Service difficulty report · Actuator · Boeing 737990ER

Difficulty date
April 4, 2017
Submitted
April 6, 2017
Operation
Air carrier
Aircraft
N478AS
Make and model
Boeing 737990ER
Aircraft serial
44105
Aircraft time
7,138 hours, 2,377 cycles
Part
Actuator
Part number
676000141
Part serial
676000143197
Condition
Failed
Location
Lt Ram Air
Part time
7,138 hours, 2,377 cycles
Stage of operation
NR
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, EXTINGUISHED ON RESET. ACFT GROUNDED. PERFORMED LT PACK ZONE TEMP CONTROLLER BITE IAW AMM 21-61-00. FAULTING EXIT RAM AIR ACTUATOR. REMOVED AND REPLACED LT RAM AIR EXHAUST ACTUATOR IAW AMM 21-51-27. ALL TESTS PASSED. NO NEW OR CURRENT FAULTS.