# Gates Learjet 35A (C-21A) - Type: Aircraft model (FAA registry) - Registry code: 5170809 - Manufacturer (registry): GATES LEARJET INC - Model: 35A (C-21A) - Aircraft type: Fixed wing multi engine - Category: Airplane - Engines: 2 · Turbo-fan - Seats: 10 - Weight class: 12,500 to 19,999 lb - Certification: Type certificated - Data sheet: [TCDS A10CE](https://openairdocs.org/tcds/A10CE) (OpenAirDocs) - Holder: Learjet Inc. - Registered aircraft: 1 - Page: https://openairdocs.org/model/gates-learjet-35a-c-21a 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 2022-05-01](https://openairdocs.org/ad/2022-05-01): Spoilers · Learjet 35, 35A (C-21A), 36 and 5 more. Effective Mar 9, 2022 - [AD 2018-19-04](https://openairdocs.org/ad/2018-19-04): TE Flap Control System · Learjet 28, 29, 31 and 9 more. Effective Oct 23, 2018 - [AD 2007-17-17](https://openairdocs.org/ad/2007-17-17): Unsealed gaps on the pylon side of the engine firewall · Learjet 31, 31A, 35 and 7 more. Effective Oct 2, 2007 - [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 2005-13-36](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 2004-03-08](https://openairdocs.org/ad/2004-03-08): Drag Angles of Fuselage and Engine Pylons · Learjet 31, 31A, 35 and 3 more. Effective Mar 15, 2004 - [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 2000-24-19](https://openairdocs.org/ad/2000-24-19): Flightcrew Oxygen Masks · Learjet 35, 35A (C-21A), 36 and 1 more. Effective Jan 4, 2001 - [AD 95-19-04 R1 RES](https://openairdocs.org/ad/95-19-04-R1-RES): Omega Navigation System · Learjet 35, 35A (C-21A), 36 and 4 more. Effective Mar 27, 2000 - [AD 99-23-19](https://openairdocs.org/ad/99-23-19): Spoiler Actuator · Learjet 31, 31A, 35 and 2 more. Effective Dec 21, 1999 - [AD 97-05-03 R1](https://openairdocs.org/ad/97-05-03-R1): Global Positioning Systems · BAE Systems Avro 146-RJ100A, BAe 146-200A, Jetstream Model 4101 and 27 more. Effective Apr 20, 1999 - [AD 98-06-28](https://openairdocs.org/ad/98-06-28): Auxiliary Cabin Heater Relay Box AWG Wire · Learjet 31 and 35A (C-21A). Effective Apr 24, 1998 - [AD 96-19-13](https://openairdocs.org/ad/96-19-13): Operating Mach Limit · Learjet 35, 35A (C-21A), 36 and 1 more. Effective Oct 22, 1996 - [AD 95-22-01](https://openairdocs.org/ad/95-22-01): Fluorescent Lighting System · Aerospace Lighting Fluorescent lighting systems, A310-203, A310-204 and 74 more. Effective Dec 4, 1995 - [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 91-03-08](https://openairdocs.org/ad/91-03-08): Fluorescent Lighting Systems · Learjet 31, 35, 35A (C-21A) and 5 more. Effective Feb 12, 1991 - [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 87-04-06](https://openairdocs.org/ad/87-04-06): Autopilot/Flight Director · Learjet 35, 35A (C-21A), 36 and 4 more. Effective Mar 9, 1987 - [AD 87-02-06](https://openairdocs.org/ad/87-02-06): Engine Mounts · Learjet 35, 35A (C-21A), 36 and 4 more. Effective Feb 6, 1987 - [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 85-16-04](https://openairdocs.org/ad/85-16-04): Aileron · Raisbeck Mark IV performance system (STC SA766NW). Effective Sep 6, 1985 - [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 79-08-01 R1](https://openairdocs.org/ad/79-08-01-R1): Thrust Reversers · Learjet 35, 35A (C-21A), 36 and 1 more. Effective Apr 19, 1982 - [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 80-19-09 R1](https://openairdocs.org/ad/80-19-09-R1): Jet Pumps · Learjet 23, 24, 24A and 20 more. Effective Dec 11, 1980 - [AD 80-17-11](https://openairdocs.org/ad/80-17-11): Airspeed Warning Placard · Learjet 35, 35A (C-21A), 36 and 1 more. Effective Aug 28, 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 80-06-02](https://openairdocs.org/ad/80-06-02): Electrical System · Learjet 35, 35A (C-21A), 36 and 1 more. Effective Mar 24, 1980 - [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 Historical (superseded or no longer in force): - [AD 96-11-07](https://openairdocs.org/ad/96-11-07) (historical): Auxiliary Cabin Heater Relay Box AWG Wire · Learjet 31 and 35A (C-21A). Effective Jun 28, 1996 - [AD 95-19-04](https://openairdocs.org/ad/95-19-04) (historical): Omega Navigation System · Learjet 35, 35A (C-21A), 36 and 4 more. Effective Oct 12, 1995 ## Information bulletins (advisory) (4) - [SAIB 2026-07](https://openairdocs.org/saib/2026-07): MAIN LANDING GEAR ATTACH SECTION, Trunnion Pins. Issued Mar 19, 2026 - [SAIB NM-16-24](https://openairdocs.org/saib/NM-16-24): Fuselage: Main Plate/Skin. Issued Sep 15, 2016 - [SAIB NM-13-38](https://openairdocs.org/saib/NM-13-38): Flight