# Learjet 23 - Type: Aircraft model (FAA registry) - Registry code: 5170102 - Manufacturer (registry): LEARJET INC - Model: 23 - Aircraft type: Fixed wing multi engine - Category: Airplane - Engines: 2 · Turbo-jet - Seats: 8 - Weight class: 12,500 to 19,999 lb - Cruise speed: 315 mph - Certification: Type certificated - Data sheet: [TCDS A5CE](https://openairdocs.org/tcds/A5CE) (OpenAirDocs) - Holder: Learjet Inc. - Registered aircraft: 6 - Page: https://openairdocs.org/model/learjet-23 Model codes come from the FAA registry's reference file. ADs are matched to them by model name and maker. ## ADs that may apply (OpenAirDocs) Matched to this model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment. - [AD 2007-04-18](https://openairdocs.org/ad/2007-04-18): Left- and right-hand standby fuel pump switches · Learjet 23, 24, 24A and 25 more. Effective Mar 23, 2007 - [AD 2005-23-06](https://openairdocs.org/ad/2005-23-06): Thrust reverser hydraulic system · Engine thrust reversers (NORDAM Group STC SA1669SW or 2 others). Effective Dec 19, 2005 - [AD 2005-23-03](https://openairdocs.org/ad/2005-23-03): Spherical accumulator for the main hydraulic system · Learjet 23, 24, 24A and 14 more. Effective Dec 19, 2005 - [AD 2005-16-09](https://openairdocs.org/ad/2005-16-09): Flappers. · Learjet 23, 24, 25 and 2 more. Effective Sep 13, 2005 - [AD 2005-13-36](https://openairdocs.org/ad/2005-13-36): Center ball of the aileron control cable · Learjet 23, 24, 24A and 21 more. Effective Aug 9, 2005 - [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 2001-07-11](https://openairdocs.org/ad/2001-07-11): Main Landing Gear Tires · Learjet 23, 24, 24A and 25 more. Effective May 1, 2001 - [AD 99-16-03](https://openairdocs.org/ad/99-16-03): Horizontal Stabilizer Anti-Ice System · Learjet 23, 24, 24A and 22 more. Effective Sep 7, 1999 - [AD 92-19-12](https://openairdocs.org/ad/92-19-12): Oxygen Plumbing & Map Light Wires · Learjet 23, 24, 24A and 22 more. Effective Nov 17, 1992 - [AD 86-05-05 R1](https://openairdocs.org/ad/86-05-05-R1): Battery Vent System · Learjet 23, 24, 24A and 20 more. Effective Jan 19, 1988 - [AD 86-22-05](https://openairdocs.org/ad/86-22-05): Flap Sector Mounting Brackets Inspection · Learjet 23, 24, 24A and 23 more. Effective Nov 10, 1986 - [AD 82-01-05 R2](https://openairdocs.org/ad/82-01-05-R2): Stall Warning Accelerometer Unit · Learjet 23, 24, 24A and 16 more. Effective Apr 10, 1986 - [AD 80-19-11 R1](https://openairdocs.org/ad/80-19-11-R1): Automatic Flight Control and Stall Warning Systems · Learjet 23, 24, 24A and 20 more. Effective May 20, 1985 - [AD 81-13-07](https://openairdocs.org/ad/81-13-07): Change to AFM Fuel Starvation · Learjet 23, 24, 24A and 20 more. Effective Jun 25, 1981 - [AD 80-26-02](https://openairdocs.org/ad/80-26-02): AFCS/AFC-SS Pitch Function · Learjet 23, 24, 24A and 16 more. Effective Jan 15, 1981 - [AD 80-19-09 R1](https://openairdocs.org/ad/80-19-09-R1): Jet Pumps · Learjet 23, 24, 24A and 20 more. Effective Dec 11, 1980 - [AD 80-07-09](https://openairdocs.org/ad/80-07-09): Cabin Main Entrance Upper Door · Learjet 23, 24, 24A and 20 more. Effective May 1, 1980 - [AD 78-20-12](https://openairdocs.org/ad/78-20-12): Aircraft Tires · Cessna 336, 337, T337B and 15 more. Effective Oct 5, 1978 - [AD 78-16-03](https://openairdocs.org/ad/78-16-03): Refrigeration Condenser Fan · Learjet 23, 