Sys. 1 Left Inboard Elevon Actuator Return Line Temp 2Sensor goes offline.
12 13:53:34 V58T0193A 7 Hyd. Sys. 1 Left Outboard Elevon Actuator Return Line Temp 2Sensor goes offline.
13 13:53:35 V62T0439A
V62T0440A		 33 & 34 Supply Water Dump Nozzle A/B Return to normal temp rise rate.
14 13:53:35 V62T0519A
V62T0520A		 35 & 36 Waste Water Dump Nozzle A/B Return to normal temp rise rate.
15 13:53:35 V62T0551A 37 Vacuum Vent Return to normal temp rise rate.
16 13:53:36 V58T0257A 8 Hyd. Sys. 2 Left Inboard Elevon Actuator Return Line Temp 2Sensor goes offline.
17 13:54:10 V58T1701A 9 Left Main Gear Brake Line Temp B Off nominal temp rise.
18 13:54:20 - - Start of slow Elevon trim change on left wing (Time approx. +/- 10 sec.) counteracts buildup of aero drag.
19 13:54:22 V34T1106A 10 Mid. Fuselage Left Body Line Temp Off nominal temp rise.
20 13:54:22 V09T1724A 28 Left Aft Fuselage Sidewall Off nominal temp rise.
21 13:54:24 V58T0405A 11 Left Main Gear Strut Actuator Temp Off nominal temp rise.
22 13:54:53 V51T0574A 18 Main Landing Gear Left Hand Outboard Wheel Temp Off nominal temp rise.
23 13:55:12 V58T0842A 13 Hyd. Sys. 3 Left Hand Forward Brake Switch Valve Rtn. Line Temp Off nominal temp rise.
24 13:55:41 V34T1118A 27 Mid. Fuselage Port (Left) Sill Longeron Temp Off nominal temp rise.
25 13:56:16 V58T0125A 12 Left Main Gear Uplock Actuator Unlock Line Temp Off nominal temp rise.
26 13:57:19 V51P0570A 17 Main Landing Gear Left Hand Outboard Tire Pressure 1 Off nominal temp rise.
27 13:57:24 V51P0572A 22 Main Landing Gear Left Hand Outboard Tire Pressure 2 Off nominal temp rise.
28 13:57:28 V09T1002A 15 Left Lower Wing Skin Temp Sensor goes offline.
29 13:57:43 V09T1024A 14 Left Upper Wing Skin Temp Sensor goes offline.
30 13:57:54 V58T0841A 16 Hyd. Sys. 2 Left Hand Forward Brake Switch Valve Rtn. Line Temp Off nominal temp rise.
31 13:58:38 V51P0570A 17 Main Landing Gear Left Hand Outboard Tire Pressure 1 Sensor goes offline.
32 13:58:39 V51T0574A 18 Main Landing Gear Left Hand Outboard Wheel Temp Sensor goes offline.
33 13:58:40 V51P0571A 19 Main Landing Gear Left Hand Inboard Tire Pressure 1 Sensor goes offline.
34 13:58:43 V51P0573A 22 Main Landing Gear Left Hand Inboard Tire Pressure 2 Shows pressure rise.
35 13:58:48 V51T0575A 20 Main Landing Gear Left Hand Inboard Wheel Temp Sensor goes offline.
36 13:58:48 V51P0573A 21 Main Landing Gear Left Hand Inboard Tire Pressure 2 Sensor goes offline.
37 13:58:54 V51P0572A 22 Main Landing Gear Left Hand Outboard Tire Pressure 2 Sensor goes offline.
38 13:59:06 V51X0125E 31 Left Main Gear Downlocked Indicates gear is downlocked.
39 13:59:32 - - -

LOS

Data taken from STS-107-Timeline-Rev15.xls and STS-107 GTrack Rev 15.pdf

  1. Corresponds to circle numbers in Fig. A6 and the STS-107_Event_Sequence.pdf  document.

  2. Prior to going off line the official report states that the sensor "Shows wire damage trend" with no other description.

The only sensors listed in the Event Sequence document that remained nominal while data was still being transmitted had the reference numbers 23, 24, 25 and 26 and were attached to the following devices,

  1. Hyd. Sys. 3 Left Inboard Elevon Actuator Return Line Temp

  2. Hyd. Sys. 2 Left Outboard Elevon Actuator Return Line Temp

  3. Hyd. Sys.  Left Inboard Elevon Actuator Temp

  4. Hyd. Sys.  Left Outboard Elevon Actuator Temp

Per STS-107_Sensor_Failure.pdf  the 2 sensors which showed the greatest temperature increases were number 11 at 6°/min. for a total of 5 minutes, (+30°F), and number 17 at 14°/min for 1 minute and 38 seconds, (+22.87°F).  This was not anywhere near enough heat to cause damage to Columbia's left wing.  In addition to this some of the sensors showed temperature decreases before they went off line.