SDR ASAA2015010810186

Service difficulty report · A/C Pack · Boeing 737890

Difficulty date: January 8, 2015
Submitted: January 12, 2015
Operation: Air carrier
Aircraft: N535AS
Make and model: Boeing 737890
Aircraft serial: 35200
Aircraft time: 15,590 hours, 4,571 cycles
System (JASC): 2160 · Cabin Temperature Control System
Part: A/C Pack
Condition: Malfunctioned
Location: Cabin Temp
Stage of operation: NR
How discovered: O
Nature of condition: O
Precautionary procedure: O

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

What was found

DIFFICULT TO CONTROL COCKPIT AIR TEMP IN AUTO. ACFT GROUNDED. ACCOMPLISHED BITE TEST OF CABIN TEMP CONTROLLERS, TEST PASS. ACCOMPLISHED FIM 21-61, TASK 861, OPS CHECKED GOOD. FAULT WAS INTERMITTENT IAW STEP I, 6. NO HISTORY LAST 90 DAYS.