# Gates Lear Jet 25

- Type: Aircraft model (FAA registry)
- Registry code: 5170509
- Manufacturer (registry): GATES LEAR JET
- Model: 25
- Aircraft type: Fixed wing multi engine
- Category: Airplane
- Engines: 2 · Turbo-jet
- Seats: 10
- Weight class: 12,500 to 19,999 lb
- Cruise speed: 388 mph
- 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-lear-jet-25

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 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 82-01-04 R2](https://openairdocs.org/ad/82-01-04-R2): Horizontal Stabilizer Trim Actuator · Learjet 25, 25A, 25B and 1 more. Effective Apr 7, 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 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 78-20-12](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 76-18-07](https://openairdocs.org/ad/76-18-07): Inverter Input Power · Learjet 24, 25, 35 and 1 more. Effective Sep 10, 1976
- [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 72-15-03](https://openairdocs.org/ad/72-15-03): Spoiler Actuator Pivot Bolts · Learjet 24 and 25. Effective Sep 19, 1974
- [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

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) (3)

- [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

## Registered aircraft (1)

- [N564CL](https://openairdocs.org/aircraft/N564CL): [David Copperfield Project Magic Fund](https://openairdocs.org/faa-owner/DAVID%20COPPERFIELD%20PROJECT%20MAGIC%20FUND), [Las Vegas, NV](https://openairdocs.org/faa-place/NV/Las%20Vegas), built 1976, S/N 25-060

## NTSB investigations

None matched to aircraft with this model.

## FAA accident and incident reports (4)

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 20030817020429I](https://openairdocs.org/incident/20030817020429I), Aug 17, 2003: Lear 25 (N25FM), Groton - New Lo, CT. (-23) During takeoff roll on runway 05, at approximately 125KTS at 2500FT (runway mid point) aircraft struck several sea gulls at VI. Aircraft yawed right. PIC…
- [Incident 19990106014339I](https://openairdocs.org/incident/19990106014339I), Jan 6, 1999: Lear 25 (N25MD), Guthrie, TX. On January 06, 1999, N25MD, a Lear 25, enroute from maf to jln reported a left engine flame out at FL 410 over or near Guthrie, TX. At 2050 UTC, N25MD informed…
- [Incident 19900425020589I](https://openairdocs.org/incident/19900425020589I), Apr 25, 1990: Lear 25 (N564CL), Van Nuys, CA. On single engine approach instructor took over and made go around. Left wing tip tank hit runway.
- [Incident 19800518052729I](https://openairdocs.org/incident/19800518052729I), May 18, 1980: Lear 25 (N564CL), Van Nuys, CA, Minor damage. Nose steering malfunctioned on landing. Aircraft ran off runway.

## Service difficulty reports (71, newest 50)

As reported by operators and repair stations, by the model named in the report.

