Service difficulty report · Actuator · Boeing 737990ER

Difficulty date
October 19, 2017
Submitted
October 23, 2017
Operation
Air carrier
Aircraft
N413AS
Make and model
Boeing 737990ER
Aircraft serial
35205
Aircraft time
18,387 hours, 5,980 cycles
Part
Actuator
Part number
5416744
Part serial
038
Condition
Faulted
Location
Lt Ram Air Inlet
Part time
13,123 hours, 4,376 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 WITH MASTER CAUTION RESET. ACFT GROUNDED. PERFOMED BITE CHECK OF THE NR 1 AND 2 ZONE TEMP CONTROLLERS. FOUND THE NR 1 CONTROLLER FAULT FOR LEFT RAM ACTUATOR FAULT IAW FIM 21-62, 801. REMOVED AND REPLACED THE LEFT RAM AIR INLET ACTUATOR IAW AMM 21-51-21-000-801, AND 21-51-21-400-801. RAM AIR ACTUATOR OPS CHECKED GOOD. PERFOMED BONDING CHECK OF LEFT RAM AIR INLET ACTUATOR, BONDING CHECKED GOOD IAW AMM 21-51-21.