# Gates Lear Jet 24B - Type: Aircraft model (FAA registry) - Registry code: 5170307 - Manufacturer (registry): GATES LEAR JET - Model: 24B - Aircraft type: Fixed wing multi engine - Category: Airplane - Engines: 2 · Turbo-jet - Seats: 8 - Weight class: 12,500 to 19,999 lb - Cruise speed: 363 mph - Certification: Type certificated - Data sheet: [TCDS A10CE](https://openairdocs.org/tcds/A10CE) (OpenAirDocs) - Holder: Learjet Inc. - Registered aircraft: 0 - Page: https://openairdocs.org/model/gates-lear-jet-24b 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 2005-13-36](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 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 95-20-03](https://openairdocs.org/ad/95-20-03): Airplane Flight Manual (AFM) - Altitude Limitations · Learjet 24, 24A, 24B and 24 more. Effective Nov 2, 1995 - [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 89-12-01](https://openairdocs.org/ad/89-12-01): Drag Chute Riser · Learjet 24, 24A, 24B and 22 more. Effective Jul 3, 1989 - [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 84-19-06](https://openairdocs.org/ad/84-19-06): Tab Control System · Learjet 24, 24A, 24B and 22 more. Effective Oct 22, 1984 - [AD 84-17-02](https://openairdocs.org/ad/84-17-02): Horizontal Stabilizer Trim Actuator · Learjet 24, 24A, 24B and 7 more. Effective Oct 5, 1984 - [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 79-12-05](https://openairdocs.org/ad/79-12-05): Stall Warning Systems · Learjet 24, 24A, 24B and 13 more. Effective Nov 6, 1979 - [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 ## 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 None registered with this model now. ## NTSB investigations None matched to aircraft with this model. ## FAA accident and incident reports (1) 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. - [Incident 20040319004679I](https://openairdocs.org/incident/20040319004679I), Mar 19, 2004: Lear 24B (N233TW), Grand Island, NE. (-23) On March 19, 2004, while on cruise from fort collins, CO, to columbus, in Learjet N233TW diverted to Grand islan, NE, after experiencing an unexplained… ## Service difficulty reports (23) As reported by operators and repair stations, by the model named in the report. - [SDR HAEA200400162](https://openairdocs.org/sdr/HAEA200400162), Aug 4, 2004: STRUT. DISCHARGED. NOSE GEAR FAILED TO FULLY RETRACT AFTER T/O FROM MKE. GEAR WAS EXTENDED, DETERMINED NO EMERGENCY EXISTED AND RETURNED FOR NORMAL LANDING. MAINTENANCE DETERMINED - [SDR 00104](https://openairdocs.org/sdr/00104), Aug 13, 2003: LINE. LEAKING. ON APPROACH, ATTEMPTED NORMAL GEAR EXTENSION BUT HYDRAULIC PRESSURE WAS TO LOW TO EXTEND THE GEAR. EXTENDED GEAR USING EMERGENCY GEAR PROCEDURE AND LANDED WITH - [SDR 000102](https://openairdocs.org/sdr/000102), Jul 31, 2003: SWITCH. MALFUNCTIONED. AIRCRAFT DEPARTED TUS BOTH MAIN GEAR RED LIGHTS STAYED ON, GEAR WAS RECYCLED LIGHTS STAYED ON DIVERTED TO ELP FOR MAINTENANCE. MAINTENANCE REPLACED SWITCH AND G - [SDR 00098](https://openairdocs.org/sdr/00098), Jun 11, 2003: ENGINE. FLAMED OUT. PILOT REPORTED RT ENGINE FLAMED-OUT CLIMBING THRU FL410 FOR FL430. DESCENDED AND RELIGHT NORMAL, CLIMB BACK TO FL410 FOR REMAINDER OF LEG. UPDATE AFTER MAINTENA - [SDR 00091](https://openairdocs.org/sdr/00091), May 15, 2003: ENGINE. FLAMED OUT. AIRCRAFT DEPARTED ADS DURING CLIMB TO FL430 RH ENGINE FLAMED OUT, ENGINE RELET AND AIRCRAFT LANDED AT