I have not found any information about contingencies for failed wing mirror deployment. Could JWST operate, and at least partially fulfill its scientific mission, with only the center core mirror, containing 12 of the 18 total sections, in case either of the two wings fails to deploy?
Q: Could JWST operate with failed or partial wing mirror deployment?
(but in a limited capacity)
According to this, 15:10:
It can still operate using the light reflecting off of the 12 fixed mirrors.
If worse comes to worst, however, would James Webb still be able to operate if a major mirror system, such as the two foldable wings of the primary mirror, didn’t deploy?
“The only thing I can tell you is that we certainly cannot meet our baseline requirements. Without the wings, we would not meet the requirement for [mirror] area. Where we still could meet a minimal set of requirements is if one mirror does not fully deploy. And we do have contingency plans for what to do if we had an issue, for example, with one of the mirrors.”
“For example, we could point the mirror out of the way if we have some actuators working, or we could defocus it. So we could potentially get by without one of the mirrors. I think it’s extremely unlikely that that would happen, though, to be very honest with you. The mirrors have been really well tested, and there’s all the redundancy you would want.”
“The big deployments are different because they are more difficult to test in a 1-g environment. For example, we deployed mirrors during a test at temperature and we deployed them at different gravity orientations. So we’ve really covered all the potential environments. So even though we could live without a mirror, it’s just incredibly unlikely.”
"We can meet all our most fundamental requirements with 17 segments," he said. "We can try to compensate with the other segments and the secondary, it depends on if it's within a certain range. But if it's a bad segment, we can just tilt it completely out of the way with the remaining actuators. That's not great ... but we could still meet our level-one requirements."
- still looking for more NASA docs though.