SDR SCNA99095

Service difficulty report · Controller · Boeing 727225

Difficulty date: July 23, 1999
Submitted: March 26, 2000
Operation: Air carrier
Aircraft: N283SC
Make and model: Boeing 727225
Aircraft serial: 22559
System (JASC): 2131 · Cabin Pressure Controller
Part: Controller
Condition: Failed
Location: Cabin
Stage of operation: DE
Nature of condition: J
Precautionary procedure: O

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

What was found

UPON DESCENT CABIN BEGAN TO CLIMB AT 1200 FEET PER MINUTE, CLOSED CABIN OUTFLOW VALVE AND CLIMB DIDN'T CHANGE. WENT TO STANDBY MODE AND THEN MANUAL BUT COULD NOT CONTROL PRESSURIZATION. ALL PASSENGER SERVICE UNIT OXYGEN MASKS DROPPED. PRESSURIZED AIRCRAFT AND FOUND FLOW AND RATE OF CLIMB TO CHECK NORMAL. NO LEAKS WERE NOTED. PERFORMED OPERATIONAL CHECK OF PRESSURIZATION CONTROLLER. SYSTEM CHECKS GOOD IAW MM 21310.