SDR ASAA2017083121765

Service difficulty report · Warning Light · Boeing 737990ER

Difficulty date: August 31, 2017
Submitted: September 1, 2017
Operation: Air carrier
Aircraft: N408AS
Make and model: Boeing 737990ER
Aircraft serial: 41732
Aircraft time: 18,937 hours, 6,143 cycles
System (JASC): 2150 · Cabin Cooling System
Part: Warning Light
Condition: False Activation
Location: Rt A/C Pack
Stage of operation: TX
How discovered: O
Nature of condition: N
Precautionary procedure: D

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

What was found

DURING TAXI, THE RIGHT PACK LIGHT ILLUMINATED. FOLLOWED QRH CHECKLIST. UNABLE TO RESET PACK. LIGHT DID NOT EXTINGUISH WITH MASTER CAUTION RESET. TEMP OUT OF PACK WAS ERRATIC. ACFT GROUNDED. PERFORMED BITE ON RIGHT PACK, ZONE TEMP CONTROLLER. INITIALLY SHOW TCV FAULT ON RECENT HISTORY. RIGHT PACK LIGHT ABLE TO BE RESET AFTER RUNNING THROUGH BITE. TESTED GOOD IAW FIM 21-62, TASK 801. PERFORMED RT PACK OPERATION TO VERIFY PACK LIGHT RESET. OPS CHECKED GOOD, NO FAULTS IAW AMM 21-00-00.