# TCDS A4EA: Helio Aircraft LLC - Type: Type certificate data sheet - Status: Current - Holder: Helio Aircraft LLC - Revision: 16 - Revised: August 21, 2015 - Product: Aircraft, Small Airplane - Certification basis: Part 3, CAR 3 - Registered aircraft: 3, by the registry models matched to it (OpenAirDocs) - Data sheet PDF: https://openairdocs.org/files/sha256/89/3e/893e4b06a6757ee6f81f48dab07a8c37a8f3ef1d2ebfc2c8705c6f5495588574 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/41AEDA21700CB4C486257EB20078402C.0001 - Page: https://openairdocs.org/tcds/A4EA ## Models (2) As the data sheet lists them. - HST-550A (USAF AU-24A) (Stallion) - HST-550 (Stallion) ## What the data sheet says From the PDF's text layer, line by line; tables lose their columns. The PDF is the record. ```text Page No. 1 2 3 4 5 6 Rev. No. 16 11 15 11 15 16 DEPARTMENT OF TRANSPORTATION FEDERAL AVIATION ADMINISTRATION A4EA Revision 16 HELIO HST-550 HST-550A (USAF AU-24A) August 21, 2015 TYPE CERTIFICATE DATA SHEET NO. A4EA This data sheet, which is a part of Type Certificate No. A4EA, prescribes conditi ons and limitations under which the product, for which the type certificate was issued, meets the airworthiness requirements of the Civil Air Regulations/Federal Aviation Regulations. Type Certificate Holder Helio Aircraft, LLC (See Note 5 for Holder Record) 38400 N. Schoolhouse Road, #17 Cave Creek, Arizona 85331 I. Model HST-550, Stallion, 10 PCLM (Normal Category), approved August 26, 1965 Engine United Aircraft of Canada, Ltd. PT6A-6A (turboprop) Fuel JP-1, JP-4, and JP-5 fuels conforming to P&WA Spec. No. 522 Oil (Engine and Gearbox) UACL PT-6 Engine Service Bulletin No. 1 lists approved brand oils Engine Limits Static Sea Level Ratings (see NOTE 4 for additional limits) Shaft H.P. Jet Thrust ESHP Gas Gen. RPM -% Propeller Shaft Speed Max. Perm. Turbine Inlet Temp. °C. Max. Torque PSIG Takeoff (2 min.) 550 70 578 38,100-101.5 2,200 994 42.5 Max. continuous 500 62 525 38,100-101.5 2,200 952 38.5 Starting trans. (2 sec.) 1,038 Max. reverse (1 min.) 500 38,100-101.5 2,000 994 42.5 At low altitude and low ambient temperature, the engines may produce more power at takeoff than the airplane has been certified for. Under these conditions, the placarded torquemeter limitations should not be exceeded. Oil Temperature Minus 40°F. to 185°F. maximum continuous Minus 40°F. to 195°F. not to exceed 5 minutes Propeller and Propeller Hartzell Model HC-B3TN-3/T-10173C Limits Diameter: 101 in. (2 percent reduction allowable for repairs) Pitch settings at 30 in. station: Low 16° Feathered 78° Reverse -17° Airspeed Limits (CAS) Maneuvering VP 121 m.p.h. (105 knots) Maximum structural cruising VNO 201 m.p.h. (175 knots) Never exceed VNE 226 m.p.h. (197 knots) Flap extended VFE 109 m.p.h. ( 95 knots) A4EA 2 I. Model HST-550 (cont'd) C.G. Range At gross weight 127.70 in. to 137.80 in. At reduced weight 3,298 lb. 123.30 in. Straight line variation between points given Leveling Means For leveling the airplane, use the floorboards under the pilot's or co-pilot's seat Empty Weight C.G. Range None Maximum Weight 5,100 lbs. Minimum Crew One pilot in the left front seat Number of Seats 10 (2 at +103.5 in., 3 at +131 in. (aft-facing), 3 at +171 in., 2 at +209 in.) Maximum Baggage See cargo limits in NOTE 2(c). Fuel Capacity 120 gallons (total usable in 2 tip tanks - 51 gallons each) 61 gallons (total usable in 2 auxiliary tanks - 30.5 gallons each) 61 gallons (total usable in 2 main tanks - 30.5 gallons each) Oil Capacity 1.5 gallons (total usable in engine integral tank. See NOTE 1(a) for undrainable oil. Control surface movements Wing flaps Up 0° Down 40° Aileron (±1° Up 20° Down 20° Stabilator (trailing edge) Up 25° Down 8°, from neutral (±1°) Neutral is 2.5° (down) from horizontal reference. Stabilator (trim tabs (±2°)) Measured from horizontal stabilator chordline Tab trailing edge up (+) Tab trailing edge down (-) Stabilator neutral ±19.1° pilot's trim indicator full nose down -31.7° pilot's trim indicator full nose up Stabilator trailing edge +37.9° pilot's trim indicator full nose down Full up +30.4° pilot's trim indicator full nose up Stabilator trailing edge +4° pilot's trim indicator full nose down Full down -44.3° pilot's trim indicator full nose up Stabilator anti-balance Same tabs as trim tabs - measured in same manner Tabs (±2°) Trim indicator neutral Stabilator neutral, 0° Stabilator T.E. full up 25° from neutral +42.9° Stabilator T.E. full -20° down 8° from neutral Flap trim interconnect tab Flaps full down +40° +2°, -1° Rudder Right 25° Left 25° Rudder trim tab Right 25° Left 25° measured from rudder chordline Equipment The basic required equipment as prescribed in the applicable airworthiness regulations (see Certification Basis) must be installed in the aircraft for certification. In addition, the following items of equipment are required: (a) Shoulder harnesses as well as seat belts must be installed for first row of seats. (b) FAA Approved Flight Manual, Helio Model HST-550, dated August 26, 1965, revised November 9, 1965. Serial Nos. Eligible 1 and up 3 A4EA II. Model HST-550A (USAF AU-24A), Stallion, 10 PCLM (Normal Category), approved August 1, 1969 Engine United Aircraft of Canada, Ltd. PT6A-27 (turboprop) Fuel JP-1, JP-4, and JP-5 fuels conforming to P&WA Spec. No. 522 (Engine and gearbox) synthetic type conforming to CPN Spec. 202 as revised. UACL Engine Service Bulletin No. 1 lists approved brand oils Engine Limits Static Sea Level Ratings (see NOTE 4 for additional limits) Shaft H.P. Jet Thrust ESHP Gas Gen. RPM -% Propeller Shaft Speed Max. Perm. Turbine Inlet Temp. °C. Max. Torque PSIG Takeoff (2 min.) 680 90 715 38,100-101.5 2,200 725 53 Max. continuous 500 70 528 38,100-101.5 2,200 695 38.5 Starting trans. (2 sec.) 1,090 Max. reverse (1 min.) 620 38,100-101.5 2,100 725 53 At low altitude and low ambient temperature, the engines may produce more power at takeoff than the airplane has been certified for. Under these conditions, the placarded torquemeter limitations should not be exceeded. Oil Temperatures Minus 40° F. to 210°F. maximum continuous Propeller and Propeller Hartzell Model HC-B3TN-3/T-10178CH Limits Diameter: 101 in. (2 percent reduction allowable for repairs) Pitch settings at 30 in. station: Low 14° ± 1° Feathered 87° ± 1° Reverse -12° ± 1° Airspeed Limits (CAS) Maneuvering VP 124 m.p.h. (108 knots) Maximum structural cruising VNO 194 m.p.h. (169 knots) Never exceed VNE 218 m.p.h. (190 knots) Flap extended VFE 109 m.p.h. ( 95 knots) C.G. Range At gross weight 127.70 in. to 137.80 in. At reduced weight 3,624 lb. 121.90 in. Straight line variation between points given Empty Wt. C.G. Range None Leveling Means For leveling the airplane, use lower surface of wing carry through structure which is 4.5° nose up to W.L. zero Maximum Weight 5,100 lbs. Minimum Crew One pilot in the left front seat No. of Seats 10 (2 at +103.5 in., 3 at +144 in., 3 at +176 in., 2 at +209 in.) Maximum Baggage See cargo limits in NOTE 2(c). Fuel capacity 60 gallons (total usable in 2 auxiliary tanks - 29.5 gallons each) 60 gallons (total usable in 2 main tanks - 29.5 gallons each) Oil capacity 1.5 gallons (total usable in engine integral tank. See NOTE 1(b) for data on system fuel and oil. A4EA 4 II. Model HST-550A (USAF AU-24A) (cont'd) Control surface movements Wing flaps Up 0° Down 40° Aileron (±1°) Up 20° Down 20° Stabilator (trailing edge) Up 25° Down 8°, from neutral Neutral is 2.5° (down) from horizontal reference Stabilator (trim tabs (±2°)) Measured from horizontal stabilator chordline Tab trailing edge up (+) Tab trailing edge down (-) Stabilator neutral +19.1° pilot's trim indicator full nose down -31.7° pilot's trim indicator full nose up Stabilator trailing edge +37.9° pilot's trim indicator full nose down Full up +30.4° pilot's trim indicator full nose up