# N635SY: Embraer S A ERJ 170-200 LL

- Status: Valid registration
- Airframe: [Embraer S A ERJ 170-200 LL](https://openairdocs.org/model/embraer-s-a-erj-170-200-ll) (registry code 326041A, 88 seats)
- Data sheets: [TCDS A56NM](https://openairdocs.org/tcds/A56NM) (Embraer S.A.) (OpenAirDocs)
- Serial number: 17001012
- Type: Fixed wing multi engine
- Engine type: Turbo-fan
- Certificate issued: December 15, 2025
- Expires: December 31, 2032
- Mode S code: A851F6
- Registered owner: [Skywest Airlines Inc](https://openairdocs.org/faa-owner/SKYWEST%20AIRLINES%20INC)
- Location: [St George, UT](https://openairdocs.org/faa-place/UT/St%20George)
- Owner type: Corporation
- Owner's area on the map: 37.0461° N, 113.5573° W: Placed by OpenAirDocs at the center of ZIP code 84790, within about 4 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=635SY
- Page: https://openairdocs.org/aircraft/N635SY

From the FAA registry file of October 24, 2026. ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination.

## ADs that may apply (OpenAirDocs): 14 in force

### Matched by airframe (Embraer S A ERJ 170-200 LL)

- [AD 2026-13-02](https://openairdocs.org/ad/2026-13-02): Navigation · Airbus Canada Limited Partnership 18, 49-46, 80-A and 555 more. Effective Jul 1, 2026
- [AD 2025-14-05](https://openairdocs.org/ad/2025-14-05): Nacelles/Pylons · Embraer ERJ 170-100 LR, ERJ 170-100 STD, ERJ 170-100 SE and 12 more. Effective Aug 25, 2025
- [AD 2025-01-05](https://openairdocs.org/ad/2025-01-05): Time Limits/Maintenance Checks · Embraer ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 5 more. Effective Mar 17, 2025
- [AD 2024-14-08](https://openairdocs.org/ad/2024-14-08): Pneumatic System · Embraer ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 5 more. Effective Sep 25, 2024
- [AD 2024-12-08](https://openairdocs.org/ad/2024-12-08): Landing gear · Embraer ERJ 170-100 LR, ERJ 170-100 STD, ERJ 170-100 SE and 5 more. Effective Jul 11, 2024
- [AD 2023-13-02](https://openairdocs.org/ad/2023-13-02): Flight controls · Embraer ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 5 more. Effective Sep 5, 2023
- [AD 2023-10-02](https://openairdocs.org/ad/2023-10-02): Indicating/Recording System, Navigation · Boeing 18, 23, 35 and 1,060 more. Effective May 26, 2023
- [AD 2023-03-19](https://openairdocs.org/ad/2023-03-19): Instruments · Embraer ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 5 more. Effective Apr 7, 2023
- [AD 2022-16-01](https://openairdocs.org/ad/2022-16-01): Windows · Embraer ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 12 more. Effective Aug 15, 2022
- [AD 2022-11-51](https://openairdocs.org/ad/2022-11-51): Wing structure · Embraer ERJ 170-200 STD, ERJ 170-200 LR, ERJ 170-200 SU and 1 more. Effective Jun 21, 2022
- [AD 2020-25-08](https://openairdocs.org/ad/2020-25-08): Flight controls · Yaborã Indústria Aeronáutica ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 12 more. Effective Jan 21, 2021
- [AD 2020-07-21](https://openairdocs.org/ad/2020-07-21): Landing gear · Yaborã Indústria Aeronáutica ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 12 more. Effective May 26, 2020
- [AD 2020-05-22](https://openairdocs.org/ad/2020-05-22): Indicating/recording systems · Yaborã Indústria Aeronáutica ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 5 more. Effective Apr 24, 2020
- [AD 2019-19-03](https://openairdocs.org/ad/2019-19-03): Fuselage · Embraer ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 12 more. Effective Oct 31, 2019

### Historical (superseded or no longer in force)

- [AD 2022-25-07](https://openairdocs.org/ad/2022-25-07) (historical): Time Limits/Maintenance Checks, Flight controls, Fuel, Doors, Fuselage, Nacelles/pylons, Stabilizers, Wings, Powerplant, Exhaust · Embraer ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 5 more. Effective Jan 23, 2023
- [AD 2020-12-12](https://openairdocs.org/ad/2020-12-12) (historical): Nacelles/pylons · Yaborã Indústria Aeronáutica ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 12 more. Effective Aug 13, 2020
- [AD 2019-25-16](https://openairdocs.org/ad/2019-25-16) (historical): Flight controls · Embraer ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 5 more. Effective Feb 10, 2020

## Information bulletins (advisory) (1 in force)

- [SAIB NM-20-12](https://openairdocs.org/saib/NM-20-12): Powerplant System - Operating in Icing Conditions. Issued Jun 18, 2020

## NTSB investigations

None matched to N635SY.

