# Service difficulty reports: Bell Textron Canada 412EP

A list on [Bell Textron Canada 412EP](https://openairdocs.org/model/bell-textron-canada-412ep.md).

Newest first. General aviation reporting is voluntary.

Page 1 of 4 · 181 reports

- [SDR 2025FA0000642](https://openairdocs.org/sdr/2025FA0000642.md): Static Inverter · overheated · Sep 12, 2025 · N282SD · Bell 412EP · AC Inverter
  > THE CREW CAME OUT FOR A TRAINING FLIGHT, STARTED THE AIRCRAFT JUST FINE AND IDLED ON DECK FOR A FEW MINUTES. UPON TAKE OFF THE #1 INVERTER SWITCH TURNED ITSELF OFF AND SUBSEQUENTLY LOST AUTOPILOT. WHEN THE INVERTER SWITCH WAS SWITCHED BACK TO ON THAT IS WHEN T
- [SDR 2023FA0000361](https://openairdocs.org/sdr/2023FA0000361.md): Fitting · sheared · Mar 27, 2023 · N412VC · Bell 412EP · Main Rotor Gearbox
  > DURING CRUISE FLIGHT EXPERIENCED A TOTAL LOSS OF ALL MAIN ROTOR TRANSMISSION FLUID DUE TO FAILURE OF 1 ELBOW FITTING (P/N: AS1040W0404). EMERGENCY LANDING PERFORMED WITH NO DAMAGE TO AIRCRAFT OR INJURY TO ANY OCCUPANTS. DURING CONVERSATIONS WITH THE OEM (BELL
- [SDR RV1R2020010800019](https://openairdocs.org/sdr/RV1R2020010800019.md): Elastomer · failed · Sep 30, 2019 · N962KW · Bell 412EP · Main Rotor Head
  > FAILED ELASTOMER FOUND DURING REMOVAL FOR MAST SEAL REPLACEMENT. THIS PART CAN ONLY BE INSPECTED WITH MR HUB DISASSEMBLED AND THE ONLY REQUIREMENT FOR THIS INSPECTION IS LOCATED IN THE 2500 HOUR AIRFRAME INSPECTION. THE AIRCRAFT IN QUESTION ONLY HAS 1800 HOU
- [SDR RV1R20191002466](https://openairdocs.org/sdr/RV1R20191002466.md): Bearing · separated · Sep 30, 2019 · N962KW · Bell 412EP · Main Rotor Head
  > COMPLETE SEPERATION OF THE PIVOT BEARING ELASTOMER FROM THE BASE. NOT VISABLE WITH THE BLADES INSTALLED, TOTAL FAIURE HAD NOT TAKEN PLACE 7.0 HOURS AGO.THIS ITEM HAS A FIRST INSPECTION INTERVAL AT 2500 HOURS, AIRCRAFT ONLY HAS 1800 BUT IS 13 + YEARS OLD RECOME
- [SDR 2019FA0000239](https://openairdocs.org/sdr/2019FA0000239.md): Bellcrank · loose · Aug 1, 2019 · N223JC · Bell 412EP · Aircraft Fuel Filter/Strainer
  > THE HELICOPTER EXPERIENCED A TORQUE AND RPM FLUCTUATION SHORTLY AFTER TAKE-OFF. A FAULTY AUTOMATIC FUEL CONTROL UNIT WAS REPLACED. DURING THE ENGINE RIGGING PROCESS, EXCESSIVE PLAY WAS NOTED IN THE DROOP COMPENSATOR ROD ASSEMBLY. FURTHER INSPECTION REVEALED
- [SDR CA190604022](https://openairdocs.org/sdr/CA190604022.md): Cable · out of rig · Jun 4, 2019 · Bell 412EP · Life Raft
  > (CAN) ON INSPECTION, FACTORY LEAD SEAL BROKEN AND LIFE RAFT ACTUATING CABLES WERE FOUND TO BE OUT OF RIG I.A.W. MANUFACTURES ICA DIMENSIONS (PARA 4.4.6 & 4.4.7) AT THE MULTI CABLE BOX. EXCESSIVE FREE PLAY FOUND IN CONSOLE TO BOX CABLE WHICH WOULD HAVE PREVENTE
- [SDR CA190510007](https://openairdocs.org/sdr/CA190510007.md): Cable · out of rig · May 9, 2019 · Bell 412EP · Emergency Flotation Section
  > (CAN) AFTER A SUCCESSFUL FLOAT DEPLOYMENT AND INFLATION FROM COCKPIT DURING THE 36 MONTH INSPECTION, THE LIFE RAFT DEPLOYMENT HANDLE WAS CYCLED NUMEROUS TIMES BUT FAILED TO DEPLOY/INFLATE THE LIFE RAFTS. LIFE RAFTS WERE SUCCESSFULLY DEPLOYED USING THE EXTERIOR
- [SDR 2018FA0000303](https://openairdocs.org/sdr/2018FA0000303.md): Bevel Gear · worn · Jul 25, 2018 · N549RQ · Bell 412EP · Main Rotor Gearbox
