SDR ASAA2018032624040

Service difficulty report · Actuator · Boeing 737890

Difficulty date: March 26, 2018
Submitted: March 27, 2018
Operation: Air carrier
Aircraft: N565AS
Make and model: Boeing 737890
Aircraft serial: 35181
Aircraft time: 43,572 hours, 13,167 cycles
System (JASC): 2150 · Cabin Cooling System
Part: Actuator
Condition: Failed
Location: Lt Ram Air
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 DURING MASTER CAUTION CHECK. LIGHT EXTINGUISHED WHEN MASTER CAUTION IS RESET. MASTER CAUTION AND AIR COND ALSO EXTINGUISH WHEN MASTER CAUTION IS RESET. ACFT GROUNDED. PERFORMED A PACK/ZONE TEMP CONTROLLER BITE TEST IAW AMM 21-61-00-700-806-002. LT PACK RAM AIR ACTUATOR FAULT. R & R THE LT PACK RAM AIR INTAKE ACTUATOR IAW AMM 21-51-21. OPS CHECKED GOOD. PACK/ZONE TEMP CONTROLLER BITE TESTED GOOD. NO FAULTS ON MASTER CAUTION CHECK.