- [SDR HAEA201000213](https://openairdocs.org/sdr/HAEA201000213), Feb 1, 2010: INDICATOR. FAILED. CREW OBSERVED THE DME DISPLAY TO GO EXTREMELY BRIGHT FOLLOWED BY THE CIRCUIT BREAKER POPPING. CREW BRIEFLY NOTICED AN ELECTRICAL SMELL/SMOKE IN COCKPIT THAT WEN
- [SDR KC8AN76CK](https://openairdocs.org/sdr/KC8AN76CK), Jun 19, 2009: ENGINE. FLAMED OUT. LT ENGINE FLAMED OUT AT 40,000FT, DURING CRUISE IN TURBULENT AIR. PILOT DESCENDED TO A LOWER ALTITUDE AND PERFORMED A SUCCESSFUL RELIGHT OF THE ENGINE. NO ABNOR
- [SDR HAEA200800205A](https://openairdocs.org/sdr/HAEA200800205A), Nov 10, 2008: PUMP. FAILED. ENGINE RPM ROLLED BACK FL430 PLUS 30 MINUTES. AIRCRAFT DESCENDED TO FL 150 AND DIVERTED TO GSP. MAINTENANCE DISCOVERED ENGINE DRIVEN FUEL PUMP FAILED. REPLACED 
- [SDR N76CK80606](https://openairdocs.org/sdr/N76CK80606), Aug 6, 2006: ENGINE. FOD. CREW REPORTED RT FIRE WARNING LIGHT FLICKERING WHEN POWER LEVER WAS PULLED BACK TO THE IDLE POSITION. NO SECONDARY INDICATIONS NOTED. FOUND EXHAUST CASE LEAKING
- [SDR KC8A0608001](https://openairdocs.org/sdr/KC8A0608001), Aug 3, 2006: GASKET. BLOWN. PILOT REPORTED RT ENGINE FIRE WARNING LIGHT FLICKERING ON DESCENT WITH POWER LEVER REDUCED TO IDLE SPEED. FOUND EXHAUST CASE, CENTER BODY, UPPER RIGHT STRUT SUP
- [SDR HAEA200600191](https://openairdocs.org/sdr/HAEA200600191), Jun 27, 2006: ENGINE. POWER LOSS. AIRCRAFT ENCOUNTERED TURBULENCE AT FL430 AND RT ENGINE LOST POWER. AIRCRAFT DESCENDED AND ENGINE REGAINED POWER AT FL250. MAINTENANCE PERFORMED POST OPERATION I
- [SDR KC82005F00008](https://openairdocs.org/sdr/KC82005F00008), Nov 14, 2005: SERVO. DEFECTIVE. AFTER TAKEOFF, GEAR WAS SELECTED UP, NOSE STEERING SERVO DRIVE NOSE WHEEL 90 DEGREES. NOSE GEAR WOULD NOT RETRACT INTO THE WHEEL WELL. GEAR WAS SELECTED DOWN AN
- [SDR CED2006F00020](https://openairdocs.org/sdr/CED2006F00020), Oct 3, 2005: INDICATOR. DEFECTIVE. THE AIRCRAFT ABORTED TAKEOFF ROLL, THE NR 2 ENGINE WAS NOT MAKING TAKEOFF EPR. MAINTENANCE INSPECTED THE AIRCRAFT AND FOUND A DEFECTIVE EPR GAUGE. MAINTENANCE R
- [SDR CED2006F00018](https://openairdocs.org/sdr/CED2006F00018), Aug 21, 2005: INSULATOR. DIRTY. WHILE DESCENDING THROUGH FL 220 FOR APPROACH INTO AIRPORT, THE NR2 FIRE LIGHT CAME ON MOMENTARILY. IMMEDIATELY REDUCED THE RT THRUST LEVER TO IDLE. MAINTENANCE 
- [SDR CED2006F00010](https://openairdocs.org/sdr/CED2006F00010), Aug 21, 2005: ENGINE. MALFUNCTIONED. HAD TO ABORT THE TAKEOFF WHILE ATTEMPTING TO DEPART. THE REASON FOR THE ABORT WAS THAT THE NR 2 ENGINE WOULD NOT PRODUCE TAKEOFF FOR THE CONDITIONS. MAINTENANCE