Controls Control Column Section. Issued Jun 24, 2013 - [SAIB NM-11-48](https://openairdocs.org/saib/NM-11-48): Ice and Rain Protection: Wing Transverse Duct Assembly. Issued Aug 22, 2011 ## Registered aircraft (1) - [N21VN](https://openairdocs.org/aircraft/N21VN): [C2d LLC](https://openairdocs.org/faa-owner/C2D%20LLC), [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington), built 1985, S/N 35A-560 ## NTSB investigations None matched to aircraft with this model. ## FAA accident and incident reports None matched to aircraft with this model. ## Service difficulty reports (726, newest 50) As reported by operators and repair stations, by the model named in the report. - [SDR 2026FA0000511](https://openairdocs.org/sdr/2026FA0000511), May 17, 2026: DIPSTICK. WORN. NR 1 ENGINE OIL PRESSURE DROPPED PRECIPITOUSLY, PRECAUTIONARY SHUTDOWN PERFORMED - [SDR 2025FA0000623](https://openairdocs.org/sdr/2025FA0000623), Sep 3, 2025: BRAKE ASSY. MISOVERHAULED. INTERNAL CONTAMINATION BLOCKING THE BLEED PORTS AND STATOR MISALIGNMENT WERE DISCOVERED DURING INSTALLATION/ROUTINE MAINTENANCE OF ELEVEN (11) BRAKE ASSEMBLIES - [SDR KC8A20241211005](https://openairdocs.org/sdr/KC8A20241211005), Dec 11, 2024: SENSOR. FAULTED. RIGHT ENGINE ROLLED BACK AND SHUT DOWN ON DESCENT. REPLACED RH ENGINE INLET PRESSURE AND TEMPERATURE SENSOR WITH A SERVICEABLE INSPECTED/TESTED SENSOR. COMPLIED - [SDR 2024F00313](https://openairdocs.org/sdr/2024F00313), Nov 15, 2024: WHEEL. OUT OF ALIGNMENT. AFTER TAKE OFF NOSE WHEEL WAS 30 DEGREES TO THE LEFT NOT STRAIGHT. - [SDR 2NEA20241106120](https://openairdocs.org/sdr/2NEA20241106120), Nov 6, 2024: MODULATING VALVE. MALFUNCTIONED. AFTER TAKEOFF AND GEAR RETRACTION THE FLIGHT CREW NOTED SMOKE EMITTING FROM THE CONDITIONED AIR DUCTS, AND NUMBER 1 ENGINE HIGH ITT, CREW RETURNED TO FIELD. AFT - [SDR KC8A20240805004](https://openairdocs.org/sdr/KC8A20240805004), Aug 5, 2024: LINE. BROKEN. AFTER THE CREW SELECTED GEAR DOWN FOR LANDING THEY DISCOVERED THEY HAD TWO GREEN AND THREE RED GEAR INDICATOR LIGHTS AND THE HYDRAULIC PRESSURE WAS INDICATING Z - [SDR BSYR20240723217](https://openairdocs.org/sdr/BSYR20240723217), Jul 14, 2024: WIRE. CHAFED. WHILE ON INITIAL CLIMB OUT FROM LCK WE LEVELED O? AT 3000 AND MADE A TURN TO THE EAST. THE RIGHT T HANDLE AND ANNUNCIATORS WENT O? INDICATING A POSSIBLE ENGINE - [SDR 2024FA0000434](https://openairdocs.org/sdr/2024FA0000434), Jun 7, 2024: CONTROL VALVE. FAULTED. CABIN PRESSURE LOSS @ FL 410. EMERGENCY DECENT INTO KICT WITHOUT INCIDENT. AIRCRAFT GROUND TESTED PRESSURIZATION SYSTEM IAW MM-99 21-30-00 WITH NO DEFECTS NOTED - [SDR ESPA2023072400308](https://openairdocs.org/sdr/ESPA2023072400308), Jul 17, 2023: UNKNOWN. UNKNOWN. DURING CRUISE, RH ENGINE EXPERIENCED A FLAMEOUT. THE FLIGHT CREW SECURED THE MOTOR AND RETURNED TO BASE. MAINTENANCE PERSONNEL REMOVED AND REPLACED THE RH FUEL - [SDR 2023FA0000001](https://openairdocs.org/sdr/2023FA0000001), Jan 4, 2023: CABIN PRESSURE. FAULTED. CABIN ALTITUDE DECREASED AND EMERGENCY VALVES DEPLOYED AT FL350 - [SDR 2022F00425](https://openairdocs.org/sdr/2022F00425), Oct 26, 2022: UNKNOWN. UNKNOWN. WHILE CLIMBING TO FL400 (NOT QUITE REACHING FL400 YET, BUT GETTING CLOSE) AN EMER PRESS VALVE OPENED. THE CABIN RATE OF CLIMB BEGAN TO SHOW ERRATIC READINGS. WE - [SDR 2022F00410](https://openairdocs.org/sdr/2022F00410), Oct 23, 2022: NONE. NONE. ON ACTIVATION ON PILOT INSTRUMENT LIGHT RHEOSTAT, SMOKE WAS EVIDENT FROM BEHIND THE MAIN INSTRUMENT PANEL. RETURNED TO THE AIRPORT OF ORIGIN, LANDING UNEVENTFUL - [SDR 2022F00351](https://openairdocs.org/sdr/2022F00351), Aug 19, 2022: HYDRAULIC LINE. LEAKING. AFTER TAKEOFF FROM KFXE, I RAN THE AFTER TAKE OFF CHECKLIST. I CHECKED THE HYDRAULIC PRESSURE, AND IT WAS NORMAL. UPON REACHING 10,000FT, THE CREW NOTICED THE " - [SDR 2022F00261](https://openairdocs.org/sdr/2022F00261), Jun 3, 2022: NONE. STUCK. RIGHT BEFORE WE ROTATED HOT BLEED AIR STARTED COMING INTO COCKPIT AND A LOT OF SMOKE. WE IMMEDIATELY DECIDED TO TURN BACK TO THE AIRPORT AND LAND. THERE WERE NO - [SDR 2022F00208](https://openairdocs.org/sdr/2022F00208), May 5, 2022: NONE. NONE. SMOKE IN CABIN AFTER EMERGENCY PRESSURIZATION VALVE OPENED, CREW ON A 91 FLIGHT LANDED AS SOON AS POSSIBLE IN GJT. - [SDR 2021F00357](https://openairdocs.org/sdr/2021F00357), Nov 11, 2021: ELEC CONNECTOR. SHORTED. CABIN PRESSURIZATION SYSTEM WENT INTO EMERGENCY BLEED AIR MODE. LH MOD VLV CB TRIPPED. REMOVED AND REPLACED INTERNALLY SHORTED LH EMERGENCY PRESSURE VALVE (B223 - [SDR O2JA