# STCs that may be installed: N33CP A list on [N33CP](https://openairdocs.org/aircraft/N33CP.md). Approved for this aircraft’s airframe or engine model. The registry doesn’t record which STCs an aircraft has; its records do. In force first, then newest. - [STC ST01305WI-D](https://openairdocs.org/stc/ST01305WI-D.md): Modification of a Collins ALT-50A or ALT-55B Radio Altimeter system installation to a Collins ALT-1000 or ALT-4000 Radio Altimeter system installation in accordance with Collins Drawing Index as listed on AML No. ST01305WI-D, Revision -, or later FAA approved revision. · Rockwell Collins Inc - [STC ST04105NY](https://openairdocs.org/stc/ST04105NY.md): Installation of Flight Data Recorder, Flight Data Acquisition Unit, Traffic Advisory Altering System and Navigation Suite · CASA Flight Tech LLC - [STC ST04109NY](https://openairdocs.org/stc/ST04109NY.md): Update of COMBI · CASA Flight Tech LLC - [STC ST02257AK](https://openairdocs.org/stc/ST02257AK.md): Modify the aircraft configuration from 23 passenger seats to a combined cargo and passenger configuration. · CASA Flight Tech LLC - [STC ST02046AK](https://openairdocs.org/stc/ST02046AK.md): nstallation of Allied Signal (Sundstrand) Mark VI Ground Proximity Warning System · Erickson Incorporated - [STC ST02047AK](https://openairdocs.org/stc/ST02047AK.md): Installation of Trimble TNL 2101 I/O global positioning system. · Erickson Incorporated - [STC ST02048AK](https://openairdocs.org/stc/ST02048AK.md): Installation of Trimble TNL 2100T global positioning system. · Erickson Incorporated - [STC ST02414AK](https://openairdocs.org/stc/ST02414AK.md): Reduction/limitation of passenger seats to 19 or fewer · Erickson Incorporated - [STC ST00065MC](https://openairdocs.org/stc/ST00065MC.md): Installation of a Ballistic Protection System (BPS) · Erickson Incorporated - [STC ST03558AT](https://openairdocs.org/stc/ST03558AT.md): Installation of a Collins TCAS-4000 (TCAS II) System (Version 7.0) with dual Collins TVI-920D VSI/TA/RA Indicators and associated hardware. · Woven Electronics, LLC - [STC ST04177AT](https://openairdocs.org/stc/ST04177AT.md): Installation of a Talon Aerospace LED Replacement General Purpose Lamps · Aaxico Technical Services Inc. - [STC ST02548AK](https://openairdocs.org/stc/ST02548AK.md): Installation of Main Gear Gravel Deflectors · Aero Twin Inc - [STC ST04200NY](https://openairdocs.org/stc/ST04200NY.md): Installation of 19 Martin Baker Aircraft Company Inc. Seat · Carson Helicopters Inc - [STC ST02540AK](https://openairdocs.org/stc/ST02540AK.md): Fabrication and installation of Aero Twin, Inc., Rudder Gust Lock Kit No. 4111-212 · Aero Twin Inc - [STC ST02433LA](https://openairdocs.org/stc/ST02433LA.md): Installation of LifePort Triple Litter Stacking System (TLSS) · LifePort LLC - [STC ST02099SE](https://openairdocs.org/stc/ST02099SE.md): Installation of a Supplemental Lighting System; manufactured and installed · Aviation Specialties Unlimited Inc. - [STC ST03993AT](https://openairdocs.org/stc/ST03993AT.md): Installation of a Universal Avionics EFI-890R Electronic Flight Instruments System (EFIS). · Air Data Consulting Group, Inc. - [STC ST03776NY](https://openairdocs.org/stc/ST03776NY.md): 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 ST04157AT](https://openairdocs.org/stc/ST04157AT.md): Installation of Concorde lead acid batteries to replace nickel-cadmium (NiCd) batteries along with associated hardware · AAR Airlift Group - [STC ST04178AT](https://openairdocs.org/stc/ST04178AT.md): Replace original equipment Nickel-Cadmium (NiCd) main and auxiliary batteries with Concorde Lead-Acid, main and auxiliary batteries along with associated hardware · Concorde Battery Corporation - [STC ST02401AK](https://openairdocs.org/stc/ST02401AK.md): Installation of a Nose Gear Gravel Deflector · Aero Twin Inc - [STC ST00673WI-D](https://openairdocs.org/stc/ST00673WI-D.md): Modification of Collins VHF-22A/VHF-22B VHF COMM Receiver Transmitter with CTL-22 Control Pro Line II System Installation to a Collins VHF-22C/VHF-22D VHF COMM Receiver Transmitter with CTL-22C Control 8.33 kHz Pro Line II System installation. · Rockwell Collins Inc - [STC ST02559AK](https://openairdocs.org/stc/ST02559AK.md): Installation of Aero Twin, Inc. CASA 212 Exhaust Deflector, part number AT-CASA-EXDF-1001 · Aero Twin Inc - [STC SA1315SO](https://openairdocs.org/stc/SA1315SO.md): Installation of refreshment