# Service difficulty reports: Bell 412

A list on [Bell 412](https://openairdocs.org/model/bell-412.md).

Newest first. General aviation reporting is voluntary.

Page 1 of 91 · 4,516 reports

- [SDR CA190715012](https://openairdocs.org/sdr/CA190715012.md): Wire · missing · Jul 10, 2019 · Bell 412 · Electrical Power System Wiring
  > (CAN) DURING FLIGHT TEST. CHSP CASS MESSAGE APPEARED IN FLIGHT. TROUBLESHOOT FOUND 1 WIRE MISSING (BUT NOT RELATED) (TC# 20190715012)
- [SDR QMLA2019040279034](https://openairdocs.org/sdr/QMLA2019040279034.md): Panel · delaminated · Mar 27, 2019 · N405LN · Bell 412 · Rotorcraft Tail Boom
  > R/H TAILBOOM PANEL P/N 205 032 811 077 OUTER SKIN DELAMINATED APPROX. 24” X 3.5” BETWEEN BOOM STATIONS 77-101 WL 72.L/H TAILBOOM PANEL P/N H205 032 813 67 OUTER SKIN DELAMINATED APPROX. 15” X 2.75” BETWEEN BOOM STATIONS 73-88. ALSO PANEL HAS CORROSION ALONG T
- [SDR 9EKA20160714008](https://openairdocs.org/sdr/9EKA20160714008.md): Pan · cracked · Jul 13, 2016 · N412BG · Bell 412 · Main Rotor Gearbox
  > AIRCRAFT RETURNED FROM AN MOC FLIGHT FOLLOWING A 300 HOUR / 12 MONTH INSPECTION AND UPON SHUTDOWN, THE PILOT NOTICED THAT THE UPPER PLANETARY GEAR OF THE MAIN TRANSMISSION CHIP LIGHT HAD ILLUMINATED. DURING TROUBLESHOOTING IT WAS FOUND THAT THE DEBRIS COLLECT
- [SDR QMLA2016032216027](https://openairdocs.org/sdr/QMLA2016032216027.md): Skin · cracked · Mar 22, 2016 · N405LN · Bell 412 · Rotorcraft Tail Boom
  > AT SHIFT CHANGE, DURING PRE-FLIGHT OF ACFT NOTED A CRACK IN SKIN ON RT SIDE OF VERTICAL FIN IN THE SHAPE OF A BACKWARD C OF ABOUT 5 INCHES, AFTER MEASUREMENT POSSIBLY THROUGH 2 RIVET LOCATIONS.
- [SDR CA151110008](https://openairdocs.org/sdr/CA151110008.md): Filter · failed · Nov 3, 2015 · Bell 412 · Pneumatic Distribution System
  > (CAN) DURING A ROUTINE 100 HR P3 FILTER INSPECTION THE ENGINEER REMOVED THE P3 FILTER FROM THE POWER SECTION AND NOTICED THE SCREEN MATERIAL HAD SEPARATED FROM THE BASE OF THE FILTER. THE FILTER HAD BEEN O/H 60.3 HRS PREVIOUSLY ON PO 535474, JUNE 2015. THE FI
- [SDR 2015FA0000442](https://openairdocs.org/sdr/2015FA0000442.md): Electrical Box · failed · Sep 9, 2015 · Bell 412 · Electrical Power System
  > MFG WAS CONTACTED AND ADVISED THAT A HOIST, PN 42325-12-3, EXPERIENCED AN UNCOMMANDED REEL OUT DURING A LIVE LOAD LIFTING OPERATION. EVALUATED THE SYSTEM AND DETERMINED THAT THE FAILURE WOULD BE IN THE JUNCTION BOX, PN 42325-707. UPON ARRIVAL AT THE ACFT, T
- [SDR CA150826001](https://openairdocs.org/sdr/CA150826001.md): Screw · short · Aug 11, 2015 · Bell 412 · Main Rotor Gearbox
  > (CAN) MAIN GEARBOX, PN 412-040-002-103, NOTE THAT SECTION 8 OF THIS FORM WOULD NOT ACCEPT THE MFG INFO AND THEREFORE WOULD NOT SAVE. LOW OIL INDCATION OBSERVED IN FLIGHT, PILOT MADE EMERGENCY LANDING. UPON INSPECTION OF THE ACFT IT WAS DETERMINED THAT THE MAI
- [SDR CA150813004](https://openairdocs.org/sdr/CA150813004.md): Boot · disintegrated · Jul 11, 2015 · Bell 412 · Engine/Transmission Coupling
  > (CAN) ACFT HAD A HARD LANDING AFTER A MAIN DRIVESHAFT COUPLING FAILURE. DURING THE INVESTIGATION IT WAS NOTED THERE WAS A HIGH POSSIBILITY OF A DRIVE SHAFT BOOT FAILURE WHICH LEAD TO THE DRIVESHAFT COUPLING, TRANSMISSION END, FAILURE DUE TO AN OVERHEAT. THE
- [SDR CA150325021](https://openairdocs.org/sdr/CA150325021.md): Packing · leaking · Mar 19, 2015 · Bell 412 · Turbine Engine Oil System
  > (CAN) DURING A ROUTINE PASSENGER FLIGHT, AT FULL THROTTLE, AN OIL PRESSURE CAUTION WARNING CAME ON FOLLOWED BY AN ITT SURGE ABOVE 900 DEG C. CREW ELECTED TO SHUTDOWN THE ENGINE. OIL SPILL ON GROUND NOTICED AFTER SHUTDOWN. MAINTENANCE CREW DETERMINED THE CAU