- [SDR CED2006F00023](https://openairdocs.org/sdr/CED2006F00023), Jul 21, 2005: ENGINE. MALFUNCTIONED. ON TAKEOFF ROLL, THE NR 2 ENGINE WOULD NEVER PRODUCE TAKEOFF . THE CREW ABORTED TAKEOFF ROLL AND EXITED THE RUNWAY. MAINTENANCE INSPECTED THE AIRCRAFT AND FOUND
- [SDR 6242004N238CA](https://openairdocs.org/sdr/6242004N238CA), Jun 24, 2005: FIRE LOOP. OUT OF POSITION. ON DECENT, THE FLIGHT CREW RECEIVED INDICATION OF FIRE IN THE NR1 ENGINE. THE FLIGHT CREW PERFORMED THE CHECKLIST AND COULD NOT CANCEL THE FIRE LIGHT. THE FLIGH
- [SDR CED2006F00014](https://openairdocs.org/sdr/CED2006F00014), May 19, 2005: ELEMENT. FALSE INDICATION. AFTER TAKEOFF AT FLIGHT LEVEL 220, THE CREW OBSERVED A FIRE INDICATION LIGHT ON THE NR 1 ENGINE. THE FLIGHT CREW FOLLOWED STANDARD EMERGENCY PROCEDURES AND RETU
- [SDR KC82005F00003](https://openairdocs.org/sdr/KC82005F00003), Jan 24, 2005: SQUAT SWITCH. FAILED. AFTER TAKEOFF, THE LANDING GEAR FAILED TO RETRACT. PILOT RETURNED TO DEPARTURE. FOUND LT MAIN GEAR SQUAT SWITCH FROZEN AND THE INTERNAL MICRO SWITCHES REMAINED 
- [SDR CED2004F00002](https://openairdocs.org/sdr/CED2004F00002), May 19, 2004: FIRE DETECTOR. MALFUNCTIONED. AFTER TAKEOFF AT FLIGHT LEVEL 220 THE CREW OBSERVED A FIRE INDICATION LIGHT ON THE NR 1 ENGINE. THE FLIGHT CREW FOLLOWED STARNDARD EMERGENCY PROCEDURES AND RETU
- [SDR 00140](https://openairdocs.org/sdr/00140), May 14, 2004: ENGINE. FLAMED OUT. PILOT REPORTED LT ENGINE FLAMED OUT AT FL430 IN SEVERE TURBULANCE ON TRIP FROM HKS TO LRD. ENGINE RELET NORMALLY AT FL 250. CONTINUED TRIP TO LRD. MAINTENANCE P
- [SDR X5E2003F00000](https://openairdocs.org/sdr/X5E2003F00000), Sep 15, 2003: WINDSHIELD. FAILED. LEFT WINDSHIELD WAS REPLACED WITH A PMA PART ON 12/8/1999. ON 7/3/2001 A BLISTER/ BUBBLE HAD FORMED IN THE INNER PLY AND WAS POLISHED OUT BY THE WINDOW MANUFACT
- [SDR 9903N76CK](https://openairdocs.org/sdr/9903N76CK), Sep 10, 2003: STARTER GEN. VIBRATION. AIRCRAFT DEVELOPED VIBRATION. REPLACED LT STARTER GENERATOR WITH SERVICEABLE REPAIRED UNIT, GROUND OPERATIONAL CHECK GOOD. NO RECOMMENDATION FOR PREVENTION.
- [SDR 00111](https://openairdocs.org/sdr/00111), Sep 10, 2003: CONTROLLER. INOPERATIVE. PILOT REPORTED PRESSURIZATION PROBLEMS CABIN ALTITUDE INCREASING WITH ALTITUDE, RETURN TO DEPARTURE AIRPORT. WILL UPDATE REPORT AFTER MAINTENANCE. REMOVED AND R
- [SDR 00106](https://openairdocs.org/sdr/00106), Aug 25, 2003: TRANSDUCER. MALFUNCTIONED. PILOT REPORTED AT V1 NOSE OF AIRCRAFT OSCILATED UP AND DOWN, ABORTED TAKEOFF. AIRCRAFT WENT INTO OVERRUN AREA, NO DAMAGE TO AIRCRAFT OR AIRPORT. TAXIED BACK TO 
