SDR ASAA2015112914021

Service difficulty report · Actuator · Boeing 737990ER

Difficulty date: November 29, 2015
Submitted: December 3, 2015
Operation: Air carrier
Aircraft: N435AS
Make and model: Boeing 737990ER
Aircraft serial: 43292
Aircraft time: 8,217 hours, 2,692 cycles
System (JASC): 2150 · Cabin Cooling System
Part: Actuator
Part number: 676000141
Part serial: 67600014588
Condition: Failed
Location: Ram Air
Part time: 7,988 hours, 2,609 cycles
Stage of operation: CR
How discovered: O
Nature of condition: O
Precautionary procedure: O

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

What was found

LEFT RAM DOOR FULL OPEN LIGHT REMAINED ILLUMINATED ENTIRE FLIGHT. ACFT GROUNDED. CONFIRMED FAULT, LT PACK/ZONE TEMP CONTROLLER SHOWS RAM AIR ACTUATOR FAULT. R & R, FWD, LT RAM AIR INLET ACTUATOR REF AMM TASK 21-51-21 & INSTALLED, AFT, LT RAM AIR EXHAUST ACTUATOR REF AMM TASK 21-51-27. GROUND FUNCTIONAL CHECK NORMAL, REF AMM TASK 21-61-00-700-806-002 "PACK/ZONE TEMPERATURE CONTROLLER BITE TEST".