SDR ASAA2020012631978

Service difficulty report · Controller · Boeing 737890

Difficulty date: January 26, 2020
Submitted: January 29, 2020
Operation: Air carrier
Aircraft: N588AS
Make and model: Boeing 737890
Aircraft serial: 35685
Aircraft time: 46,437 hours, 13,906 cycles
System (JASC): 2150 · Cabin Cooling System
Part: Controller
Condition: Failed
Location: A/C Pack
Stage of operation: TX
How discovered: O
Nature of condition: J
Precautionary procedure: O

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

What was found

PERFORMED RECALL AFTER PUSHBACK ACCOMPLISHED AFTER START CHECKLIST AND GOT AIR CONDITION LIGHT AND ASSOCIATED RIGHT PACK LIGHT. PRESSED MASTER CAUTION LIGHT, PACK LIGHT AND AIR CONDITION LIGHT EXTINGUISHED, INIDICATING PRIMARY OR SECONDARY PACK CONTROLLER FAILED. GROUNDED - YES. ACCOMPLISHED BITE TEST IAW AMM 21-61-00-700-8067-002. BIT & PREV FLT INDICATED TCV FAULT. FAULT RESET. RAN TEST SEVERAL TIMES WITH A GO RESULT. OP TESTED GOOD IAW AMM TASK 21-61-00-700-807-002.