SDR AALA20180625008

Service difficulty report · Controller · Boeing 737823

Difficulty date: June 25, 2018
Submitted: June 27, 2018
Operation: Air carrier
Aircraft: N906AN
Make and model: Boeing 737823
Aircraft serial: 29508
Aircraft time: 56,951 hours, 23,012 cycles
System (JASC): 2131 · Cabin Pressure Controller
Part: Controller
Condition: Malfunctioned
Location: Cabin Pressure
Stage of operation: CR
How discovered: O
Nature of condition: J
Precautionary procedure: A

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

LOST CABIN PRESSURE AT FL370, IN AUTO MODE, PERFORMED QRH AND SWITCHED TO ALT. STILL NO CONTROL OF CABIN ALTITUDE. SWITCHED TO MANUAL AND FINALLY GOT CONTROL OF CABIN PRESSURE AT 15,000 FT. DIVERTED EMERGENCY DECLARED AND LANDED WITHOUT FURTHER INCIDENT. AIRCRAFT WAS GROUNDED. ACCOMPLISHED AMM TASK 21-31-00-700-802 PRESSURIZATION SYSTEM GROUND TEST ON BOTH NR 1 AND NR 2 CABIN PRESSURE CONTROLLERS. BOTH CHECKED GOOD.