Dale wrote:
Why are they looking at RCC panels 19-22 (left wing)? The sensors detected a "1G"
event on ascent, but it was said at a press briefing that it takes 10G to even
leave a "scuff", and 20G to do serious damage.

The accelerometers detected a less than 1G event while the crew were asleep
in shuttle and after the sensor boom sweep. They could not associate this
"bump" with any shuttle activities such as thruster firings. So they took
an opportunity to use the station arm to inspect that area of the wing to
see if there would have been any micro meteorite strike or anything to
explain those sensor readings.

One of the theories is that the vibration was caused by spacehab and its
tunnel expanding/contracting due to big changes in temperatures.

(the above info from the management press conference of monday evening).