  > DURING ROUTINE MAINTENANCE / MODIFICATION IT WAS VISUALLY NOTED THAT THERE WAS AN ABNORMAL WEAR PATTERN ON THE SPIRAL BEVEL GEAR INSIDE THE MAIN ROTOR TRANSMISSION ASSY P/N 412-040-007-101 S/N BH282157. TECHNICAL SUPPORT WAS CONTACTED, AND VERIFIED THE ABNORMA
- [SDR CA180510007](https://openairdocs.org/sdr/CA180510007.md): Wire · chafed · May 10, 2018 · Bell 412EP · Main Rotor System Wiring
  > (CAN) PART NUMBERS: D38999/26WA98SN AND 30-269-1P09N05 WIRING THROUGH EMI CONNECTOR CONTACTS AND CHAFES ON BACKSHELL 90 DEGREE BEND AND SHORTS TO GROUND GIVING ERRONEOUS CREW ALERTING SYSTEM MESSAGES. IN THIS CASE IT WAS ON THE TRANSMISSION FULL FLOW DEBRIS M
- [SDR 2017FA0000222](https://openairdocs.org/sdr/2017FA0000222.md): Windscreen · cracked · May 30, 2017 · N241FA · Bell 412EP · Windshield/Door Rain/Ice Removal
  > EN ROUTE TO HOMEBASE, PILOT NOTICED WINDSCREEN WAS CRACKED
- [SDR QMLA2016072516085](https://openairdocs.org/sdr/QMLA2016072516085.md): Windshield · cracked · Jul 25, 2016 · N87AM · Bell 412EP · Flight Compartment Windows
  > ON NR 1 ENGINE START UP THE CO-PILOT WINDSCREEN CRACKED APPROX. 28" ALONG THE LOWER EDGE. THE PILOT SHUT DOWN THE ENGINE AND WROTE UP THE DISCREPANCY. MECHANICS REPORTED THE DISCREPANCY TO MCAS AND THE AIR CRAFT WAS TAKEN OOS. A REQUEST FOR A SPECIAL FERRY PER
- [SDR CA150911005](https://openairdocs.org/sdr/CA150911005.md): Engine · power loss · Sep 2, 2015 · Bell 412EP · Engine (Turbine/Turboprop)
  > (CAN) WHILE ON APPROACH THE ACFT LOST POWER FROM NR 2ENGINE. CREW MADE A EMERGENCY CALL OUT AND TOOK APPROPRIATE EMERGENCY ACTION TO STABILIZE THE FLIGHT FOR SINGLE ENGINE OPERATIONS AND DIVERTED. WHILE ENROUTE, THE CREW SUCCESSFULLY RESTARTED NR 2 ENGINE UTI
- [SDR CA150727014](https://openairdocs.org/sdr/CA150727014.md): Clutch · slipped · Jul 24, 2015 · Bell 412EP · Emergency Equipment
  > (CAN) ON HOIST OPERATION, THE RESCUE SPECIALIST REPORTED A SLIPPAGE FROM THE HOIST CABLE WHILE DESCENDING ON THE SITE. THE UNIT IS NOT INCLUDED IN THE LIST OF AFFECTED HOISTS CALLED ASB 44301-10-15 AND BY AD 2013-06-51. THE HOIST HAS ACCUMULATED A TOTAL OF 15
- [SDR CA150709001](https://openairdocs.org/sdr/CA150709001.md): Bearing · separated · Jun 26, 2015 · Bell 412EP · Main Rotor Head
  > (CAN) THE QUALITY OF RIDE IN THE HELICOPTER DEGRADED AND THE HUMS SYSTEM ALSO HAD INDICATED AN ISSUE. DURING THE INVESTIGATION, IT WAS FOUND THAT THE PIVOT BEARING HAD SEPARATED FROM THE SPINDLE ASSY. THE SPINDLE ASSY WAS REMOVED AND AN O/H ASSY INSTALLED. S
- [SDR CA150602010](https://openairdocs.org/sdr/CA150602010.md): Engine · overtemp · May 16, 2015 · Bell 412EP · Engine (Turbine/Turboprop)
  > (CAN) REPORTED THAT DURING A TRAINING FLIGHT, ENGINE NR 1 OVERTEMPED WHEN GOVERNOR WAS SWITCHED FROM AUTO TO MAN WITH N1 AT 70 PERCENT. GROUND INSPECTION PERFORMED AND DEBRIS FOUND AT ENGINE NR 1 EXHAUST AREA WITH DENTS NOTED IN THE EXHAUST DUCTS, FIELD SERVI
- [SDR CA141202002](https://openairdocs.org/sdr/CA141202002.md): Engine · making metal · Nov 3, 2014 · Bell 412EP · Engine (Turbine/Turboprop)
  > (CAN) BEFORE TAKEOFF, PILOT REPORTED THAT THE CHIP DETECTOR CAUTION LIGHT WAS ILLUMINATED, THUS THE PILOT PROCEEDED TO SHUTDOWN THE ENGINE AND THE FLIGHT WAS ABORTED. METAL FLAKES FOUND ON THE CHIP DETECTOR WERE SENT TO THE LAB FOR ANALYSIS.