24, 24A and 18 more. Effective Aug 17, 1978 - [AD 77-19-02](https://openairdocs.org/ad/77-19-02): Cabin Door Locking Mechanism · Learjet 23, 24, 24A and 14 more. Effective Jul 20, 1978 - [AD 75-15-06](https://openairdocs.org/ad/75-15-06): Landing Gear Struts · Learjet 23, 24, 24A and 14 more. Effective Jul 25, 1975 - [AD 74-23-01](https://openairdocs.org/ad/74-23-01): External Power Receptacle · Learjet 23 and 24. Effective Nov 5, 1974 - [AD 72-05-01](https://openairdocs.org/ad/72-05-01): Flap Actuator Rod End · Learjet 23. Effective Feb 29, 1972 - [AD 71-16-04](https://openairdocs.org/ad/71-16-04): Battery Change or Modification of Comb · Learjet 23, 24 and 25. Effective Aug 3, 1971 - [AD 69-15-06](https://openairdocs.org/ad/69-15-06): Engine Throttle Cable · Learjet 23, 24 and 25. Effective Aug 15, 1969 - [AD 66-14-02](https://openairdocs.org/ad/66-14-02): Windshield Deicing Systems · Learjet 23 and 24. Effective Jun 1, 1966 - [AD 66-13-04](https://openairdocs.org/ad/66-13-04): Pressure Control Static Air System · Learjet 23 and 24. Effective May 17, 1966 - [AD 65-26-03](https://openairdocs.org/ad/65-26-03): Baggage Compartment · Learjet 23 - [AD 65-26-02](https://openairdocs.org/ad/65-26-02): Control Column Covers · Learjet 23 Historical (superseded or no longer in force): - [AD 95-25-03](https://openairdocs.org/ad/95-25-03) (historical): Deterioration of Flapper Valves of Tip Tank · Learjet 23, 24, 25 and 2 more. Effective Dec 27, 1995 ## Information bulletins (advisory) (2) - [SAIB 2026-07](https://openairdocs.org/saib/2026-07): MAIN LANDING GEAR ATTACH SECTION, Trunnion Pins. Issued Mar 19, 2026 - [SAIB NM-13-38](https://openairdocs.org/saib/NM-13-38): Flight Controls Control Column Section. Issued Jun 24, 2013 ## Registered aircraft (6) - [N119BA](https://openairdocs.org/aircraft/N119BA): [Tucson, AZ](https://openairdocs.org/faa-place/AZ/Tucson), built 1965, S/N 23-084, Registration pending - [N200Y](https://openairdocs.org/aircraft/N200Y): [Classic Lear Jet Foundation](https://openairdocs.org/faa-owner/CLASSIC%20LEAR%20JET%20FOUNDATION), [Wichita, KS](https://openairdocs.org/faa-place/KS/Wichita), S/N 23-003 - [N23BY](https://openairdocs.org/aircraft/N23BY): [Younkin Matthew A](https://openairdocs.org/faa-owner/YOUNKIN%20MATTHEW%20A), [Siloam Springs, AR](https://openairdocs.org/faa-place/AR/Siloam%20Springs), built 1965, S/N 23-009 - [N477K](https://openairdocs.org/aircraft/N477K): built 1965, S/N 23036 - [N73CE](https://openairdocs.org/aircraft/N73CE): [Yanks Air Museum](https://openairdocs.org/faa-owner/YANKS%20AIR%20MUSEUM), [Baldwin Park, CA](https://openairdocs.org/faa-place/CA/Baldwin%20Park), built 1965, S/N 23068 - [N823LJ](https://openairdocs.org/aircraft/N823LJ): [Artemis Aviation Group LLC](https://openairdocs.org/faa-owner/ARTEMIS%20AVIATION%20GROUP%20LLC), [Kalispell, MT](https://openairdocs.org/faa-place/MT/Kalispell), S/N 23-082A ## NTSB investigations (25) From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [NTSB LAX98LA105](https://openairdocs.org/ntsb/LAX98LA105), Mar 4, 1998: Learjet 23 (N37BL), Oakdale, CA, substantial damage. Probable cause: failure of the flight crew to extend the landing gear before landing. - [NTSB CHI95LA013](https://openairdocs.org/ntsb/CHI95LA013), Oct 14, 1994: Learjet 23 (N20TA), Holland, MI, substantial damage. Probable cause: THE COPILOT'S MISJUDGMENT OF THE