# SDR SIMA20260704002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 4, 2026
- Submitted: July 6, 2026
- Operation: Air carrier
- Aircraft: [N780AH](https://openairdocs.org/aircraft/N780AH), registered now
- Make and model: Emb ERJ 170-100SU
- Registry model: [EMB ERJ 170-100SU](https://openairdocs.org/model/embraer-erj-170-100su) (OpenAirDocs)
- Aircraft serial: 17000131
- Aircraft time: 40,258 hours, 30,713 cycles
- System (JASC): [2930 · Hydraulic Indicating System](https://openairdocs.org/jasc/2930)
- Part: Warning Message
- Condition: False Activation
- Location: Hyd Sys
- Stage of operation: CR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SIMA20260704002

## Discrepancy

HYD 2 HI TEMP, FOLLOWED BY HYD 2 OVERHEAT. QRH PROCEDURES WERE COMPLIED WITH. HYD 2 OVERHEAT REMAINED FOR REST OF FLIGHT. DECIDED TO DIVERT. EMERGENCY DECLARED PERFORMED HYD SYS 2 EXTERNAL LEAK CHECK AND CHECKED DIFFERENTIAL PRESSURE INDICATORS OF HYD 2 FILTER MANIFOLD AND CASE DRAIN PER AMM 29-10-00-790-801-A, 29-11-05-200-801-A AND 29-11-07-200-801-A. NO LEAKS NOTED, NO DPS POPPED. OPENED UP ENG 2 COWLINGS PER AMM 78-30-01-910-801-A/-802-A AND CHECKED FOR LEAKS OR DAMAGE AROUND HYD 2 EDP, NO LEAKS OR DISCREPANCIES NOTED. PERFORMED ENG RUNS WITH FLT CREW FOR 30 MIN IN ATTEMPT TO REPLICATE HI TEMP ISSUE, HYD SYS 2 TEMPERATURE CONSISTENLY APPROX 58 C, NO DISCREPANCIES NOTED. SEE EAML 116802074 FOR FURTHER DETAILS AND CORRECTIVE ACTION

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