- [SDR 2003F00265](https://openairdocs.org/sdr/2003F00265), Mar 29, 2003: HOSE. DAMAGED. THE AIRCRAFT EXPERIENCED A FLAME OUT ON THE NR 1 ENGINE AT FL400. ENGINE RESTARTED AT FL250, THE AIRCRAFT ARRIVED IN PHX WITHOUT FURTHER INCIDENT. ENGINE INSPEC
- [SDR 00127](https://openairdocs.org/sdr/00127), Jan 7, 2003: GYRO. MALFUNCTIONED. PILOT REPORTED AFTER DEPARTING ADS THE CO-PILOTS HIS FLAGGED, RETURN TO ADS FOR MAINTENANCE, HEADING FLAG ON CO-PILOT HIS OPERATES NORMAL ,FOUND BAD CONNECTION 
- [SDR KC82002F00005](https://openairdocs.org/sdr/KC82002F00005), Oct 23, 2002: GASKET. MISINSTALLED. THE LEFT AIRCRAFT LOW PRESSURE FUEL LIGHT CAME ON AS THE ENGINES WERE POWERED UP. TROUBLE SHOT LEFT FUEL SYSTEM AND FOUND THAT THE LOW PRESSURE FUEL FILTER GASK
- [SDR EA11200202951](https://openairdocs.org/sdr/EA11200202951), Oct 22, 2002: INDICATOR. MALFUNCTIONED. RT THRUST REVERSER ILLUMINTED IN FLIGHT, SYSTEM OPERATED CORRECTLY IWA MFG MM. VISUAL INSPECTION REVEALED STICKY LATCHES AND DEFECTIVE T/R ACCUMULATOR. AWAITING
- [SDR ECA2002F00002](https://openairdocs.org/sdr/ECA2002F00002), Oct 1, 2002: ACCUMULATOR. LEAKING. RT THRUST REVERSER ARM LIGHT ILLUMINATED IN FLIGHT ON LEG NR 2. A/C RETURNED TO BASE. GROUND OPS CHECK WAS PERFORMED, SYSTEM WAS OPERATING CORRECTLY IAW MM. VIS
- [SDR CED2002F00000](https://openairdocs.org/sdr/CED2002F00000), Sep 5, 2002: REGULATOR. CRACKED. AIRCRAFT WAS ENROUTE, LOST HYDRAULIC PRESSURE. AIRCRAFT DIVERTED, MAINTENANCE FOUND HYDRAULIC PRESSURE REGULATOR LEAKING. THE VALVE BODY WAS CRACKED AT ONE OF T
- [SDR 00034](https://openairdocs.org/sdr/00034), Jul 11, 2002: ENGINE. FLAMED OUT. AIRCRAFT EN ROUTE FROM ADDISON TX TO WINDSOR CANADA RT ENGINE FLAME-OUT CLIMBING FROM 390 TO 410. RESTART NORMAL, CLIMB BACK TO 410 AND CONTINUED TRIP. PILOT IN
- [SDR 00029](https://openairdocs.org/sdr/00029), May 29, 2002: ENGINE. FLAMED OUT. ACFT ROUTE FROM FNT TO ADS CLIMBING THROUGH FL398 FOR FL430 RT ENGINE FLAME-OUT, REQUEST LOWER ALT FL260. ENGINE RESTARTED AND CLIMB BACK TO FL390 PROCEEDED TO 
- [SDR 00017](https://openairdocs.org/sdr/00017), Apr 19, 2002: SQUAT SWITCH. OUT OF ADJUST. AIRCRAFT DEPARTED YIP, SELECTED GEAR UP, MAIN GEAR DOOR RED LIGHTS STAYED ON. RETURNED TO DEPARTURE AIRPORT. MAINTENANCE FOUND RT SQUAT SWITCH OUT OF ADJUSTMENT
