# N729YX: 2015 Embraer S A ERJ 170-200 LR

- Status: Valid registration
- Airframe: [Embraer S A ERJ 170-200 LR](https://openairdocs.org/model/embraer-s-a-erj-170-200-lr) (registry code 3260415, 88 seats)
- Engine: [GE CF34-8E5](https://openairdocs.org/engine/ge-cf34-8e5) (registry code 30061)
- Data sheets: [TCDS A56NM](https://openairdocs.org/tcds/A56NM) (Embraer S.A.), [TCDS E00063EN](https://openairdocs.org/tcds/E00063EN) (General Electric Company GE Aerospace) (OpenAirDocs)
- Serial number: 17000512
- Year built: 2015
- Type: Fixed wing multi engine
- Engine type: Turbo-fan
- Airworthiness: Standard, transport
- Airworthiness date: November 9, 2015
- Certificate issued: November 6, 2015
- Expires: November 30, 2028
- Mode S code: A9C737
- Registered owner: [Republic Airways Inc](https://openairdocs.org/faa-owner/REPUBLIC%20AIRWAYS%20INC)
- Location: [Carmel, IN](https://openairdocs.org/faa-place/IN/Carmel)
- Owner type: Corporation
- Owner's area on the map: 39.9666° N, 86.1751° W: Placed by OpenAirDocs at the center of ZIP code 46032, within about 3 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=729YX
- Page: https://openairdocs.org/aircraft/N729YX

