# N121HQ: 2007 Embraer-Empresa Brasileira De ERJ 170-200 LR

- Status: Valid registration
- Airframe: [Embraer-Empresa Brasileira De ERJ 170-200 LR](https://openairdocs.org/model/embraer-empresa-brasileira-de-erj-170-200-lr) (registry code 3260121, 80 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: 17000194
- Year built: 2007
- Type: Fixed wing multi engine
- Engine type: Turbo-fan
- Airworthiness: Standard, transport
- Airworthiness date: November 30, 2007
- Certificate issued: November 29, 2007
- Expires: October 31, 2028
- Mode S code: A05827
- 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=121HQ
- Page: https://openairdocs.org/aircraft/N121HQ

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-Empresa Brasileira De 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 N121HQ.

## FAA accident and incident reports

None matched to N121HQ.

## Service difficulty reports (155, newest 50)

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 R61A2026051200125](https://openairdocs.org/sdr/R61A2026051200125), May 12, 2026: BATTERY. NO TEST. EMERGENCY LIGHT BATTERY FAILED FUNCTIONAL CHECK. REMOVED AND REPLACED EMERGENCY LIGHT BATTERY 2.
- [SDR R61A2024082600366](https://openairdocs.org/sdr/R61A2024082600366), Aug 13, 2024: SHEAR ANGLE. CORRODED. AILERON CABLE FAIRLEAD SHEAR CLIP AT FR22 HAS ENLARGED HOLES.REMOVED AND REPLACED 2EA AILERON CABLE FAIRLEAD SHEAR CLIPS PER SRM 51-40-08.
- [SDR R61A2024082600](https://openairdocs.org/sdr/R61A2024082600), Aug 13, 2024: SHEAR ANGLE. CORRODED. AILERON CABLE FAIRLEAD SHEAR CLIP AT FR22 HAS ENLARGED HOLES. REMOVED AND REPLACED 2EA AILERON CABLE FAIRLEAD SHEAR CLIPS PER SRM 51-40-08.
- [SDR R61A2021120400982](https://openairdocs.org/sdr/R61A2021120400982), Dec 4, 2021: SHEAR TIE. CORRODED. CORROSION NOTED AT STRG 28R BETWEEN FRAME 86 AND 87 AFTER REMOVAL OF SHEAR CLIP. REMOVED OF CORROSION AT STRG 28R BETWEEN FRAME 86 AND 87 FOUND TO BE OUT OF GEO
- [SDR R61A2021120400979](https://openairdocs.org/sdr/R61A2021120400979), Dec 4, 2021: SHEAR TIE. CORRODED. CORROSION ON SHEAR CLIP FR 81 BETWEEN STRG 27R / 28R. REMOVED AND REPLACED SHEAR CLIP PN: 170-66885-001 REF EMB SRM 51-40-08, RESTORE FINISH REF EMB SRM 51-23-0
- [SDR R61A2021120400978](https://openairdocs.org/sdr/R61A2021120400978), Dec 4, 2021: BEAM. CORRODED. FR 80-81 STGR 28R HAS CORROSION AROUND LIGHTNING HOLE OB SIDE. REMOVED CORRODED FR 80-81 STGR 28R BEAM. REF: SRM 51-40-08. INSTALLED NEW FR 80-81 STGR 28R BEAM.
- [SDR R61A2021120400975](https://openairdocs.org/sdr/R61A2021120400975), Dec 4, 2021: SHEAR TIE. CORRODED. CORROSION ON SHEAR CLIP FR82 BETWEEN STGR 27R/28R. REMOVED AND REPLACED SHEAR CLIP PER SRM 51-40-08.
