# SDR CALA2026080718360

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 3, 2026
- Submitted: August 7, 2026
- Operation: Air carrier
- Aircraft: [N86534](https://openairdocs.org/aircraft/N86534), registered now
- Make and model: Boeing 737824
- Aircraft serial: 62750
- Aircraft time: 31,060 hours, 11,802 cycles
- Engine: Cfmint CFM567B27
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Condition: Faulted
- Location: Rt Acm
- Part time: 77,604 hours, 27,458 cycles
- Stage of operation: NR
- How discovered: O
- Nature of condition: B, J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026080718360

## Discrepancy

RIGHT PACK LIGHT ILLUMINATED.  AFTER ENG SHUTDOWN AT GATE.  OPENED ECS RT PACK BAY, BURNED OIL ODOR PRESENT. TROUBLESHOT DOWN TO RT PACK, WITH PACK OFF,  NO ODOR PRESENT.  MEL 2101B APPLIED FOR RT PACK INOP.  FIM 21-00 TASK 801 FOR RT PACK WARNING LIGHT ON,  AFTER REVERSING MEL.  PACK FLOW SENSOR MESSAGE 21-51239 AFTER BITE TEST. NEED TO REPLACED RT PACK FLOW SENSOR IAW FIM 21-53 TASK 821.   DEACTIVATED RT PACK AFTER TEST. COMPLIED WITH MEL 2101B.   COMPLY WITH FIM 21-00 TASK 801, DUE TO ODOR PRESENT.  REPLACED RT PACK FLOW SENSOR. RAN INTIAL GROUND TEST, TEST PASSED. RAN RT PACK.  PACK RAN FOR 3 MINS BEFORE KICKING OUT. RESET A/C SYS & RAN TEST AGAIN. S YSTEM FAULTED AGAIN. PERFORMED GROUND TEST,  THIS TIME TEST FAILED & 2 FAULTS WERE PRESENT.  FAULTS INDICATED FAULTY ZONE TEMP CONTROL VALVE.  VALVE HAS HISTORY OF BEING CHANGED BACK ON 7/30. REPLACED THE RT PACK FLOW SENSOR. . RAN INTIAL GROUND TEST, TEST PASSED.

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