SDR CALA2022112503229

Service difficulty report · A/C Pack · Boeing 757224

Difficulty date: November 25, 2022
Submitted: November 25, 2022
Operation: Air carrier
Aircraft: N12109
Make and model: Boeing 757224
Aircraft serial: 27299
Aircraft time: 104,578 hours, 24,435 cycles
System (JASC): 2150 · Cabin Cooling System
Part: A/C Pack
Condition: Failed
Location: Left & Right
Stage of operation: CR
How discovered: O
Nature of condition: J
Precautionary procedure: A

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

What was found

RAPID DEPRESSURIZATION DUE TO R AND L PACK FAIL ALSO R ENG BLEED OFF. THE 450 TEMP SENSOR PASSED THE HEALTH CHECK WITH NO ISSUES. REPLACED #1 HI STAGE PILOT. COMPLETED INSTALLATION AND OPERATIONAL CHECKS. R&R RT PACK COMPRESSOR OUTLET TEMP SENSOR. BITE PASS. COMPLETED SINGLE PACK PRESSURIZATION OPERATIONL CHECKS. FINISHED HEALTH CHECK OF PRSOV AND ACP HPSOV,HS PILOT AND FAMV HEALTH CHECKS ALL FOUND TO BE SATISFACTORY.