LRD, DURING POST FLIGHT INSPECTION NO EVIDENCE OF FOD DAMA - [SDR 00073](https://openairdocs.org/sdr/00073), Jan 18, 2003: ENGINE. FLAMED OUT. PILOT REPORTED ENGINE FLAME OUT DURING CLIMB, AT FL400, DECEND AND NORMAL RESTART AT FL220, RETURN TO DEPARTURE AIRPORT FOR MAINTENANCE. WILL UPDATE REPORT AFTE - [SDR 00072](https://openairdocs.org/sdr/00072), Jan 18, 2003: ENGINE. FLAMED OUT. PILOT REPORTED ENGINE LT FLAMEOUT DURING CLIMB AT FL400. DESCENDED AND NORMAL RESTART AT FL220, RETURN TO DEPARTURE AIRPORT FOR MAINTENANCE. WILL UPDATE REPORT - [SDR 00066](https://openairdocs.org/sdr/00066), Dec 3, 2002: ENGINE. FLAMED OUT. PILOT REPORTED THE LT ENGINE FLAMED OUT CLIMBING FROM 41,800 TO 43,000. CENTER CLEARED THEM TO 24,000 FOR RELIGHT. AFTER RELIGHT, CLIMBED BACK TO 39,000. AFTER - [SDR 00057](https://openairdocs.org/sdr/00057), Oct 30, 2002: B-NUT. LOOSE. DURING TAKEOFF RUN, CREW RECEIVED A LOW OIL PRESSURE LIGHT ON THE LT ENGINE AND ABORTED TAKEOFF. AFTER CLEARING THE RUNWAY, INDICATION WAS NORMAL. SHORTLY AFTER - [SDR 00053](https://openairdocs.org/sdr/00053), Oct 18, 2002: ENGINE. FLAMED OUT. AIRCRAFT IN ROUTE FROM BRO TO ADS, AT FLT LVL 410 RT ENGINE FLAMED OUT, REQUEST LOWER TO PERFORM RESTART, NORMAL RESTART AND CLIMB TO 390, MAINTENANCE PERFORMED - [SDR HAEA00037](https://openairdocs.org/sdr/HAEA00037), Aug 11, 2002: ENGINE. DAMAGED. PILOT REPORTED NORMAL DEPARTURE FROM KSHV, DURING CLIMB RT ENGINE FIRE WARNING CAME ON AT 10,000FT. CREW SHUTDOWN ENGINE AND RETURNED TO KSHV FOR UNEVENTFUL LAN - [SDR SO12002F00000](https://openairdocs.org/sdr/SO12002F00000), Jul 1, 2002: FILTER. FAILED. FILTERS, LT AND RT ENGINE LOW FUEL PRESSURE LIGHT CAME ON DURING ENGINE POWER RUN. REPLACED LOW PRESSURE FUEL FILTERS AND REMOVED CUSTOMER FURNISHED FILTER FROM - [SDR 00027](https://openairdocs.org/sdr/00027), May 22, 2002: ENGINE. FLAMED OUT. AIRCRAFT EN ROUTE FROM MMV TO DKB RT ENGINE FLAME-OUT CLIMBING THROUGH FL410 TO 430, DESCENT TO FL250 PERFORMED AIR START ALL INDICATIONS NORMAL CONTINUED FLT. - [SDR 00025](https://openairdocs.org/sdr/00025), May 3, 2002: LIGHT. LOOSE. AIRCRAFT ON APPROACH TO ORH SELECTED GEAR DOWN, NO RT MAIN GREEN LIGHT, ALL OTHER INDICATIONS NORMAL. FLYBY THE TOWER, TOWER INDICATED GEAR APPEARED DOWN, NORMA - [SDR ESU2002F00000](https://openairdocs.org/sdr/ESU2002F00000), Dec 28, 2001: FUEL CONTROL. FAILED. AS THE AIRCRAFT WAS CLIMBING THROUGH FLIGHT 370. THE RIGHT ENGINE FLAMED OUT. THERE WAS NO FIRE AND NO EMERGENCY WAS DECLARED. THE PILOTS WENT THROUGH THE RELIG - [SDR 2002F00002](https://openairdocs.org/sdr/2002F00002), Dec 28, 2001: FCU. FAILED. ENGINE FLAME OUT DUE TO FUEL CONTROL FAILURE. - [SDR 99ZZZX2488](https://openairdocs.org/sdr/99ZZZX2488), Jun 24, 1999: VALVE. WRONG PART. WHILE TROUBLESHOOTING PILOT'S SIDE STATIC SYSTEM FOR LEAKS, FOUND THE ALTERNATE STATIC SOURCE CONTROL VALVE WAS NOT THE PROPER LEARJET VALVE. THE VALVE THAT WAS - [SDR CA980303003](https://openairdocs.org/sdr/CA980303003), Jan 28, 1998: THROTTLE CABLE. STIFF. (CAN) LEFT ENGINE POWER LEVER WAS DIFFICULT TO MOVE WHILE IN CRUISE. - [SDR 96ZZZX5034](https://openairdocs.org/sdr/96ZZZX5034), Sep 17, 1996: CONTROL CABLE. FRAYED. CABLE WAS INSTALLED TO AIRCRAFT. PRE-TENSIONED TO 200 FEET/POUNDS (PER MM) WHILE AILERON CONTROLS WERE RUN THROUGH WHILE CABLE WAS UNDER TENSION AT 200 POUNDS, - [SDR 96ZZZX3231](https://openairdocs.org/sdr/96ZZZX3231), May 29, 1996: O-RING. WORN. O-RING IN