TOUCHDOWN POINT, AND THE PILOT IN COMMAND'S INADEQUATE SUPERVISION TO AVOID THE ACCIDENT. - [NTSB CHI91MA224](https://openairdocs.org/ntsb/CHI91MA224), Jul 23, 1991: Learjet 23 (N959SC), Detroit, MI, destroyed, 3 fatal. Probable cause: IMPROPER PREFLIGHT BY THE PILOT, HIS FAILURE TO ABORT THE TAKEOFF WHILE THERE WAS SUFFICIENT RUNWAY REMAINING, AND HIS FAILURE TO ASSURE THAT THE AIRCRAFT ATTAINED SUFFICIENT AIRSPEED FOR LIFT-OFF… - [NTSB ATL91LA122](https://openairdocs.org/ntsb/ATL91LA122), Jul 2, 1991: Learjet 23 (N500FM), Columbia, TN, substantial damage. Probable cause: THE PILOT'S PREMATURE DECISION TO TURN OFF THE ANTI-SKID DURING LANDING ROLL. FACTORS TO THIS ACCIDENT WERE HYDROPLANING CONDITIONS. - [NTSB ATL90MA051](https://openairdocs.org/ntsb/ATL90MA051), Jan 18, 1990: Learjet 23 (N331DP), Ansonia, OH, destroyed, 2 fatal. Probable cause: THE FLIGHT CREW BECAME INCAPACITATED FOR UNDETERMINED REASONS AND LOST CONTROL OF THE AIRPLANE. - [NTSB LAX88FA274](https://openairdocs.org/ntsb/LAX88FA274), Jul 30, 1988: Learjet 23 (N745F), Perris, CA, destroyed, 2 fatal. Probable cause: THE PILOT DECIDED TO CONDUCT HIS FLIGHT WITH KNOWN AIRCRAFT DEFICIENCIES. INDUCED COMPANY PRESSURE TO DELIVER THE AIRCRAFT TO ITS DESTINATION IS CONSIDERED TO HAVE BEEN A FACTOR IN THE ACCIDENT. - [NTSB CHI85FA344](https://openairdocs.org/ntsb/CHI85FA344), Aug 13, 1985: Learjet 23 (N61TS), Madison, WI, substantial damage - [NTSB DCA80AA017](https://openairdocs.org/ntsb/DCA80AA017), May 6, 1980: Lear Jet 23 (N866JS), Richmond, VA, destroyed, 2 fatal - [NTSB LAX78FA040](https://openairdocs.org/ntsb/LAX78FA040), Mar 30, 1978: Lear 23 (N133W), Burbank, CA, destroyed - [NTSB CHI77FA022](https://openairdocs.org/ntsb/CHI77FA022), Jan 6, 1977: Lear Jet 23 (N332PC), Flint, MI, destroyed, 2 fatal - [NTSB LAX73FUM21](https://openairdocs.org/ntsb/LAX73FUM21), Mar 8, 1973: Lear Jet 23 (N332PC), Carlsbad, CA, substantial damage - [NTSB CHI73AC058](https://openairdocs.org/ntsb/CHI73AC058), Dec 15, 1972: Lear 23 (N20M), Romulus, MI, destroyed, 2 fatal - [NTSB DCA70AZ008](https://openairdocs.org/ntsb/DCA70AZ008), May 9, 1970: Lear Jet 23A (N434EJ), Pellston, MI, destroyed, 6 fatal - [NTSB CHI70A0027](https://openairdocs.org/ntsb/CHI70A0027), Nov 6, 1969: Lear Jet 23A (N1021B), Racine, WI, destroyed, 7 fatal - [NTSB CHI68A0051](https://openairdocs.org/ntsb/CHI68A0051), Dec 9, 1967: Lear Jet 23 (N822LJ), Detroit, MI, destroyed - [NTSB CHI68A0039](https://openairdocs.org/ntsb/CHI68A0039), Oct 25, 1967: Lear Jet 23 (N432EJ), Muskegon, MI, destroyed - [NTSB DEN67A0066](https://openairdocs.org/ntsb/DEN67A0066), Apr 23, 1967: Lear 23 (N434EJ), Spanish Fork, UT, substantial damage - [NTSB MIA67D0099](https://openairdocs.org/ntsb/MIA67D0099), Jul 29, 1966: Lear Jet 23 (N332PC), Manteo, NC, substantial damage - [NTSB FTW66I0115](https://openairdocs.org/ntsb/FTW66I0115), Jun 15, 1966: Lear Jet (N802L), Enid, OK, incident, substantial damage - [NTSB FTW66I0115](https://openairdocs.org/ntsb/FTW66I0115), Jun 15, 1966: Lear Jet 23 (N802L), Enid, OK, incident, substantial damage - [NTSB FTW66A0095](https://openairdocs.org/ntsb/FTW66A0095), Apr 23, 1966: Lear Jet 23 (N235R), Clarendon, TX, destroyed, 2 fatal - [NTSB FTW66D0611](https://openairdocs.org/ntsb/FTW66D0611), Apr 4, 1966: Lear 23 (N332PC), Marfa, TX, substantial damage - [NTSB MKC65A0076](https://openairdocs.org/ntsb/MKC65A0076), Jun 