# Service difficulty reports: Air Tractor AT-301

A list on [Air Tractor AT-301](https://openairdocs.org/model/air-tractor-at-301.md).

Newest first. General aviation reporting is voluntary.

- [SDR FQWG2014082200494](https://openairdocs.org/sdr/FQWG2014082200494.md): Engine · power loss · Jul 28, 2014 · N8593S · Airtrc AT301 · Engine (Reciprocating)
  > DURING PESTICIDE APPLICATION, THE ENGINE STARTED LOOSING POWER AND RUNNING ROUGH. UNABLE TO MAINTAIN FLIGHT.
- [SDR 2SEG2014FA0000408](https://openairdocs.org/sdr/2SEG2014FA0000408.md): Bolt · broken · Jun 27, 2014 · N8564S · Airtrc AT301 · Main Landing Gear
  > DURING A TAKEOFF ROLL, PILOT HEARD A POP AND THE ACFT PULLED HARD TO THE LT AND LEFT THE RUNWAY AND ENDED UPSIDE DOWN. THE LEFT MLG FORWARDED ATTACH BOLT BROKE AND ALLOWED THE LT MLG TO COME LOOSE AND CAUSED THE LEFT "PULL" OF THE ACFT. THIS BOLT ACCORDING T
- [SDR 2014FA0000023](https://openairdocs.org/sdr/2014FA0000023.md): Bearing · failed · Apr 24, 2013 · N23416 · Airtrc AT301 · Reciprocating Engine Supercharger
  > SUPERCHARGER BLOWER AFT BEARING FAILURE DURING TAKEOFF.
- [SDR 2011FA0000567](https://openairdocs.org/sdr/2011FA0000567.md): Engine · power loss · Aug 4, 2011 · N4345S · Airtrc AT301 · Engine (Reciprocating)
  > TOTAL LOSS OF POWER ON TAKEOFF. 500 HOURS SINCE O/H.
- [SDR 2010FA0000341](https://openairdocs.org/sdr/2010FA0000341.md): Isolator · split · Apr 14, 2010 · N3370 · Airtrc AT301 · Engine Mount Section
  > ENGINE ISOLATOR MOUNTS PN 22387 WERE REPLACED WHEN ACFT RESTORED. FIRST ANNUAL AFTER INSTALLATION WITH APPROX 60 HRS TIS MOUNTS SHOWED EXCESSIVE CRACKING AND DETERIORATION REQUIRING REPLACEMENT. LOWER MOUNTS SHOWED THE MOST AMOUNT OF WEAR WITH THE AREA AROUND
- [SDR 2009FA0000197](https://openairdocs.org/sdr/2009FA0000197.md): Shaft · sheared · Mar 9, 2009 · N3170C · Airtrc AT301 · Propeller Blade Section
  > AT THE TRANSITION FROM DECENT TO LEVEL FLIGHT ON A SEEDING PASS, PROP RPM WAS INCREASED AND A VIBRATION WAS FELT. AS THE THROTTLE WAS ADVANCED THE VIBRATION INCREASED DRAMATICALLY. THE ACFT WAS FORCED TO LAND AND AT LOW SPEED, FLIPPED OVER AS IT BROKE THROUGH
- [SDR 2008FA0000652](https://openairdocs.org/sdr/2008FA0000652.md): Engine · stopped · Aug 22, 2008 · N2391Z · Airtrc AT301 · Engine (Reciprocating)
  > ENGINE QUIT IN MID-AIR. ENGINE HAD 1195.0 HOURS SINCE MAJOR OVERHAUL. (K)
- [SDR 2007FA0000727](https://openairdocs.org/sdr/2007FA0000727.md): Blade · broken · Jun 20, 2007 · N23667 · Airtrc AT301 · Propeller Blade Section
  > (9 INCHES) OF PROP BLADE BROKE OFF IN FLIGHT. THE SEVERE VIBRATION CAUSED PILOT TO LAND IN MUDDY FIELD. AIRCRAFT WAS TOTALED. (K)
- [SDR 2004FA0000784](https://openairdocs.org/sdr/2004FA0000784.md): Crankshaft · cracked · May 15, 2004 · N8561S · Airtrc AT301 · Reciprocating Engine Power Section
  > AC WAS ON FERRY FLIGHT, PILOT REPORTED GETTING OIL ON WINDSHIELD. OIL BEGAN TO GET WORSE; REDUCED POWER, AC STARTED VIBRATING SEVERELY. POWER WAS REDUCED FURTHER AND VIBRATION ALSO REDUCED. PILOT LANDED AC IN UNPLANTED FIELD. AC SKIPPED OVER TERRACE AS SLO
- [SDR MMS2002F00000](https://openairdocs.org/sdr/MMS2002F00000.md): Bearing · worn · Aug 28, 2002 · N316OT · Airtrc AT301 · Reciprocating Engine Power Section
  > ENGINE OIL CHIP LIGHT CAME ON AFTER TAKE OFF. RETURNED AND LANDED. FOUND METAL IN OIL AND FILTER. REMOVED PROP AND THRUST BEARING COVER. FOUND THRUST BEARING BALLS SEVERLY WORN AND BALL CAGE BROKEN. REMOVED GEAR REDUCTION CASE AND REWORKED BY OVERHAUL FAC
- [SDR AUS20020133](https://openairdocs.org/sdr/AUS20020133.md): Spider · cracked · Feb 19, 2002 · Airtrc AT301 · Propeller Hub Section
  > (AUS) PROPELLER SPIDER CRACKED. CRACK LENGTH 50.8MM (2IN).