- [SDR 9EKA20141030012](https://openairdocs.org/sdr/9EKA20141030012.md): Oil Cooler · cracked · Oct 29, 2014 · N414EV · Bell 412EP · Engine Fuel/Oil Cooler
  > DURING 1000 HOUR INSPECTION OF OIL COOLERS MULTIPLE CRACKS ON VANE WELDS WERE FOUND.
- [SDR CA141003002](https://openairdocs.org/sdr/CA141003002.md): Wire · smoke · Oct 2, 2014 · Bell 412EP · Electrical Power System Wiring
  > (CAN) WHEN STARTING ENGINE NR 1 WITH BATTERY POWER IN AUTO MODE, AND UPON REACHING 61 PERCENT NG, ELECTRICAL SMOKE WAS NOTICED COMING OUT FROM UNDER THE COPILOTS INSTRUMENT PANEL. PRIOR TO REACHING 61 PERCENT NG, A NOTICEABLE TICKING/PULSING NOISE COULD BE HE
- [SDR CA140908028](https://openairdocs.org/sdr/CA140908028.md): Yoke · unserviceable · Sep 4, 2014 · Bell 412EP · Tail Rotor Head
  > (CAN) DURING THE DAILY INSPECTION IT WAS NOTICED THAT 1 TAIL ROTOR YOKE FEATHERING BEARING OUTER RACE STAKE HAD FAILED. UPON FURTHER INVESTIGATION ALL 4 TAIL ROTOR YOKE FEATHERING BEARING OUTER RACE STAKES HAD FAILED.
- [SDR CA140813006](https://openairdocs.org/sdr/CA140813006.md): Blade · delaminated · Aug 2, 2014 · Bell 412EP · Main Rotor Blades
  > (CAN) MAIN ROTOR BLADE DELAMINATION FOUND DURING INSPECTION. LOCATION WAS INBD OF THE INBD TRIM TAB. THE MAIN ROTOR BLADE IS ON CONDITION. BLADE REPLACED AND ACFT RETURNED TO SERVICE.
- [SDR CA131118023](https://openairdocs.org/sdr/CA131118023.md): Clevis · cracked · Nov 18, 2013 · Bell 412EP · Main Rotor Head
  > (CAN) DURING 2500HR INSPECTION OF A THE MAIN ROTOR HEAD, ONE DROOP RESTRAINT CLEVIS WAS FOUND TO HAVE A LENGTHWISE CRACK RUNNING ENTIRE LENGTH OF CLEVIS.
- [SDR CA131118006](https://openairdocs.org/sdr/CA131118006.md): Gear · failed · Nov 5, 2013 · Bell 412EP · Turbine Engine Reduction Gear
  > (CAN) THE ACFT RETURNED TO BASE WITHOUT COMPLETING ITS MISSION DUE TO ENGINE NR 2 CHIP WARNING. THE AFFECTED POWER SECTION WAS APPARENTLY SHUTDOWN. POST FLIGHT INSPECTION REVEALED SIGNIFICANT METAL DEBRIS IN THE NR 2 POWER SECTION RGB CHIP DETECTOR. THE RGB
- [SDR CA130701009](https://openairdocs.org/sdr/CA130701009.md): Oil System · low pressure · Jun 14, 2013 · Bell 412EP · Engine Oil System (Airframe Furnished)
  > (CAN) THE PILOT SHUTDOWN THE ENGINE NR 1 DUE TO OIL PRESSURE LOST.