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): 66 in force

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

- [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
- [AD 2017-21-09](https://openairdocs.org/ad/2017-21-09): Fuselage · Embraer ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 10 more. Effective Nov 27, 2017
- [AD 2017-09-09](https://openairdocs.org/ad/2017-09-09): Passenger Compartment Equipment · Boeing 717-200, MD-90-30, CL-600-2C10 (Regional Jet Series 700) and 17 more. Effective Jun 28, 2017
- [AD 2016-12-14](https://openairdocs.org/ad/2016-12-14): Pneumatic · Embraer ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 10 more. Effective Jul 27, 2016
- [AD 2014-16-05](https://openairdocs.org/ad/2014-16-05): Pneumatic · Embraer ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 4 more. Effective Oct 2, 2014
- [AD 2013-25-04](https://openairdocs.org/ad/2013-25-04): Equipment/Furnishings · Embraer ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 11 more. Effective Feb 10, 2014
- [AD 2013-16-22](https://openairdocs.org/ad/2013-16-22): Fuselage · Embraer ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 11 more. Effective Sep 27, 2013
- [AD 2013-11-17](https://openairdocs.org/ad/2013-11-17): Pneumatic · Embraer ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 11 more. Effective Aug 6, 2013
- [AD 2013-05-12](https://openairdocs.org/ad/2013-05-12): Fire Protection · Embraer ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 11 more. Effective May 3, 2013
- [AD 2013-03-13](https://openairdocs.org/ad/2013-03-13): Doors · Embraer ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 11 more. Effective Mar 19, 2013
- [AD 2012-16-09](https://openairdocs.org/ad/2012-16-09): Air Conditioning · Embraer ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 11 more. Effective Sep 21, 2012
- [AD 2011-18-04](https://openairdocs.org/ad/2011-18-04): Equipment/furnishings · Embraer - Empresa Brasileira de Aeronautica ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 11 more. Effective Oct 14, 2011
- [AD 2011-10-03](https://openairdocs.org/ad/2011-10-03): Fuselage · Embraer - Empresa Brasileira de Aeronautica ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 10 more. Effective Jun 15, 2011
- [AD 2011-08-08](https://openairdocs.org/ad/2011-08-08): Electrical power · Embraer - Empresa Brasileira de Aeronautica ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 11 more. Effective May 18, 2011
- [AD 2011-01-09](https://openairdocs.org/ad/2011-01-09): Oxygen · Airbus A300 B2-1A, A300 B2-1C, A300 B2-203 and 290 more. Effective Feb 9, 2011
- [AD 2010-18-04](https://openairdocs.org/ad/2010-18-04): Fuselage · Embraer - Empresa Brasileira de Aeronautica ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 10 more. Effective Sep 29, 2010
- [AD 2010-10-07](https://openairdocs.org/ad/2010-10-07): Wings · Embraer - Empresa Brasileira de Aeronautica ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 11 more. Effective Jun 17, 2010
- [AD 2010-08-06](https://openairdocs.org/ad/2010-08-06): Wings · Embraer - Empresa Brasileira de Aeronautica ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 10 more. Effective May 19, 2010
- [AD 2010-08-02](https://openairdocs.org/ad/2010-08-02): Hydraulic power · Embraer - Empresa Brasileira de Aeronautica ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 11 more. Effective May 19, 2010
- [AD 2010-09-04](https://openairdocs.org/ad/2010-09-04): Navigation · Embraer - Empresa Brasileira de Aeronautica ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 13 more. Effective May 14, 2010
- [AD 2010-01-12](https://openairdocs.org/ad/2010-01-12): Electrical power and Instruments · Embraer ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 4 more. Effective Feb 18, 2010
- [AD 2009-26-15](https://openairdocs.org/ad/2009-26-15): Nacelles/Pylons · Embraer - Empresa Brasileira de Aeronautica ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 10 more. Effective Feb 4, 2010
- [AD 2009-23-08](https://openairdocs.org/ad/2009-23-08): Doors · Embraer - Empresa Brasileira de Aeronautica ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 10 more. Effective Dec 17, 2009
- [AD 2009-06-16](https://openairdocs.org/ad/2009-06-16): RAT (Ram air turbine) · Embraer - Empresa Brasileira de Aeronautica ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 11 more. Effective Apr 30, 2009
- [AD 2008-23-17](https://openairdocs.org/ad/2008-23-17): Tie Down Straps · Embraer - Empresa Brasileira de Aeronautica ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 11 more. Effective Dec 30, 2008
- [AD 2008-20-02](https://openairdocs.org/ad/2008-20-02): Hydraulic system tube clamps · Embraer - Empresa Brasileira de Aeronautica ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 10 more. Effective Nov 3, 2008
- [AD 2008-18-01](https://openairdocs.org/ad/2008-18-01): Pressure equalization valve · Embraer - Empresa Brasileira de Aeronautica ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 11 more. Effective Oct 14, 2008
- [AD 2008-17-11](https://openairdocs.org/ad/2008-17-11): Flight Guidance Control System (FGCS) · Embraer - Empresa Brasileira de Aeronautica ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 10 more. Effective Oct 2, 2008
- [AD 2008-08-21](https://openairdocs.org/ad/2008-08-21): Forward thrust range · Embraer - Empresa Brasileira de Aeronautica ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 10 more. Effective May 27, 2008
- [AD 2008-02-02](https://openairdocs.org/ad/2008-02-02): Inertial Reference Units (IRU) · Embraer - Empresa Brasileira de Aeronautica ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 10 more. Effective Feb 20, 2008
- [AD 2007-13-13](https://openairdocs.org/ad/2007-13-13): Drier metering unit (DMU) inlet · Embraer ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 4 more. Effective Aug 3, 2007
- [AD 2007-12-18](https://openairdocs.org/ad/2007-12-18): Left and right wing stub tanks · Embraer ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 4 more. Effective Jul 19, 2007
- [AD 2007-07-10](https://openairdocs.org/ad/2007-07-10): Lavatory waste compartment doors · Embraer ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 4 more. Effective May 8, 2007
- [AD 2007-05-02](https://openairdocs.org/ad/2007-05-02): Air data smart probes (ADSPs) · Embraer - Empresa Brasileira de Aeronautica ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 7 more. Effective Apr 5, 2007
- [AD 2007-04-20](https://openairdocs.org/ad/2007-04-20): Ram air turbine (RAT) · Embraer - Empresa Brasileira de Aeronautica ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 7 more. Effective Apr 3, 2007
- [AD 2006-26-11](https://openairdocs.org/ad/2006-26-11): Smoke seals · Embraer - Empresa Brasileira de Aeronautica ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 7 more. Effective Feb 8, 2007
- [AD 2006-20-14](https://openairdocs.org/ad/2006-20-14): Flight deck door electronic equipment · Embraer - Empresa Brasileira de Aeronautica ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 7 more. Effective Jan 16, 2007

