# Service difficulty reports: Gates Learjet 24

A list on [Gates Learjet 24](https://openairdocs.org/model/gates-learjet-24.md).

Newest first. General aviation reporting is voluntary.

- [SDR HAEA200900211](https://openairdocs.org/sdr/HAEA200900211.md): Pump · failed · Oct 2, 2009 · N277TW · Lear 24 · Hydraulic Pump (Electric/Engine), Main
  > ON DESCENT, ACFT HYD PRESSURE GAUGE READ ZERO. LANDING GEAR EXTENDED MANUALLY. ACFT LANDED NORMALLY. MX REPLACED NR1 AND NR2 ENGINE DRIVEN HYD PUMP. OPS CHECK GOOD AFTER MX. [CLOSED]
- [SDR HAEA200900208](https://openairdocs.org/sdr/HAEA200900208.md): Housing · cracked · Feb 19, 2009 · N237TW · Lear 24 · Brake
  > ACFT LOST MAIN HYD PRESSURE DURING DECENT INTO 'FAR'. ON LANDING ROLL OUT DEPLOYED DRAG CHUTE AND ACTIVATED EMERGENCY BRAKE. MX DISCOVERED THE NR 3 BRAKE HSG CRACKED RESULTING IN FLUID LOSS. DRAG CHUTE REPACKED, HYD RESERVOIR SERVICED, BRAKE CHANGED AND LEAK C
- [SDR 2008FA0000157](https://openairdocs.org/sdr/2008FA0000157.md): Yaw Damper · faulty · Jan 8, 2008 · N989TL · Lear 24 · Autopilot System
  > THIS PART FAILED TO OPERATE DURING FIRST FLIGHT AFTER INSTALLATION AT CRUISE.
- [SDR 2008FA0000101](https://openairdocs.org/sdr/2008FA0000101.md): Yaw Damper · faulty · Jan 8, 2008 · N989TL · Lear 24 · Autopilot System
  > THIS PART FAILED TO OPERATE DURING FIRST FLIGHT, AFTER INSTALLATION, AT CRUISE.
- [SDR HAEA200600194](https://openairdocs.org/sdr/HAEA200600194.md): Engine · flamed out · Sep 22, 2006 · N333TW · Lear 24 · Engine (Turbine/Turboprop)
  > RT ENGINE FLAMED OUT ON DESCENT INTO YIP. PILOT REPORTED THAT THE RT ENGINE THROTTLE WAS RETARDED TO LOWER THAN NORMAL IDLE. ENGINE RELIGHT WAS ACCOMPLISHED. AIRCRAFT CONTINUED DESCENT INTO YIP LANDING NORMAL. MAINTENANCE PERFORMED PROCEDURES CONTAINED IN
- [SDR HAEA200600192](https://openairdocs.org/sdr/HAEA200600192.md): Motor · failed · Aug 29, 2006 · N233TW · Lear 24 · Air Distribution Fan
  > AIRCRAFT DEPARTED AND NOTICED SMOKE IN THE COCKPIT. AIRCRAFT RETURNED, UNEVENTFUL. COMPANY MAINTENANCE ENROUTE. THE SOURCE OF THE SMOKE SEEMED TO BE THE AFT CABIN. AIRCRAFT RETURNED BTL, UNEVENTFUL. COMPANY MAINTENANCE ENROUTE. MAINTENANCE DISCOVERED THAT THE
- [SDR HAEA200400157](https://openairdocs.org/sdr/HAEA200400157.md): Anti-Skid Sys · faulty · Jul 14, 2004 · N222TW · Lear 24 · Brake Anti-Skid Section
  > ON LANDING YIP, PILOT REPORTED AIRCRAFT BEGAN TO SLIGHTLY VEER TO THE RIGHT. CREW APPLIED FULL FLIGHT CONTROL DEFLECTION IN AN ATTEMPT TO COUNTER ACT ANY CROSSWIND COMPONENT. CAPTAIN APPLIED ASYMMETRICAL BRAKING (MORE LEFT THAN RIGHT). AIRCRAFT CONTINUED TO
- [SDR W322004F00001](https://openairdocs.org/sdr/W322004F00001.md): Brake Assy · cracked · May 19, 2004 · N39EL · Lear 24 · Landing Gear Brake System
  > AIRCRAFT REPORTED LOSS OF HYDRAULIC PRESSURE AFTER FAILURE OF FLAPS TO DEPLOY. UPON INITIAL INSPECTION, HYDRAULIC FLUID WAS FOUND FLOWING FROM LT BRAKE ASSEMBLY. UPON REMOVAL FROM AIRCRAFT, BOTH BRAKE ASSEMBLIES WERE FOUND TO BE CRACKED IN IDENTICAL LOCATION
- [SDR 00137](https://openairdocs.org/sdr/00137.md): Connector · faulty · May 6, 2004 · N333TW · Lear 24 · Electrical Connectors
  > PILOT REPORTED RIGHT THRUST REVERSER UNSAFE LIGHT ILLUMINATED DURING DESCENT. PER CHECKLIST ENGINE SHUT DOWN AND EXECUTED AN UNEVENTFUL LANDING IN LRD. REPLACED CONNECTOR, OPS CHECKED GOOD.
