# SDR SIMA20120731001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 30, 2012
- Submitted: July 31, 2012
- Operation: Air carrier
- Aircraft: [N838AE](https://openairdocs.org/aircraft/N838AE), registered now
- Make and model: Emb EMB-135KL
- Registry model: [EMB EMB-135KL](https://openairdocs.org/model/embraer-emb-135kl) (OpenAirDocs)
- Aircraft serial: 145651
- Aircraft time: 24,234 hours, 20,892 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Duct
- Condition: Separated
- Location: Heat Exchanger
- Stage of operation: CL
- 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/SIMA20120731001

## Discrepancy

FLIGHT N2726, THE CREW REPORTED THAT ON TAKEOFF THEY LOST PACK 2 (PACK VALVE CLOSED) WOULD NOT RESET.  DECLARED AN EMERGENCY & RETURNED TO DEPARTURE.  LANDED WITHOUT INCIDENT.  AIRCRAFT REMOVED FROM SERVICE.  INSTALLED DUCT ON NR 2 HEAT EXCHANGER.  NR 2 PACK OPS CHECKED GOOD AMM 21-51-00.  AIRCRAFT RETURNED TO SERVICE.

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