SDR ASAA2015070112304

Service difficulty report · Valve · Boeing 737990ER

Difficulty date: July 1, 2015
Submitted: July 7, 2015
Operation: Air carrier
Aircraft: N431AS
Make and model: Boeing 737990ER
Aircraft serial: 43255
Aircraft time: 6,730 hours, 2,211 cycles
System (JASC): 2150 · Cabin Cooling System
Part: Valve
Part number: 3989083
Part serial: 9165
Condition: Malfunctioned
Location: Rt A/C Pack
Part time: 27,393 hours, 9,603 cycles
Stage of operation: AP
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

MASTER CAUTION AND RT PACK LIGHT ILLUMINATED ON SHORT FINAL. ACFT GROUNDED. REPLACED CONNECTOR, D3872 IAW WDM 21-52-22 AND TEMPERATURE CONTROL VALVE, PRECAUTIONARY, IAW MM 21-51-10-000-801/21-51-10-400-801. PERFORMED TEMP CONTROL VALVE INSTALLATION TEST IAW MM 21-51-10-400-801, PARA E. INSTALLATION TEST IS GOOD. PERFORMED PACK TEMP CONTROL BITE TEST IAW FIM 21-62, TASK 801, NO FAULTS NOTED.