# SDR SIMA20181223003

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 23, 2018
- Submitted: January 2, 2019
- Operation: Air carrier
- Aircraft: [N658AE](https://openairdocs.org/aircraft/N658AE), registered now
- Make and model: Emb EMB-145LR
- Registry model: [EMB EMB-145LR](https://openairdocs.org/model/embraer-emb-145lr) (OpenAirDocs)
- Aircraft serial: 145760
- Aircraft time: 37,508 hours, 32,697 cycles
- System (JASC): [3010 · Airfoil Anti/De-ice System](https://openairdocs.org/jasc/3010)
- Part: Anti-Ice Valve
- Condition: Faulty
- Location: Rt Wing
- Stage of operation: UK
- How discovered: O
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SIMA20181223003

## Discrepancy

PNEUMATIC A/I TEST FAIL ON GROUND. WING A/I FAIL EICAS MSG ON BOTH 1 & 2 ON MULTIPLE ATTEMPTS. C/A-T/S PER FIM TASK 30-11-00-810-805. RAR WING ANTI ICING ASSYMETRY PRESS TRANS IAW AMM 30-11-13-000-801-A & 30-11-13-400-801-A. OPC GOOD AND FOUND ACCESS PANEL 192AR OK TO CLOSE. END PERFORMED PNEUMATIC A/I TEST IN AIR GOT WG A/ICE FAIL EICAS MSG. FOUND MULTIPLE OCCURANCES OF CMC MESSAGE WING A/ICE ASYMMETRY. PERFORMED FIM TASK 30-11-00-810-805-A BLOCK DIAGRAM 002. FOUND RT WING TO FAIL WING THERMAL ANTI-ICING SYSTEM FUNCTIONAL TEST. RT WING A/I VALVE OUTLET ONLY INDICATED 9.5 PSI. (SHOULD BE 19.5 +/- 1.5). REPLACED RT WING ANTI-ICING VALVE IAW AMM TASKS 30-11-01-000-801-A & 30-11-01-400-801-A. PERFORMED FUNCTIONAL TEST AGAIN AND FOUND VALVE OUTLET PRESSURE TO HAVE INCREASED TO 11.5 PSI BUT STILL BELOW LIMITATIONS. REPLACED RT WING A/I VALVE & PICCOLO TUBE COUPLINGS OF RT WING. OPS CHECK IAW 30-00-00-700-802-A GOOD. NO FURTHER DEFECTS NOTED.

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