SDR AALA2019101439007

Service difficulty report · Warning Light · Boeing 737823

Difficulty date: October 11, 2019
Submitted: November 26, 2019
Operation: Air carrier
Aircraft: N936NN
Make and model: Boeing 737823
Aircraft serial: 31176
Aircraft time: 19,256 hours, 7,927 cycles
System (JASC): 2130 · Cabin Pressure Control System
Part: Warning Light
Condition: False Activation
Location: Cabin Pressure
Stage of operation: DE
How discovered: O
Nature of condition: N
Precautionary procedure: O

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

What was found

AIRCRAFT WAS GROUNDED: DESCENDING TO 3,000 THE AUTO FAIL AND ALTN PRESSURIZATION LIGHTS ILLUMINATED. PERFORMED PRESSURIZATION SYS. 1 AND 2 ADJUSTMENT AND TEST IAW AMM 21-31-00 . OK FOR SERVICE IAW AMM 21-31-00. CLIMBING THROUGH 7000 AUTO PRESSURIZATION CONTROL AUTO FAIL LIGHT AND ALTN LIGHTS ILLUMINATED. MAINTENANCE ACCOMPLISHED AMM TASK 21-31-00-700-802 BITE TEST ON BOTH PRESSURE CONTROLLERS, NO FAULTS NOTED TEST OK AUTO FAIL LIGHT EXTINQUISHED SYSTEM OK FOR SERVICE IAW AMM 21-31-00.