What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
San Jose, CA (sjc): privacy data omitted, BE40, sjc-jac, declared an emergency due to pressurization issue. Pilot requested to return to sjc. Aircraft landed without further incident at 2157Z.
Pilot discrepancy noted in aircraft maintenance logbook indicated the following:
?Cabin altitude was higher than normal, noticed the cabin rate climbing @ 1000 per min. Then heard a whistling noise close to the cabin door. ?cabin pressure low? Light came on. Once we reached below 20,000 then the noise got quieter after we selected ?both high? On the cabin pressure control. Cabin would not maintain pressure until we were lower and in ?both high??.
As the FAA filed it
SAN JOSE, CA (SJC): ^PRIVACY DATA OMITTED^, BE40, SJC-JAC, DECLARED AN EMERGENCY DUE TO PRESSURIZATION ISSUE. PILOT REQUESTED TO RETURN TO SJC. AIRCRAFT LANDED WITHOUT FURTHER INCIDENT AT 2157Z.
PILOT DISCREPANCY NOTED IN AIRCRAFT MAINTENANCE LOGBOOK INDICATED THE FOLLOWING:
?CABIN ALTITUDE WAS HIGHER THAN NORMAL, NOTICED THE CABIN RATE CLIMBING @ 1000 PER MIN. THEN HEARD A WHISTLING NOISE CLOSE TO THE CABIN DOOR. ?CABIN PRESSURE LOW? LIGHT CAME ON. ONCE WE REACHED BELOW 20,000 THEN THE NOISE GOT QUIETER AFTER WE SELECTED ?BOTH HIGH? ON THE CABIN PRESSURE CONTROL. CABIN WOULD NOT MAINTAIN PRESSURE UNTIL WE WERE LOWER AND IN ?BOTH HIGH??.