- [SDR ECA2002F00001](https://openairdocs.org/sdr/ECA2002F00001), Apr 1, 2002: SEAL. TORN. CABIN ALTITUDE REACHED 10,000 FT MAXIMUM AIRFLOW WAS APPLIED AND CABIN WAS RESTORED. DECENT FOLLOWED WITH FLOW ON UNTIL 1500 FT PRIOR TO LANDING. REQUIRED MAX A
- [SDR ECA2002F00000](https://openairdocs.org/sdr/ECA2002F00000), Apr 1, 2002: SEAL. TORN. CABIN ALTITUDE REACHED 10,000 FT MAX., AIRFLOW WAS APPLIED AND CABIN WAS RESTORED. DECENT FOLLOWED WITH FLOW ON UNTIL 1500 FT PRIOR TO LANDING. REQUIRED MAX AIR
- [SDR 8292001N39CK](https://openairdocs.org/sdr/8292001N39CK), Aug 31, 2001: SWITCH. FAILED. LANDING GEAR WOULD NOT RETRACT. AIRCRAFT RETURNED TO AIRPORT. UNEVENTFUL LANDING ACCOMPLISHED. REPLACED RIGHT MAIN GEAR TRUNNION SWITCH WITH NEW AND ADJUSTED IN
- [SDR BSY2001F00014](https://openairdocs.org/sdr/BSY2001F00014), Jul 19, 2001: ENGINE. FLAMED OUT. AIRCRAFT WAS AT FL 440 CLIMBING ABOVE SOME STORMS, RIGHT ENGINE FLAMED OUT DUE TO HEAVY TURBULENCE WHICH CAUSED INTERRUPTION OF AIR INTO INLET. AIRCRAFT DESCEND
- [SDR 60701N28CK](https://openairdocs.org/sdr/60701N28CK), Jun 8, 2001: SWITCH. DEFECTIVE. AIRCRAFT HYDRAULIC PRESSURE FLUCTUATES. FOUND RIGHT M.L.G. TRUNNION SWITCH OUT OF RIG CAUSING INBOARD GEAR DOORS TO CYCLE SEVERAL TIMES DURING RETRACTION. ADJUS
- [SDR 20010525CW003](https://openairdocs.org/sdr/20010525CW003), May 7, 2001: ENGINE. FLAMED OUT. RIGHT HAND ENGINE FLAMED OUT DURING MAX ACCELERATION CHECK. ENGINE WAS RESTARTED AND UNEVENTFUL LANDING ACCOMPLISHED. COMPLIED WITH LEARJET SSK959 REPLACEMENT O
- [SDR 2401N813JW](https://openairdocs.org/sdr/2401N813JW), Feb 6, 2001: SQUAT SWITCH. INOPERATIVE. LANDING GEAR WOULD NOT RETRAACT. AIRCRAFT RETURNED TO BASE. REPLACED RT SQUAT SWITCH WITH NEW. OPERATIONAL CHECK OF LANDING GEAR EXTENSION AND RETRACTION SYSTEM
- [SDR 20010312CW016](https://openairdocs.org/sdr/20010312CW016), Jan 24, 2001: CONNECTOR. DAMAGED. LANDING GEAR WOULD NOT EXTEND NORMALLY. PERFORMED EMERGENCY GEAR EXTENSION. UNEVENTFULL LANDING ACCOMPLISHED. REPLACED LOOSE SOCKET AT GEAR SELECTOR SWITCH CONN
- [SDR 20010112SG033](https://openairdocs.org/sdr/20010112SG033), Oct 31, 2000: ELEMENT. CHAFED. PILOT REPORTED RIGHT ENGINE FIRE LIGHT ILLUMINATED ON THE APPROACH TO FRG. INSPECTED AND TROUBLESHOT. FOUND FIRE LOOP ELEMENT ON THE RIGHT ENGINE CHAFING ON THE
- [SDR 20001025SH023](https://openairdocs.org/sdr/20001025SH023), Sep 25, 2000: EXCITER. FAILED. MWD - ON START, LEFT ENGINE WOULD NOT START. FOUND IGNITION EXCITER NOT FIRING TOP OR BOTTOM IGNITER PLUGS. (X)
