Service difficulty report · Warning Light · Boeing 737890

Difficulty date
February 19, 2016
Submitted
February 22, 2016
Operation
Air carrier
Aircraft
N558AS
Make and model
Boeing 737890
Aircraft serial
35177
Aircraft time
37,048 hours, 10,855 cycles
Part
Warning Light
Condition
False Activation
Location
Lt A/C Pack
Stage of operation
NR
How discovered
9
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

LEFT PACK LIGHT ILLUMINATES DURING RECALL, EXTINGUISHES WHEN MASTER CAUTION IS RESET. ACFT GROUNDED. LEFT PACK, ZONE TEMP CONTROL BITE SHOWS RAM AIR ACTUATOR FAULT WITH BIT SWITCH. VERIFY SWITCH TEST PASSES. REF FIM 21-62, TASK 801. RESET FAULT AND OPERATED LT PACK FOR SEVERAL MINUTES REF AMM 21-00-00. PACK, ZONE TEMP CONTROLLER BITE TEST PASSED. NO FAULTS LOGGED DURING BITE. OPS NORMALLY.