MAIN GEAR CONTROL VALVE FAILED CAUSING LOSS OF HYDRAULIC FLUID. FLIGHT CREW BLEW GEAR DOWN. NO DAMAGE TO AIRCRAFT OCCURRED. SUBMITTER STATED O-RING WI - [SDR 96ZZZX958](https://openairdocs.org/sdr/96ZZZX958), Feb 13, 1996: TIRE. BULGED. TIRE DEVELOPED A BULGE IN THE SIDEWALL AFTER A SHORT TIME IN SERVICE. - [SDR 96ZZZX957](https://openairdocs.org/sdr/96ZZZX957), Feb 13, 1996: TIRE. BULGED. TIRE DEVELOPED A BULGE IN SIDEWALL AFTER A SHORT TIME IN SERVICE. - [SDR 96ZZZX29](https://openairdocs.org/sdr/96ZZZX29), Dec 15, 1995: BATTERY. DESTROYED. DURING FLIGHT, AIRCRAFT LOST ELECTRICAL POWER FROM RIGHT BATTERY. MAINTENANCE DISCOVERED THE RIGHT BATTERY WAS DESTROYED BY THERMAL RUNAWAY. THE HEAT FROM THE R ## STCs that may be installed (OpenAirDocs) (69, first 50) 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 SA2622NM](https://openairdocs.org/stc/SA2622NM): Installation of Precise Flight Pulselite Control Unit in landing/taxi system. (767-200 B17) (DHC-8 101). Precise Flight Inc - [STC ST03885AT](https://openairdocs.org/stc/ST03885AT): Installation of an Avionica, Inc. avCM Cellular Module. Aircraft Systems and Manufacturing Inc - [STC ST12087CH](https://openairdocs.org/stc/ST12087CH): Installation replacement Cabin/Cockpit Handheld Fire Extinguishers. Avcon Industries Inc - [STC ST02097SE](https://openairdocs.org/stc/ST02097SE): Installation of replacement circuit boards for the FC-110 autopilot. Symetric Industries, DBA Extant Aerospace - [STC ST02416SE](https://openairdocs.org/stc/ST02416SE): Installation of the replacement rate gyro, Butler National Part Number 501-1169-01 MOD A or 501-1169-02 MOD A. Symetric Industries, DBA Extant Aerospace - [STC ST02417SE](https://openairdocs.org/stc/ST02417SE): Installation of the replacement stall warning vertical accelerometer, Butler National Part Number 02904001-101. Symetric Industries, DBA Extant Aerospace - [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 ST00738WI](https://openairdocs.org/stc/ST00738WI): Increased service life. Data required. Phoenix Air Group Inc - [STC ST01936WI](https://openairdocs.org/stc/ST01936WI): Installation of LED lights. AeroLED's Holdings LLC - [STC ST01138DE](https://openairdocs.org/stc/ST01138DE): Installation of MidContinent MD23 standby altimeter and/or attitude indicators. Butler National Corporation - [STC ST00814WI](https://openairdocs.org/stc/ST00814WI): Landing Gear Life Extension. Phoenix Air Group Inc - [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 ST00098IB](https://openairdocs.org/stc/ST00098IB): Introduction of ADS-B Out. STC Twenty One Limited - [STC ST02004WI](https://openairdocs.org/stc/ST02004WI): Installation of the Garmin GI-275 Instantaneous Vertical Speed Indicators (IVSI). Peregrine - [STC ST02230SE](https://openairdocs.org/stc/ST02230SE): The installation of dual Garmin GTX-33ES Mode-S transponders and single or dual Garmin GTN 650/750 panel mounted navigation and global positioning system (GPS) units, or dual Garmin GTX-335R and/or GTX-345R Mode-S transponders and single or dual Garmin GTN 650/750/625/725 panel mounted navigation and GPS units. Butler National Corporation - [STC ST01930LA](https://openairdocs.org/stc/ST01930LA): Installation of Sandel Avionics SN4500 Electronic Horizontal Situation Indicator (EHSI). Sandel Avionics LLC - [STC ST04177AT](https://openairdocs.org/stc/ST04177AT): Installation of a Talon Aerospace LED Replacement General Purpose