Stabilator trailing edge +4° pilot's trim indicator full nose down Full down -44.3° pilot's trim indicator full nose up Stabilator anti-balance Same tabs as trim tabs - measured in same manner Tabs (±2°) Trim indicator neutral Stabilator neutral 0° Stabilator T.E. full +42.9° up 25° from neutral Stabilator T.E. full -20° down 8° from neutral Flap down interconnect tab Flaps full down +40° +0°, -2° Rudder Right 25° ±2° Left 25° ±2° Rudder trim tab Right 25° ±1° Left 10° ± 1° measured from rudder chordline Additional Requirements and Limitations for HST-550A Airplanes for 5,800 lbs. Gross Weight Certification The airplane must incorporate the modifications listed on Helio Aircraft Limited Drawing 550-000-051. Airspeed Limits (CAS) Maneuvering VP 111 m.p.h. Maximum structural cruising VNO 159 m.p.h. Never exceed VNE 199 m.p.h. Flaps extended VFE 95 m.p.h. C.G. Range At gross weight 130.5 in. to 137.8 in. At 3,624 lbs. or less 121.9 in. to 137.8 in. Straight line variation between points given. Maximum Weight 5,800 lbs. Fuel Capacity 102 gallons (total usable in 2 tip tanks - 51 gallons each) 60 gallons (total usable in 2 auxiliary tanks - 29.5 gallons each) 60 gallons (total usable in 2 main tanks - 29.5 gallons each) Equipment The basic required equipment as prescribed in the applicable airworthiness regulations (see Certification Basis) must be installed in the aircraft for certification. In addition, the following items of equipment are required: (a) Shoulder harnesses as well as seat belts must be installed for first row of seats. (b) FAA Approved Flight Manual, Helio Model HST-550A (USAF AU-24A) Revision F dated October 19, 1972, for airplanes with 5,100 lbs. gross weight. (c) Stick-force augmentation system must be installed and operative. (d) Stabilator hydraulic damper must be installed and operative. (e) FAA Approved Flight Manual, Helio Model HST-550A, dated June 20, 1978, for airplanes with 5,100 lbs. and 5,800 lbs. gross weight. 5 A4EA II. Model HST-550A (USAF AU-24A) (cont'd) Serial Nos. Eligible Serial Numbers -001 and up. Prior to civil certification, AU-24A airplanes must be modified in accordance with Helio Drawing 550-000-050 which may be obtained from the manufacturer. An FAA representative, upon determination of compliance with the above mentioned drawing, may issue an airworthiness certificate. DATA PERTINENT TO ALL MODELS Datum Longitudinal reference Station 0 located 114 in. forward of leading edge of wing proper (slats in). 115,83 in. forward of leading edge of wing with slats extended. Horizontal reference is 38.75 in. below centerline of and parallel to fuselage lower longeron. Certification Basis Application for type certificate dated October 8, 1963. Part 3 of the Civil Air Regulations dated May 15, 1956, as amended by 3-1 through 3-8. Special Conditions for CAR 3 turbine-powered aircraft submitted with February 11, 1964, FAA letter to Helio and amended by September 9, 1964, FAA letter to Helio. Type Certificate No. A4EA issued August 26, 1965. Production Basis None. Prior to original certification, an FAA representative must perform a detailed inspection for workmanship, materials, and conformity with the approved technical data, a final inspection of the completed aircraft, and a check of the flight characteristics. NOTE 1. (a) Current Model 550 weight and balance report including list of equipment included in the certificat ed empty weight and loading instructions when necessary must be provided for each aircraft at the time of original certification. The certificated empty weight and corresponding center of gravity location must include unusable fuel of 16 lb. main and auxiliary (+160); 15 lb. tip tanks at (+144) and undrainable oil of 0.8 lb. at (+43). (b) Current Model 550A weight and balance report including list of equipment included in the certificated empty weight and loading instructions when necessary must be provided for each aircraft