# SDR SIMA202601052002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 2, 2026
- Submitted: January 5, 2026
- Operation: Air carrier
- Aircraft: [N778RH](https://openairdocs.org/aircraft/N778RH), registered now
- Make and model: Emb ERJ 170-100 SE
- Registry model: [EMB ERJ 170-100 SE](https://openairdocs.org/model/embraer-erj-170-100-se) (OpenAirDocs)
- Aircraft serial: 17000054
- Aircraft time: 53,909 hours, 35,278 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Duct
- Condition: Failed
- Location: Zone 100
- Stage of operation: DE
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SIMA202601052002

## Discrepancy

CABIN ALT HIGH WARNING ON EICAS WHILE DESCENDING. CABIN ALT REACHED 11,500 RAN THE ASSOCIATED CHECKLIST, CONTINUED DESCENT NO OTHER EICAS PRESSURE MESSAGE APPEARED. FA 1 REPORTED HISSING SOUND FROM L1 DOOR BEFORE WE ADVISED THE FAS OF THE CABIN HI ALT. EMERGENCY DECLARED PERFORMED CABIN DEPRESSURIZATION PER FIM TASK 21-31-00-810-818-A. DID THE PRESSURIZATION PER THE AMM TASK 21-31-00-720-802-A. FCV FOR PACK 1 AND PACK 2 WAS NOT OPENING. PERFORMED VISUAL INSPECTION OF THE LH AND RH PACK PER AMM 21-51-21. FOUND RH PACK DUCT TEAR. REMOVED AND REPLACED PACK 2 OUTLET DUCT IAW AMM 21-51-21AND PACKS OPERATIONAL CHECK GOOD IAW AMM 27-51-00-710-801.

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