14, 1965: Learjet 23 (N802L), Wichita, KS, substantial damage - [NTSB UNK64X2114](https://openairdocs.org/ntsb/UNK64X2114), Jun 4, 1964: Lear M23 (N801L), Wichita, KS, destroyed - [NTSB UNK64X1054](https://openairdocs.org/ntsb/UNK64X1054), Mar 27, 1964: Lear Jet 23 (N802L), Wichita, KS, substantial damage ## FAA accident and incident reports (29) From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [Accident 19980304002559A](https://openairdocs.org/incident/19980304002559A), Mar 4, 1998: Lear 23LEAR (N37BL), Oakdale, CA, Substantial damage. Student and CFI failed to extend the landing gear. Landed gear up. (.4)the pilot stated in his accident report that there was no crew action to extend the… - [Incident 19950517015009I](https://openairdocs.org/incident/19950517015009I), May 17, 1995: Lear 23LEAR (N154AG), Decatur, IL. Narrative: a mechanical reliability report will be submitted to the chdo as required by FAR 135.415 (a)(6). During a repositioning flight from sus to ord on… - [Accident 19941014038049A](https://openairdocs.org/incident/19941014038049A), Oct 14, 1994: Lear 23LEAR (N20TA), Holland, MI, Substantial damage. SIC landed short in a yaw. Damaged left main gear. Pilot flew back home base. Left main collapsed landing. - [Incident 19940715032859I](https://openairdocs.org/incident/19940715032859I), Jul 15, 1994: Lear 23LEAR (N351N), Salt Lake City, UT, Minor damage. Left main gear failed to extend by any means taken. Landed with gear up. Damaged wing and wing tank. - [Accident 19910722029029A](https://openairdocs.org/incident/19910722029029A), Jul 22, 1991: Lear 23LEAR (N959SC), Detroit, MI, Destroyed, 3 fatal. Over gross and parking brake not fully released. Used all runway. Lifted nose high. Hit trees. Needed longer runway - [Accident 19910702026029A](https://openairdocs.org/incident/19910702026029A), Jul 2, 1991: Lear 23LEAR (N500FM), Columbia/Mt Ple, TN, Substantial damage. Overran wet runway on landing roll. No mechanical. Hydroplaning possible. - [Incident 19900121005899I](https://openairdocs.org/incident/19900121005899I), Jan 21, 1990: Lear 23LEAR (N20EP), Albuquerque, NM. Left engine fire warning light on. Engine secured. Landed safely. Appears fire warning system had malfunctioned. - [Accident 19900118000659A](https://openairdocs.org/incident/19900118000659A), Jan 18, 1990: Lear 23LEAR (N331DP), Ansonia, OH, Destroyed, 2 fatal. Crashed and burned. ATC reported pilots speech slurred. Read back on vector headings incorrect according to ATC. - [Incident 19880909052099I](https://openairdocs.org/incident/19880909052099I), Sep 9, 1988: Lear 23LEAR (N77VJ), Charleston, WV, Minor damage. Brakes locked during rollout. Smoke and fire from brakes. Parking brake valve was sticking in on position. - [Accident 19880730028329A](https://openairdocs.org/incident/19880730028329A), Jul 30, 1988: Lear 23LEAR (N745F), Riverside, CA, Destroyed, 2 fatal. Had uneven fuel flow and imbalance. Diverted to nearest airport, crashed and burned. Yaw damper inop. - [Incident 19870112027759I](https://openairdocs.org/incident/19870112027759I), Jan 12, 1987: Lear 23LEAR (N806LJ), St Louis, MO. Emergency landing after smoke in cockpit. Found overheated DME unit. - [Incident 19861125068399I](https://openairdocs.org/incident/19861125068399I), Nov 25, 1986: Lear 23LEAR (N1963A), Atlanta, GA, Minor damage. Aircraft dragged