- [SDR 00116](https://openairdocs.org/sdr/00116.md): Engine · flamed out · Oct 7, 2003 · N222TW · Lear 24 · Engine (Turbine/Turboprop)
  > PILOT REPORTED LT ENGINE FLAMMED OUT WHILE CLIMBING FROM FL420 TO FL430, DECENT TO RELIGHT ALTITUDE, RELIGHT NORMAL AND CONTINUED TO DESTINATION. WILL UPDATE AFTER MAINTENANCE.NO DEFECTS NOTED.
- [SDR X5C2003F00000](https://openairdocs.org/sdr/X5C2003F00000.md): Filter Element · dirty · Jan 31, 2003 · N991TD · Lear 24 · Aircraft Fuel Filter/Strainer
  > DURING SCHEDULED MAINTNANCE, REPLACED MAIN FUEL FILTERS WITH ELEMENTS. EXPERENCED LOW FUEL PRESSURE LIGHT AT HIGH ENGINE POWER SETTINGS WITH JET PUMP OPERATION. LIGHT AT HIGH ENGINE POWER SETTINGS JET PUMP OPERATION. LIGHT WOULD EXTINGUISH WITH STANDBY BOOS
- [SDR 00068](https://openairdocs.org/sdr/00068.md): Switch · out of adjust · Dec 6, 2002 · N157TW · Lear 24 · Landing Gear Position and Warning
  > PILOT REPORTED 3 RED LIGHTS (DOOR LIGHTS) AFTER DEPARTURE FROM YIP AND RETURNED TO YIP. MAINTENANCE JACKED AND SWUNG GEAR OPS CK GOOD. AIRCRAFT DEPARTED YIP WITH SAME PROBLEM AND RETURNED. AIRCRAFT JACKED AND GEAR SWING PERFORMED POSITION OF ALL SWITCHES CK
- [SDR 00063](https://openairdocs.org/sdr/00063.md): Indicator · malfunctioned · Nov 18, 2002 · N157TW · Lear 24 · Landing Gear Position and Warning
  > AIRCRAFT DEPARTED, GEAR UNSAFE LIGHTS DID NOT GO OUT, AIRCRAFT RETURNED FOR UNEVENTFUL LANDING. AIRCRAFT FERRIED, DIRECT GEAR DOWN AND LOCKED FOR MAINTENANCE. WILL UPDATE AFTER MAINTENANCE.
- [SDR X5C2002F00001](https://openairdocs.org/sdr/X5C2002F00001.md): O-Ring · failed · Oct 17, 2002 · N995TD · Lear 24 · Landing Gear Actuator
  > LOW HYDRAULIC PRESSURE DURING LANDING APPROACH. REPLACED O-RING AT LEFT MAIN LANDING GEAR ACTUATOR FITTING, OPS CHECK GOOD.
