SDR ASAA2013040994432

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

Difficulty date: April 9, 2013
Submitted: April 12, 2013
Operation: Air carrier
Aircraft: N419AS
Make and model: Boeing 737990ER
Aircraft serial: 41734
Aircraft time: 73 hours, 27 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

(ROW 8-15) FWD PART OF THE COACH CABIN RUNS VERY WARM AS COMPARED TO THE REST OF THE ACFT. TO MAKE THIS AREA OF THE CABIN COMFORTABLE THE REST OF THE CABIN HAD TO BE MUCH TOO COLD. COULD NOT DUPLICATE, RAN BOTH PACKS & SET ALL 3 ZONE SELECTORS AT UNIFORM TEMP, CABIN OUTPUT WAS EQUAL FRONT TO BACK. DROPPED CEILING PANEL IN AFFECTED AREA - NO ANOMALIES NOTED. BOTH ZONE TEMP CONTS CHECKED NORMAL REF 21-61-00.