SDR ASAA2014062708368

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

Difficulty date: June 27, 2014
Submitted: June 30, 2014
Operation: Air carrier
Aircraft: N413AS
Make and model: Boeing 737990ER
Aircraft serial: 352054764
Aircraft time: 5,116 hours, 1,605 cycles
System (JASC): 2150 · Cabin Cooling System
Part: A/C Pack
Condition: Malfunctioned
Stage of operation: NR
How discovered: 9
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

BOTH COCKPIT AND FWD CABIN TEMP CONTROLS APPEAR INOPERATIVE AND AT FULL COLD. ONCE ON THE GROUND AFTER BLOCK IN AT DIRECTION OF MAINTENANCE CONTROL, SELECTING TRIM AIR OFF, THEN OPS-NORMAL. ACFT GROUNDED. PERFORMED BITE CHECK OF BOTH ZONE TEMP CONTROLLERS, REF AMM 21-61-00, NO FAULTS FOUND. NO HISTORY PAST 30 DAYS. PERFORMED OPS CHECK, SYSTEM OPS NORMAL, OK FOR SERVICE.