Service difficulty report · Actuator · Boeing 737990ER

Difficulty date
December 28, 2020
Submitted
December 30, 2020
Operation
Air carrier
Aircraft
N409AS
Make and model
Boeing 737990ER
Aircraft serial
41733
Aircraft time
28,996 hours, 9,375 cycles
Part
Actuator
Part number
5416744
Part serial
12877
Condition
Faulted
Location
Lt Ram Air Inlet
Part time
43,713 hours, 13,035 cycles
Stage of operation
NR
How discovered
V
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. EXTINGUISHED WHEN MASTER CAUTION LIGHT IS RESET. GROUNDED-YES. ACCOMPLISHED NR 1 PACK TEMP CONTROL BITE AND HAD RAM AIR ACTUATOR FAULT, REF B737-900 FIM 21-62 TASK 801. REMOVED AND REPLACED LT RAM AIR INLET ACTUATOR, REF B737-900 AMM 21-51-21. OPERATIONS CHECK GOOD WITH NO FAULTS FOUND. GROUND VERIFICATION SUCCESSFUL.