As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CABIN WOULD NOT PRESSURIZE AFTER TAKEOFF. 10-29-07 TROUBLESHOT TO INTERMITTENTLY FAILED LEFT SQUAT SWITCH. REMOVED AND REPLACED LT SQUAT SWITCH. OPERATIONAL CHECKS GOOD AT THIS TIME. WORK DONE IAW. CESSNA MODEL 560 M.M. CHAPTER 21-31-04.