N990LC210603](https://openairdocs.org/sdr/O2JA%20N990LC210603), Jun 3, 2021: ENGINE. FLUCTUATES. ON TAKEOFF POWER THE RIGHT ENGINE WILL FLUCTUATE ON FUEL FLOW, N1, AND N2. - [SDR O2JA2021051900151](https://openairdocs.org/sdr/O2JA2021051900151), May 18, 2021: HYDRAULIC SYSTEM. PRESSURE LOSS. HYDRAULIC PRESSURE LOSS. ALTERNATE LANDING GEAR EXTENSION WAS PERFORMED. - [SDR 2021F00102](https://openairdocs.org/sdr/2021F00102), May 4, 2021: SHUTOFF VALVE. LEAKING. CABIN WAS NOT PRESSURIZING CORRECTLY , EMERGENCY AIR AND CABIN ALTITUDE ANNUNCIATOR WARNING LIGHTS CAME ON. FLIGHT CREW DECALED AN EMERGENCY AND AND PERFORMED A - [SDR 2021F00077](https://openairdocs.org/sdr/2021F00077), Apr 16, 2021: WIRE. SEPARATED. ON APPROACH TO BNA CREW SELECTED LANDING GEAR DOWN. THE NOSE GEAR INDICATOR LIGHT DID NOT SHOW DOWN AND LOCK , CREW TESTED LANDING GEAR INDICATOR LIGHT SYSTEM A - [SDR 2021FA0000010](https://openairdocs.org/sdr/2021FA0000010), Jan 12, 2021: HYDRAULIC LINE. CHAFED. TWO HYDRAULIC LINES FOR THE THRUST REVERSER SYSTEM IN THE TAIL RUBBED AGAINST EACH OTHER AND CHAFED THROUGH. IT WAS CHAFED THROUGH TO POINT THAT THERE WAS PIN H - [SDR BSYR20210105001](https://openairdocs.org/sdr/BSYR20210105001), Dec 30, 2020: FLOW VALVE. STICKING. CABIN ALTITUDE STARTED CLIMBING UPON ACTIVATION OF THE ANTI-ICE SYSTEM DURING DESCENT FROM FL380. CABIN ALTITUDE WARNING SYSTEM ACTIVATED. CREW EXECUTED AN EMER - [SDR 2020F00481](https://openairdocs.org/sdr/2020F00481), Dec 3, 2020: COMPUTER. FAILED. AFTER LANDING WITH STEERING SYSTEM ENGAGED AT END RUNWAY CREW COULD TURN PLANE ONTO TAXI WAY NOTIFY TOWER THEY WERE HAVING PROBLEM WITH TURNING (STEERING) AIRCR - [SDR KC8A20201130002](https://openairdocs.org/sdr/KC8A20201130002), Nov 23, 2020: CIRCUIT BREAKER. TRIPPED. AIRCRAFT EXPERIENCED PARTIAL ELECTRICAL POWER LOSS. CREW WERE PERFORMING TRAINING ON RETURN LEG FROM KTEB OVER ATC APPROVED AREA NEAR HOME BASE KYIP. LEFT ESSEN - [SDR O2JA20201110N995](https://openairdocs.org/sdr/O2JA20201110N995), Nov 10, 2020: FIRE WARNING. ILLUMINATED. LEFT ENGINE FIRE LIGHT ON DURING FLIGHT. - [SDR O2JA131201001](https://openairdocs.org/sdr/O2JA131201001), Oct 1, 2020: CABIN PRESSURE. MALFUNCTIONED. CABIN ALTITUDE STARTED RISING AT 1000 FAM AT FL 430 IN CRUISE. TRIED TO STABILIZE CABIN ALTITUDE MANUALLY USING CHERRY-PICKER BUT TO NO AVAIL. FORCED TO PERFORM - [SDR O2JA202082401](https://openairdocs.org/sdr/O2JA202082401), Aug 19, 2020: WARNING MESSAGE. ACTIVATED. LEFT OIL PRESSURE RED LINED ON TAKE OFF. DURING CLIMB IT REMAINED AROUND 53 PSI. - [SDR O2JA20200625001](https://openairdocs.org/sdr/O2JA20200625001), Jun 24, 2020: ENGINE. POWER LOSS. THE ISSUE HAPPENS SOMETIMES. DURING CLIMB OUT AROUND 14,000FT TO 20,000FT THE LEFT ENGINE LOST THRUST ASSOCIATED WITH N1, ITT, N2, AND FUEL FLOW INDICATION CHAN - [SDR O2JA2020061000001](https://openairdocs.org/sdr/O2JA2020061000001), Jun 10, 2020: WARNING SYSTEM. FALSE ACTIVATION. WHILE CLIMBING THROUGH LOW 20'S (AROUND FL220), NOTICED RIGHT BLEED AIR LIGHT CAME ON. RAN CHECKLIST, LIGHT STAYED ON, NO ABNORMAL OPERATIONS OR OTHER INDICATIO - [SDR KC8A2020052903](https://openairdocs.org/sdr/KC8A2020052903), May 29, 2020: CASTING. CRACKED. LEFT HAND TIP TANK CASTING WAS FOUND CRACKED AT THE TOP AFT END DURING ROUTINE INSPECTION. CRACK WAS REPAIRED IN ACCORDANCE WITH FAA FORM 8100-9, DRAWING NR R35 - [SDR BHKR2020052700001](https://openairdocs.org/sdr/BHKR2020052700001), May 27, 2020: FIRE LOOP. FAILED. LEFT ENGINE FIRE LIGHT CAME ON APPROXIMATELY 5 MINUTES AFTER TAKE OFF. NO SPIKE IN TURBINE TEMPERATURE. THROTTLE BROUGHT BACK TO IDLE. FIRE LIGHT WENT OUT. EMER - [SDR KC8A2020031802](https://openairdocs.org/sdr/KC8A2020031802), Mar 18, 2020: FRAME. CORRODED. CORROSION WAS FOUND DURING AIRCRAFT INSPECTION OF THE FUSELAGE SKINS, STRINGERS AND FRAMES AT THE FOLLOWING LOCATIONS: 1. LEFT SIDE FUSELAGE AT FRAME 22 TO FRAM - [SDR RMVA2020031000000](https://openairdocs.org/sdr/RMVA2020031000000), Mar 10, 2020: O-RING. CUT. WHILE ENROUTE, THE LOW OIL PRESSURE LIGHT BEGAN TO FLICKER. IDENTIFIED VIA THE OIL PRESSURE GAUGE THAT THE NO. 2 ENGINE OIL PRESSURE WAS FLUCTUATING BETWEEN 30- - [SDR O2JA2020022800001](https://openairdocs.org/sdr/O2JA2020022800001), Feb 28, 2020: COMPRESSOR. STALLED. DURING TEST FLIGHT AT FL 380 + CLIMBING ENGINE FIRE INDICATION ILLUMINATED ON RIGHT SIDE. ENGINE FIRE MEMORY ITEMS + QRH WERE FOLLOWED BUT WAS UNSUCCESSFUL IN E - [SDR O2JA2020022100173](https://openairdocs.org/sdr/O2JA2020022100173), Feb 18, 2020: ENGINE. FAILED. WHILE FLYING AT FL 390 RIGHT FIRE LIGHT ILLUMINATED, FOLLOWED EMERGENCY