## FAA accident and incident reports

None matched to N635SY.

## Service difficulty reports

None filed for this aircraft. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

## STCs that may be installed (OpenAirDocs) (20)

Approved for this aircraft's airframe or engine model, in force first, then newest. The registry doesn't record which STCs an aircraft has; its records do.

### Approved for the airframe (Embraer S A ERJ 170-200 LL)

- [STC ST04801NY](https://openairdocs.org/stc/ST04801NY): Installation (including Demod option) of Connectivity Antenna. Delta Engineering Corporation
- [STC ST12461IB](https://openairdocs.org/stc/ST12461IB): Installation of Cockpit Voice Recorder with optional RIPS Upgrade. Mid- Canada Mod Center
- [STC ST04748NY](https://openairdocs.org/stc/ST04748NY): Installation of the SpaceX Starlink Aviation System. Space Exploration Technologies Corp. / Starlink Aviation
- [STC ST02722LA](https://openairdocs.org/stc/ST02722LA): Updates the aircraft recording system by replacing the forward Cockpit Voice and Data Recorder (CVDR) with a new SRVIVR25 CVDR with Recorder Independent Power Supply (RIPS). Acron Aviation Inc
- [STC ST04328NY](https://openairdocs.org/stc/ST04328NY): The Manufacture and Installation of Exterior Placards, Labels and Signs is to be performed, installed. Libellule Monde Inc
- [STC ST11372DS](https://openairdocs.org/stc/ST11372DS): De-modification of Air-To-Ground (A TG) antennas and associated cabin equipment i. Altitude Aerospace USA
- [STC ST03885AT](https://openairdocs.org/stc/ST03885AT): Installation of an Avionica, Inc. avCM Cellular Module. Aircraft Systems and Manufacturing Inc
- [STC ST12138CH](https://openairdocs.org/stc/ST12138CH): Installation of Universal Avionics KAPTURE Combined Cockpit Voice and Flight Data Recorders i. GoAeroMx, LLC
- [STC ST02402LA](https://openairdocs.org/stc/ST02402LA): Interior Installations and Modifications. Safran Cabin Inc
- [STC ST02534SE](https://openairdocs.org/stc/ST02534SE): Installation and maintenance of a Crane Aerospace & Electronics Tire Pressure Sensor Assembly. ELDEC Corporation
- [STC ST09900AC](https://openairdocs.org/stc/ST09900AC): installation of an Electronic Flight Bag (EFB) power system. L2 Aviation
- [STC ST02472AT](https://openairdocs.org/stc/ST02472AT): Installation of a mini Quick Access Recorder (QAR) model MKI, MKII, or MKIII. Aircraft Systems and Manufacturing Inc
- [STC ST04820NY](https://openairdocs.org/stc/ST04820NY): Installation (including Demod option) of Cabin Connectivity. Delta Engineering Corporation
- [STC ST01936WI](https://openairdocs.org/stc/ST01936WI): Installation of LED lights. AeroLED's Holdings LLC
- [STC ST04562NY](https://openairdocs.org/stc/ST04562NY): Installation of saf-Tglo® SuperSeal UltraLite-X (SSUL-X) Photoluminescent Floor Proximity Emergency Escape Path Marking Systems. STG AEROSPACE GERMANY GmbH
- [STC ST04535AT](https://openairdocs.org/stc/ST04535AT): Installation of the CES-170 Emergency Light Power Unit (ELPU). Chippewa Aerospace Inc
- [STC ST03422NY](https://openairdocs.org/stc/ST03422NY): Update of Intelsat components. Delta Engineering Corporation
- [STC ST00957DE](https://openairdocs.org/stc/ST00957DE): Installation of MarathonNorco Aerospace Inc Nickel Cadmium battery. MarathonNorco Aerospace Inc
- [STC ST04435AT](https://openairdocs.org/stc/ST04435AT): Installation of Astronics Passenger In-Seat Power in the Embraer ERJ-170-100, ERJ-170-200, ERJ-190-100 and ERJ-190-200 Series Aircraft. Chippewa Aerospace Inc
- [STC ST03406NY](https://openairdocs.org/stc/ST03406NY): Installation of a gogo Cabin Connectivity System. Delta Engineering Corporation

## Related

- Other Embraer S A ERJ 170-200 LL aircraft: https://openairdocs.org/model/embraer-s-a-erj-170-200-ll/aircraft.md

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