Interesting article in the Wiki:
http://en.wikipedia.org/wiki/Adam_Air
Also,
Reuters reports the Indonesian government called for immediate safety checks on Adam Air's six 737-300s after the incident at Juanda Airport in Surabaya. The aircraft's center fuselage section reportedly cracked from the top, leaving the plane's tail drooping towards the runway.
Until those checks are performed, Adam Air cannot fly the aircraft... a ruling the airline called unnecessarily harsh.
"The Adam Air management is surprised by the decision and views it as harsh punishment given to a national airline," the company said in a statement directed at the Transport Ministry. The airline added strong winds and heavy rain contributed to Wednesday's incident, and that the 13-year-old aircraft had undergone thorough checks prior to the accident flight.
What appears to be structural failure from an unusually hard landing could be due to some other factor(s).