CHECK LIST. WHEN ENGINE WAS PULLED TO IDLE, ENGINE STARTED MAKING LOUD BANGING NOSE UNTI - [SDR BHKR2020012118001](https://openairdocs.org/sdr/BHKR2020012118001), Jan 18, 2020: OUTFLOW VALVE. CRACKED. DURING A PART 91 FLIGHT WORKING WITH THE US NAVY IN WARNING AREAS OFF THE COAST OF NORTH CAROLINA THE FLIGHT CREW REPORTED HAVING DIFFICULTY MAINTAINING CABIN P - [SDR 2020FA0000077](https://openairdocs.org/sdr/2020FA0000077), Jan 16, 2020: HYDRAULIC SYSTEM. FAILED. HYDRAULIC SYSTEM FAILURE. PRESSURE DROPPED UPON FIRST NOTCH FLOP EXTENSION. BLEW GEAR DOWN AND USED EMERGENCY BRAKES HYDRAULIC FLUID LEAKING HEAVILY FROM UNDERS - [SDR 2020F00261](https://openairdocs.org/sdr/2020F00261), Jan 12, 2020: PUMP. FAILED. LEFT STANDBY FUEL PUMP FAILED IN FLIGHT DURING FUEL TRANSFER. - [SDR CDNA2020010922001](https://openairdocs.org/sdr/CDNA2020010922001), Dec 22, 2019: THROTTLE CABLE. SEVERED. AS REPORTED BY PILOTS: "WE WERE MEDEVAC STATUS DEPARTING PHL BOUND FOR YIP WITH 3 PAX ON BOARD. NORMAL ENGINE START AND TAXI FROM ATLANTIC FBO RAMP TO APPROACH - [SDR 2020F00049](https://openairdocs.org/sdr/2020F00049), Oct 18, 2019: PACKING. MISSING. PILOTS NOTICED LOW OIL PRESSURE INDICATION AFTER CLIMBING THRU 30,000 FEEET ON LEFT ENGINE. WENT THRU OILPRESSURE CHECK LIST AND REDUCED POWER. LOW OIL PRESSURE - [SDR ESPA2019091600305](https://openairdocs.org/sdr/ESPA2019091600305), Sep 13, 2019: UNKNOWN. ODOR. DURING CRUISE FLIGHT CONDITIONS MEDICS NOTICED SMOKE IN THE CABIN. PIC DECIDED TO DIVERT AND DECLARE AN EMERGENCY LANDING DUE TO SMOKE IN THE CABIN INTO AIRPORT - [SDR Y6WA2019091700000](https://openairdocs.org/sdr/Y6WA2019091700000), Sep 12, 2019: HYDRAULIC LINE. CHAFED. AIRCRAFT WAS IN ROUTE, DIVERTED. DUE TO HYDRAULIC FAILURE. AIRCRAFT DECLARED AN EMERGENCY LANDING. GEAR WAS BLOWN DOWN WITH EMERGENCY AIR BOTTLE. AIRCRAFT LANDE - [SDR O9IA201809100001](https://openairdocs.org/sdr/O9IA201809100001), Sep 10, 2019: TIRE. FAILED. MAINT WAS NOTIFIED THAT THE RH MAIN TIRES WERE BLOWN ON THE TAKE OFF ROLL ON RUNWAY 33. THE CREW ABORTED TAKEOFF AND STOPPED THE AIRCRAFT ON THE RUNWAY. AT THIS - [SDR O9IAN09102018001](https://openairdocs.org/sdr/O9IAN09102018001), Sep 10, 2019: TIRE. FAILED. MAINT WAS NOTIFIED THAT THE RH MAIN TIRES WERE BLOWN ON THE TAKE OFF ROLL ON RUNWAY 33. THE CREW ABORTED TAKEOFF AND STOPPED THE AIRCRAFT ON THE RUNWAY. AT THIS - [SDR O2JA201908140001](https://openairdocs.org/sdr/O2JA201908140001), Aug 12, 2019: O-RING. LEAKING. LOW HYDRAULIC CAME ON 30 MINUTES OUTSIDE PHX HYDRAULIC PRESSURE DROPPED BELOW 600 PSI. MAINTENANCE TROUBLESHOT HYDRAULIC LEAK TO A LOOSE LINE ON LEFT HAND RETRA - [SDR CA190808006](https://openairdocs.org/sdr/CA190808006), Aug 7, 2019: CONTROL VALVE. FAILED. (CAN) PILOT REPORTED: IN CRUISE THE RH T/R UNLOCK LIGHT ILLUMINATED. AT TOP OF DECENT PUSHED THE T/R TEST AND NOTED YAW TO THE RIGHT THAT FELT LIKE RH T/R DEPLO - [SDR O2JA20190604595](https://openairdocs.org/sdr/O2JA20190604595), Jun 1, 2019: FITTING. LEAKING. BURNING SMELL IN THE CABIN. ALL CREW RETURNED TO DEPARTURE BASE SAFELY. TECHNICIAN TROUBLESHOT AND FOUND RH WING HEAT FITTING LEAKING HOT AIR. ADJUSTED AS NEEDE - [SDR O9IA201905315431](https://openairdocs.org/sdr/O9IA201905315431), May 31, 2019: NONE. NONE. ENROUTE. TOP OF CLIMB, 20 MINS INTO FLT, PERSONNEL IN THE AFT SEAT NOTED AN ACRID SMELL IN CABIN. ABORTED MISSION & RETURNED TO DEPARTURE UNEVENTFULLY. CREW STA - [SDR MFUA2019FA0000142](https://openairdocs.org/sdr/MFUA2019FA0000142), May 7, 2019: HYDRAULIC LINE. CHAFED. DURING DECENT INTO AIRPORT, FOR LANDING, ALL HYDRAULIC PRESSURE WAS LOST. INITIALLY FLAPS SELECTED TO 8 DEGREES WAS GOOD BUT WHEN 20 DEGREES FLAPS WERE SELECTED - [SDR Y6WA2019FA0000064](https://openairdocs.org/sdr/Y6WA2019FA0000064), Mar 12, 2019: FIRE DETECTOR. FAILED. WE WERE CLIMBING SOMEWHERE IN THE LOW 20’S. WE THEN NOTICED THE MASTER CAUTION FLASHING. A QUICK SEARCH OF THE PANEL ALSO REVEALED THE LEFT ENGINE FIRE LIGHT TO All 726: https://openairdocs.org/model/gates-learjet-35a-c-21a/reports.md ## STCs that may be installed (OpenAirDocs) (228, 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 ST01305WI-D](https://openairdocs.org/stc/ST01305WI-D): 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 ST12461IB](https://openairdocs.org/stc/ST12461IB): Installation of Cockpit Voice Recorder with optional RIPS Upgrade. Mid- Canada Mod Center - [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 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 ST02515SE](https://openairdocs.org/stc/ST02515SE): Installation of the replacement vertical accelerometer, Butler National Part Number 501-1287-02 MOD A. 