# SDR SIMA20241018001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 18, 2024
- Submitted: October 21, 2024
- Operation: Air carrier
- Aircraft: [N781EJ](https://openairdocs.org/aircraft/N781EJ), registered now
- Make and model: Emb ERJ 170-100SU
- Registry model: [EMB ERJ 170-100SU](https://openairdocs.org/model/embraer-erj-170-100su) (OpenAirDocs)
- Aircraft serial: 17000148
- Aircraft time: 37,316 hours, 24,897 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: A/C Pack
- Condition: Odor
- Location: Nr 1
- Stage of operation: DE
- How discovered: O
- Nature of condition: B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SIMA20241018001

## Discrepancy

ELECTRICAL BURNING SMELL FOR 10-15 MINUTES BEFORE AND AFTER PACK 1 FAILED 2X DURING DESCENT. EVENTUALLY WENT AWAY. NO ALERTS/ MESSAGES. REF AML 110400019/1 PACK 1 PLACED ON DEFERRAL MEL 21-44 AUTH# 100906D-C FOLLOWED FIM TASK 21-20-00-810-801-A. FOUND SOURCE OF ODOR TO BE FAILURE OF AIR CYCLE MACHINE PACK 1. AFTER CUTTING OUT PACK 1 AND USING ONLY PACK 2 BURING SMELL WENT AWAY. RAN PACK 2 ONLY FOR 30 MIN. NO FURTHER DEFECTS NOTED. AC OK FOR SERVICE

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