# N557SM — ROBINSON HELICOPTER COMPANY R44 II
> **2007** Rotorcraft · Reciprocating · Owner: ACMEFLIGHT LLC · SANTA ROSA, CA
## Aircraft
- **N-Number:** N557SM
- **Serial Number:** 11700
- **Manufacturer:** ROBINSON HELICOPTER COMPANY
- **Model:** R44 II
- **Year manufactured:** 2007
- **Type:** Rotorcraft
- **Engine type:** Reciprocating (01 engines)
- **Seats:** 004
- **Weight class:** CLASS 1
- **Mode S code (hex):** `A71B08`
## Owner
- **Name:** ACMEFLIGHT LLC
- **Type of registrant:** LLC
- **Location:** SANTA ROSA, CA 954043913, US
## Registration
- **Status:** Valid
- **Certificate issued:** 2025-07-09
- **Last action:** 2025-07-09
- **Expiration:** 2032-07-31
## Source
- [FAA Aircraft Inquiry](https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=557SM)
- [ADS-B Exchange live tracking](https://globe.adsbexchange.com/?icao=a71b08)
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