SDR 2005UALA01136

Service difficulty report · Odor · Boeing 777222

Difficulty date: October 13, 2005
Submitted: October 18, 2005
Operation: Air carrier
Aircraft: N779UA
Make and model: Boeing 777222
Aircraft serial: 26941
Aircraft time: 37,092 hours, 7,109 cycles
Engine: Pwa PW4077
System (JASC): 2120 · Air Distribution System
Part: Odor
Condition: Detected
Location: Cabin
Stage of operation: NR
How discovered: 9
Nature of condition: B
Precautionary procedure: O

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

What was found

ELECTRICAL BURNING SMELL AND HUMMING NOISE FROM DOOR 2 AFT CHILLER. MANUFACTURER REPORTS COMPRESSOR CRUSH WASHERS RELIEVED, ALLOWING RELEASE OF REFRIGERANT AND OIL. NO CAUSE FOR OVERPRESSURE FOUND. MANUFACTURER REPORTS PERIOD OF QUALITY DEPARTURE DESCRIBED AS INCORRECT USE OF INSTALLATION TOOL. THIS UNIT WAS MANUFACTURED DURING THAT PERIOD AND BELIEVED TO BE SUBJECT TO THE REPORTED FAILURE AS A RESULT.