wingtip tank on landing. Weather was reported below minimums at the time. - [Incident 19851207068889I](https://openairdocs.org/incident/19851207068889I), Dec 7, 1985: Lear 23LEAR (N806LJ), Detroit, MI, Minor damage. Departed side of runway after attempting to correct veer with nose wheel steering. No mechanical failures. - [Incident 19851017059439I](https://openairdocs.org/incident/19851017059439I), Oct 17, 1985: Lear 23LEAR (N122M), St Louis, MO. Brakes failed on rollout. Pilot forgot to use emergency brake system. Plane stopped 500 feet beyond runway end. - [Accident 19850813056319A](https://openairdocs.org/incident/19850813056319A), Aug 13, 1985: Lear 23LEAR (N61TS), Madison, WI, Substantial damage. Aborted takeoff after noise in cockpit. Ran off runway end, struck berm and ditch. Flat spot on one main tire. - [Incident 19820122000789I](https://openairdocs.org/incident/19820122000789I), Jan 22, 1982: Lear 23LEAR (N500FM), Ypsilanti, MI, Minor damage. Aircraft ran off icy runway aftr landing. Pilot not notified of braking action. Company to require pilot be told. - [Incident 19811202086469I](https://openairdocs.org/incident/19811202086469I), Dec 2, 1981: Lear 23LEAR (N101DB), Washington, DC. Engine flamed out, was restarted and visually inspected after landing. Engine flamed out again on takeoff. - [Incident 19810414031489I](https://openairdocs.org/incident/19810414031489I), Apr 14, 1981: Lear 23LEAR (N99TC), Chicago, IL. Jet blast blew C310 N69676 parked on slope, unchocked, brades not set, into fuel truck during ramp taxi. - [Incident 19800524054009I](https://openairdocs.org/incident/19800524054009I), May 24, 1980: Lear 23LEAR (N140RC), Lake Havasu, AZ. Right tip tank scraped runway on touchdown. - [Accident 19800506011639A](https://openairdocs.org/incident/19800506011639A), May 6, 1980: Lear 23LEAR (N866JS), Richmond, VA, Destroyed. Improper level-off, low speed, nose high. Started wing roll, stall & roll-over. Crashed inverted. Pilot fatigue. - [Incident 19800417044659I](https://openairdocs.org/incident/19800417044659I), Apr 17, 1980: Lear 23LEAR (N866JS), St Louis, MO, Minor damage. Ac electrical system failed, landing was made without further difficulty. - [Incident 19800130020259I](https://openairdocs.org/incident/19800130020259I), Jan 30, 1980: Lear 35A (N11QM), Chicago, IL, Minor damage. Pilot turned onto a service road by mistake. Tip tank punctured by steel stop sign post. - [Incident 19791126046199I](https://openairdocs.org/incident/19791126046199I), Nov 26, 1979: Lear 23LEAR (N7200K), Albany, NY. On final, pilot noticed low hydraulic pressure. Found loose "b" nut on nose gear actuator line causing leak. - [Incident 19790404013509I](https://openairdocs.org/incident/19790404013509I), Apr 4, 1979: Lear 23LEAR (N31CK), Vandalia, OH. Primary nose wheel steering system failed. Secondary system not activated in time to avoid going off the runway. - [Incident 19790305008959I](https://openairdocs.org/incident/19790305008959I), Mar 5, 1979: Lear 23LEAR (N500BF), Chicago, IL, Minor damage. During crosswind landing tip tank contacted ground after ice broke off opposite wing. - [Incident 19781025028219I](https://openairdocs.org/incident/19781025028219I), Oct 25, 1978: Lear 23LEAR (N3ZA), St Louis, MO, Substantial damage. Pilot unable to start second engine tried to do it on a fast taxi run down the runway. Lost