As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LGA - FLT 1156 - DURING FLIGHT THERE WAS DEPRESSURIZATION. THE NR 1 PACK FAULTED. CAPTAIN GOT THE CABIN PRESSURE UNDER CONTROL. ACFT DIVERTED AND LANDED WITHOUT INCIDENT. MAINTENANCE OPERATED NR 1 PACK WITH ENGINE BLEED AND APU AIR. CHECKS SATISFACTORY. NO FAULT PRESENT. (W)