# SDR SIMA20260411001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 11, 2026
- Submitted: April 13, 2026
- Operation: Air carrier
- Aircraft: [N794JH](https://openairdocs.org/aircraft/N794JH), 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: 17000066
- Aircraft time: 53,829 hours, 35,240 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Unknown
- Condition: Odor
- Location: Cabin
- Stage of operation: CL
- How discovered: O
- Nature of condition: B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SIMA20260411001

## Discrepancy

DURING TAKEOFF, THE AIRCRAFT PUTS OUT A BAD ODOR INTO JUST THE COCKPIT. THE FLIGHT ATTENDANT IN THE BACK SAYS THERE'S NO SMELL TO THEM. IT STARTS GIVING THE SMELL AGAIN DURING THE DESCENT AROUND 18000 FEET BUT NOT NEAR AS SEVERE DURING THE TAKEOFF. DURING TAKEOFF IT TAKES ABOUT 10 MINUTES FOR THE SMELL TO FULLY DISSIPATE OUT OF THE COCKTAIL. THE SMELL IS BAD ENOUGH THAT YOU NEARLY NEED TO PUT ON THE OXYGEN MASK.  ACCOMPLISHED DUAL HEAT EXCHANGER CLEANING IAW EJ-2100-006. NO FURTHER DAMAGES NOTED. MEL RESTORED.

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