### Matched by engine (GE CF34-8E5)

- [AD 2026-21-11](https://openairdocs.org/ad/2026-21-11): Turbine Engine Compressor Section · General Electric Company GE Aerospace CF34-8C1, CF34-8C5, CF34-8C5A1 and 10 more. Effective Nov 27, 2026
- [AD 2025-12-08](https://openairdocs.org/ad/2025-12-08): Turbine Engine Combustion Section · General Electric CF34-8C1, CF34-8C5, CF34-8C5A1 and 10 more. Effective Jul 23, 2025
- [AD 2023-02-05](https://openairdocs.org/ad/2023-02-05): Turbine Engine Combustion Section · General Electric CF34-8C1, CF34-8C5, CF34-8C5A1 and 9 more. Effective Mar 14, 2023
- [AD 2022-21-06](https://openairdocs.org/ad/2022-21-06): Turbine Section · General Electric CF34-8C1, CF34-8C5, CF34-8C5A1 and 10 more. Effective Nov 15, 2022
- [AD 2022-09-14](https://openairdocs.org/ad/2022-09-14): Compressor Bleed Valve · General Electric CF34-8C1, CF34-8C5, CF34-8C5A1 and 10 more. Effective Jun 24, 2022
- [AD 2022-08-06](https://openairdocs.org/ad/2022-08-06): Turbine Engine Compression Section · General Electric CF34-8C1, CF34-8C5, CF34-8C5A1 and 10 more. Effective Apr 29, 2022
- [AD 2021-26-19](https://openairdocs.org/ad/2021-26-19): Turbine Section · General Electric CF34-8C5, CF34-8C5B1, CF34-8E2 and 6 more. Effective Jan 25, 2022
- [AD 2021-23-51](https://openairdocs.org/ad/2021-23-51): Turbine Engine Compression Section · General Electric CF34-8C1, CF34-8C5, CF34-8C5A1 and 10 more. Effective Dec 29, 2021
- [AD 2021-18-13](https://openairdocs.org/ad/2021-18-13): Turbine Engine Combustion Section · General Electric CF34-8C1, CF34-8C5, CF34-8C5A1 and 10 more. Effective Oct 22, 2021
- [AD 2018-17-14](https://openairdocs.org/ad/2018-17-14): Thrust Reverser · General Electric CF34-8E2, CF34-8E2A1, CF34-8E5 and 4 more. Effective Nov 7, 2018
- [AD 2017-20-09](https://openairdocs.org/ad/2017-20-09): Turbine Engine Bypass Section · General Electric CF34-8E2, CF34-8E2A1, CF34-8E5 and 4 more. Effective Nov 13, 2017
- [AD 2017-17-18](https://openairdocs.org/ad/2017-17-18): Turbine Engine Compressor Section · General Electric CF34-8C1, CF34-8C5, CF34-8C5A1 and 10 more. Effective Oct 6, 2017
- [AD 2013-06-06](https://openairdocs.org/ad/2013-06-06): Operability bleed valves (OBV) · General Electric CF34-8C1, CF34-8C5, CF34-8C5A1 and 10 more. Effective May 8, 2013
- [AD 2009-24-06](https://openairdocs.org/ad/2009-24-06): Full authority digital electronic controls · General Electric CF34-8E2, CF34-8E2A1, CF34-8E5 and 4 more. Effective Dec 28, 2009
- [AD 2008-05-01](https://openairdocs.org/ad/2008-05-01): Fuel metering units (FMU) · General Electric CF34-10E2A1, CF34-10E5, CF34-10E5A1 and 8 more. Effective Apr 3, 2008
- [AD 2005-07-09](https://openairdocs.org/ad/2005-07-09): Master variable geometry (VG) actuators · General Electric CF34-8E2, CF34-8E2A1, CF34-8E5 and 4 more. Effective Apr 20, 2005

### 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 2022-08-07](https://openairdocs.org/ad/2022-08-07) (historical): Windows · Embraer ERJ 170-100 STD, ERJ 170-100 SU, ERJ 170-100 SE and 11 more. Effective Apr 26, 2022
- [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
- [AD 2017-06-08](https://openairdocs.org/ad/2017-06-08) (historical): Flight controls; Fuel; Doors; Fuselage; Nacelles/pylons; Stabilizers; Wings; Powerplant; and Exhaust. · Embraer ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 4 more. Effective May 11, 2017
- [AD 2012-07-08](https://openairdocs.org/ad/2012-07-08) (historical): Fuselage & Wings · Embraer - Empresa Brasileira de Aeronautica ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 4 more. Effective May 29, 2012
- [AD 2012-05-08](https://openairdocs.org/ad/2012-05-08) (historical): Wings · Embraer - Empresa Brasileira de Aeronautica ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 4 more. Effective Apr 4, 2012
- [AD 2010-18-01](https://openairdocs.org/ad/2010-18-01) (historical): Airborne auxiliary power · Embraer - Empresa Brasileira de Aeronautica ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 11 more. Effective Sep 9, 2010
- [AD 2010-14-14](https://openairdocs.org/ad/2010-14-14) (historical): Pneumatic · Embraer - Empresa Brasileira de Aeronautica ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 11 more. Effective Aug 26, 2010
- [AD 2010-11-13](https://openairdocs.org/ad/2010-11-13) (historical): Wings · Embraer ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 4 more. Effective Jul 6, 2010
- [AD 2010-07-04](https://openairdocs.org/ad/2010-07-04) (historical): Fire protection · Embraer - Empresa Brasileira de Aeronautica ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 11 more. Effective Apr 9, 2010
- [AD 2007-16-09](https://openairdocs.org/ad/2007-16-09) (historical): Low-stage check valve · Embraer - Empresa Brasileira de Aeronautica ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 7 more. Effective Sep 13, 2007
- [AD 2007-06-53](https://openairdocs.org/ad/2007-06-53) (historical): Aft cargo door · Embraer - Empresa Brasileira de Aeronautica ERJ 170-100 LR, ERJ 170-100 SE, ERJ 170-100 STD and 7 more. Effective May 7, 2007
- [AD 2008-16-01](https://openairdocs.org/ad/2008-16-01) (historical): Full authority digital engine controls (FADECs) · General Electric CF34-8E2, CF34-8E2A1, CF34-8E5 and 4 more. Effective Aug 15, 2008
- [AD 2004-04-04](https://openairdocs.org/ad/2004-04-04) (historical): Master Variable geometry (VG) actuators · General Electric CF34-8E2, CF34-8E2A1, CF34-8E5 and 4 more. Effective Mar 9, 2004

## 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 N729YX.

## FAA accident and incident reports

None matched to N729YX.