- [SDR R61A2021120400977](https://openairdocs.org/sdr/R61A2021120400977), Dec 4, 2021: DOUBLER. CORRODED. CORROSION ON INTERNAL SKIN BETWEEN FRAME 90/91 STRG 29R/28R. REMOVED AND REPLACED INTERNAL DOUBLER REF EMB ETD2021-170-039289 RESTORE FINISH REF EMB SRM 51-23-0
- [SDR R61A2021120400973](https://openairdocs.org/sdr/R61A2021120400973), Dec 4, 2021: DOUBLER. CORRODED. CORROSION ON WASTE BOX DOUBLER AFT OF FR88, O/B OF STR 28R. MAJOR REPAIR. REMOVED, LOCATED, DRILLED, AND ALODINED NEW WASTE BOX DOUBLER. INSTALLED NEW WASTE BOX
- [SDR R61A2021120400983](https://openairdocs.org/sdr/R61A2021120400983), Nov 18, 2021: DOUBLER. CORRODED. CORROSION ON SKIN AFTER REMOVAL OF INTERCASOTAL, AREA OF HOT DRAIN MAST. REMOVED AND REPLACED INTERNAL HOT DRAIN MAST DOUBLER PER SRM 51-40-05
- [SDR R61A2021120400974](https://openairdocs.org/sdr/R61A2021120400974), Nov 13, 2021: SHEAR ANGLE. CORRODED. CORROSION ON SHEAR CLIP FR 90 BETWEEN STGR 28R AND 29R. REMOVED AND REPLACED SHEAR CLIP PER SRM 51-40-08.
- [SDR R61A2021120400981](https://openairdocs.org/sdr/R61A2021120400981), Nov 10, 2021: INTERCOSTAL. CORRODED. CORROSION ON INTERCOSTAL AFT OF HOT DRAIN MAST INTERNAL SIDE OF FUSELAGE FROM FR 86-87 STGR 26R - 25R. REMOVED AND REPLACED INTERCOSTAL BETWEEN FRAME 86-87 BETW
- [SDR R61A2021120400980](https://openairdocs.org/sdr/R61A2021120400980), Nov 10, 2021: INTERCOSTAL. CORRODED. CORROSION ON INTERCOSTAL FWD OF HOT DRAIN MAST INTERNAL SIDE OF FUSELAGE FROM FR 86 - 87 STGR 26R - 25R. REMOVED AND REPLACED INTERCOSTAL BETWEEN FRAME 86-87 BE
- [SDR R61A2021120400972](https://openairdocs.org/sdr/R61A2021120400972), Nov 10, 2021: SHEAR TIE. CORRODED. CORRODED SHEAR CLIP AND HARDWARE AT FR 87 , STGR 27R - 28R AS MARKED. CORRODED SHEAR CLIP AND HARDWARE AT FR 87 , STGR 27R - 28R AS MARKED. EVALUATED SHEAR CLIP
- [SDR R61A2021120400971](https://openairdocs.org/sdr/R61A2021120400971), Nov 10, 2021: SHEAR TIE. CORRODED. CORRODED SHEAR CLIP AT FRAME 90, STGR 29R - 28R. REMOVED SHEAR CLIP AT FRAME 90, STGR 29R - 28R REF SRM 51-40-08 CORRECTIVE ACTION INSTALLED NEW SHEAR CLIP AT F
- [SDR R61A2021120400970](https://openairdocs.org/sdr/R61A2021120400970), Nov 10, 2021: SHEAR TIE. CORRODED. CORRODED SHEAR CLIP AT FR 76, STGR 29R -29L AS MARKED. REMOVED AND REPLACED SHEAR CLIP AT FR 76, STGBR 29R - 29L REF : EMB 175 SRM 51-40-08
- [SDR R61A2021120400969](https://openairdocs.org/sdr/R61A2021120400969), Nov 10, 2021: SHEAR TIE. CORRODED. CORRODED SHEAR CLIP AND HARDWARE AT FR 88, STGR 27R - 28R AS MARKED. REMOVED AND REPLACED SHEAR CLIP AT FR - 88 OTBD OF STGR 28 REF SRM 51-40-08. INSTALL WAS CO
- [SDR R61A202101150053](https://openairdocs.org/sdr/R61A202101150053), Jan 14, 2021: PRESSURE SWITCH. MALFUNCTIONED. PARKING BRAKE NOT RELEASED EICAS MESSAGE IN FLIGHT. DECLARED EMERGENCY, LANDED WITHOUT INCIDENT. R & R EMERGENCY/PARKING BRAKE PRESSURE SWITCHES 1 AND 2. OPERAT
