# SDR SIMA20120818005

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 18, 2012
- Submitted: August 21, 2012
- Operation: Air carrier
- Aircraft: [N821AE](https://openairdocs.org/aircraft/N821AE), registered now
- Make and model: Emb EMB-135KL
- Registry model: [EMB EMB-135KL](https://openairdocs.org/model/embraer-emb-135kl) (OpenAirDocs)
- Aircraft serial: 145577
- Aircraft time: 25,266 hours, 22,314 cycles
- System (JASC): [3411 · Pitot/Static System](https://openairdocs.org/jasc/3411)
- Part: Pitot System
- Condition: Contaminated
- Stage of operation: DE
- How discovered: O
- Nature of condition: J
- Precautionary procedure: B, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SIMA20120818005

## Discrepancy

FLIGHT 2726, CREW REPORTED DURING DESCENT OUT OF FL370,  RECEIVED "IAS" COMPARE FLAGS ON BOTH FIRST OFFICERS AND CAPTAINS PFD.  CAPTAIN`S IAS WAS UNRELIABLE, SHORTLY AFTER RECEIVED AN AMBER "ALT" COMPARE FLAGS AS WELL.  SELECTED NR 2 ADC ON CAPTAIN`S REVERSIONARY PANEL, EXITED IMC/ICING CONDITIONS  AND DIVERTED.  AFTER LANDING IN WARMER TEMP DESELECTED ADC REVERSION ALL FLGHT INSTRUMENTS APPEARED NORMAL.  COMPLETED AOM VOL 1 CHECKLIST AND DECLARED AN EMERGENCY AND ELECTED TO DIVERT.  LANDED WITHOUT INCIDENT.  AIRCRAFT REMOVED FROM SERVICE.  REMOVED WATER FROM CAPTAIN`S PITOT SYSTEM PER MM 34-30-00 AND PERFORMED OPS CHECK PER MM 34-15-00.  OPS CHECKED NORMAL.  AIRCRAFT RETURNED TO SERVICE.

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