SDR ASAA2016040316221

Service difficulty report · Controller · Boeing 737990ER

Difficulty date: April 3, 2016
Submitted: April 5, 2016
Operation: Air carrier
Aircraft: N433AS
Make and model: Boeing 737990ER
Aircraft serial: 41704
Aircraft time: 9,737 hours, 3,126 cycles
System (JASC): 2150 · Cabin Cooling System
Part: Controller
Condition: Malfunctioned
Location: Lt 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

LEFT PACK LIGHT ON AFTER RECALL, AFTER START. ACFT GROUNDED. PERFORMED PACK/ZONE TEMP CONTROLLER BITE TEST ON BOTH CONTROLLERS, REF AMM 21-61-00, TCV REF LIGHT ILLUMINATED. RESET THE PACK/ZONE TEMP CONTROLLERS. RAN LT PACK ON HIGH FOR 5 MINUTES, NO FAULTS. PERFORMED PACK/ZONE TEMP CONTROLLER BITE TEST, REF AMM 21-61-00, NO FAULTS. FOUND THE FAULT TO BE INTERMITTENT.