- [SDR R61A2020102200700](https://openairdocs.org/sdr/R61A2020102200700), Oct 19, 2020: BATTERY PACK. DISCHARGED. ONE EMERGENCY EXIT SIGN IN BACK AND ONE ABOVE ROW 17 GOING OFF AND ON DURING TEST. CHARGED BATTERIES, OPERATIONS CHECK GOOD, IAW AMM 33-50-00.
- [SDR R61A2020060200514](https://openairdocs.org/sdr/R61A2020060200514), May 30, 2020: FLAP. DIRTY. DOOR R2 ARM VENT FLAP LEVER VERY DIFFICULT TO ACTUATE. CLEANED AND LUBED R2 ARM VENT FLAP, OPS CHECK GOOD.
- [SDR R61A2020022860271](https://openairdocs.org/sdr/R61A2020022860271), Feb 26, 2020: SLIDE. PARTIAL DEPLOY. L2 EMERGENCY SLIDE PARTIALLY DEPLOYED. R&R L2 DOOR SLIDE PER AMM 25-65-01 AND FLEX BALL CABLE PER R170EO-52-10-0001.
- [SDR R61A201909250998](https://openairdocs.org/sdr/R61A201909250998), Sep 25, 2019: BEAM. CORRODED. WHILE IN HEAVY CHECK - WHILE PERFORMING L2 DOOR LOWER BEAM REWORK, CORROSION FOUND ON UPPER FLANGE AREA. REMOVED AND REPLACED NEW L2 DOOR LOWER BEAM, REF SRM 51
- [SDR R61A201909250997](https://openairdocs.org/sdr/R61A201909250997), Sep 25, 2019: CROSSBEAM. CORRODED. WHILE IN HEAVY CHECK - CORROSION ON FR 84, RT SIDE CROSSBEAM. PERFORMED PERMANENT REPAIR OF UPPER FLANGE OF CROSSBEAM 84 ON RT SIDE BY WAY OF FABRICATION AND IN
- [SDR R61A201909250996](https://openairdocs.org/sdr/R61A201909250996), Sep 25, 2019: RIB. CRACKED. WHILE IN HEAVY CHECK - LT HORIZONTAL STABILIZER RIB 12 CRACKED BETWEEN FRONT AND MID SPAR AT 4TH AND 5TH FASTENERS FROM THE FRONT AS MARKED. REMOVED AND REPLACE
- [SDR R61A201909250995](https://openairdocs.org/sdr/R61A201909250995), Sep 25, 2019: RIB. CRACKED. WHILE IN HEAVY CHECK - LT HORIZONTAL STABILIZER RIB 11 CRACKED BETWEEN FRONT AND MID SPAR AT 5TH FASTENER FROM THE FRONT AS MARKED. REPAIRED LT HORIZONTAL STABI
- [SDR R61A201909250994](https://openairdocs.org/sdr/R61A201909250994), Sep 25, 2019: RIB. CRACKED. WHILE IN HEAVY CHECK - RT HORIZONTAL STABILIZER RIB 11 CRACKED BETWEEN FRONT AND MID SPAR AT SECOND TO LAST FASTENER FROM THE FRONT AS MARKED. REMOVED AND REPLA
- [SDR R61A201909250993](https://openairdocs.org/sdr/R61A201909250993), Sep 25, 2019: SERVICE DOOR. CORRODED. WHILE IN HEAVY CHECK - WASTE SERVICE PANEL INTERNAL SIDE HAS CORROSION AROUND LATCHES. REMOVED AND REPLACE WASTE SERVICE DOOR REF AMM 20-10-01.
- [SDR R61A201909250992](https://openairdocs.org/sdr/R61A201909250992), Sep 25, 2019: SHEAR PANEL. CORRODED. WHILE IN HEAVY CHECK - CORROSION-AFT WET AREA FLOOR STRUCTURE LT SHEAR PANEL FR87-88. REMOVED AND REPLACED LT SHEAR PANEL FR87-88 REF SRM 51-40-08,
- [SDR R61A201909250991](https://openairdocs.org/sdr/R61A201909250991), Sep 25, 2019: SHEAR PANEL. CORRODED. WHILE IN HEAVY CHECK - CORROSION-AFT WET AREA FLOOR STRUCTURE RT SHEAR PANEL FR87-88. REPLACED AFT WET AREA FLOOR STRUCTURE RT SHEAR PANEL FR87-88 IAW SRM 53-23