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 ST02036WI](https://openairdocs.org/stc/ST02036WI): Installation of an additional Garmin G700 TXi Primary Flight Display or Multifunction Display. Butler National Corporation - [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 ST01083DE](https://openairdocs.org/stc/ST01083DE): Installation of the Aviation Clean Air Airborne Air & Surface Purification System. Lee Aerospace, Inc - [STC ST04728NY](https://openairdocs.org/stc/ST04728NY): Installation of LAI CoolView Cabin Window. Lee Aerospace Inc - [STC SA709NE](https://openairdocs.org/stc/SA709NE): Installation of Marquardt MTR-101 Tow Reel System. Phoenix Air Group Inc - [STC ST00814WI](https://openairdocs.org/stc/ST00814WI): Landing Gear Life Extension. Phoenix Air Group Inc - [STC ST00999WI](https://openairdocs.org/stc/ST00999WI): Installation of Special Mission Power and Control Wiring, provisions for Carriage of Mission Stores with Hardpoints installed by STC SA1604SO or SA1670CE, and Takeoff weight increased to 16,300 lbs. Phoenix Air Group Inc - [STC ST10217SC](https://openairdocs.org/stc/ST10217SC): Approval of underwing stores including carriage of the MTR101 Tow Reel System (and targets) on the Strongback-Lear (Sentel) hardpoint. 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 ST01517WI](https://openairdocs.org/stc/ST01517WI): Installation of the Glareshield LED Lighting System. Global Aviation Tech LLC - [STC ST01602WI](https://openairdocs.org/stc/ST01602WI): Installation of Luminescent Overlay panels upgrade. Global Aviation Tech LLC - [STC ST04393CH](https://openairdocs.org/stc/ST04393CH): Avionics upgrade installation of a Garmin GTN (TM) 750 Touchscreen Navigator interfaced to existing pilot side instruments and existing FC-200 or FC-530/-550 Autopilot and added GWX (TM) 70 Weather Radar. The Garmin GTN (TM) 750 GPS is paired with the added GTX (TM) 345R (or GTX 33/33D) Transponders for Automatic Broadcast Surveillance (ADS-B) OUT and ADS-B IN (GDL-88) capability with wireless download connectivity utilizing Garmin Connext®. Optional second Garmin GTN (TM) 650/750 interfaced to existing copilot side instruments only. Royal Air Inc - [STC ST04575AT](https://openairdocs.org/stc/ST04575AT): Installation of the Rockwell Collins ALT-1000+/ -4000+ with 5G Filtering. Chippewa Aerospace Inc - [STC ST00223MC](https://openairdocs.org/stc/ST00223MC): Cockpit Cooling System Modification. Duncan Aviation Inc - [STC ST01070DE](https://openairdocs.org/stc/ST01070DE): Installation of the Curtiss-Wright Fortress Flight Data Recorder (with Cockpit Voice Recorder). Peregrine - [STC ST01682WI](https://openairdocs.org/stc/ST01682WI): Installation of Heads Up Technologies (HUT) Cabin Entertainment System (CES). Heads Up Technologies Inc - [STC ST00098IB](https://openairdocs.org/stc/ST00098IB): Introduction of ADS-B Out. STC Twenty One Limited - [STC ST04221NY](https://openairdocs.org/stc/ST04221NY): Installation of LAI Heated Windshields. Lee Aerospace Inc - [STC ST02004WI](https://openairdocs.org/stc/ST02004WI): Installation of the Garmin GI-275 Instantaneous Vertical Speed Indicators (IVSI). Peregrine - [STC ST02635AT](https://openairdocs.org/stc/ST02635AT): Deactivation of Aeronca (Learjet) Thrust Reversers. Summit Aviation Inc - [STC ST01881WI](https://openairdocs.org/stc/ST01881WI): Installation of the Garmin GTS 8000 TCAS II System and Dual GTX 3000 Transponders for ADS-B Out Compliance and Interface of factory installed FC-530 Autopilot System to Single/Dual GTN 7XX/6XX Navigators. Avcon Industries Inc - [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 ST01102WI](https://openairdocs.org/stc/ST01102WI): Installation of a Universal Avionics MFD-640 Multi-Function Display. Blackhawk Aerospace Technologies Inc - [STC ST01103WI](https://openairdocs.org/stc/ST01103WI): Installation of a Universal Avionics (TAWS) Terrain Awareness and Avoidance System. Blackhawk Aerospace Technologies Inc - [STC ST04481CH](https://openairdocs.org/stc/ST04481CH): Replacement of similar functioning circuit and switch for obsolete steering interface unit (SIU) in accordance with Butler National Master Data List 0200 I 020 Revisio n (A) , dat ed 14 MAY 2021, or later FAA Approved Revision. Butler National Corporation - [STC ST04177AT](https://openairdocs.org/stc/ST04177AT): Installation of a Talon Aerospace LED Replacement General Purpose Lamps. Aaxico Technical Services Inc - [STC