Report of the PRESIDENTIAL COMMISSION
on the Space Shuttle Challenger Accident
Volume 5 Index
Hearings of the Presidential
Commission on the Space Shuttle Challenger Accident: February 26,
1986 to May 2, 1986.
MAY 2, 1986 SESSION. (part 1 of
2)
[1559] [Ref. 5/2-11 3 of
18] STS-51C (SRM-15) Postflight Hardware Damage Assessment.
STS-51C (SRM-15) Postflight Hardware
Damage Assessment.
- A67 (LEFT FORWARD FIELD JOINT)
- GAS PATH THRU PUTTY AND PAST PRIMARY
O-RING AT 163°
- HARD THIN CHAR ON TANG INSULATION AT
163°
- CHAR ON CLEVIS PUTTY STILL SOFT (T= 1/8
- 3/6 INCH) AT 163°
- SOOTED ARC ON TANG SEAL SURFACE AND
INSUL. FACE 124° TO 188°
- BLACK GREASE (SOOTED) BETWEEN O-RINGS
150° TO 230°
- PRIMARY O-RING SOOTED AT INTERFACE WITH
GROOVE ON UPSTREAM SIDE
- SOOT IN THE PRIMARY GROOVE ON THE
DOWNSTREAM SIDE
- SOOT TOTALLY COVERED THE GREASE ON THE
LAND BETWEEN THE O-RINGS
- GREASE WAS SOOTED (BLACKENED) BUT STILL
WAS GREASY - NOT HARD
- BOTTOM AND AFT FACE OF SECONDARY GROOVE
HAD CLEAN GREASE
- CLEVIS SURFACE AFT OF SECONDARY O-RING
HAD CLEAN GREASE
- NO SECONDARY O-RING BLOW-BY WAS
OBSERVED
[1560] [Ref. 5/2-11 5 of
18] STS-51C (SRM-15) Postflight Hardware Damage Assessment.
Back