## Service difficulty reports (43)

As reported by operators and repair stations. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

- [SDR R61A2025072600323](https://openairdocs.org/sdr/R61A2025072600323), Jul 26, 2025: ATTACH FITTING. CORRODED. DURING HEAVY CHECK FOUND FWD FUSELAGE LAV FLOOR ATTACHMENT FITTING AT FR 16 LBL 44 FOUND CORRODED. REPLACED SUPPORT IAW SRM 51-43-04
- [SDR R61A2025072600322](https://openairdocs.org/sdr/R61A2025072600322), Jul 26, 2025: FLOOR SUPPORT. CORRODED. DURING HEAVY CHECK FOUND CFIII INTERNAL FLOOR PANEL STRUCTURE CORRODED FLOOR PANEL SUPPORT AT FR84 AND RBL38. PANEL WAS REPLACED IAW SRM 51-41-02
- [SDR R61A2025072600321](https://openairdocs.org/sdr/R61A2025072600321), Jul 26, 2025: SUPPORT BRACKET. CORRODED. DURING HEAVY CHECK FOUND CFIII INTERNAL FLOOR PANEL SUPPORT BRACKET CORRODED AT FR87 AND LBL28. PANEL WAS REPLACED IAW SRM 51-41-01
- [SDR R61A2025072600320](https://openairdocs.org/sdr/R61A2025072600320), Jul 26, 2025: SPLICE. CORRODED. DURING HEAVY CHECK FOUND CFIII INTERNAL FLOOR STRUCTURE CORROSION FOUND ON LH O/B SPLICE PLATE FR 87-88. SPLICE WAS REPLACED IAW SRM 51-42-02
- [SDR R61A2025072600319](https://openairdocs.org/sdr/R61A2025072600319), Jul 26, 2025: SPLICE. CORRODED. DURING HEAVY CHECK FOUND WET AREA RH O/B FLOOR SPLICE CORRODED FR 87-88. SPLICE WAS REPLACED IAW SRM 51-42-02
- [SDR R61A2025072600318](https://openairdocs.org/sdr/R61A2025072600318), Jul 26, 2025: SHEAR PANEL. CORRODED. DURING HEAVY CHECK FOUND CFIII INTERNAL FLOOR STRUCTURE CORROSION FOUND ON MID SHEAR PANEL FR 87-88. PANEL WAS REPLACED IAW SRM 51-42-01
- [SDR R61A2025072600317](https://openairdocs.org/sdr/R61A2025072600317), Jul 26, 2025: SHEAR PANEL. CORRODED. DURING HEAVY CHECK FOUND CFIII INTERNAL FLOOR STRUCTURE CORROSION FOUND ON LH SHEAR PANEL AT FR 87-88. PANEL WAS REPLACED IAW SRM 51-42-01
- [SDR R61A2025041600196](https://openairdocs.org/sdr/R61A2025041600196), Apr 16, 2025: REGULATOR VALVE. FAILED. ON DEPARTURE GOT BLEED 1 AND 2 OVERPRESSURE ON EICAS. AIRCRAFT DID NOT PRESSURIZE. DECLARED EMERGENCY, LANDED WITHOUT INCIDENT. R&R E2 NACELLE PRESSURE REGULATI
- [SDR R61A2023080100408](https://openairdocs.org/sdr/R61A2023080100408), Jul 14, 2023: SEAT TRACK. CORRODED. FWD FUSE FLOOR STRUCTURE CORROSION FOUND ON RH INBD SEAT TRACK BTWN FR 17-18.REPLACED SEAT TRACK PN 170-03263-001 IAW SRM 51-41-01, 51-41-02, 51-43-03,51-43-04.
- [SDR R61A2023080100401](https://openairdocs.org/sdr/R61A2023080100401), Jul 14, 2023: CROSSBEAM. CORRODED. CORROSION FOUND ON CF3 CROSSBEAM FR84 LBL32-36. REPAIRED CROSSBEAM / SHEAR CLIP PN 170-66797-001 IAW ETD2023-170-017743.