ST00155MC](https://openairdocs.org/stc/ST00155MC): Installation of the Items. Global Aviation Technologies - [STC ST01926WI](https://openairdocs.org/stc/ST01926WI): Interface of factory installed FC-530/FC-535 Autopilot System to Single/Dual GTN 750/650 Navigators. Avcon Industries Inc - [STC ST04447CH](https://openairdocs.org/stc/ST04447CH): Installation of Garmin GTS (TM) 8000 TCAS/ACAS II Traffic Surveillance system, dual GTX (TM) 3000 Mode-S Extended Squitter Transponders and GDL® 88 receiver for a complete ADS-B In/Out capability and a Flight Stream 210 for wireless download connectivity using Garmin Connext®. Installation in accordance with Royal Air Master Document List No. RACB-MDL-3000, Revision A, dated January 06, 2020, or later FAA approved revision. Royal Air 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 ST01178WI](https://openairdocs.org/stc/ST01178WI): Installation of PWI Electrode Inverter, Glareshield Lighting System. PWI Inc - [STC ST00882DE](https://openairdocs.org/stc/ST00882DE): Installation of Becker Avionics BXT6553 transponder. Peregrine - [STC ST02455SE](https://openairdocs.org/stc/ST02455SE): Installation of Dual GTX-3000 Transponders, GDL-88 Automatic Dependent Surveillance-Broadcast (ADS-B) (In) with Wide Area Augmentation System (WAAS) Global Positioning System (GPS) sensor and Flight Stream 210 Bluetooth Connectivity installed for ADS-B (Out) compliance. Butler National Corporation - [STC ST09366SC](https://openairdocs.org/stc/ST09366SC): Installation of an Electric-Driven Vapor Cycle air conditioning system. Air Comm Corporation - [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 All 228: https://openairdocs.org/model/gates-learjet-35a-c-21a/stcs.md ## PMA parts (OpenAirDocs) (527, first 50) Current parts manufacturer approvals (PMA): parts the FAA has approved companies to make as replacements or modifications. Each record lists its models as free text; OpenAirDocs matched them to this model on its data sheet, so check the FAA record before relying on it. Newest first. - [501-1287-02 Mod A](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID196534263820260716210951.0001): Replacement Vertical Accelerometer. Butler Avionics Inc. · PMA PQ04263CE · Modification part · Jul 10, 2026 - [90004003, 90004005, 90004006](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID170091888220260716210949.0001): Replacement Clock/Clock with USB Port. Butler Avionics Inc. · PMA PQ04263CE · Modification part · Jul 10, 2026 - [BA07109001-101BA07109002-101](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID162413718620260716210949.0001): Mid Continent MD23 standby altimeter/ attitude indicator. Butler Avionics Inc. · PMA PQ04263CE · Modification part · Jul 10, 2026 - [02002059-101](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID131028446220260716210950.0001): Replacement Steering Interface Unit (SIU). Butler Avionics Inc. · PMA PQ04263CE · Modification part · Jul 10, 2026 - [90002020-101, 90002020-107](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID127441501220260716210949.0001): Cabin/Cockpit Handheld Fire Extinguisher. Butler Avionics Inc. · PMA PQ04263CE · Modification part · Jul 10, 2026 - [501-1169-02 Mod A](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID106825306520260716210952.0001): Rate Gyroscope, RG-227. Butler Avionics Inc. · PMA PQ04263CE · Replaces 501-1169-02 Mod A · Jul 10, 2026 - [MDL 08801000](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID157355200820250905142244.0001): Cabin/Cockpit Handheld Fire Extinguishers. Avcon Industries Inc · PMA PQ3505CE · Modification part · Sep 2, 2025 - [D6-4HP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID197792825120250807175623.0001): Spring Washer. Central Texas Aircraft Parts (CTAP) · PMA PQ0880SW · Replaces D6-4 · Aug 4, 2025 - [D6-1HP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID192270059020250807175622.0001): Spring Washer. Central Texas Aircraft Parts (CTAP) · PMA PQ0880SW · Replaces D6-1 · Aug 4, 2025 - [3233190-2HP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID157774788920250807175623.0001): Vespel Bearing. Central Texas Aircraft Parts (CTAP) · PMA PQ0880SW · Replaces 3233190-2 · Aug 4, 2025 - [MDL 05701000](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID176265189220250610132201.0001): Garmin G700 TXi Primary Flight Display or Multifunction Display. Avcon Industries Inc · PMA PQ3505CE · Modification part · Jun 6, 2025 - [MDL 08501000](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID141478375320250610132201.0001): Clock/Clock with USB Port. Avcon