SDR ASAA2013052994928

Service difficulty report · Actuator · Boeing 737890

Difficulty date: May 29, 2013
Submitted: May 31, 2013
Operation: Air carrier
Aircraft: N570AS
Make and model: Boeing 737890
Aircraft serial: 35185
Aircraft time: 24,357 hours, 7,262 cycles
System (JASC): 2150 · Cabin Cooling System
Part: Actuator
Condition: Faulted
Location: Ram Air Door
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 ILLUMINATED ON RECALL AND GOES OUT ON MASTER CAUTION, RESET. ACFT GROUNDED. CONFIRMED LT PACK, PERFORMED BITE TEST OF NR 1 & NR 2 PACK/ZONE TEMP CONTROLLERS IAW AMM 21-61-00. FOUND RAM AIR ACTUATOR FAULT ON NR 1 CONTROLLER. FAULT RESET UPON TEST COMPLETION & SUBSEQUENT TESTS. ALL OPS NORMAL - NO DEFECTS. LT PACK LIGHT REMAINS EXTINGUISHED ON MASTER RECALL. NO HISTORY OF RAM AIR ACT FAULT LT LAST 30 DAYS. ETOPS GND VERIFICATION SUCCESSFUL.