# SDR CALA2026040115009

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 29, 2026
- Submitted: April 1, 2026
- Operation: Air carrier
- Aircraft: [N16703](https://openairdocs.org/aircraft/N16703), registered now
- Make and model: Boeing 737724
- Aircraft serial: 28764
- Aircraft time: 84,790 hours, 31,418 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Acm
- Part number: 22064002
- Part serial: 10283
- Condition: Faulted
- Location: Right
- Part time: 32,306 hours, 13,083 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/CALA2026040115009

## Discrepancy

PACK TRIP OFF LIGHT LIGHT ON DURING CLIMB, LIGHT STAYS OFF AFTER RESET RIGHTAPPLYING MEL FAULT NUMBER 030. LO INFL/HI LEAKG IS DISPLAYED ON NR 2 CABIN PRESSURE CONTROLLER PACK TRIP 30 SECONDS AFTER TURNED ON. NO AIRFLOW FROM PACK EXHAUST SUSPECT BAD ACM.  CREW REPORTED PROBLEMS ON INBOUND FLIGHT. MCDU ECS DESCRETES SHOWS RT PACK OFF.  REMOVED AND STOWED D492 CONNECTOR. C SOLENOID VERIFIED IN. JUMPER NOT INSTALLED.  REMOVED AND REPLACED ACM IAW AMM 21-51-04 UP TO STEP H 6, AND REINSTALLED LOW PRESSURE WATER SYSTEM MIX MUFF IAW AMM 21-51-09.

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