control. - [Accident 19780330024829A](https://openairdocs.org/incident/19780330024829A), Mar 30, 1978: Lear 23LEAR (N133W), Burbank, CA, Destroyed. Left outboard anti-skd valve inop. Plt didnt deploy spoilers. Prpty-arpt fencing. - [Accident 19770106038479A](https://openairdocs.org/incident/19770106038479A), Jan 6, 1977: Lear 23LEAR (N332PC), Flint, MI, Destroyed. Plt had lmtd recent jet experience. Vectored,clrd for ILS back cus 3NM se of middle marker. - [Accident 19730308005129A](https://openairdocs.org/incident/19730308005129A), Mar 8, 1973: Lear 23LEAR (N332PC), Carlsbad, CA, Substantial damage. Lnd in known adverse rwy cond. Ran off rwy into mud. ## Service difficulty reports (7) As reported by operators and repair stations, by the model named in the report. - [SDR 2023FA0000798](https://openairdocs.org/sdr/2023FA0000798), Nov 29, 2023: CONTROL TUBE. SHEARED. AIRCRAFT WAS IN DECENT, WHEN PILOT INPUTTED 1/4 TO 1/2 INCH MOVEMENT OF THE CONTROL WHEEL, CONTROLS BECAME LIGHT FOLLOWED BY THE AIRCRAFT SHAKING VIOLENTLY. THE - [SDR 2011FA0000706](https://openairdocs.org/sdr/2011FA0000706), Oct 26, 2011: STRUCTURE. MISINSTALLED. ON 1/2011 DURING A WALK AROUND PRIOR TO AN ANNUAL INSPECTION THE RT WING LE WAS FOUND LOOSE. INSPECTION OF THIS AREA DISCLOSED THAT THE LE WAS MISINSTALLED. THE - [SDR 2005FA0001228](https://openairdocs.org/sdr/2005FA0001228), Aug 29, 2005: CONTROL CABLE. FRACTURED. THE PILOT LOST ENGINE POWER DURING TAKEOFF. EXAM FOUND MIXTURE CONTROL CABLE FRACTURED AT 90-DEGREE ANGLE NEAR SET SCREW TO CARBURETOR. FATIGUE ON CABLE INDICAT - [SDR 99ZZZX1566](https://openairdocs.org/sdr/99ZZZX1566), Mar 25, 1999: RUDDER ASSY. OUT OF ADJUST. RUDDER SKIN BINDING AGAINST VERTICAL STABILIZER SKIN DURING FULL DEFLECTION. - [SDR 97ZZZX3743](https://openairdocs.org/sdr/97ZZZX3743), Aug 11, 1997: DUCT. COLLAPSED. ENGINE LOST RPM AND STOPPED. INSPECTION REVEALED AIR INTAKE DUCT COLLAPSED BETWEEN CARB AIRBOX AND CARB. INCORRECT TYPE AND PART NUMBER DUCT INSTALLED PREVIOUSL - [SDR 97ZZZX1128](https://openairdocs.org/sdr/97ZZZX1128), Feb 26, 1997: GROUND WIRE. BURNED. THIS GROUND WIRE GROUNDS THE STARTER/VIBRATOR CIRCUIT. IT WAS GROUNDED VIA A COPPER CLAMP TO THE MAG. P-LEAD SHIELDING. THE P-LEAD SHIELDING WAS GROUNDED ONLY A - [SDR 96ZZZX597](https://openairdocs.org/sdr/96ZZZX597), Jan 15, 1996: GENERATOR. BRUSHES FAILED. GENERATOR WENT 'OFF LINE'. DISASSEMBLY FOUND BRUSH LEADS CUT AND FRAYED BY BRUSH HOLDERS. REAR BEARING FOUND LOOSE IN REAR HOUSING CAUSING ROTATIONAL VIBRATION ## STCs that may be installed (OpenAirDocs) (49) Approved for this model: the STC's model list names it on its data sheet, or a series that includes it. In force first, then newest. The registry doesn't record which STCs an aircraft has. - [STC ST03424CH](https://openairdocs.org/stc/ST03424CH): Certification of Automatic Dependent Surveillance - Broadcast (ADS-B) Out System with Rockwell Collins TDR-94/-94D Transponders. CMD Flight Solutions LLC - [STC SA02658SE](https://openairdocs.org/stc/SA02658SE): Installation of Garmin GI 275 Multi-Function Display System. Garmin International Inc - [STC SA09856AC](https://openairdocs.org/stc/SA09856AC): Installation of BendixKing Aerowave 100 In-flight Data Link System for non-essential, non-required aircraft Cabin Systems & Equipments. Honeywell International Inc (Bendix King) - [STC