- [SDR 2001FA0000149](https://openairdocs.org/sdr/2001FA0000149.md): Wheel · fatigued · Jul 28, 2001 · N4361S · Airtrc AT301 · Wheel/Ski/Float
  > DURING TAKEOFF, RIGHT MAIN WHEEL HALF (OUTBOARD) SEPARATED. PILOT UNABLE TO REGAIN CONTROL AND WENT IN ROAD DITCH AND LANDED INVERTED. MINOR INJURY TO PILOT. WHEEL NUT, BEARING AND SPACER WERE STILL ON AXLE UPON ARRIVAL AT ACCIDENT SCENE. OUTER BEARING RACE HA
- [SDR 2001FA0000195](https://openairdocs.org/sdr/2001FA0000195.md): Cylinder · cracked · Jul 3, 2001 · N3164H · Airtrc AT301 · Reciprocating Engine Cylinder Section
  > THE NR 3 CYLINDER HEAD CRACKED AT THE ROCKER BOSS, ENGINE LOST POWER, AIRCRAFT EMERGENCY LANDED IN A FIELD. 2ND OCCURANCE.
- [SDR 20001102SH032](https://openairdocs.org/sdr/20001102SH032.md): Turbine · damaged · Aug 6, 2000 · N5079S · Airtrc AT301 · Turbine Section
  > ENGINE DISASSEMBLED 10/4/00. EXTENSIVE DAMAGE TO POWER SECTION OF ENGINE DUE TO ENGINE OPERATION AFTER FIRST KNOWLEDGE OF MALFUNCTION. POSSIBLE CAUSE, LINK ROD BROKE AT LINK PIN AND DUE TO METAL FATIGUE. (X)
- [SDR 20000417SH012](https://openairdocs.org/sdr/20000417SH012.md): Pushrod · misinstalled · Feb 14, 2000 · N23043 · Airtrc AT301 · Reciprocating Engine Cylinder Section
  > ENGINE VALVE PUSH RODS AND ROCKER ARMS WERE REVERSED DURING INSTALLATION ON THE NR 5 CYLINDER. SINCE THE INTAKE ROD IS LONGER AND ENGINE HAS SOLID TAPPETS, THE PUSH ROD ON THE EXHAUST SIDE BENT, AND THE ROCKER ARM BROKE RESULTING IN ENGINE FAILURE. ENGINE OP
- [SDR AU990910](https://openairdocs.org/sdr/AU990910.md): Impeller · damaged · Sep 6, 1999 · Airtrc AT301 · Turbine Engine Compressor Section
  > (AUS) COMPRESSOR SECOND STAGE IMPELLER VANES (2 OFF) FRACTURED AND SEPARATED. CAUSED BY EROSION OF VANES. DAMAGE TO INTERNAL COMPONENTS.
- [SDR AU980983](https://openairdocs.org/sdr/AU980983.md): Nut · missing · Aug 14, 1998 · Airtrc AT301 · Master Cylinder/Brake Valve
  > (AUS) BRAKE MASTER CYLINDER PISTON TO SHAFT SECURING NUT MISSING.
- [SDR 98ZZZX2177](https://openairdocs.org/sdr/98ZZZX2177.md): Blade · failed · May 1, 1998 · N8869S · Airtrc AT301 · Propeller Blade Section
  > BLADE FAILED DURING SPRAY TURN (AG OPERATOR), 11.75 INCHES CAME OFF ONE BLADE. NO VISUAL EVIDENCE OF INPACT DAMAGE. SUBMITTER STATED APPEARS TO BE A RESULT OF FATIGUE. AIRCRAFT LANDED IN FIELD WITHOUT DAMAGE OTHER THAN THAT CAUSED BY SEVERE VIBRATION.
