SDR ASAA2020010931811

Service difficulty report · Warning System · Boeing 737990ER

Difficulty date: January 7, 2020
Submitted: January 10, 2020
Operation: Air carrier
Aircraft: N459AS
Make and model: Boeing 737990ER
Aircraft serial: 36352
Aircraft time: 23,360 hours, 7,512 cycles
System (JASC): 2150 · Cabin Cooling System
Part: Warning System
Condition: False Activation
Location: Cockpit
Stage of operation: DE
How discovered: O
Nature of condition: N
Precautionary procedure: K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

AT TOP OF DESCENT, PACK LIGHT, RIGHT, ILLUMINATED ON RECALL. GROUNDED - YES. PERFORMED SYSTEM BITE TEST REF B737-900 AMM 21-61-00. BITE TEST GOT A GREEN LIGHT, PREV FLT SHOWED SRADA EXIT FAIL LIGHT, VERIFICATION TEST PASSED. RESET SYSTEM AND RE-RAN SYSTEM TEST. SYSTEM OP CHECK GOOD.