# SDR CALA2026020613620

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 3, 2026
- Submitted: February 6, 2026
- Operation: Air carrier
- Aircraft: [N12754](https://openairdocs.org/aircraft/N12754), registered now
- Make and model: Boeing 737724
- Aircraft serial: 30464
- Aircraft time: 70,534 hours, 27,443 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Acm
- Part number: 22064002
- Part serial: 491063
- Condition: Failed
- Location: Left
- Part time: 79,391 hours, 29,631 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026020613620

## Discrepancy

LEFT PACK TRIPPED OFF AT GATE,  FLIGHT DECK TEMP CONTROL INOPERATIVE IN AUTO AND MANUAL MODES.   MEL 2101A LT PACK INOPERATIVE.  PERFORMED FIM 21-52 TASK 828. FOUND NO AIRFLOW AT THE EXHAUST DUCT OUTLET OF THE LT RAM AIR SYS. FOUND THE ACM NOT SPINNING & A BLADE MISSING. REMOVED AND REPLACED THE LT ACM IAW AMM 21-51-04-401 UP TO AND INCLUDING STEP G(3)H, AND FROM G(3)M TO G(5)E, INLET FLANGE WAS FOUND DAMAGED.  INSTALLED A NEW INLET FLANGE & CONTINUED WITH INSTALLATION OF LT ACM FROM STEP G(5)E TO COMPLETION IAW AMM 21-51-04. OPS & LEAK CHECKED GOOD. OK TO CONTINUE.

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