SDR ASAA1159669

Service difficulty report · Unknown · Boeing 737890

Difficulty date: May 18, 2011
Submitted: May 24, 2011
Operation: Air carrier
Aircraft: N596AS
Make and model: Boeing 737890
Aircraft serial: 35688
System (JASC): 2130 · Cabin Pressure Control System
Part: Unknown
Condition: Malfunctioned
Location: Cabin Pressure
Stage of operation: CL
How discovered: O
Nature of condition: O
Precautionary procedure: K

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

What was found

CLIMBOUT SEA TO FL380 FR FL230 TO FL 380 CABIN IVSI WAS CYCLING +500 TO+1000 OUT OF FL 350 IT CYCLED 500 TO +500 TIL FL380 THEN STABILIZED AT 7000 CABIN ALT. INITIAL EVAL SHOWS NO FAULTS ON DCPC OR DCPC NR 2 NO EXISTING FAULTS OR FAULTS IN HISTORY. FOLLOWED FIM TASK 21 31 00 810 801 AND PERFORMED PRESSURIZATION GROUND TEST 21 31 00 700 802 TESTS GOOD NO HISTORY 60 DAYS.