Lamps. Aaxico Technical Services Inc - [STC ST02635LA](https://openairdocs.org/stc/ST02635LA): Modification to replace the existing Mode S Transponder system with the ACSS NXT-600 Mode S Transponder with ADS-B Out. Aviation Communication and Surveillance Systems (ACSS) LLC - [STC ST02681AT-D](https://openairdocs.org/stc/ST02681AT-D): Installation of Cockpit / Cabin Blower Assy. Summit Aviation Inc - [STC SA01452CH](https://openairdocs.org/stc/SA01452CH): Installation of an air ambulance conversion kit. Med-Pac Inc - [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 ST00835DE](https://openairdocs.org/stc/ST00835DE): Installation of Automatic Dependent Surveillance - Broadcast (ADS-B) Out and In functionality using the Garmin GTX 335R and GTX 345R Transponders plus qualified position sensor. Peregrine - [STC SA1670SW](https://openairdocs.org/stc/SA1670SW): 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 SA4999NM](https://openairdocs.org/stc/SA4999NM): Installation of lifeport patient loading and support system. LifePort LLC - [STC SA01213CH](https://openairdocs.org/stc/SA01213CH): Install air ambulance conversion in accordance with Spectrum Aeromed Inc. Drawings as listed on AML SA01213CH, or later FAA approved revision. Spectrum Aeromed LLC dba Spectrum Aeromed - [STC SA1639GL](https://openairdocs.org/stc/SA1639GL): Install air ambulance conversion. Spectrum Aeromed LLC dba Spectrum Aeromed - [STC ST11071SC](https://openairdocs.org/stc/ST11071SC): Demonstration of aircraft critical equipment and antenna systems tolerance of radio frequency interference (RFI) from intentional or spurious transmissions from certain Portable Electronic Devices (PEDs). Liberty Partners Inc - [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 ST02500SE](https://openairdocs.org/stc/ST02500SE): The installation of the Garmin GDL-88 with the Flight Stream 210 to allow ADS-B(In) Flight Information Service Broadcast (FIS-B), independent of the ADS-B(Out) solution compliance. Butler National Corporation - [STC SA1170GL](https://openairdocs.org/stc/SA1170GL): Except Model 55: Install Egan Aviation air ambulance stretcher P/N 125 using installation kit P/N 803, inverter/pump kit No. 808, 809, or 810. For Model 55, install air ambulance stretcher P/N 125 using installation kit P/N 804, medical oxygen system kit P/N 807, inverter/pump kit No. 808, 809, or810. Paul/ Lanna Egan LLC - [STC ST02583LA](https://openairdocs.org/stc/ST02583LA): Modification of the Engine Exhaust system that installs the Alloy Aerospace, Inc. hush kit on Learjet 20 series aircraft. Alloy Aerospace Inc - [STC ST02121CH](https://openairdocs.org/stc/ST02121CH): Certification for Reduced Vertical Separation Minimum (RVSM) operational capability and installation of dual Honeywell AM-250 Altimeters and Rosemount model 0856NA Pitot-Static Probes. Flight Test Aerospace, Inc - [STC ST01733WI](https://openairdocs.org/stc/ST01733WI): Installation of the Quiet Lear Hushkit or Avcon Noise Suppressor. Butler National Corporation - [STC ST02316LA](https://openairdocs.org/stc/ST02316LA): Installation of a Crane Aerospace & Electronics Tire Sensor Assembly. ELDEC Corporation - [STC ST01734WI](https://openairdocs.org/stc/ST01734WI): Installation of an Emergency Pneumatic Reservoir Assembly, EAS P/N 1260001-02. EAS Corporation - [STC ST03132CH](https://openairdocs.org/stc/ST03132CH): Installation of a single or dual Collins TDR-94/94D