- [SDR X5C2002F00000](https://openairdocs.org/sdr/X5C2002F00000.md): O-Ring · nicked · Oct 17, 2002 · N995TD · Lear 24 · Landing Gear Actuator
  > LOW HYDRAULIC PRESSURE ON APPROACH, AIRCRAFT RETURNED, MAINTENANCE BASE. FOUND HYDRAULIC LEAK AT LT MAIN GEAR ACTUATOR FITTING, HYDRAULIC FLUID LEVEL LOW. LEAK CAUSED BY NICKED O-RING. REPLACED O-RING, SERVICED HYDRAULIC SYSTEM, OPERATIONAL CHECKED SPOILER,
- [SDR ESUA116380](https://openairdocs.org/sdr/ESUA116380.md): Access Panel · departed · Sep 14, 2002 · N105GA · Lear 24 · Service Doors
  > AFTER DEPARTURE, PASSING THROUGH 13000 FEET, PILOT HEARD A LOUD BANG FOLLOWED BY A NOTICEABLE VIBRATION. PILOT DECLARED AN EMERGENCY, RETURNED TO AIRPORT. MAINTENANCE WAS CALL TO INVESTIGATE THE PROBLEM. IT WAS DISCOVERED THAT THE OXYGEN SERVICE DOOR ON TH
- [SDR 090214](https://openairdocs.org/sdr/090214.md): Door · open · Sep 14, 2002 · N105GA · Lear 24 · Service Doors
  > AFTER DEPARTURE FOR CYVR, PASSING THROUGH 13000 FEET PILOT HEARD A LOUD BANG FOLLOWED BY A NOTICEABLE VIBRATION. PILOT DECLARED AN EMERGENCY, TO RETURN TO CYVR. MAINTENANCE WAS CALL TO INVESTIGATE THE PROBLEM. IT WAS DISCOVERED THAT THE OXYGEN SERVICE DOOR ON
- [SDR HAEA00040](https://openairdocs.org/sdr/HAEA00040.md): Static Line · kinked · Sep 6, 2002 · N222TW · Lear 24 · Pitot/Static System
  > AIRCRAFT DEPARTED KYIP CLIMBING THROUGH 2,000 FT ALTIMETER PILOT SIDE LOCKED UP. RETURNED TO DEPARTURE AIRPORT FOR MAINTENANCE. FOUND STATIC LINE KINKED, REPAIRED AND AIRCRAFT RETURNED TO SERVICE.
- [SDR 00012](https://openairdocs.org/sdr/00012.md): Warning System · false indication · Feb 12, 2002 · N157TW · Lear 24 · Landing Gear Position and Warning
  > LANDING GEAR UNSAFE LIGHT RETURNED TO DEPARTURE AIRPORT FOR MAINTENANCE. MAINTENANCE SWUNG GEAR, FOUND NO DISCREPANCIES. AIRCRAFT RETURNED TO SERVICE.
- [SDR 00011](https://openairdocs.org/sdr/00011.md): Fastener · missing · Jan 24, 2002 · N333TW · Lear 24 · Fasteners
  > LANDING GEAR WOULD NOT RETRACT, OBTAINED FERRY PERMIT TO RELOCATE AIRCRAFT TO ADS. MAINTENANCE FOUND LT GEAR SQUAT SWITCH HARDWARE MISSING. REPLACED AND REPAIRED, OP'S CHECK IAW LEAR 24MM.
- [SDR HAEA200100002](https://openairdocs.org/sdr/HAEA200100002.md): Fcu · out of adj · Oct 5, 2001 · N333TW · Lear 24 · Fuel Control/Turbine Engines
  > AIRCRAFT WAS CLIMBING FROM 390 TO 410 AT 410 RIGHT ENGINE FLAMED OUT. DESCEND TO 240, PERFORMED SUCCESSFUL RELIGHT AND CLIMB BACK TO 390. DENSITY SETTING CHANGED ON FUEL CONTROL BY MAINTENANCE. ALL FLAME-OUT CKS PERFORMED IAW GE MM'S.
- [SDR 00002](https://openairdocs.org/sdr/00002.md): Fcu · out of adj · Oct 4, 2001 · N333TW · Lear 24 · Fuel Control/Turbine Engines
  > RIGHT ENGINE FLAME-OUT DURING CLIMB FROM 390 TO 410. RESTART AT 240 CLIMB BACK TO 390, NO FURTHER PROBLEM. MAINTENANCE PERFORMED DENSITY ADJUSTMENT.
