# SDR HNAA2026022400151

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 21, 2026
- Submitted: February 24, 2026
- Operation: Air carrier
- Aircraft: [N939AE](https://openairdocs.org/aircraft/N939AE), registered now
- Make and model: Emb EMB-145LR
- Registry model: [EMB EMB-145LR](https://openairdocs.org/model/embraer-emb-145lr) (OpenAirDocs)
- Aircraft serial: 14500923
- System (JASC): [2700 · Flight Control System](https://openairdocs.org/jasc/2700)
- Part: Control Unit
- Part number: 3621001017
- Part serial: 1352
- Condition: Faulted
- Location: Zone 200
- Part time: 51 hours, 54 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HNAA2026022400151

## Discrepancy

PTRIM BACK UP INOP IN FLIGHT AND RTF.   T/S SYST3M WIRES AND CONNECTORS IAW FIM 27-43-00-810-802-A OPS CHECK GOOD COULD NOT DULICATE EICAS OR CMC MESSAGE DURING T/SPER MOC POITIVE MAINT R/R HSCU IAW AMM 27-40-01 OPS CHECK IAW AMM 27-40-00-700-802A OPS CHECK GOOD

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