Service difficulty report · Warning Message · Boeing 737890

Difficulty date
November 5, 2015
Submitted
November 9, 2015
Operation
Air carrier
Aircraft
N508AS
Make and model
Boeing 737890
Aircraft serial
35691
Aircraft time
27,923 hours, 8,545 cycles
Part
Warning Message
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

AUTO FAIL LIGHT ILLUMINATED AT FL 360. SWITCHED TO ALTN IAW CHECKLIST. AUTO FAIL LIGHT EXTINGUISHED. PRESSURIZATION NORMAL IN ALTN MODE. ACFT GROUNDED. REF FIM 21-31, TASK 801. PERFORMED CPC BITE TEST ON BOTH NR 1 AND NR 2 CONTROLLERS. FOUND NO FAULTS ON NR 2. FOUND FAULT CODE 32 ON NR 1. CLEARED FAULTS AND BITE CHECK NOW PASSED.