- [SDR CA130416012](https://openairdocs.org/sdr/CA130416012.md): Engine · shutdown · Apr 4, 2013 · Bell 412EP · Engine (Turbine/Turboprop)
  > (CAN) IN PREPARATION OF THE ENGINE SHUTDOWN, ENGINES THROTTLES WERE BROUGHT DOWN TO FLIGHT IDLE, APPROXIMATELY 80 PERCENT NR, ALLOWING FOR COOLING PERIOD. ALL OF A SUDDEN AND COMPLETELY UNEXPECTED, THERE WAS AN OVERSPEED OF THE ENGINE NP 1 NR AND N2 OF UP TO
- [SDR CA121022005](https://openairdocs.org/sdr/CA121022005.md): Line · broken · Sep 27, 2012 · Bell 412EP · Engine Bleed Air System
  > (CAN) THIS HELICOPTER HAS EXPERIENCED ITS SECOND BROKEN P3 AIR LINE, IN 600 HOURS ON ENGINE NR 1. THE PREVIOUS EVENT WAS WITH PS TH0727 IN THE SAME POSITION ON THE ACFT.
- [SDR ALGA2012061804](https://openairdocs.org/sdr/ALGA2012061804.md): Support Case · cracked · Jun 18, 2012 · Bell 412EP · Main Rotor Gearbox
  > CRACKED SUPPORT CASE BEYOND LIMITS.
- [SDR ALGA2012061406](https://openairdocs.org/sdr/ALGA2012061406.md): Crosstube · corroded · Jun 14, 2012 · N9YONE · Bell 412EP · Main Landing Gear
  > CROSSTUBE, CORROSION BEYOND LIMITS.
- [SDR ALGA2012061307](https://openairdocs.org/sdr/ALGA2012061307.md): Crosstube · corroded · Jun 13, 2012 · N9YONE · Bell 412EP · Main Landing Gear
  > CROSSTUBE, CORROSION BEYOND LIMITS.
- [SDR ALGA2012052216](https://openairdocs.org/sdr/ALGA2012052216.md): Crosstube · corroded · May 22, 2012 · N9YBRS · Bell 412EP · Main Landing Gear
  > CROSSTUBE HAS CORROSION BEYOND LIMITS IN ZONE 2.
- [SDR ALGA2012052215](https://openairdocs.org/sdr/ALGA2012052215.md): Crosstube · corroded · May 22, 2012 · N9YBRS · Bell 412EP · Main Landing Gear
  > CROSSTUBE HAS CORROSION BEYOND REPAIR LIMITS IN ZONE 1 & 2.
- [SDR ALGA2012051401](https://openairdocs.org/sdr/ALGA2012051401.md): Crosstube · corroded · May 14, 2012 · N9YBRS · Bell 412EP · Main Landing Gear
  > CROSSTUBE CORRODED BEYOND REPAIRABLE LIMITS.
- [SDR ALGA2012051103](https://openairdocs.org/sdr/ALGA2012051103.md): Blower · worn · May 11, 2012 · N9YBRS · Bell 412EP · Engine Oil Cooler
  > OIL COOLER BLOWER WORN, REPLACED ONE BEARING, PN 47-134-2 AND 1 EA BEARING, PN 47-146-1 BOTH DUE TO WEAR BEYOND REPAIRABLE LIMITS. REPLACED 1 EA GUIDE VANE PN 2660-1534-01 DUE TO CORROSION BEYOND LIMITS.
- [SDR ALGA2012050202](https://openairdocs.org/sdr/ALGA2012050202.md): Skin · corroded · May 2, 2012 · Bell 412EP · Aerodynamic Fairings
  > LOWER SKIN CORRODED BEYOND LIMITS AT STA 69.00.
- [SDR ALGA2012050201](https://openairdocs.org/sdr/ALGA2012050201.md): Web · corroded · May 2, 2012 · N9YBRS · Bell 412EP · Fuselage Miscellaneous Structure
  > BOTTOM FLANGE ON WEB CORRODED BEYOND LIMITS FROM LBL 12.68 TO RBL12.68 ST. 69.00.
- [SDR ALGA2012041801](https://openairdocs.org/sdr/ALGA2012041801.md): Shaft · sheared · Apr 18, 2012 · N9YBCO · Bell 412EP · Engine Oil Cooler
  > OIL COOLER BLOWER HAS A SHEARED SHAFT.