center. · Aeronautical Engineers, Inc · Lists C-212 Series - [STC ST00335NY](https://openairdocs.org/stc/ST00335NY.md): Remove existing starter-generator and install Aircraft Parts Corporation (APC) starter generator P/N · Shurka Aerospace Inc - [STC ST02346AK](https://openairdocs.org/stc/ST02346AK.md): Restricted category installation of a Forward Looking Infrared (FLIR) system · ConocoPhillips Company - [STC ST01142WI-D](https://openairdocs.org/stc/ST01142WI-D.md): Modification of a single or dual Collins TDR-94 or TDR-94D Mode S Transponder System installation with CTL-92 control head to a Flight ID capable Collins TDR-94 or TDR-94D Mode S Transponder System installation with CTL-92E control head. · Rockwell Collins Inc - [STC ST03305AT](https://openairdocs.org/stc/ST03305AT.md): Installation of a SINGLE Class-A Sandel ST3400 Terrain Awareness Warning System (TAWS), pilot and co-pilot annunciator panels, and Air Data Computer (ADC). · Presidential Airways Inc - [STC ST01394WI-D](https://openairdocs.org/stc/ST01394WI-D.md): Modification of a Collins CTL-23 or CTL-23C VHF COMM/NAV Control Panel System installation. · Rockwell Collins Inc - [STC ST01398NY](https://openairdocs.org/stc/ST01398NY.md): Installation of Universal Avionics Systems Corporation CVR-120 cockpit voice recorder (CVR). Approved for serial number 405 ONLY. · Sierra Nevada Corporation/Integrated Mission Systems - [STC ST01307WI-D](https://openairdocs.org/stc/ST01307WI-D.md): Modification of a Collins TVI-920/TVI-920D Vertical Speed/TCAS Indicator installation · Rockwell Collins Inc - [STC ST10215SC](https://openairdocs.org/stc/ST10215SC.md): Installation of Honeywell Mark VI Enhanced Ground Proximity Warning System (EGPWS) equipped with a HOneywell KMD 850 Multi-Function Display (MFD). · Bighorn Airways Inc - [STC SA5603NM-D](https://openairdocs.org/stc/SA5603NM-D.md): Installation of a Fairchild A100/A100A cockpit voice recorder. · Learjet Inc - [STC SA01900AT](https://openairdocs.org/stc/SA01900AT.md): Installation of a 9 seat passenger configuration. · Gryphon Group International, Inc · Lists C-212 Series - [STC ST00608NY-D](https://openairdocs.org/stc/ST00608NY-D.md): Installation of cargo smoke detector system. · CASA Aircraft USA, Inc. - [STC ST00615NY-D](https://openairdocs.org/stc/ST00615NY-D.md): Installation of Cargo Interior. · CASA Aircraft USA, Inc. - [STC SA971NE](https://openairdocs.org/stc/SA971NE.md): Installation of a single trimble TNL-3000 GPS/LORAN navigationsystem. · Summit Aviation, Inc · Lists C-212 Series - [STC SA3903NM](https://openairdocs.org/stc/SA3903NM.md): Installation of pedestal covers. · American Casa Distributor Inc. - [STC SA2135NM](https://openairdocs.org/stc/SA2135NM.md): Class B aft baggage compartment -9G bulkhead, coat closet, baggage storage and refreshment service unit. · Flight Structures Inc · Lists C-212 Series - [STC SA2570CE](https://openairdocs.org/stc/SA2570CE.md): Replace the original generator control units with Phoenix Aerospace, Inc., Model GC-1010-24-3B solid state generator control units. · Phoenix Aerospace Inc · Lists C-212 Series - [STC SE00265AT](https://openairdocs.org/stc/SE00265AT.md): Install Ayres Fuel Manifold Purge Assembly Kit, P/N 21757-1 in accordance with "Installation Instructions - Ayres P/N 21757-1 Fuel Manifold Purge Assy-Kit" Dwg. No. 21757-1(1), Revision none, dated April 20, 1993, or later FAA approved revision. · Thrush Aircraft Inc. ## The whole list in SQL Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS: ```sql SELECT m.matched_by, s.stc_number, s.description, s.holder, s.status, s.status_date, m.matched_model FROM ( SELECT stc_number, min(side) AS side, arg_min(matched_by, side) AS matched_by, arg_min(matched_model, side) AS matched_model FROM (SELECT stc_number, 1 AS side, 'airframe' AS matched_by, matched_model FROM 'https://openairdocs.org/data/latest/faa_aircraft_model_stc.parquet' WHERE aircraft_model_code = '2410205' UNION ALL SELECT stc_number, 2, 'engine', matched_model FROM 'https://openairdocs.org/data/latest/faa_engine_model_stc.parquet' WHERE engine_model_code = '29064') GROUP BY stc_number ) m JOIN 'https://openairdocs.org/data/latest/faa_stc.parquet' s USING (stc_number) ORDER BY m.side, s.status = 'Current' DESC, s.status_date DESC, s.stc_number ``` This list as a web page: https://openairdocs.org/aircraft/N33CP/stcs --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.