Mode S Transponder using existing control head, aircraft wiring, and antenna(s). Royal Air Inc - [STC ST00462LA](https://openairdocs.org/stc/ST00462LA): Modification of the engine exhaust system. Rooke Corporation dba Aviation Equipment - [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 SA232NW](https://openairdocs.org/stc/SA232NW): Installation of the Mark II performance system, including recontoured wind leading edge, recontoured flap leading edge, wind vortex generator removal, installation of wing stall strips and other minor refinements in accordance with Avcon Master Drawing List No. 1082 dated November 16, 2010, or later FAA approved revision. 350 Knot Vmo authorized if equipped in accordance with Avcon Master Drawing List No. 1082 dated November 16, 2010, or later FAA approved revision. An FAA approved airplane flight manual supplement is required for each model. Avcon Industries Inc - [STC SA841NW](https://openairdocs.org/stc/SA841NW): Installation of the Mark II performance system, including recontoured flap leading edge, wing vortex generator removal, installation of wing stall strips and other minor refinements in accordance with Avcon Master Drawing List No. 1085 dated November 16, 2010, or later FAA approved revision. 350 Knot Vmo authorized if equipped in accordance with Avcon Master Drawing No. 1085 dated November 16, 2010, or later FAA approved revision. An FAA approved Airplane Flight Manual Supplement is required for each model. Avcon Industries Inc - [STC ST01195WI](https://openairdocs.org/stc/ST01195WI): Installation of Rosemount Pitot/Static Probes, altimeters, and associated equipment in Learjet 20 series aircraft to obtain Reduced Vertical Separation Minimum approval. Avcon Industries Inc - [STC ST01842SE](https://openairdocs.org/stc/ST01842SE): Installation of a Sandel Avionics Horizontal Situation Indicator (HSI) and Attitude Direction Indicator (ADI). Butler National Corporation - [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 ST02265CH](https://openairdocs.org/stc/ST02265CH): Installation of Thrust Reverser Hydraulic System Modifications that were previously installed by STC SA1731SW, SA1669SW or SA1670SW. Leading Edge Designs LLC - [STC ST01904CH](https://openairdocs.org/stc/ST01904CH): Installation of IS&S Air Data Display Units 9D-80130-15, Analog Interface Unit 9B-81040-30, and Rosemount model 0856NA pitot-static probes. Limited to Learjet 24 models with MKII wings, 300 kts Vmo airspeed limitation, and JET FC-110 autopilot. Excludes serial numbers 25-337, 25-352, 25-361, and 25-370 through 25-372. Royal Air Inc - [STC ST02016CH](https://openairdocs.org/stc/ST02016CH): Certification for Reduced Vertical Separation Minimum (RVSM) operational capability. Excluding serial numbers 25-337, 25-352, 25-361, and 25-370 through 25-372. Royal Air Inc - [STC ST01946NY](https://openairdocs.org/stc/ST01946NY): Cockpit voice recorder replacement with Universal CVR 30B or CVR120. MidCanada Mod Center - [STC SA1170CE](https://openairdocs.org/stc/SA1170CE): Stretcher installation in cabin area. Med-Flite of Midamerica Inc All 69: https://openairdocs.org/model/gates-lear-jet-24b/stcs.md ## The same model under other registry codes Amateur-built copies and renamed makers get their own codes. - [Learjet 24B](https://openairdocs.org/model/learjet-24b): 3 registered aircraft, registry code 5170306 --- 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.