re: I rather doubt that the TEGA doors are made of cheap iron
The latest is that it's a mechanical problem:
Jun. 24, 2008 | 10:59 PDT | 17:59 UTC
Phoenix sol 29 update: Anomalies here and there, but minimum mission success is on the horizon.
"They now think they understand the problem with the TEGA doors, that it is a mechanical problem, that an assembly "was not fabricated to flight specifications." However they still think they can get samples in, and plan to try it on sol 30 or 31."
http://www.planetary.org/blog/article/00001521/