- [SDR R61A2023080100402](https://openairdocs.org/sdr/R61A2023080100402), Jul 11, 2023: ACCESS DOOR. CORRODED. CORRODED WASTE ACCESS DOOR @CF3 FR 86-89 STR 26R-28R. REPLACED WASTE PANEL PN 170-86668-403 IAW SRM 51-21-01, 53-03-60.
- [SDR R61A2022082500518](https://openairdocs.org/sdr/R61A2022082500518), Aug 22, 2022: SKIN. DENTED. ADDITIONAL DENT AND SCRATCH DAMAGE OBSERVED TO PREVIOUS LIGHTNING DAMAGE REPAIR BETWEEN FR 16-17 AND ST20L-21L.REPAIRED AREA IAW ETD 2022-170-026653 REV B MAJOR
- [SDR R61A2023080100404](https://openairdocs.org/sdr/R61A2023080100404), Jul 14, 2022: SEAT TRACK. CORRODED. FWD FUSELAGE FLOOR STRUCTURE CORROSION FOUND ON LH INBD SEAT TRACK BTWN FR18-20. REPLACED SEAT TRACK PN 170-03264-001 IAW SRM 51-41-01, 51-44-02, 51-43-03, 51-4
- [SDR R61A2023080100403](https://openairdocs.org/sdr/R61A2023080100403), Jul 14, 2022: SUPPORT. CORRODED. FWD FUSE. FLOOR STRUCTURE CORROSION FOUND ON BRACKET SUPPORT AT CROSS BEAM 16 ON LHS. REPLACED SUPPORT PN 170-13633-001 IAW SRM 51-41-02, 51-43-03
- [SDR R61A2023080100407](https://openairdocs.org/sdr/R61A2023080100407), Jul 11, 2022: SPAR. UNKNOWN. MAJOR****RH-OB-MAIN WING SPAR 1 INSPECTION AND REWORK SB57-73G1P2. PERFORMED JC# 170EO-57-20-0050MA_1****MAJOR
- [SDR R61A2023080100406](https://openairdocs.org/sdr/R61A2023080100406), Jul 11, 2022: SPAR. UNKNOWN. MAJOR****LH-OB-MAIN WING SPAR 1 INSPECTION AND REWORK SB57-73G1P1. PERFORMED JC# 170EO-57-20-0049MA_1****MAJOR
- [SDR R61A2023080100405](https://openairdocs.org/sdr/R61A2023080100405), Jul 11, 2022: SKIN. CRACKED. MAJOR** CRACK FOUND ALONG FASTNER HEAD ON RH LWR WING PNL BTWN RIB 22-23 -2.50" FROM FRONT SPAR. REPAIRED IAR ETD2023-170- 017360****MAJOR
- [SDR R61A2021041400331](https://openairdocs.org/sdr/R61A2021041400331), Apr 1, 2021: SUPPORT. CORRODED. LH PANEL SUPPORT BETWEEN FR 88-90 HAS CORROSION. LH PANEL SUPPORT REPLACED AT FR 88-90 IAW ERJ 175 SRM 51-42-01, 51-43-03, AND 51-21-01.
- [SDR R61A2021041400333](https://openairdocs.org/sdr/R61A2021041400333), Mar 31, 2021: GUSSET. CORRODED. CORROSION FOUND ON CENTER FUSELAGE III FLOOR SUPPORT STRUCTURE IB GUSSET PLATE AT FRAME 90, RHS. CENTER FUSELAGE III FLOOR SUPPORT STRUCTURE IB GUSSET PLATE AT 
- [SDR R61A2021041400332](https://openairdocs.org/sdr/R61A2021041400332), Mar 31, 2021: DOUBLER. CORRODED. CF III, CORROSION FOUND ON DOUBLER LH SIDE BTWN FR 85-86. CF III, CORRODED DOUBLER ON LH SIDE BTWN FR 85-86 REPLACED IAW SRM 51-41-01 AND SRM 51-43-01.
- [SDR R61A2021041300330](https://openairdocs.org/sdr/R61A2021041300330), Mar 31, 2021: SHEAR PANEL. CORRODED. CORROSION FOUND ON CENTER FUSELAGE III FLOOR SUPPORT SHEAR PANEL AT FR 88 AND LBL 9. FUSELAGE III FLOOR SUPPORT SHEAR PANEL REPLACED AT FR 88 AND LBL 9 IAW ERJ 