- [SDR R61A201909250990](https://openairdocs.org/sdr/R61A201909250990), Sep 25, 2019: DOOR SILL. CORRODED. WHILE IN HEAVY CHECK - CORROSION AT FR 88 - FR 89 RT SIDE OF FUSELAGE AS MARKED. REPLACED RT SILL WITH NEW FR 88-89 AND RESTORED FINISH REF SRM 51-75-16, 51-40-
- [SDR R61A2018112191174](https://openairdocs.org/sdr/R61A2018112191174), Nov 19, 2018: LINKAGE. OUT OF ADJUST. R2 DOOR "DISARMED" INDICATION IS NOT SHOWING IN WINDOW. ADJUSTED ARM/DISARM LINKAGE. OPS CHECK GOOD IAW AMM 52-42-22.
- [SDR R61A201710050730](https://openairdocs.org/sdr/R61A201710050730), Oct 5, 2017: DIAPHRAGM. DAMAGED. L1 PNEUMATIC ASSY READS 0 PSI. R & R L1 DOOR DIAPHRAGM IAW AMM 52-11-53.
- [SDR R61A201706260445](https://openairdocs.org/sdr/R61A201706260445), Jun 15, 2017: SHEAR TIE. CORRODED. CORRODED SHEAR TIE, FRAME 90, STRINGER 28R. REMOVED, FABRICATED, AND INSTALLED A NEW SHEAR TIE IAW SRM 51-41-01, AND ETD2017-170-052758.
- [SDR R61A201706270456](https://openairdocs.org/sdr/R61A201706270456), Jun 12, 2017: SHEAR TIE. CORRODED. CORRODED SHEAR TIE AT FRAME 89, STRINGER 29R. INSTALLED A NEW SHEAR TIE IAW SRM 51-41-01.
- [SDR R61A201706270455](https://openairdocs.org/sdr/R61A201706270455), Jun 12, 2017: STRINGER SPLICE. CORRODED. CORRODED STRINGER 29L SPLICE AT FRAME 91. REMOVED AND REPLACED THE STRINGER SPLICE IAW SRM 51-43-04, 51-41-01, AND 51-42-02.
- [SDR R61A201706260444](https://openairdocs.org/sdr/R61A201706260444), Jun 12, 2017: SHEAR TIE. CORRODED. CORROSION ON SHEAR TIE AT FRAME 90, STRINGER 28L. REMOVED AND REPLACED THE SHEAR TIE IAW SRM 51-41-01, AND 51-41-02.
- [SDR R61A201706260443](https://openairdocs.org/sdr/R61A201706260443), Jun 12, 2017: SHEAR TIE. CORRODED. CORROSION ON SHEAR TIE AT FRAME 89 BETWEEN STRINGERS 29R - 29L. REMOVED AND REPLACED THE SHEAR TIE IAW SRM 51-41-02.
- [SDR R61A201706260442](https://openairdocs.org/sdr/R61A201706260442), Jun 12, 2017: SHEAR TIE. CORRODED. CORROSION ON SHEAR TIE, FRAME 90 BETWEEN STRINGERS 29L- 27R. REMOVED AND REPLACED THE SHEAR TIE IAW SRM 51-41-01, AND 51-41-02.
- [SDR R61A201706260441](https://openairdocs.org/sdr/R61A201706260441), Jun 12, 2017: SHEAR TIE. CORRODED. CORROSION ON SHEAR TIE AT FRAME 90 BETWEEN STRINGERS 27R- 29L. REMOVED AND REPLACED THE SHEAR TIE IAW SRM 51-41-01, AND 51-41-02.
- [SDR R61A201706260440](https://openairdocs.org/sdr/R61A201706260440), Jun 12, 2017: SHEAR TIE. CORRODED. CORROSION FOUND ON THE SHEAR TIE AT FRAME 90 BETWEEN STRINGERS 29L - 27R. REMOVED AND REPLACED THE SHEAR TIE IAW SRM 51-41-01, AND 51-41-02.
