SDR ASAA2021041034537

Service difficulty report · Warning Light · Boeing 737890

Difficulty date: April 10, 2021
Submitted: April 12, 2021
Operation: Air carrier
Aircraft: N597AS
Make and model: Boeing 737890
Aircraft serial: 35689
Aircraft time: 47,314 hours, 14,228 cycles
System (JASC): 2150 · Cabin Cooling System
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 ILLUMINATES ON RECALL. GROUNDED - YES. ACCOMPLISHED B737-800 FIM 21-53 TASK 801. SHOW TCV FAULT, AFTER RESET PZTC #1, LEFT PCK LIGHT NOT ACTIVE WITH RECALL TEST, OPS BOTH L& R PACK FOR SEVERAL MINUTES TO FULL COOL AND FULL WARM, RECALL TEST AND BOTH L & R PZTC BITE PASSED, B737-800 AMM 21-00-00.