- [SDR R61A2021041300329](https://openairdocs.org/sdr/R61A2021041300329), Mar 31, 2021: SHEAR PANEL. CORRODED. CORROSION FOUND ON CENTER FUSELAGE III FLOOR SUPPORT MID SHEAR PANEL AT FR 88. CENTER FUSELAGE III FLOOR SUPPORT MID SHEAR PANEL AT FR 88 REPLACED WITH A NEW SH
- [SDR R61A2021041300328](https://openairdocs.org/sdr/R61A2021041300328), Mar 31, 2021: SUPPORT. CORRODED. RH PANEL SUPPORT BETWEEN FR 88-90 HAS CORROSION. RH PANEL SUPPORT BETWEEN FR 88-90 REPLACED WITH NEW PART IAW EMBRAER 175 SRM 51-42-07 & SRM 51-43-03.
- [SDR R61A2021041300327](https://openairdocs.org/sdr/R61A2021041300327), Mar 31, 2021: GUSSET. CORRODED. CORROSION FOUND ON CENTER FUSELAGE III FLOOR SUPPORT STRUCTURE GUSSET PLATE AT FRAME 90 RHS. CENTER FUSELAGE III FLOOR SUPPORT STRUCTURE GUSSET PLATE AT FRAME 9
- [SDR R61A2021010800009](https://openairdocs.org/sdr/R61A2021010800009), Jan 6, 2021: WARNING MESSAGE. FALSE ACTIVATION. LG WOW SYSTEM FAIL MESSAGE, EXTINGUISHED DURING DESCENT. DECLARED EMERGENCY, LANDED WITHOUT INCIDENT. COMPLIED WITH FIM 32-60-00-810-892-A, TRANSITORY CONDITION
- [SDR R61A2020111300757](https://openairdocs.org/sdr/R61A2020111300757), Nov 11, 2020: POWER SUPPLY. INOPERATIVE. EMERGENCY LIGHT BATTERY FAULT. R & R EMERGENCY LIGHT POWER UNIT 4.
- [SDR R61A2020120800855](https://openairdocs.org/sdr/R61A2020120800855), Nov 1, 2020: PRESSURE SWITCH. FAILED. PARKING BRAKE NOT RELEASED EICAS IN FLIGHT WITH LIGHT ON UNTIL LANDING. DECLARED EMERGENCY, LANDED WITHOUT INCIDENT. R & R NR 2 EMERGENCY PARKING BRAKE PRESSURE
- [SDR R61A202003170418](https://openairdocs.org/sdr/R61A202003170418), Mar 12, 2020: SPAR. CRACKED. ***AIRCRAFT IS IN HEAVY CHECK*** L/H WINGLET FRONT SPAR CRACKED. REPLACED WINGLET IAW AMM 57-30-00-400-801-A AND T/C 170-57-30-0001_1. ***AIRCRAFT REMAINS IN HE
- [SDR R61A202003170417](https://openairdocs.org/sdr/R61A202003170417), Mar 12, 2020: SPAR. CRACKED. ***AIRCRAFT IS IN HEAVY CHECK*** R/H WINGLET FRONT SPAR CRACKED. REPLACED WINGLET IAW AMM 57-30-00-400-801-A AND T/C 170EO-57-30-0001_1. ***AIRCRAFT REMAINS IN 
- [SDR R61A202003160416](https://openairdocs.org/sdr/R61A202003160416), Mar 12, 2020: FITTING. CRACKED. ** WHILE AIRCRAFT WAS OUT OF SERVICE FOR HEAVY CHECK** LH WING FRONT SPAR TIP FITTING CRACKED. REPLACED SPAR TIP FITTING IAW SRM 51-43-03. ** AIRCRAFT REMAINS O
- [SDR R61A202003160415](https://openairdocs.org/sdr/R61A202003160415), Mar 12, 2020: FITTING. CRACKED. ** WHILE AIRCRAFT WAS OUT OF SERVICE FOR HEAVY CHECK** RH WING FRONT SPAR TIP FITTING CRACKED. REPLACED SPAR TIP FITTING IAW SRM 51-43-03. ** AIRCRAFT REMAINS O
- [SDR R61A2020030650364](https://openairdocs.org/sdr/R61A2020030650364), Mar 5, 2020: POWER UNIT. INOPERATIVE. OVERHEAD EMERGENCY LIGHT C LOSE TO AFT GALLEY NOT WORKING. R&R EMERGENCY LIGHT POWER UNIT IAW AMM 33-50-01.