ST01930LA](https://openairdocs.org/stc/ST01930LA): Installation of Sandel Avionics SN4500 Electronic Horizontal Situation Indicator (EHSI). Sandel Avionics LLC - [STC SA02075SE](https://openairdocs.org/stc/SA02075SE): Installation of a Mid-Continent MD835( ) Lithium Ion Battery. Mid-Continent Instrument Co. Inc - [STC SA04514NY](https://openairdocs.org/stc/SA04514NY): Single/Dual Transponder System ADS-B Upgrade. Scandinavian Avionics Design ApS - [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 SA1731SW](https://openairdocs.org/stc/SA1731SW): Installation of engine thrust reversers. The NORDAM Group LLC - [STC ST10472SC](https://openairdocs.org/stc/ST10472SC): Replacement Thrust Reverser Accumulator for the TR3000 Thrust Reverser System. The NORDAM Group LLC - [STC SA04165NY](https://openairdocs.org/stc/SA04165NY): Installation of Latitude Technologies Skynode S200 Satcom system must be performed. Latitude Technologies Corporation - [STC SA01933LA-D](https://openairdocs.org/stc/SA01933LA-D): Installation of Garmin Model 400W / 500W Series GPS-WAAS Navigation System. Garmin International Inc - [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 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 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 SA00269BO](https://openairdocs.org/stc/SA00269BO): Installation of Avidyne Corporation TWX 670 Tactical Weather Detection System P/N 850-00026-000-( ) consisting of Avidyne Processor P/N 700-00033-000-( ), Sensor Systems Inc. Antenna P/N S72-1715-1 with doubler plate P/N S72-171530-1, and Avidyne Mounting Tray P/N 700-00034-000. Avidyne Corporation - [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 SA01487SE-D](https://openairdocs.org/stc/SA01487SE-D): Installation of a GDL 69 or GDL 69A XM Satellite Receiver. Garmin International Inc - [STC SA00281BO](https://openairdocs.org/stc/SA00281BO): Installation of Avidyne Corporation MLX770 MultiLink Broadcast Transceiver P/N 700-00163-( ), Sensor Systems Inc. Antenna P/N S67-1575-109, or equivalent, and optional Avidyne Mounting Tray P/N 700-00165-000. Avidyne Corporation - [STC ST00462LA](https://openairdocs.org/stc/ST00462LA): Modification of the engine exhaust system. Rooke Corporation dba Aviation Equipment - [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 SA996EA](https://openairdocs.org/stc/SA996EA): Installation of Shaw Aero fuel filler cap P/Ns 457-2, -266, -370, 431, -9R, -125, -1251. Parker Hannifin Fluid Systems Division - [STC SA00290BO](https://openairdocs.org/stc/SA00290BO): Installation of Avidyne Corporation Part Number 700-00167-XXX Multi-Function Display and Mounting Tray Assembly Part Number 700-00168-XXX. Avidyne Corporation - [STC ST02540AT-D](https://openairdocs.org/stc/ST02540AT-D): Installation of replacement fuel tank sealant system. FFC Manufacturing - [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 SA30GL](https://openairdocs.org/stc/SA30GL): Installation of electronic engine synchronizer system. Ontic Engineering and Manufacturing Inc - [STC SA412CE](https://openairdocs.org/stc/SA412CE): Installation of Woodward Electronic Engine synchronizer system. Ontic Engineering and Manufacturing Inc - [STC SA01695SE](https://openairdocs.org/stc/SA01695SE): Installation of an antenna. Garmin AT Inc - [STC SA01401WI](https://openairdocs.org/stc/SA01401WI): Installation of Rosemount Pitot/Static Probes, altimeters, and