SDR ASAA2016071517378

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

Difficulty date: July 15, 2016
Submitted: July 18, 2016
Operation: Air carrier
Aircraft: N402AS
Make and model: Boeing 737990ER
Aircraft serial: 41189
Aircraft time: 14,590 hours, 4,738 cycles
System (JASC): 2160 · Cabin Temperature Control System
Part: A/C Pack
Condition: Unknown
Stage of operation: CR
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

F/A REPORTED INCONSISTENT HEAT & COOLING IN AFT CABIN FRONT TO BACK AND SIDE TO SIDE. AFTER 5 HOUR FLIGHT, UNABLE TO FIND SETTING TO SATISFY AFT CABIN. ACFT GROUNDED. ACCOMPLISHED CABIN TEMP CONTROL & INDICATION TEST IAW AMM 21-61-00-700-807-002. OPS CHECKED GOOD THROUGHOUT THE ENTIRE PLANE. ACCOMPLISHED PACK - ZONE TEMP CONTROLLER BITE TEST IAW AMM 21-61-00-700-806-002. NO FAULTS WERE LOGGED.