- [SDR 2001F00736](https://openairdocs.org/sdr/2001F00736.md): Switch · failed · Oct 3, 2001 · N993TD · Lear 24 · Landing Gear Position and Warning
  > ON FINAL APPROACH INTO JVL, LANDING GEAR FAILED TO EXTEND NORMALLY. LANDING WAS ASSURED AFTER SUCCESSFUL ALTERNATE GEAR EXTENSION. PROBLEM WAS NORMAL SWITCH WEAR, GEAR OPERATION NORMAL AFTER SWITCH REPLACEMENT PER LEAR M/M. (M)
- [SDR 20010411CW006](https://openairdocs.org/sdr/20010411CW006.md): Control Cable · binding · Mar 21, 2001 · N241JA · Lear 24 · Power Lever
  > LT THROTTLE BINDING WHEN ADVANCED FOR TAKEOFF POWER. FOUND BINDING OF LEFT AFT ENGINE THROTTLE CONTROL DUE TO POSSIBLE EXCESSIVE ROUTING OF CONTROL TO CONFORM TO NACELLE SIZE. REROUTED CONTROL TO INCREASE RADIUS OF BEND INSIDE NACELLE AND CONTROL OPERATED NOR
- [SDR 31101147KH](https://openairdocs.org/sdr/31101147KH.md): Wire · shorted · Mar 16, 2001 · N147KH · Lear 24 · Auto Flight System Wiring
  > SHORTLY AFTER DEPARTURE, FLIGHT CREW NOTED A PUSH FORWARD ON THE YOKE. AIRCRAFT RETURNED TO AIRPORT AND LANDED. MAINTENANCE PERSONNEL DISCOVERED A WIRE CHAFFED AND SHORTED TO GROUND GOING TO THE PITCH DISCONNECT BOX. WIRING WAS REPAIRED AND SYSTEM TESTED EX
- [SDR 20010327CW014](https://openairdocs.org/sdr/20010327CW014.md): Check Valve · failed · Feb 1, 2001 · N241JA · Lear 24 · Cabin Pressure Control System
  > CABIN COULD NOT MAINTAIN PRESSURIZATION AT FL350, MAINTENANCE PERFORMED A GROUND PRESSURIZATION FUNCTIONAL CHECK NORMALLY. A PNEUMATIC CHECK VALVE DISCOVERED WITH BROKEN SPRING WAS REPLACED, HOWEVER, INITIAL FLIGHT TEST WAS NOT SUCCESSFUL. MAINTENANCE TROUBL
- [SDR 20010213CW009](https://openairdocs.org/sdr/20010213CW009.md): Control Unit · malfunctioned · Jan 10, 2001 · N241JA · Lear 24 · Cabin Pressure Control System
  > AC COULD NOT MAINTAIN PRESSURIZATION AND INCREASE IN CABIN ALTITUDE RESULTED IN OXYGEN MASK DROP AND AURAL WARNINGS, AS APPROPRIATE. AC DESCENDED TO FL220 AND CREW WAS ABLE TO MANUALLY RESTORE CABIN ALTITUDE TO NORMAL. AC CONTINUED FLT TO HOME BASE, NORMALLY
- [SDR 20010213CW008](https://openairdocs.org/sdr/20010213CW008.md): Indicator · inoperative · Jan 5, 2001 · N241JA · Lear 24 · Engine Oil Pressure
  > LEFT ENGINE OIL PRESSURE GAGE NOTED TO HAVE DROPPED AND STUCK AT 12 PSI, OIL PRESSURE ON TAXI FOR TAKEOFF. AC WAS RETURNED TO MAINTENANCE AND A SERVICEABLE OIL PRESSURE INDICATOR WAS INSTALLED. OIL PRESSURE INDICATED NORMAL ON RUNUP/FUNCTIONAL CHECK.
