SDR ASAA2018070225239

Service difficulty report · Controller · Boeing 737990ER

Difficulty date: June 30, 2018
Submitted: July 2, 2018
Operation: Air carrier
Aircraft: N402AS
Make and model: Boeing 737990ER
Aircraft serial: 41189
Aircraft time: 22,406 hours, 7,385 cycles
System (JASC): 2161 · Cabin Temperature Controller
Part: Controller
Condition: Malfunctioned
Location: Ac Bay
Stage of operation: DE
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

ON DESCENT CHECKLIST AND RECALL RIGHT PACK LIGHT STAY ILLUMINATED. RAN QRH AND LIGHT EXT. WHEN RESET MASTER CAUTION. GROUNDED - YES. PERFORMED PACK ZONE/TEMP CONTROLLER BITE TEST ON NR 1 & NR 2 CONTROLLER PER AMM 21-61-00-700-806-002. NR 2 CONTROLLER SHOWS RT PACK TCV FAULT ILLUMINATED, RESET NR 2 TEMP CONTROLLER, RT PACK TCV LIGHT EXTINGUISHED. ON RECALL, PACK LIGHT, RT SIDE STAYED EXTINGUISHED, NO HISTORY PAST 30 DAYS.