As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: DURING CLIMB THROUGH 15000 FEET ALARM FOR CABIN PRESSURE WENT OFF CONTINUOUSLY; AIRCRAFT AIR INTERRUPTED BACK TO AND LANDED SAFELY AT LAS. ACCOMPLISHED CABIN ALTITUDE WARNING SWITCHES TEST FOR S128 AND S1153 AND FOUND S1153 OUT OF LIMITS, PER AMM 21-33-04. REPLACED S1153 SWITCH AFT NUMBER 2, PER AMM 21-33-04.