- [SDR 20001027SH002](https://openairdocs.org/sdr/20001027SH002.md): Tire · failed · Mar 8, 2000 · N241JA · Lear 24 · Tire
  > AIRCRAFT HAD 2 FLAT TIRES AFTER LANDING. ANTI-SKID SYSTEM WAS NON-OPERATIONAL (DEFERRED STATUS) AND POSSIBLE POOR RUNWAY BRAKING CAUSE OF TIRE FAILURE. TIRE AND WHEEL ASSYS (4 EACH) WERE REPLACED. AIRCRAFT RETURNED TO BASE MAINTENANCE AND MADE NORMAL LANDIN
- [SDR 99ZZZX485](https://openairdocs.org/sdr/99ZZZX485.md): Fuel Control · malfunctioned · Jan 8, 1999 · N63CK · Lear 24 · Fuel Control/Turbine Engines
  > LEFT ENGINE COMPRESSOR STALLNG FROM ROTATION TO 2,000 FEET. REPLACED LEFT FUEL CONTROL UNIT. GROUND RUN, LEAK CHECKED, AND TEST FLEW AIRCRAFT, OPS CHECKED GOOD. NO RECOMMENDATIONS TO PREVENT RECURRENCE.
- [SDR 98ZZZX3627](https://openairdocs.org/sdr/98ZZZX3627.md): Pump · failed · Aug 12, 1998 · N45ED · Lear 24 · Hydraulic Pump (Electric/Engine), Main
  > APPROVED AIRCRAFT ACCESSORIES INC., CRS US2R225L OVERHAULED HYDRAULIC PUMP. WHEN INSTALLED, PUMP WOULD NOT PICK UP PRESSURE. BLED PUMP WITH NO RESULTS. WHEN THE PUMP WAS REMOVED, NOTED THE SNAP-RING IN THE BASE OF THE PUMP HAD COME OUT. THE INSIDE OF THE P
- [SDR 99ZZZX5](https://openairdocs.org/sdr/99ZZZX5.md): Stringer · cracked · Jun 22, 1998 · N241JA · Lear 24 · Horizontal Stabilizer Structure
  > DISCOVERED SEVERAL SMALL CRACKS INSIDE HORIZONTAL STABILIZER LOCATED AT LEFT AND RIGHT BL 19.40. CRACKS WERE NOTED DURING SCHEDULED INSPECTION OF THE AREA. A REPAIR WAS PERFORMED BY AN FAA CERTIFIED REPAIR STATION, FOLLOWING N.D.T. CONFIRMATION OF THE CRACKS
- [SDR 97ZZZX3178](https://openairdocs.org/sdr/97ZZZX3178.md): Skin · corroded · May 5, 1997 · N777MR · Lear 24 · Fuselage Main, Plate/Skin
  > SEVERE CORROSION IN SKIN PANEL AT RIGHT HAND AFT FUSELAGE BETWEEN FRAMES 23 AQND 26 IN AN AREA BELOW ENGINE PYLON. CORROSION POSSIBLY DUE TO TRAPPED MOISTURE IN FOAM INSULATION BETWEEN FUSELAGE FUEL TANK AND STRUCTURE. REPLACED SKIN BETWEEN FRAME 23 AND 26,
- [SDR 12196825AA](https://openairdocs.org/sdr/12196825AA.md): Switch · malfunction · Dec 2, 1996 · N825AA · Lear 24 · Landing Gear Position and Warning
  > LEFT LANDING GEAR DOWN LIGHT INTERMITTENT. COULD NOT DUPLICATE DISCREPANCY. REPLACED LEFT MAIN GEAR DOWN AND LOCK WITH NEW AS A PRECAUTIONARY MEASURE. ADJUSTED AND SWUNG GEAR. CHECKED GOOD. ALL WORK DONE IAW LEAR 24 MM. (X)
- [SDR 96ZZZX6173](https://openairdocs.org/sdr/96ZZZX6173.md): Tailpipe · cracked · Nov 12, 1996 · N555LB · Lear 24 · Engine Collector/Tailpipe/Nozzle
  > LT FIRE LIGHT ILLUMINATED AT ALTITUDE. REPLACED CRACKED TAIL PIPE WITH SERVICEABLE UNIT.
- [SDR 96ZZZX397](https://openairdocs.org/sdr/96ZZZX397.md): Strut · groove failed · Jan 5, 1996 · N710TV · Lear 24 · Main Landing Gear Strut/Axle/Truck
  > LEFT LANDING GEAR STRUT SNAP-RING GROOVE FAILED. SUSPECT CAUSE - EXTREME ROUGHNESS ON RUNWAY.
