SDR ASAA2016092118095

Service difficulty report · A/C Pack · Boeing 737990ER

Difficulty date: September 21, 2016
Submitted: September 23, 2016
Operation: Air carrier
Aircraft: N453AS
Make and model: Boeing 737990ER
Aircraft serial: 36354
Aircraft time: 10,889 hours, 3,530 cycles
System (JASC): 2150 · Cabin Cooling System
Part: A/C Pack
Condition: Malfunctioned
Location: Left
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 RECALL. LIGHT EXTINGUISHES WHEN THE MASTER CAUTION SYSTEM IS RESET. ACFT GROUNDED. ACCOMPLISHED LEFT PACK TEMP CONTROL BITE, IAW 21-61-00. FOUND FAULT LEFT RAM AIR SENSOR LOGGED ONE TIME IAW FIM 21-62 TASK 821. CLEARED FAULT, GROUND RAN LEFT PACK FOR 1 HOUR. NO FAULTS NOTED. ACCOMPLISHED LEFT PACK TEMP CONTROL BITE AGAIN, IAW FIM 21-62 TASK 801.