- [SDR R61A201706260439](https://openairdocs.org/sdr/R61A201706260439), Jun 11, 2017: STRINGER. CORRODED. STRINGER 28R SPLICE CORRODED AT FRAME 91. REMOVED AND REPLACED THE STRINGER SPLICE IAW SRM 51-41-02 , 51-41-01, AND 51-43-04.
- [SDR R61A201706260438](https://openairdocs.org/sdr/R61A201706260438), Jun 10, 2017: SUBFRAME. CORRODED. FOUND CORROSION ON SUBFRAME LOCATED BETWEEN FRAME 90 AND THE PRESSURE BULKHEAD, STRINGER 27L TO 27R. REPAIREDIAW ETD2017-170-051290.
- [SDR R61A201706270469](https://openairdocs.org/sdr/R61A201706270469), Jun 9, 2017: DOUBLER. CORRODED. CORROSION ON AFT HOT WATER DRAIN MAST DOUBLER BETWEEN FR 86-FR 87 IN AFT CARGO. REMOVED AND REPLACED AFT HOT WATER DRAIN MAST DOUBLER AND ATTACHING SUPPORT ANGL
- [SDR R61A201706270466](https://openairdocs.org/sdr/R61A201706270466), Jun 9, 2017: STRINGER. CORRODED. CORROSION ON STR 29R BETWEEN FR 85-88 IN AFT CARGO. PERFORMED SPLICE REPAIR OF STR 29R ON P/N 170-91888-003 SEE EAMS W/O H5690 SEQ 1648 SN 518 FOR WORK DETAILS.
- [SDR R61A201706270465](https://openairdocs.org/sdr/R61A201706270465), Jun 9, 2017: SKIN. CORRODED. CORROSION ON INTERNAL SKIN BETWEEN FRAMES 85 - 88, STRINGER 29L - 29R. PERFORMED DOUBLER REPAIR IAW ETD2017-170-051866.
- [SDR R61A201706270462](https://openairdocs.org/sdr/R61A201706270462), Jun 9, 2017: SHEAR TIE. CORRODED. CORRODED ON SHEAR TIE AT FRAME 81 BETWEEN STRINGERS 27R - 28L. REPLACED THE SHEAR TIE IAW SRM 51-41-01, AND 51-41-02.
- [SDR R61A201706270454](https://openairdocs.org/sdr/R61A201706270454), Jun 9, 2017: SHEAR TIE. CORRODED. CORRODED SHEAR TIE AT FRAME 89, BETWEEN STRINGERS 27R & 28R, R & R THE SHEAR TIE IAW SRM 51-41-01, AND 51-41-02.
- [SDR R61A21706270453](https://openairdocs.org/sdr/R61A21706270453), Jun 9, 2017: SHEAR TIE. CORRODED. CORODED SHEAR TIE AT FRAME 88, BETWEEN STRINGERS 27R & 28R. REMOVED AND REPLACED THE SHEAR TIE IAW SRM 51-41-01, & 51-41-02.
- [SDR R61A201706270452](https://openairdocs.org/sdr/R61A201706270452), Jun 9, 2017: SHEAR TIE. CORRODED. CORRODED SHEAR TIE AT FRAME 87, BETWEEN STRINGERS 27L & 27R. REMOVED AND REPLACED THE SHEAR TIE IAW SRM 51-41-01, AND 51-41-02.
- [SDR R61A201706270451](https://openairdocs.org/sdr/R61A201706270451), Jun 9, 2017: SHEAR TIE. CORRODED. CORRODED SHEAR TIE AT FRAME 86, BETWEEN STRINGERS 27L- 27R. REMOVED AND REPLACED THE SHEAR TIE IAW SRM 51-41-01, AND 51-41-02.

All 155: https://openairdocs.org/aircraft/N121HQ/reports.md

## 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-Empresa Brasileira De 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/N121HQ/stcs.md

## Related

- Other Embraer-Empresa Brasileira De ERJ 170-200 LR aircraft: https://openairdocs.org/model/embraer-empresa-brasileira-de-erj-170-200-lr/aircraft.md
- The GE CF34-8E5 engine: https://openairdocs.org/engine/ge-cf34-8e5.md

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