# SDR ASAA2023081444601

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 14, 2023
- Submitted: August 17, 2023
- Operation: Air carrier
- Aircraft: [N920AK](https://openairdocs.org/aircraft/N920AK), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 44086
- Aircraft time: 7,035 hours, 2,090 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Controller
- Part number: 51090322002
- Part serial: 5109032201435
- Condition: Faulty
- Location: E/E Shelf E3-3
- Part time: 6,286 hours, 1,982 cycles
- Stage of operation: AP
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023081444601

## Discrepancy

ON APPROACH & LANDING & TAXI IN LEFT DUCT PRESSURE SWUNG BETWEEN 0 AND 65 PSI MULTIPLE TIMES UNTIL ENGINE SHUTDOWN. GROUNDED - YES. REMOVED AND REPLACED L IASC REF MM 21-61-22, ALL TESTS PASSED. ACTIVE IASC MESSAGE CLEARED. THIS CLEARS MEL 21-51-02B, C/N REMOVED,SEAMC DARREN NOTIFIED.

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