SDR ASAA2018080635655

Service difficulty report · Warning Light · Boeing 737990ER

Difficulty date: August 3, 2018
Submitted: August 6, 2018
Operation: Air carrier
Aircraft: N468AS
Make and model: Boeing 737990ER
Aircraft serial: 41735
Aircraft time: 16,347 hours, 5,447 cycles
System (JASC): 2130 · Cabin Pressure Control System
Part: Warning Light
Condition: False Activation
Location: Cabin Pressure
Stage of operation: CR
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

DURING CRUISE, FL 360, IN CONT TURB, AUTO FAIL LIGHT ILLUMINATED ON PRESSURE CONTROL PANEL. QRH APPLIED, ALTERNATE OPS NORMAL. ACFT GROUNDED. PERFORMED FIM 21-31, TASK 827/824, DCPC NR 1 BITE, NO FAULTS. DCPC NR 2 SHOWS FAULT CODE 057, CONTROL LRU FAIL ON LEG 00. CYCLED SELECTOR FROM MANUAL TO AUTO, AUTO FAIL LIGHT EXTINGUISHED. OPS TESTED NORMAL. NO HISTORY LAST 60 DAYS, GROUND VERIFICATION GOOD.