associated equipment. Avcon Industries 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 SA00161BO](https://openairdocs.org/stc/SA00161BO): Installation of Avidyne Corporation FlightMax 700-00007-( ) EX500 Multi-Function Display. Avidyne Corporation - [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 SA3342NM](https://openairdocs.org/stc/SA3342NM): Cockpit sun visor installation. Rosen Sunvisor Systems LLC - [STC SA00165BO](https://openairdocs.org/stc/SA00165BO): Installation of Avidyne Corporation Datalink Coupler, part number 700-00015-000 per Avidyne Corporation Master Document List, Document No. AVACP-006 dtd 1/2/93 or later FAA-approved revisions. Avidyne Corporation - [STC SA2992WE](https://openairdocs.org/stc/SA2992WE): Installation of logo lights on horizontal stabilizer lower surface. DeVore Aviation Corporation of America, a New Mexico Corporation - [STC SA2304SW](https://openairdocs.org/stc/SA2304SW): Replacement of plunger type landing gear squat switch with rotary type switch. Sierra Industries, Inc - [STC SA2726SW](https://openairdocs.org/stc/SA2726SW): Installation of 6-pole rotary squat switches. Sierra Industries, Inc - [STC SA5656NM](https://openairdocs.org/stc/SA5656NM): Installation of burglar alarm system. Thompson Harold S - [STC SA2661SW](https://openairdocs.org/stc/SA2661SW): Installation of Ray Model 7507A battery monitoring system. Zee Company, Inc - [STC SA2657SW](https://openairdocs.org/stc/SA2657SW): Modification of air conditioner motor. Zee Systems, Inc - [STC SA639AL](https://openairdocs.org/stc/SA639AL): Installation of Model EP-110 starter/generator decoupler system on Models 23, 24, 25 airplanes using Bendix Model30B-37 starter generators. Jet Accessories Inc - [STC SA2861SW](https://openairdocs.org/stc/SA2861SW): Addition of Hydro seal fluid additive to nose and main gear shock struts. Granville Lasseter/dba Granville's Aircraft Strut Sealant - [STC SA175RM](https://openairdocs.org/stc/SA175RM): Replacement of throttle knob, Model EP-004, for 20 series Learjet equipped with Dee Howard thrust reversers. Jet Accessories Inc - [STC SA00281BO PAGE 2](https://openairdocs.org/stc/SA00281BO%20PAGE%202) (historical): Installation of Avidyne Corporation MLX770 MultiLink Broadcast Transceiver P/N 700-00163-( ), Sensor Systems Inc. Antenna P/N S67-1575-109, or equivalent, and optional Avidyne Mounting Tray P/N 700-00165-000. Avidyne Corporation - [STC SA01933LA](https://openairdocs.org/stc/SA01933LA) (historical): Installation of Garmin Model 400W / 500W Series GPS-WAAS Navigation System. Garmin AT Inc - [STC SA01229SE](https://openairdocs.org/stc/SA01229SE) (historical): Installation of CNX80 GPS WAAS Navigator with integrated VHF Navigation and Communication radios. UPS Aviation Technologies ## The same model under other registry codes Amateur-built copies and renamed makers get their own codes. - [Beech 23](https://openairdocs.org/model/beech-23): 147 registered aircraft, registry code 1151202 - [Curtiss-Wright 23](https://openairdocs.org/model/curtiss-wright-23): 0 registered aircraft, registry code 05621CM - [Consolidated 23](https://openairdocs.org/model/consolidated-23): 0 registered aircraft, registry code 242210A - [Nieuport 23](https://openairdocs.org/model/nieuport-23): 0 registered aircraft, registry code 6300120 --- 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.