Industries Inc · PMA PQ3505CE · Modification part · Jun 6, 2025 - [RFS8A20](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID158229685120250106202732.0001): Rivet. Rapco Fleet Support Inc · PMA PQ2386CE · Replaces GYR8A-20 · Dec 19, 2024 - [447883LA](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID191970666120241107175408.0001): Valve, Safety Assy. LanAir Research and Development Inc · PMA PQ1031NE · Replaces 447883 · Nov 5, 2024 - [LA01000X200A20B6](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID156012695020241016174901.0001): O-Ring. LanAir Research and Development Inc · PMA PQ1031NE · Replaces R01000X200A20B6 · Aug 28, 2024 - [LA449039](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID104281461120241016174953.0001): Mask Lock. LanAir Research and Development Inc · PMA PQ1031NE · Replaces 449039 · Aug 28, 2024 - [RFS6015](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID172309453020240826152133.0001): Piston Insulator. Rapco Fleet Support Inc · PMA PQ2386CE · Replaces 9535042-1 · Aug 8, 2024 - [232-20426-1HP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID100808167620240703182619.0001): Bushing. Central Texas Aircraft Parts (CTAP) · PMA PQ0880SW · Replaces 232-20426-1 · Jun 24, 2024 - [5010711AB](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID167001640720250128190923.0001): Swage, Adjuster. Aero Brake & Spares Inc · PMA PQ0694SW · Replaces 5010711 · May 31, 2024 - [232-20268-503HP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID177991599320240703182601.0001): Bolt. Central Texas Aircraft Parts (CTAP) · PMA PQ0880SW · Replaces 232-20268-503 · May 17, 2024 - [45-12216-1HP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID149870491420240703182602.0001): Bearing. Central Texas Aircraft Parts (CTAP) · PMA PQ0880SW · Replaces 45-12216-1 · May 17, 2024 - [GYR8A20AB](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID126835377020250128190840.0001): Rivet, Semi-Tubular. Aero Brake & Spares Inc · PMA PQ0694SW · Replaces GYR8A20 · Apr 3, 2024 - [6910100-040](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID170740333020240417175527.0001): Cabin Lighting System. PWI Inc · PMA PQ4159CE · Replaces 6900112-000, 6635-320-2S · Feb 27, 2024 - [AAP- 117088](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID118695032520230831200747.0001): Bearing. Approved Air Parts Co Inc · PMA PQ4173NE · Replaces Honeywell P/N 117088 · Aug 28, 2023 - [PA-200626-813](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID108482291320230426113840.0001): Installation KitCSRS. Peregrine LLC · PMA PQ5257NM · Modification part · Apr 24, 2023 - [45-12216-1HP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID124235729020231024184825.0001): Bearing. Central Texas Aircraft Parts (CTAP) · PMA PQ0880SW · Replaces 45-12216-1 · Dec 22, 2022 - [232-20268-503HP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID122503861620231024184821.0001): Bolt. Central Texas Aircraft Parts (CTAP) · PMA PQ0880SW · Replaces 232-20268-503 · Dec 22, 2022 - [232-20426-1HP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID117655467920231024184807.0001): Bushing. Central Texas Aircraft Parts (CTAP) · PMA PQ0880SW · Replaces 232-20426-1 · Dec 22, 2022 - [JTE3165803-1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID100070621520230216160221.0001): Filter-Disk. JET-TECH ENGINEERING INC · PMA PQ1680CE · Replaces 3165803-1 · Dec 5, 2022 - [121724-3](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID195716129020230807135147.0001): Shaft Assembly, Flexible. Honeywell International Inc. · PMA PQ1222NM · Replaces 121724-3 · Nov 18, 2022 - [3213798-1-1 (Series 5)](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID188307769820230807135158.0001): Valve, Regulating & Shutoff Pneumatic Pressure. Honeywell International Inc. · PMA PQ1222NM · Replaces 3213798-1-1 · Nov 18, 2022 - [3213798-1-1 (Series 2)](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID183687147420230807135154.0001): Valve, Regulating & Shutoff Pneumatic Pressure. Honeywell International Inc. · PMA PQ1222NM · Replaces 3213798-1-1 · Nov 18, 2022 - [3213798-1-1 (Series 3)](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID179795925020230807135156.0001): Valve, Regulating & Shutoff Pneumatic Pressure. Honeywell International Inc. · PMA PQ1222NM · Replaces 3213798-1-1 · Nov 18, 2022 - [3214478-1 (Series 3)](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID177135405120230807135206.0001): Valve, Regulating & Shutoff Pneumatic Pressure. Honeywell International Inc. · PMA PQ1222NM · Replaces 