- [SDR R61A201909180968](https://openairdocs.org/sdr/R61A201909180968), Sep 18, 2019: POWER UNIT. INOPERATIVE. L1 DOOR CEILING PANEL EMERGENCY LIGHTS INOP DURING TEST. R&R ELPU ABOVE L1 DOOR IAW AMM 33-50-01, OPS CHECK GOOD.
- [SDR R61A201906118600](https://openairdocs.org/sdr/R61A201906118600), Jun 8, 2019: LIGHT. INOPERATIVE. PHOTOLUMINESCENT LIGHT STRIP NEAR SEATS 7AB CRACKED. R&R PHOTOLUMINESCENT LIGHT STRIP NEAR SEATS 7AB IAW AMM 33-50-21.
- [SDR R61A2019020840166](https://openairdocs.org/sdr/R61A2019020840166), Feb 4, 2019: PLATE. LOOSE. METAL SHIELD PLATE ON L2 DOOR IS LOOSE AND INHIBITS DOOR OPENING AND CLOSING. RE-SECURED L2 DOOR LINING IAW AMM 25-23-05. OPS CHECK DOOR LOCKING MECHANISM IAW 5
- [SDR R61A201712110947](https://openairdocs.org/sdr/R61A201712110947), Dec 11, 2017: INDICATOR. DETACHED. SLIDE DISARMED INDICATOR FALLING DOWN IN WINDOW ON L1 DOOR. SECURED SLIDE ARM/DISARM MECHANISM IAW AMM 52-11-00. OPS CHECK GOOD.
- [SDR R61A201610310632](https://openairdocs.org/sdr/R61A201610310632), Oct 31, 2016: FLASHLIGHT. INTERMITTENT. MAINTENANCE REPORTED THAT THE REAR FLIGHT ATTENDANT FLASHLIGHT WORKS INTERMITTENTLY. MAINTENANCE REMOVED AND REPLACED THE FLASHLIGHT IAW AMM AND OPS CHECKED GOO
- [SDR R61A201512180942](https://openairdocs.org/sdr/R61A201512180942), Dec 18, 2015: WARNING MESSAGE. ACTIVATED. CREW RECEIVED AN AFT PASSENGER DOOR OPEN MESSAGE. PRESSURIZATION AND DOOR INDICATIONS AT THE DOOR WERE NORMAL. AN EMERGENCY WAS NOT DECLARED AN CREW LANDED WITH
- [SDR R61A201512170941](https://openairdocs.org/sdr/R61A201512170941), Dec 17, 2015: FITTING. OUT OF ADJUST. CREW REPORTED THAT THE L2 DOOR SHOWED OPEN ON EICAS, ALL INDICATIONS ON DOOR WERE NORMAL. F/A ALSO REPORTED THAT THE DOOR WAS HARD TO ARM SLIDE. MAINTENANCE ADJ
- [SDR R61A201512130923](https://openairdocs.org/sdr/R61A201512130923), Dec 13, 2015: INDICATION SYS. OUT OF ADJUST. CREW REPORTED THAT THE L2 DOOR LATCH INDICATION WAS INOPERATIVE. MAINTENANCE ADJUSTED DOOR CLOSED INDICATION FLAG IAW AMM AND OPS CHECKED GOOD.
- [SDR R61A201512090901](https://openairdocs.org/sdr/R61A201512090901), Dec 9, 2015: DOOR. OUT OF ADJUST. CREW REPORTED THAT THE L2 DOOR SHOWED OPEN IN FLIGHT. ADJUSTED L2 DOOR EXTERNAL STEP IAW AMM AND OPS CHECKED GOOD.
- [SDR R61A201512080898](https://openairdocs.org/sdr/R61A201512080898), Dec 8, 2015: SHAFT. DAMAGED. CREW REPORTED THAT THE L2 DOOR LATCH INDICATOR WAS NOT SHOWING GREEN. R & R L2 DOOR ROLLER DETECTOR SHAFT IAW AMM AND OPS CHECKED GOOD.
- [SDR R61A201512010884](https://openairdocs.org/sdr/R61A201512010884), Dec 1, 2015: INDICATION SYS. OUT OF ADJUST. CREW REPORTED THAT WHEN THEY WENT TO SHUT THE L2 DOOR ONE OF THE GREEN DOOR LOCK INDICATORS DID NOT SHOW. ADJUSTED DOOR CLOSED INDICATION ASSEMBLY IAW AMM AND O

