STS-80
Report # 22 
Friday, November 29, 1996  6 a.m. CST 
 
 The planned spacewalk by astronauts Tammy Jernigan and Tom Jones was
canceled late Thursday after the airlock outer hatch failed to open.
An engineering team spent all night and into this morning gathering
data to assist in determining a cause for the problem and what action
to take.

  The crew's schedule has been adjusted by one hour to preserve the
option for another spacewalk attempt tonight.  The shuttle mission
management team will meet late this morning to review the data
collected thus far and will determine what troubleshooting measures
are available and whether another spacewalk will be attempted tonight.

  Because the meeting occurs while the crew sleeps, Commander Ken
Cockrell, Pilot Kent Rominger and Mission Specialists Story Musgrave,
Jernigan and Jones will likely not find out what has been decided
until they wake up shortly before 3 p.m. central time.

  If the decision is made to attempt the spacewalk tonight, it would
begin about 8:15 p.m.

  A minor problem reading electrocardiogram data on Jones space suit
was determined to be a signal conditioner which would be replaced with
a spare should the spacewalk be rescheduled.  The problem in itself
would not have precluded the spacewalk from occurring last night.

  The ORFEUS-SPAS astronomy satellite continues to operate as planned
some 20 nautical miles behind the orbiter.  A station-keeping engine
firing was not required this morning since the two spacecraft are
maintaining a stable operating distance from one another.  The next
planned rendezvous burn is set for about six o'clock this evening.

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