SDR ASAA2019010127646

Service difficulty report · Actuator · Boeing 737890

Difficulty date: January 1, 2019
Submitted: January 8, 2019
Operation: Air carrier
Aircraft: N558AS
Make and model: Boeing 737890
Aircraft serial: 35177
Aircraft time: 47,580 hours, 14,060 cycles
System (JASC): 2150 · Cabin Cooling System
Part: Actuator
Condition: Faulted
Location: Ram Air
Stage of operation: NR
How discovered: O
Nature of condition: J
Precautionary procedure: K

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

What was found

LEFT PACK LIGHT ON, ON RECALL. GROUNDED - YES. ON DEFERRAL. INITIALLY ACCOMPLISHED PACK CONTROL BITE TEST PER FIM 21-62 TASK 801. FOUND LT RAM AIR ACTUATOR FAULTED. REMOVED & REPLACED LT RAM AIR ACTUATOR PER AMM 21-51-21. OPS CHECK GOOD. DUE TO HISTORY ALSO REMOVED AND REPLACED PRECAUTIONARY THE LT TEMP CONTROL VALVE REF AMM 21-51-10. OPS AND LEAK CHECK GOOD. RE-ACCOMPLISHED PACK CONTROL BITE TEST AND FOUND NO FAULTS AT THIS TIME.