- [SDR ALGA2012032602](https://openairdocs.org/sdr/ALGA2012032602.md): Panel · corroded · Mar 26, 2012 · N9YTNT · Bell 412EP · Fuselage Main, Plate/Skin
  > PANEL HAS CORROSION AND SEPARATION BEYOND LIMITS.
- [SDR ALGA2012321000004](https://openairdocs.org/sdr/ALGA2012321000004.md): Bearing · worn · Mar 21, 2012 · N9YTNT · Bell 412EP · Main Rotor System
  > MAIN ROTOR DRIVE LINK BEARING WORN BEYOND LIMITS.
- [SDR ALGA2012032100003](https://openairdocs.org/sdr/ALGA2012032100003.md): Bearing · worn · Mar 21, 2012 · N9YBCO · Bell 412EP · Main Rotor System
  > MAIN ROTOR DRIVE LINK BEARING WORN BEYOND LIMITS.
- [SDR ALGA2012032100002](https://openairdocs.org/sdr/ALGA2012032100002.md): Bearing · worn · Mar 21, 2012 · N9YBCO · Bell 412EP · Main Rotor System
  > MAIN ROTOR DRIVE LINK BEARING WORN BEYOND LIMITS.
- [SDR ALGA2012032100001](https://openairdocs.org/sdr/ALGA2012032100001.md): Bearing · worn · Mar 21, 2012 · N9YBOB · Bell 412EP · Main Rotor System
  > MAIN ROTOR DRIVE LINK BEARING WORN BEYOND LIMITS.
- [SDR ALGA201203121202](https://openairdocs.org/sdr/ALGA201203121202.md): Skin · corroded · Mar 12, 2012 · N9YTNT · Bell 412EP · Passenger/Crew Doors
  > DOOR HAS CORROSION BEYOND REPAIRABLE LIMITS.
- [SDR ALGA3121201](https://openairdocs.org/sdr/ALGA3121201.md): Skin · corroded · Mar 12, 2012 · N9YTNT · Bell 412EP · Passenger/Crew Doors
  > CREW DOOR SKIN HAS CORROSION BEYOND REPAIR LIMITS.
- [SDR ALGA20122281205](https://openairdocs.org/sdr/ALGA20122281205.md): Sleeve · corroded · Feb 28, 2012 · N9YBOB · Bell 412EP · Main Rotor Gearbox
  > TRANSMISSION SLEEVE CORRODED BEYOND LIMITS.
- [SDR ALGA20122281204](https://openairdocs.org/sdr/ALGA20122281204.md): Case · corroded · Feb 28, 2012 · N9YBOB · Bell 412EP · Main Rotor Gearbox
  > TRANSMISSION CASE CORRODED BEYOND LIMITS.
- [SDR ALGA20122281203](https://openairdocs.org/sdr/ALGA20122281203.md): Cover · corroded · Feb 28, 2012 · N9YBOB · Bell 412EP · Main Rotor Gearbox
  > TRANSMISSION CORRODED BEYOND LIMITS.
- [SDR ALGA20122281202](https://openairdocs.org/sdr/ALGA20122281202.md): Case · corroded · Feb 28, 2012 · N9YBOB · Bell 412EP · Main Rotor Gearbox
  > CORRODED BEYOND LIMITS.
- [SDR ALGA20122281201](https://openairdocs.org/sdr/ALGA20122281201.md): Support Case · corroded · Feb 28, 2012 · N9YBOB · Bell 412EP · Main Rotor Transmission Mount
  > TRANSMISSION SUPPORT CASE CORRODED BEYOND LIMITS.
- [SDR ALGA20122271211](https://openairdocs.org/sdr/ALGA20122271211.md): Panel · corroded · Feb 27, 2012 · N9YTNT · Bell 412EP · Rotorcraft Tail Boom
  > PANEL ON TAILBOOM CORRODED BEYOND LIMITS
- [SDR ALGA20122271210](https://openairdocs.org/sdr/ALGA20122271210.md): Support · cracked · Feb 27, 2012 · N9YTNT · Bell 412EP · Fuselage Miscellaneous Structure
  > SUPPORT CRACKED BEYOND LIMITS.
- [SDR ALGA20122271209](https://openairdocs.org/sdr/ALGA20122271209.md): Structure · separated · Feb 27, 2012 · N9YTNT · Bell 412EP · Fuselage Main, Structure
  > ENGINE DECK STRUCTURE HAS SEPARATION BEYOND LIMITS.

Next page: https://openairdocs.org/model/bell-textron-canada-412ep/reports.md?page=2

## 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 = '412EP'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/model/bell-textron-canada-412ep/reports

---
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.