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SDR AALA202208250232

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Service difficulty report · Converter · Boeing 777

FAA SDR system

Difficulty date
August 19, 2022
Submitted
August 25, 2022
Operation
Air carrier
Aircraft
N797AN
Make and model
Boeing 777
Aircraft serial
30012
Aircraft time
83,887 hours, 10,894 cycles
System (JASC)
2120 · Air Distribution System
Part
Converter
Part number
23415901
Condition
Contaminated
Location
Zone 100 - Fuse
Stage of operation
DE
How discovered
O
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

AIRCRAFT WAS GROUNDED: NOXIOUS MUSTY SMELL IN COCKPIT STARTING AT IDLE DESCENT. **SUPPLEMENTAL REPORT FOR AALA202208227474: ACCOMPLISHED SMOKE ODOR FUME INITIAL TROUBLESHOOTING JOB CARD 72L00021001. APU FOUND TO BE SOURCE OF ODOR DUE TO OIL LEAK BETWEEN APU AND LOAD COMPRESSOR AIR DUCT. REPLACED APU PER JOB CARD 72L31049008 (AALA202208227474). REPLACED LEFT AND RIGHT PACK OZONE CONVERTER PER AMM 21-73-01 (AALA202208250232, AALA202208250079). REPLACED LEFT AND RIGHT PACK DUAL HEAT EXCHANGER PER AMM 21-52-01 (AALA202208252418, AALA202208254929). REPLACED LEFT AND RIGHT PACK CONDENSER / RE-HEATER PER AMM 21-52-03 (AALA202208259267, AALA202208257274). REPLACED LEFT AND RIGHT PACK AIR CYCLE MACHINE PER AMM 21-52-02 (AALA202208253611, AALA202208259287). REPLACED FLIGHT DECK AIR DISTRIBUTION DUCT FORWARD AND AFT MUFFLER PER AMM 21-22-01 (AALA202208255436, AALA202208252568).** (CLOSED)