## STCs that may be installed (OpenAirDocs) (63, first 50)

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 LR)

- [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 ST00885LA](https://openairdocs.org/stc/ST00885LA): Installation of fire extinguisher cartridges as replacements for Pacific Scientific fire extinguisher cartridges in fire extinguisher bottles. AMETEK AMERON, LLC d/b/a MASS Systems
- [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 ST00197IB](https://openairdocs.org/stc/ST00197IB): Installation of the Universal Quick Access Recorder (uQAR). Flight Data Technologies Inc
- [STC ST03427NY](https://openairdocs.org/stc/ST03427NY): Installation of Electronic Flight Bags Provisions. Delta Engineering Corporation
- [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 ST03875NY](https://openairdocs.org/stc/ST03875NY): Installation of interior placards, signs and markings. Libellule Monde Inc
- [STC ST00030IB](https://openairdocs.org/stc/ST00030IB): Installation of Test Tech ELT. APTOZ EHF
- [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 ST01989LA-D](https://openairdocs.org/stc/ST01989LA-D): Adjustable Cargo Net Installations. Safran Cabin Inc
- [STC ST01997LA-D](https://openairdocs.org/stc/ST01997LA-D): Interior Installations and Modifications. Safran Cabin Inc
- [STC ST02000LA-D](https://openairdocs.org/stc/ST02000LA-D): Interior Installations and Modifications. Safran Cabin Inc
- [STC ST02402LA](https://openairdocs.org/stc/ST02402LA): Interior Installations and Modifications. Safran Cabin Inc
- [STC ST02563LA](https://openairdocs.org/stc/ST02563LA): Interior Installations and Modifications. Safran Cabin Inc
- [STC ST02564LA](https://openairdocs.org/stc/ST02564LA): Interior installations and modifications. Safran Cabin Inc
- [STC ST12056IB](https://openairdocs.org/stc/ST12056IB): The Manufacture and Installation of External Printed Aircraft Graphics Film. Libellule Monde 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 ST00079IB](https://openairdocs.org/stc/ST00079IB): Integration of Halon-free Portable Fire Extinguisher HAFEX. UMLAUT ENGINEERING GMBH
- [STC ST04820NY](https://openairdocs.org/stc/ST04820NY): Installation (including Demod option) of Cabin Connectivity. Delta Engineering Corporation
- [STC ST00215IB](https://openairdocs.org/stc/ST00215IB): Installation of saf-Tglo ECO Photoluminescent Aisle Path Marking Systems. STG AEROSPACE GERMANY GmbH
- [STC ST01936WI](https://openairdocs.org/stc/ST01936WI): Installation of LED lights. AeroLED's Holdings LLC
- [STC ST00177IB](https://openairdocs.org/stc/ST00177IB): The modification and installation of New Increased Capacity Overhead Bins. GAL Aviation Inc
- [STC ST04629CH](https://openairdocs.org/stc/ST04629CH): INSTALL USB FLIGHT DECK POWER SYSTEM. ASTRONICS ARMSTRONG AEROSPACE
- [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 ST00098IB](https://openairdocs.org/stc/ST00098IB): Introduction of ADS-B Out. STC Twenty One Limited
- [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 ST04177AT](https://openairdocs.org/stc/ST04177AT): Installation of a Talon Aerospace LED Replacement General Purpose Lamps. Aaxico Technical Services Inc
- [STC ST04116CH](https://openairdocs.org/stc/ST04116CH): Installation of 802.11 ac protocol Cabin Wireless Access Points (acWAP) retrofit for existing Cabin Wireless Access Points. Intelsat Inflight LLC
- [STC ST02532LA](https://openairdocs.org/stc/ST02532LA): Modify the wing fuel tanks access cover installation by replacing the existing rubstrip and seal with a new encapsulated wire mesh gasket and a new seal. Aviation Devices & Electronic Components LLC
- [STC ST04425CH](https://openairdocs.org/stc/ST04425CH): Installation of a Honeywell One Aero Edge Node (1AEN) in accordance with StandardAero Master Data List 1037081, Revision (B), dated June 9, 2020 or later FAA approved revision. StandardAero Business Aviation Services LLC
- [STC ST04424CH](https://openairdocs.org/stc/ST04424CH): TPED Compatibility Test in accordance with StandardAero Master Data List 1037140, Revision (B), dated June 1, 2020 or later FAA approved revision. Standard Aero Business Aviation Services LLC
- [STC ST04049NY](https://openairdocs.org/stc/ST04049NY): Installation of a Hoffman Engineering LLC LED Landing Light to replace the OEM Q4559 Series Incandescent Lamp, used as a Landing/Takeoff Light. Hoffman Engineering LLC
- [STC ST04395NY](https://openairdocs.org/stc/ST04395NY): Change to introduce a modification to Zodiac Standard 'Elite' Double seats. 365 Aerospace Ltd Aerospace Logistics Centre
- [STC ST02700LA](https://openairdocs.org/stc/ST02700LA): Installation of Toilet Assembly. Monogram Systems
- [STC ST04340NY](https://openairdocs.org/stc/ST04340NY): Installation of TCAS 7.1 (ACAS II) upgrade of Prior Existing TCAS 7.0. Scandinavian Avionics Design ApS
- [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 ST04361AT](https://openairdocs.org/stc/ST04361AT): Installation of a ADS-B Out. Chippewa Aerospace Inc
- [STC ST03904AT](https://openairdocs.org/stc/ST03904AT): Installation of an AirCell Airborne Wireless Wi-Fi System. Chippewa Aerospace Inc
- [STC ST04216AT](https://openairdocs.org/stc/ST04216AT): Installation of GoGo ATG-4 System. Chippewa Aerospace Inc
- [STC ST03844NY](https://openairdocs.org/stc/ST03844NY): Installation of SuperSeal UltraLite (SSUL) PHOTOLUMINESCENT AISLE PATH MARKING SYSTEM. STG Aerospace Ltd
- [STC ST03776NY](https://openairdocs.org/stc/ST03776NY): Modification to upgrade existing Rockwell Collins TCAS (Model: TTR-920, TTR-921, and TTR-4000) at VERSION 7.0 to Rockwell Collins TCAS (Model: TTR-921, TTR-4000, and TTR-4100) at VERSION 7.1 (ACAS II). Scandinavian Avionics Design ApS
- [STC ST09859AC](https://openairdocs.org/stc/ST09859AC): Installation of a SkyTender Beverage Trolley. ASIG LLC

All 63: https://openairdocs.org/aircraft/N729YX/stcs.md

## Related

- Other Embraer S A ERJ 170-200 LR aircraft: https://openairdocs.org/model/embraer-s-a-erj-170-200-lr/aircraft.md
- The GE CF34-8E5 engine: https://openairdocs.org/engine/ge-cf34-8e5.md

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