- [SDR 99ZZZX4416](https://openairdocs.org/sdr/99ZZZX4416), Nov 18, 1999: ACTATOR. LEAKING. AIRCRAFT WAS ON FINAL APPROACH TO LAND WHEN GEAR WAS SELECTED DOWN. CREW REALIZED NO HYDRAULIC PRESSURE. DECLARED AN EMERGENCY. BLEW THE GEAR DOWN. LANDED WITHO
- [SDR 99ZZZX4247](https://openairdocs.org/sdr/99ZZZX4247), Oct 30, 1999: ENGINE. FLAMED OUT. DURING CLIMB-OUT, THE LEFT ENGINE EXPERIENCED A FLAME OUT. THE FLIGHT CREW SAID THEY HEARD A POP AND EXPERIENCED ENGINE INDICATIONS ON THE LEFT ENGINE ROLL BACK
- [SDR 99ZZZX3511](https://openairdocs.org/sdr/99ZZZX3511), Aug 23, 1999: TIRE. FAILED. THREE MAIN WHEEL TIRES BLEW ON LANDING. REPLACED ALL MAIN WHEEL AND BRAKE ASSEMBLIES WITH SERVICEABLE UNITS. FUNCTIONAL CHECK OF ANTI-SKID SYSTEM AND PARKING BR
- [SDR 99ZZZX3059](https://openairdocs.org/sdr/99ZZZX3059), Jul 23, 1999: BRACKET. DAMAGED. NOSE WHEEL UNSAFE LIGHT REMAINED ILLUMINATED AFTER LANDING GEAR WAS SECURED UP. AIRCRAFT RETURNED TO FRG. LANDING GEAR SELECTED DOWN AND SHOWED SAFE. AIRCRAFT M
- [SDR 99ZZZX2967](https://openairdocs.org/sdr/99ZZZX2967), Jul 22, 1999: ACTUATOR. LEAKING. AIRCRAFT LOST HYDRAULIC PRESSURE. RIGHT HAND INBOARD GEAR DOOR ACTUATOR LEAKING HYDRAULIC FLUID. REPLACED RIGHT INBOARD GEAR DOOR ACTUATOR WITH SERVICEABLE UNIT
- [SDR 99ZZZX2269](https://openairdocs.org/sdr/99ZZZX2269), May 14, 1999: BRAKE. FAILED. ANTI-SKID FAILED TO CYCLE ON TOUCH DOWN. REPLACED ALL MAIN WHEEL AND BRAKE ASSEMBLIES WITH SERVICEABLE UNITS. REPLACED THE ANTI-SKID TRANSDUCERS WITH SERVICEABL
- [SDR 99ZZZX1360](https://openairdocs.org/sdr/99ZZZX1360), Mar 1, 1999: O RING. LEAKING. WHILE EN ROUTE, FLIGHT CREW NOTICED LT RPM FLUCTUATION. ADJUSTMENT OF POWER LEVER ONLY REDUCED RPM. ENGINE POWER WAS LOST. CREW ELECTED TO DIVERT TO TYS AND AN 
- [SDR 99ZZZM131](https://openairdocs.org/sdr/99ZZZM131), Jan 3, 1999: BLOWER. FAILED. AFTER DEPARTURE FROM BCT, CREW NOTICED ELECTRICAL BURNING ODOR IN COCKPIT/CABIN. DIVERTED TO FXE. FOUND COCKPIT AIRCONDITIONING BLOWER FAN DISTORTED AND JAMMED 
- [SDR 98ZZZX4619](https://openairdocs.org/sdr/98ZZZX4619), Nov 10, 1998: SEAL. DAMAGED. WHILE EN ROUTE TO YIPSILANTI, THE RT OIL PRESSURE WAS DECREASING FOLLOWED BY RT GENERATOR FAILURE. A PRECAUTIONARY ENGINE SHUT DOWN WAS MADE AND AIRCRAFT DIVERT
- [SDR 99ZZZX784](https://openairdocs.org/sdr/99ZZZX784), Nov 5, 1998: BATTERY PACK. DISCHARGED. EMERGENCY BATTERY PACK DISCHARGED.
- [SDR 98ZZZM906](https://openairdocs.org/sdr/98ZZZM906), Oct 17, 1998: IGNITOR BOX. FAILED. RIGHT ENGINE FLAMED OUT AT FL 400, DESCENDED BELOW FL 250, ATTEMPTED RESTART 3 TIMES, SECURED ENGINE LANDED ILM. FOUND IGNITOR BOX. INOP, REPLACED IGNITOR BOX G

