SDR ASAA2016102618485

Service difficulty report · Warning Message · Boeing 737890

Difficulty date: October 26, 2016
Submitted: October 28, 2016
Operation: Air carrier
Aircraft: N519AS
Make and model: Boeing 737890
Aircraft serial: 36482
Aircraft time: 29,735 hours, 8,921 cycles
System (JASC): 2150 · Cabin Cooling System
Part: Warning Message
Condition: False Activation
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

LEFT PACK LIGHT ILLUMINATED WHEN CHECKING MASTER CAUTION . LIGHT EXTINGUISHED WHEN PRESSING MASTER CAUTION RESET. AIR COND LIGHT ILLUMINATED ON MASTER CAUTION PANEL. ACFT GROUNDED. CONFIRMED LEFT PACK LIGHT ILLUMINATED ON RECALL. PERFORMED PACK TEMP CONTROL BITE TEST, IAW AMM 21-61-00. FOUND NR 1 RAM AIR ACTUATOR FAULT ON PREVIOUS FLIGHT. RESET FAULTS. REPEAT TEST AND NO FAULTS. NO FAULTS ON RECALL. RUN PACKS AND NO FAULTS. REPEAT CONTROL BITE TEST AND OPS CHECK NORMAL.