3214478-1 · Nov 18, 2022 - [3214478-2 (Series 1)](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID163919218020230807135207.0001): Valve, Regulating & Shutoff Pneumatic Pressure. Honeywell International Inc. · PMA PQ1222NM · Replaces 3214478-2 · Nov 18, 2022 - [3214478-2 (Series 2)](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID163531489320230807135208.0001): Valve, Regulating & Shutoff Pneumatic Pressure. Honeywell International Inc. · PMA PQ1222NM · Replaces 3214478-2 · Nov 18, 2022 - [3282516-1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID163131671820230807135149.0001): Rack Assembly, Outboard. Honeywell International Inc. · PMA PQ1222NM · Replaces 3282516-1 · Nov 18, 2022 - [3214478-1 (Series 1)](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID160526195020230807135204.0001): Valve, Regulating & Shutoff Pneumatic Pressure. Honeywell International Inc. · PMA PQ1222NM · Replaces 3214478-1 · Nov 18, 2022 - [3214478-1 (Series 2)](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID153619556120230807135205.0001): Valve, Regulating & Shutoff Pneumatic Pressure. Honeywell International Inc. · PMA PQ1222NM · Replaces 3214478-1 · Nov 18, 2022 - [3213798-1-1 (Series 8)](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID151240586220230807135202.0001): Valve, Regulating & Shutoff Pneumatic Pressure. Honeywell International Inc. · PMA PQ1222NM · Replaces 3213798-1-1 · Nov 18, 2022 - [3213798-1-1 (Series 1)](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID145356314120230807135153.0001): Valve, Regulating & Shutoff Pneumatic Pressure. Honeywell International Inc. · PMA PQ1222NM · Replaces 3213798-1-1 · Nov 18, 2022 - [3213798-1-1 (Series 7)](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID145040278320230807135200.0001): Valve, Regulating & Shutoff Pneumatic Pressure. Honeywell International Inc. · PMA PQ1222NM · Replaces 3213798-1-1 · Nov 18, 2022 - [3213798-1-1 (Series 4)](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID139448897820230807135156.0001): Valve, Regulating & Shutoff Pneumatic Pressure. Honeywell International Inc. · PMA PQ1222NM · Replaces 3213798-1-1 · Nov 18, 2022 - [3282516-2](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID121792992120230807135151.0001): Rack Assembly, Inboard. Honeywell International Inc. · PMA PQ1222NM · Replaces 3282516-2 · Nov 18, 2022 - [32-2867-006](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID121742167420230807135152.0001): Valve, Air Shutoff. Honeywell International Inc. · PMA PQ1222NM · Replaces 32-2867-006 · Nov 18, 2022 - [3213798-1-1 (Series 9)](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID105146337820230807135203.0001): Valve, Regulating & Shutoff Pneumatic Pressure. Honeywell International Inc. · PMA PQ1222NM · Replaces 3213798-1-1 · Nov 18, 2022 - [3213798-1-1 (Series 6)](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID100537578520230807135159.0001): Valve, Regulating & Shutoff Pneumatic Pressure. Honeywell International Inc. · PMA PQ1222NM · Replaces 3213798-1-1 · Nov 18, 2022 - [AG844000-23](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID113381563120220809102536.0001): Gasket – UHF/VHF Antenna. Aviation Devices & Electronic Components LLC (Av-DEC) · PMA PQ3846SW · Modification part · Apr 18, 2022 - [PA-200710-803](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID151138570220220316202454.0001): Installation KitIonizer Lear 30 Series. Peregrine LLC · PMA PQ5257NM · Modification part · Feb 28, 2022 - [AG844000-15](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID170561690420220408135755.0001): Gasket – UHF/VHF Antenna. Aviation Devices & Electronic Components, LLC · PMA PQ03846SW · Modification part · Feb 8, 2022 All of them: https://openairdocs.org/model/gates-learjet-35a-c-21a/pma.md ## The same model under other registry codes Amateur-built copies and renamed makers get their own codes. - [Gates Learjet 35A](https://openairdocs.org/model/gates-learjet-35a): 135 registered aircraft, registry code 5170602 - [Learjet 35A](https://openairdocs.org/model/learjet-35a): 23 registered aircraft, registry code 5170802 - [Lindstrand Balloons 35A](https://openairdocs.org/model/lindstrand-balloons-35a): 8 registered aircraft, registry code 5180031 - [Arbc Inc DBA Lindstrand 35A](https://openairdocs.org/model/arbc-inc-dba-lindstrand-35a): 2 registered aircraft, registry code 5190023 - [Learjet 35A](https://openairdocs.org/model/learjet-35a): 1 registered aircraft, registry code 5170711 --- 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.