All 71: https://openairdocs.org/model/gates-lear-jet-25/reports.md

## STCs that may be installed (OpenAirDocs) (110, 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 ST01308WI](https://openairdocs.org/stc/ST01308WI): Installation of L-3 Communications Avionics Systems Inc. (Landmark) Terrain Awareness Warning System (TAWS) model TAWS8100. Acron Aviation Inc
- [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 ST04728NY](https://openairdocs.org/stc/ST04728NY): Installation of LAI CoolView Cabin Window. Lee Aerospace 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 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 ST04575AT](https://openairdocs.org/stc/ST04575AT): Installation of the Rockwell Collins ALT-1000+/ -4000+ with 5G Filtering. Chippewa Aerospace Inc
- [STC SA01858AT-D](https://openairdocs.org/stc/SA01858AT-D): Installation of a BF Goodrich Avionics Systems, Inc. TCAS791/A TCAS I system. Summit Aviation Inc
- [STC ST01682WI](https://openairdocs.org/stc/ST01682WI): Installation of Heads Up Technologies (HUT) Cabin Entertainment System (CES). Heads Up Technologies Inc
- [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 ST00790DE](https://openairdocs.org/stc/ST00790DE): Installation of BendixKing CAS 67B Traffic Alert and Collision Avoidance System (TCAS) II Version 7.1. Peregrine
- [STC ST02636LA](https://openairdocs.org/stc/ST02636LA): Modification to upgrade the existing XS-950 Mode S Transponder system to add ADS-B Out. Aviation Communication and Surveillance Systems (ACSS) LLC
- [STC ST00347BO](https://openairdocs.org/stc/ST00347BO): Modification to upgrade a BendixKing CAS 67A TCAS II system to CAS 67B TCAS II Change 7.1. Pro Star Aviation, LLC
- [STC ST00373BO](https://openairdocs.org/stc/ST00373BO): Installation of Rockwell Collins TDR-94D Transponders with ADS-B Out. Pro Star Aviation, LLC
- [STC ST00226BO](https://openairdocs.org/stc/ST00226BO): Installation of Honeywell CAS-67A Airborne Collision Avoidance System (ACAS II) with dual MST-67A Mode S Transponders and copilot's Intercontinental Dynamics Corporation encoding altimeter with Static Defect Correction Module. Pro Star Aviation, LLC
- [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 ST02632LA](https://openairdocs.org/stc/ST02632LA): Modification to replace the existing Mode S Transponder system with ACSS NXT-700 Mode S Transponder with ADS-B Out and optionally install ACSS NXG-900 GPS as a position source for ADS-B Out. Aviation Communications and Surveillance Systems
- [STC ST02609LA](https://openairdocs.org/stc/ST02609LA): Modification to replace the existing Mode S Transponder system with ACSS NXT-700 Mode S Transponder with ADS-B Out. Aviation Communication and Surveillance Systems (ACSS) LLC
- [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 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 ST04238AT](https://openairdocs.org/stc/ST04238AT): Upgrade of Honeywell Traffic Collision Avoidance Systems II (TCAS II) Processor Software from TCAS II Version 7.0 to TCAS II Version 7.1. Aviation Partners Group Inc
- [STC ST01783WI](https://openairdocs.org/stc/ST01783WI): Installation of Internal Wing Hardpoints. Avcon Industries Inc
- [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

All 110: https://openairdocs.org/model/gates-lear-jet-25/stcs.md

## The same model under other registry codes

Amateur-built copies and renamed makers get their own codes.

- [Learjet 25](https://openairdocs.org/model/learjet-25): 2 registered aircraft, registry code 5170506
- [Air & Space America 25](https://openairdocs.org/model/air-space-america-25): 0 registered aircraft, registry code 0440105
- [White L J 25](https://openairdocs.org/model/white-l-j-25): 0 registered aircraft, registry code 05634XU
- [Skyways Air Transportation 2.5](https://openairdocs.org/model/skyways-air-transportation-2-5): 0 registered aircraft, registry code 0610197

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