- [SDR 1239563CK](https://openairdocs.org/sdr/1239563CK.md): O-Ring · leak · Dec 6, 1995 · N63CK · Lear 24 · Landing Gear Actuator
  > ON APPROACH TO LANDING, HYDRAULIC PRESSURE WAS NOTED TO BE ZERO. LANDING GEAR WAS EXTENDED USING EMERGENCY AIR SYSTEM AND A NORMAL LANDING WAS MADE. EXAMINATION REVEALED A O-RING RETAINING JAMB NUT ON THE MAIN GEAR ACTUATOR HAD BACKED OFF CAUSING A HYDRAULIC
- [SDR 95ZZZX4076](https://openairdocs.org/sdr/95ZZZX4076.md): Battery · overheat · Jul 24, 1995 · N555LB · Lear 24 · Battery/Charger System
  > BATTERY 140 DEGREES AND 160 DEGREES WARNING LIGHT ILLUMINATED. UNEVENTFUL LANDING ACCOMPLISHED. REPLACED NR 2 BATTERY WITH SERVICEABLE UNIT.
- [SDR 95ZZZX2825](https://openairdocs.org/sdr/95ZZZX2825.md): Actuator · o-ring failed · May 12, 1995 · N63CK · Lear 24 · Landing Gear Actuator
  > HYDRAULIC SYSTEM PRESSURE WENT TO ZERO. UNEVENTFUL LANDING ACCOMPLISHED. O-RING LT MAIN GEAR ACTUATOR LEAKING. INSTALLED NEW O-RING, LANDING GEAR HYDRAULIC RESERVOIR SERVICED AND GEAR FUNCTIONALLY CHECKED PER LEAR MM. O-RING PN MS287786. OPER CONTROL NR 5
- [SDR 95ZZZX1143](https://openairdocs.org/sdr/95ZZZX1143.md): Follow Up · defective · Feb 10, 1995 · N124JL · Lear 24 · Landing Gear Steering System
  > AIRCAFT TT 11,018.1 HRS, LANDINGS 10,996. FOUND NOSE STRUT UNDER-INFLATED AND NOSE STEERING DOES NOT CENTER. AFTER TAKEOFF, HAD 'UNSAFE GEAR' LIGHT ON NOSE GEAR. REPLACED THE BAD NOSE STEERING FOLLOW-UP WITH O/H PART, AND NOSE STEERING PRINTED CIRCUIT BOARD
- [SDR 95ZZZX1142](https://openairdocs.org/sdr/95ZZZX1142.md): Pc Board · defective · Feb 10, 1995 · N124JL · Lear 24 · Landing Gear Steering System
  > AIRCAFT TT 11,018.1 HRS, LANDINGS 10,996. FOUND NOSE STRUT UNDER-INFLATED AND NOSE STEERING DOES NOT CENTER. AFTER TAKEOFF, HAD 'UNSAFE GEAR' LIGHT ON NOSE GEAR. REPLACED THE BAD NOSE STEERING, FOLLOW-UP WITH O/H PART, AND NOSE STEERING PRINTED CIRCUIT BOAR
- [SDR 95ZZZX675](https://openairdocs.org/sdr/95ZZZX675.md): Tube · failed · Jan 23, 1995 · N72FP · Lear 24 · Engine Fuel Distribution
  > AIRCRAFT AT LEVEL FLIGHT 41,000 FEET WHEN ENGINE SUDDENLY FLAMED OUT. PILOT REQUESTED DESCENT AND WAS GRANTED. PILOT ATTEMPTED RELIGHT SEVERAL TIMES, UNSUCCESSFUL. PILOT LANDED FIRST AVAILABLE AIRPORT. UNCOWLING OF ENGINE, FOUND SMALL 90 DEGREE FUEL TUBE L

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
SELECT sdr_id, difficulty_date, n_number, aircraft_make, aircraft_model, part_name, part_condition, jasc_code, discrepancy
FROM 'https://openairdocs.org/data/latest/faa_service_difficulty_report.parquet'
WHERE aircraft_model_key = '24'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/model/gates-learjet-24/reports

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