As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: PILOT REPORTS EMERGENCY LANDING ON ACCOUNT OF DOOR WARNINGS AT BOTH FRONT ENTRY DOORS AND NOISES REPORTED BY CREW IN FLIGHT. DIVERTED. MAINTENANCE PRESSURIZED AIRCRAFT TO 7.6 PSID IAW AMM 05-53-00-780-002-A01. NO PRESSURE LEAK AT 1R DOOR OR ANY OTHER ENTRY DOOR. MAINTENANCE REPLACED THE CABIN PRESSURE DIFFERENTIAL PRESSURE SWITCH 14WN IAW AMM 52-73-12-400-001-A4.A.(12).