at the time of original certification. The certificated empty weight and corresponding center of gravity location must include unusable fuel of 16 lb. main and auxiliary (+160); and undrainable oil of 0.8 lb. at (+43). NOTE 2. (a) The following placards must be in view of the pilot: (1) "This airplane must be operated as a normal category airplane in compliance with the operating limitations stated in the form of placards, markings, and manual." (2) "No acrobatic maneuvers (including spins) are approved." (b) All other placards required in the approved airplane flight manual must be installed in the appropriate locations. (c) On Model 550 fuselage tailcone bulkhead at tailcone station 22.53: "1. Total cargo load carried on the floor not to exceed 2153 lbs. 2. Cargo density not to exceed 68 lbs. per square foot. 3. Maximum cargo weight per cargo lug 312 lbs." (d) On Model 550A fuselage tailcone bulkhead at tailcone station 22.53: "See AFM for cargo loading and tie-down instructions." NOTE 3. Airworthiness Limitations for any mandatory retirement life or mandatory inspection are included in the Maintenance Manual (Instructions for Continued Airworthiness) for each model. NOTE 4. The maximum propeller shaft overspeed limit is 110 percent at all ratings and may be employed for sustained periods in emergencies. Gas generator speeds up to 102.7 percent are permissible for 10 seconds and 101.6 percent for unlimited periods, subject to applicable temperature and other limits. A4EA 6 NOTE 5. Type Certificate Holder Record: Reissued to Helio Aircraft Company August 1, 1969 Reissued to Helio Aircraft Limited November 8, 1976 Reissued to Helio Inc. August 10, 1984 Reissued to Helio Aircraft, Inc. August 23, 1984 Reissued to Helio Enterprises, Inc. August 11, 1994 Reissued to Alliance Aircraft Group, LLC September 18, 1997 Reissued to Alliance Aircraft Group, LLC dba Helio Aircraft Company April 10, 2001 Reissued to Helio Aircraft, LLC July 14, 2005 .....END..... ``` ## ADs (2, in force first) - [AD 2005-01-19](https://openairdocs.org/ad/2005-01-19): Mode S transponders · GARMIN International GTX 330D, GTX 330, GTX 33D and 830 more. Effective Feb 23, 2005 - [AD 79-07-02](https://openairdocs.org/ad/79-07-02): Batteries · Aircraft Parts & Development A, A-2, A-3 and 149 more. Effective Apr 3, 1979 ## Registered aircraft by registry model (OpenAirDocs) - [Helio HST-550A](https://openairdocs.org/model/helio-hst-550a): 2 aircraft (registry code 4301006) - [Helio HST-550](https://openairdocs.org/model/helio-hst-550): 1 aircraft (registry code 4301002) ## STCs approved under this data sheet (53, first 50) - [STC SA02571SE](https://openairdocs.org/stc/SA02571SE): Installation of Garmin G500/G600 TXi Integrated Avionics System (Primary Flight Display, Multi-Function Display, and Engine Indicating System Display).. Garmin International Inc. - [STC SA01800SE](https://openairdocs.org/stc/SA01800SE): Fabrication and installation of new or replacement of existing instrument panel lights dimmer control.. TCW Technologies, LLC - [STC SA01861SE](https://openairdocs.org/stc/SA01861SE): Fabrication and installation of Landing Light Controller. TCW Technologies, LLC - [STC SA02636SE](https://openairdocs.org/stc/SA02636SE): Installation of Garmin GPS 175 Navigation System and GNX 375 Navigation System with ADS-B In/Out Transponder.. Garmin International Inc. - [STC SA02019SE-D](https://openairdocs.org/stc/SA02019SE-D): Installation of Garmin Model GTN 625/635/650; 725/750 Navigation System. Garmin International Inc. - [STC SA02738CH](https://openairdocs.org/stc/SA02738CH): Installation of L-3 Communications Avionics Systems. Acron Aviation Inc. - [STC SA04046CH PAGE 1](https://openairdocs.org/stc/SA04046CH%20PAGE%201): Installation of L-3 GENESIS (TM) Electronic Standby Instrument System (ESI-500/MAG-500). Acron Aviation Inc. - [STC SA1481CE](https://openairdocs.org/stc/SA1481CE): Installation of