- [SDR 98ZZZX1000](https://openairdocs.org/sdr/98ZZZX1000.md): Cylinder · cracked · Feb 18, 1998 · N3656C · Airtrc AT301 · Reciprocating Engine Cylinder Section
  > THE NR 2 CYLINDER WAS FOUND CRACKED FROM THE REAR SPARK PLUG PORT TO THE FRONT SPARK PLUG PORT ON THE UPPER INTAKE SIDE OF THE CYLINDER HEAD.
- [SDR AU971559](https://openairdocs.org/sdr/AU971559.md): Circuit Breaker · faulty · Dec 16, 1997 · Airtrc AT301 · DC Power Distribution System
  > (AUS) CIRCUIT BREAKERS FAULTY.
- [SDR AU971496](https://openairdocs.org/sdr/AU971496.md): Indicator · faulty · Dec 2, 1997 · Airtrc AT301 · Turn and Bank/Rate of Turn Indicator
  > (AUS) TURN AND SLIP INDICATOR FAULTY. WHITE PAINT BEHIND SLIP BALL IS CRAZED AND FLAKING. ON/OFF FLAG IS PUSHED BACK ONTO TURN AND SLIP INDICATOR. INSTRUMENT FAILED AD/INST8 AMDT3.
- [SDR AU971495](https://openairdocs.org/sdr/AU971495.md): Circuit Breaker · faulty · Dec 1, 1997 · Airtrc AT301 · DC Power Distribution System
  > (AUS) CIRCUIT BREAKERS FAULTY.
- [SDR AU971494](https://openairdocs.org/sdr/AU971494.md): Circuit Breaker · faulty · Nov 28, 1997 · Airtrc AT301 · DC Power Distribution System
  > (AUS) CIRCUIT BREAKERS FAULTY.
- [SDR AU971556](https://openairdocs.org/sdr/AU971556.md): Cap · faulty · Oct 31, 1997 · Airtrc AT301 · Battery/Charger System
  > (AUS) BATTERY VENT CAP VULCANISED CLOSED. GAS BUILDUP CAUSED ACID TO VENT FROM AN ADJACENT CELL.
- [SDR AU971493](https://openairdocs.org/sdr/AU971493.md): Circuit Breaker · faulty · Oct 25, 1997 · Airtrc AT301 · DC Power Distribution System
  > (AUS) ALL CIRCUIT BREAKERS FAILED TO MEET MANUFACTURERS REQUIREMENTS.
- [SDR 97ZZZX3922](https://openairdocs.org/sdr/97ZZZX3922.md): Cylinder · cracked · Aug 15, 1997 · N4411S · Airtrc AT301 · Reciprocating Engine Cylinder Section
  > ENGINE LOST POWER AFTER TAKEOFF. MADE FORCED LANDING INTO FIELD. SUBSTANTIAL DAMAGE TO AIRCRAFT. PILOT HAS MINOR INJURIES. INVESTIGATION HAS REVEALED THAT NR 1 CYLINDER HEAD CRACKED INTO 2 PIECES. SUBMITTER SUBMITTED SAFETY RECOMMENDATION FOR EVALUATION A
- [SDR AU970602](https://openairdocs.org/sdr/AU970602.md): Actuator · failed · Jun 3, 1997 · Airtrc AT301 · Trailing Edge Flap Actuator
  > (AUS) FLAP ACTUATOR OVER TRAVEL STOP SEPARATED CAUSING DAMAGE TO THE THREAD AND LOSS OF BALLS FROM THE BALLNUT ASSEMBLY - FOUND DURING DISASSEMBLY FOR INCORPORATION OF AD/AT/19 - SERVICE LETTER 140
- [SDR 97ZZZX2001](https://openairdocs.org/sdr/97ZZZX2001.md): Cylinder · separated · Apr 21, 1997 · N4397S · Airtrc AT301 · Reciprocating Engine Cylinder Section
  > AIRCRAFT EXPERIENCED A SUDDEN LOSS OF POWER. EMERGENCY LANDING MADE AT MOUNTAIN HOME AIR FORCE BASE. NR 9 CYLINDER HEAD HAD SEPARATED JUST ABOVE THE TOP OF PISTON TRAVEL. FATIGUE FRACTURE APPEARS TO ORIGINATE AT THE EXHAUST VALVE SEAT. 675 SMOH.
