# SDR SIMA2019122019001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 19, 2019
- Submitted: December 23, 2019
- Operation: Air carrier
- Aircraft: N843AE
- Make and model: Emb EMB-135KL
- Registry model: [EMB EMB-135KL](https://openairdocs.org/model/embraer-emb-135kl) (OpenAirDocs)
- Aircraft serial: 145680
- Aircraft time: 36,225 hours, 32,234 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Duct
- Condition: Unsecure
- Location: Seat9bc
- Stage of operation: NR
- 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/SIMA2019122019001

## Discrepancy

STRANGE ODOR OF DIRTY SOCKS COMING FROM PACKS WHILE RUNNING ON APU BLEED.   SECURED RISER DUCT AT SEAT 9BC IAW AMM 21-20-04 .  REMOVED AND REPLACED THE LT CONDENSER MIXER IAW AMM 21-51-04. OPS CHECKED GOOD. LEAK CHECKED GOOD.  NO FURTHER DEFECTS NOTED.  REMOVED AND REPLACED THE LT HEAT EXCHANGER IAW AMM 21-51-02. OPS AND LEAK CHECKED GOOD.  REINSTALLED LT ACM IAW AMM 21-51-03. OPS AND LEAK CHECKED GOOD. C/W EO EM-2100-048 PART A. OPS AND LEAK CHECKED GOOD.  REMOVED AND REPLACED THE RECIRCULATION MUFFLER DUCT IAW AMM 21-24-02. REMOVED AND REPLACED Y-DUCT ON LT PACK IAW AMM 21-60-01. OPS AND LEAK CHECKED GOOD.  NO FURTHER DEFECTS NOTED.

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