Pratt & Whitney (UACL) PT6A-27 turboprop engine and Hartzell HC-B3TN-3D/T10178CH reversible propeller. Helio Alaska Inc. - [STC SA02658SE](https://openairdocs.org/stc/SA02658SE): Installation of Garmin GI 275 Multi-Function Display System. Garmin International Inc. - [STC SA02203AK](https://openairdocs.org/stc/SA02203AK): Installation of FlightLogic Synthetic Vision Electronic Flight Information System (EFIS-SV).. Genesys Aerosystems Inc. - [STC SA02444AK](https://openairdocs.org/stc/SA02444AK): Approval of the L-3 Communications NGT 9000/9000R ADS-B system installed. ADS-B Technologies LLC - [STC SA09902AC](https://openairdocs.org/stc/SA09902AC): Installation of BendixKing KFD 900 Flight Display System. Honeywell International Inc. (Bendix King) - [STC SA11174SC PAGE 1](https://openairdocs.org/stc/SA11174SC%20PAGE%201): Installation of BendixKing by Honeywell KSN 770 and KSN 765 WAAS LPV approach capable nav/comm systems. Honeywell International Inc (Bendix King) - [STC SA10822SC](https://openairdocs.org/stc/SA10822SC): Installation of EFD1000 Primary Flight Display. Aspen Avionics Inc. - [STC SA00401BO](https://openairdocs.org/stc/SA00401BO): Installation of a SkyTrax100B UAT receiver. Avidyne Corporation - [STC SA10236SC](https://openairdocs.org/stc/SA10236SC): Installation of a GDC 31 Roll Steering Converter. DAC International Inc - [STC SA01714WI](https://openairdocs.org/stc/SA01714WI): Installation of a Garmin transponders: (a) GTX 330/330D/33/33D with ADS-B Out functionality; (b) GTX 335/335R/345/345R with ADS-B Out and In functionality; or (c) GTX 335R/345R with ADS-B Out functionality in select airplanes installed with G950/G1000 systems.. Garmin International Inc - [STC SA04165NY](https://openairdocs.org/stc/SA04165NY): Installation of Latitude Technologies Skynode S200 Satcom system must be performed. Latitude Technologies Corporation - [STC SA02153LA-D PAGE 1](https://openairdocs.org/stc/SA02153LA-D%20PAGE%201): Installation of Garmin G600 Primary Flight Display (PFD) and Multifunction Display (MFD) System. Garmin International Inc. - [STC SA01933LA-D](https://openairdocs.org/stc/SA01933LA-D): Installation of Garmin Model 400W / 500W Series GPS-WAAS Navigation System. Garmin International Inc - [STC SA00382BO](https://openairdocs.org/stc/SA00382BO): Installation of Globalstar Antenna and Cradle provisions to support a Globalstar GPS-1700 in non-composite airplanes. Avidyne Corporation - [STC SA02428SE](https://openairdocs.org/stc/SA02428SE): Installation of an Air Stream Switch for an electric time recording device on non-pressurized aircraft. Henry F Rogers/David E Polley - [STC SA00343BO](https://openairdocs.org/stc/SA00343BO): Installation of a single configuration or a dual configuration Avidyne Corporation Integrated Flight Display, Model IFD540 loaded with Release 10.0 software (or later FAA approved release). Avidyne Corporation - [STC SA00352BO PAGE 1](https://openairdocs.org/stc/SA00352BO%20PAGE%201): Installation of an Avidyne Corporation Mode A/C/S Transponder with ADS-B Out capability, Model AXP340 loaded with Version 3.13 software (or later FAA approved version),. Avidyne Corporation - [STC SA02119SE PAGE 1](https://openairdocs.org/stc/SA02119SE%20PAGE%201): Installation of Garmin GDL 88 ADS-B UAT Transceiver System. Garmin International Inc - [STC SA01229SE PAGE 1](https://openairdocs.org/stc/SA01229SE%20PAGE%201): Installation of GNS 480 (CNX80) GPS WAAS Navigator with integrated VHF Navigation and Communication radios. Garmin International Inc - [STC SA02442AK PAGE 1](https://openairdocs.org/stc/SA02442AK%20PAGE%201): Approval of the L-3 Communications NGT 2000/2500 ADS-B system. ADS-B Technologies, LLC - [STC SA01933LA-D PAGE 1](https://openairdocs.org/stc/SA01933LA-D%20PAGE%201): Installation of Garmin Model 400W / 500W Series GPS-WAAS Navigation System. Garmin International Inc - [STC SA02717NY PAGE 1](https://openairdocs.org/stc/SA02717NY%20PAGE%201): Installation