Service difficulty report · Warning Message · Boeing 737890

Difficulty date
January 28, 2018
Submitted
January 30, 2018
Operation
Air carrier
Aircraft
N590AS
Make and model
Boeing 737890
Aircraft serial
35687
Aircraft time
38,414 hours, 11,622 cycles
Part
Warning Message
Condition
False Activation
Location
Master
Stage of operation
NR
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

MASTER CAUTION OVERHEAD & PACK LIGHTS ILLUMINATED. RESET MASTER CAUTION AND ALL CAUTION LIGHTS EXTINGUISHED. ACFT GROUNDED. THE NR 1 PACK/TEMP CONTROLLER SHOWS RAM AIR ACTUATOR FAULT ON BIT TEST. PREV FLT & VERIFY PASSED. RESET FAULT. FAULT DID NOT RETURN. BITE TESTED GOOD. IAW FIM 21-62, TASK 837.