SDR ASAA2018021623583

Service difficulty report · Actuator · Boeing 737990ER

Difficulty date: February 16, 2018
Submitted: February 21, 2018
Operation: Air carrier
Aircraft: N433AS
Make and model: Boeing 737990ER
Aircraft serial: 41704
Aircraft time: 17,122 hours, 5,647 cycles
System (JASC): 2150 · Cabin Cooling System
Part: Actuator
Part number: 676000141
Part serial: 67600014765
Condition: Malfunctioned
Location: Lt Ram Air
Part time: 17,138 hours, 5,653 cycles
Stage of operation: CR
How discovered: 9
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

DURING M/C RECALL DURING CRUISE, FL 280, THE LEFT PACK LIGHT ILLUMINATED. RESET TO OFF WITH M/C RESET, LIGHT PRESSED. ACFT GROUNDED. IAW TSR701458, REPLACED BOTH LT RAM AIR INLET DOOR ACTUATOR, AND LT RAM AIR EXHAUST DOOR ACTUATOR, AND ACCOMPLISHED A PACK/ZONE TEMP CONTROLLER BITE TEST, OPS NORMAL IAW AMM 21-61-00-740-801-002.