of VoiceFlight Systems LLC VFS101 Speech Recognition Module. VoiceFlight Systems LLC - [STC SA02015SE-D](https://openairdocs.org/stc/SA02015SE-D): Installation of Garmin G500 Primary Flight Display (PFD) and Multifunction Display (MFD) System.. Garmin International Inc - [STC SA01692SE](https://openairdocs.org/stc/SA01692SE): Installation of a Garmin GMX 200 Multi-Function Display. Garmin International Inc - [STC SA03148NY](https://openairdocs.org/stc/SA03148NY): The installation of the Latitude Technologies Corporation S100 Tracking System. Latitude Technologies Corporation - [STC SA02016SE-D](https://openairdocs.org/stc/SA02016SE-D): Installation of Garmin GTS 800, GTS 820 or GTS 850 Traffic System. Garmin International Inc - [STC SA5156NM](https://openairdocs.org/stc/SA5156NM): Fabrication and installation of Pulsar-MOSFET Landing Light Flasher System. AvTek - [STC SA01487SE-D](https://openairdocs.org/stc/SA01487SE-D): Installation of a GDL 69 or GDL 69A XM Satellite Receiver. Garmin International Inc - [STC SA00243BO](https://openairdocs.org/stc/SA00243BO): Installation of Centurion Consulting, Inc. GPS Steering Assist Module (SAM) with roll steering (p/n 0025-5100), or without roll steering (p/n 0025-5200).. Icarus Avionics, LLC - [STC SA02293AK](https://openairdocs.org/stc/SA02293AK): Installation of FlightLogic Synthetic Vision Electronic Flight Information System (EFIS-SV).. Chelton Flight Systems Inc. - [STC SA01473SE](https://openairdocs.org/stc/SA01473SE): Installation of a GTX 32 (mode C), GTX 33 (mode S), or GTX 33D (mode S with diversity) Remote Transponde. Garmin AT Inc. - [STC SA4005NM](https://openairdocs.org/stc/SA4005NM): Precise Flight Inc. Pulselite Control System. Precise Flight Inc - [STC SA01695SE](https://openairdocs.org/stc/SA01695SE): Installation of an antenna. Garmin AT Inc. - [STC SA01487SE](https://openairdocs.org/stc/SA01487SE): Installation of a GDL 69 or GDL 69A XM Satellite Receiver in accordance with Garmin Supplemental Type Certificate Master Data List, P/N 005-C0217-00, Revision A, dated December 20, 2004, or later FAA approved revision.. Garmin AT Inc. - [STC SA02154AK](https://openairdocs.org/stc/SA02154AK): Installation of the UPS Aviation Technologies Inc. Apollo MX20 multi-function display, P/N 430-0270-500.. Garmin AT Inc. - [STC SA02217AK](https://openairdocs.org/stc/SA02217AK): Installation of Garmin AT Model GDL90 UAT Data Link System, in accordance with Garmin AT, Inc., GDL 90 UAT Master Data List, P/N 560-0278-01, Revision A, dated November 12, 2004, or later FAA approved revision.. Garmin AT Inc. - [STC SA02644AT](https://openairdocs.org/stc/SA02644AT): Installation of modified fuel system. Limited to installation on model HST-550, serial number 001 ONLY.. Mojoe LLC - [STC SA5927NM](https://openairdocs.org/stc/SA5927NM): Replace United Aircraft of Canada model PT6A-27 engine with model PT6A-34.. Helio Enterprises Inc - [STC SA2325SO](https://openairdocs.org/stc/SA2325SO): Installation of a P&W PT6A-34 engine, derated to PT6A-27 power ratings.. AirTec Aircraft Services - [STC SA808SW](https://openairdocs.org/stc/SA808SW): Installation of Mitchell Model AK246 omni-tracker. Applicable only to aircraft modified by STC SA615SW.. Century Flight Systems Inc - [STC SA1418SO](https://openairdocs.org/stc/SA1418SO): Replacement of rotor vanes in Airborne 211CC and 212CW vacuum pumps. (See limitations). Aircraft Products Supply Co Inc - [STC SA02019SE-D PAGE 2](https://openairdocs.org/stc/SA02019SE-D%20PAGE%202) (historical): Installation of Garmin GTN 6XX/7XX Navigation System. Garmin International Inc - [STC SA02153LA-D](https://openairdocs.org/stc/SA02153LA-D) (historical): Installation of Garmin G600 Primary Flight Display (PFD) and Multifunction Display (MFD) System. Garmin International Inc All 53: https://openairdocs.org/tcds/A4EA/stcs.md --- 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.