- [SDR AU970383](https://openairdocs.org/sdr/AU970383.md): Angle · cracked · Jan 7, 1997 · Airtrc AT301 · Wing, Fuselage Attach Fittings
  > (AUS) LH INBOARD AND OUTBOARD WING ATTACHMENT ANGLES CRACKED IN THE AREA OF THE TOP RADIUS - CRACK LENGTHS 20MM TO 25MM BY 1MM DEEP (0.787IN TO 0.98IN BY 0.039IN DEEP) - CRACKING WAS FOUND WITH THE NAKED EYE AND CONFIRMED BY DYE PENETRANT
- [SDR 96ZZZX4337](https://openairdocs.org/sdr/96ZZZX4337.md): Propeller · bolt broke · Aug 1, 1996 · N8883S · Airtrc AT301 · Propeller Hub Section
  > COUNTERWEIGHT BOLT BROKE CAUSING AIRCRAFT TO PERFORM AN EMERGENCY LANDING AND NOSING OVER ON ITS BACK CAUSING EXTENSIVE DAMAGE TO THE AIRCRAFT.
- [SDR EY2R9600670](https://openairdocs.org/sdr/EY2R9600670.md): Clamp · corroded · May 1, 1996 · Airtrc AT301 · Propeller Assembly
  > CLAMP CORRODED.
- [SDR 96ZZZX2646](https://openairdocs.org/sdr/96ZZZX2646.md): Cam · cracked · Apr 22, 1996 · N36503 · Airtrc AT301 · Reciprocating Engine Power Section
  > ENGINE RAN ROUGH AND BACK-FIRED CAUSING THE PILOT TO MAKE AN EMERGENCY LANDING. THE ENGINE (FRONT) WAS DISASSEMBLED FINDING THE CAM CRACKED.
- [SDR AU960441](https://openairdocs.org/sdr/AU960441.md): Bearing · broken · Feb 28, 1996 · Airtrc AT301 · Propeller Assembly
  > (AUS) PROPELLER BLADE THRUST ROLLER BEARING PNO 70096 BROKEN INTO FIVE PIECES - THE OTHER BEARING WAS CRACKED, CORRODED AND HAD PIECESMISSING FROM THE ROLLER - INVESTIGATION FOUND MOISTURE HAD CAUSEDTHE BEARING TO RUST WHICH LED TO THE EVENTUAL BEARING FAILURE
- [SDR 95ZZZX5927](https://openairdocs.org/sdr/95ZZZX5927.md): Cylinder · head broke · Sep 20, 1995 · N2362D · Airtrc AT301 · Reciprocating Engine Cylinder Section
  > CYLINDER HEAD BROKE AT EXHAUST VALVE ROCKER SHAFT ATTACHMENT PREVENTING THE ROCKER ARM FROM OPENING THE EXHAUST VALVE. THE ENGINE SUBSEQUENTLY QUIT AND THE AIRCRAFT CRASHED IN A FIELD.
- [SDR 95ZZZX6068](https://openairdocs.org/sdr/95ZZZX6068.md): Tube · cracked · Sep 5, 1995 · N73075 · Airtrc AT301 · Engine Mount Section
  > DURING ANNUAL INSPECTION, THE TUBE USED TO MOUNT ENGINE OIL TANK FOUND CRACKED AT THE RIGHT REAR TANK MOUNTING POINT. THE CRACK ENCIRCLED THE TUBE, BUT DID NOT MEET. DURING REPAIR, NO EVIDENCE OF INTERNAL CORROSION ON TUBING OTHER THAN AT CRACK AREA.
- [SDR 95ZZZX3639](https://openairdocs.org/sdr/95ZZZX3639.md): Magneto · shorted · May 25, 1995 · N36552 · Airtrc AT301 · Magneto/Distributor
  > MAGNETO COVER ON RIGHT MAGNETO VIBRATED SCREWS LOOSE CAUSING COVER TO GROUND COIL KILLING MAGNETO WHICH CAUSED ENGINE FAILURE.
- [SDR 95ZZZX6700](https://openairdocs.org/sdr/95ZZZX6700.md): Cylinder · cracked · May 19, 1995 · N3655Z · Airtrc AT301 · Reciprocating Engine Cylinder Section
  > THE PILOT COMPLETED THE FIRST SWATH AND INITIATED A CLIMB TO REVERSE DIRECTION. WHILE THE AIRPLANE WAS IN A NOSE HIGH ATTITUDE AT ABOUT 200 FEET ABOVE THE GROUND, THE ENGINE LOST POWER. DURING THE FORCED LANDING TO A WHEAT FIELD, THE AIRCRAFT SUSTAINED STRUC

## 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 = 'AT301'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/model/air-tractor-at-301/reports

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