- [SDR 2015FA0000004](https://openairdocs.org/sdr/2015FA0000004.md): Barrel Nut · cracked · Jan 12, 2015 · N412PP · Bell 412 · Rotorcraft Tail Boom
  > 1 OF 4 BARREL NUTS THAT ATTACH THE TAILBOOM TO THE AIRFRAME WAS FOUND TO BE CRACKED ACROSS THE THREADS ON 2 SIDES. THE NUT HAD BEEN REMOVED AS PART OF A MAJOR INSPECTION.
- [SDR CA141024027](https://openairdocs.org/sdr/CA141024027.md): Drive Shaft · cracked · Oct 15, 2014 · Bell 412 · Engine Fuel Pump
  > (CAN) FUEL PUMP, PN 025277-300, SN PE5971 WAS REMOVED FOR 300 HR INSPECTION IAW MM TABLE 601. UPON INSPECTION, THE MAINTENANCE TECH NOTICED THAT THERE WAS A CRACK BELOW THE GEAR TEETH, ON THE SHAFT. PUMP WAS REMOVED FROM SERVICE AT 3347.8 TSO.
- [SDR CA140710003](https://openairdocs.org/sdr/CA140710003.md): Torque Tube · sheared · Jul 8, 2014 · Bell 412 · Main Rotor Mast/Swashplate
  > (CAN) DURING A NORMAL APPROACH OF 75% TORQUE THE PILOT NOTICED THE MAST TORQUE INCREASE TO OVER 110% WHILE THE ENGINE TORQUES REMAINED UNCHANGED. HE LANDED IN A FIELD 10 MILES SOUTH AND CALLED IN THAT HE HAD AN OVERTORQUE. THE MONO POLE SENSOR, SIGNAL CONDITIO
- [SDR CA140305006](https://openairdocs.org/sdr/CA140305006.md): Bearing · failed · Mar 5, 2014 · Bell 412 · Engine Oil Cooler
  > (CAN) ON A COMBINING GEAR BOX REMOVAL, AME NOTICED A LARGE AMOUNT OF BLACK FRETTING MATERIAL BETWEEN THE C BOX AND BLOWER JOINT FLANGE. ONCE CLEANED UP THE AME WAS ABLE TO SEE THAT THE OUTER RACE OF THE BEARING ON THE BLOWER WAS ROTATING IN THE BLOWER CASTING
- [SDR CA140224024](https://openairdocs.org/sdr/CA140224024.md): Bearing · failed · Feb 13, 2014 · Bell 412 · Engine Oil Cooler
  > (CAN) ON C BOX REMOVAL THE OIL COOLER BLOWER ON NR 2 SIDE HAD BOTH FWD AND REAR BEARINGS BEGINNING TO FAIL. GREASE HAD BEEN EJECTED FROM FWD BEARING ALONG WITH A BURNED ODOR. SHOP TECH: BEARING FAILED IN SERVICE. NO INDICATION OF CAUSE. IT APPEARS THE FAI
- [SDR CA131118007](https://openairdocs.org/sdr/CA131118007.md): Blade · fractured · Nov 7, 2013 · Bell 412 · Turbine Engine Compressor Section
  > (CAN) DURING POSITIONING PHASE JUST BEFORE LANDING, A SUDDEN DROP IN NR 1 ENGINE TORQUE OCCURRED. THE ACFT LANDED ON THE TAXI WAY. ENGINE PARAMETERS AFTER LANDING WERE NORMAL, HOWEVER WHEN THE ACFT WAS ABOUT TO LIFT OFF AGAIN, THE ROTOR RPM WARNING CAME ON A
- [SDR CA131004007](https://openairdocs.org/sdr/CA131004007.md): Bolt · sheared · Oct 1, 2013 · Bell 412 · Cabin Cooling System
  > (CAN) 25HR AIR CONDITIONING INSPECTION C/O, LT CONDENSOR BLOWER MOTOR ATTACHMENT BOLT, 1 OF 3, WAS FOUND SHEARED AT MOTOR CASE. THIS IS THE THIRD OCCURRENCE OF THE ATTACHMENT BOLT FAILURE IN THE FLEET. ALL 3 BOLTS REPLACED WITH NEW.
- [SDR CA131007008](https://openairdocs.org/sdr/CA131007008.md): Fuel Heater · leaking · Sep 29, 2013 · Bell 412 · Engine Fuel/Oil Cooler
  > (CAN) SIGNIFICANT FUEL LEAK NOTED ON NR 1 ENGINE DURING GROUND OPERATIONS. LEAK CONFIRMED AS CRACKED WELD ON OIL TO FUEL HEATER.
- [SDR QMLA2013082213122](https://openairdocs.org/sdr/QMLA2013082213122.md): Warning Light · false activation · Aug 22, 2013 · N778AM · Bell 412 · Engine Indicating System
  > NR 1 ENGINE MASTER CAUTION LIGHT ILLUMINATED REPEATEDLY IN FLIGHT. NR 1 ENGINE GAUGE SHOWED OIL PRESSURE BOTTOM GREEN/TOP YELLOW AND THE TEMP SHOWED TOP OF GREEN/BOTTOM OF YELLOW. MX PERSONNEL WERE UNABLE TO DUPLICATE THE MALFUNCTION OR DETERMINE WHAT MIGHT
- [SDR CA130726004](https://openairdocs.org/sdr/CA130726004.md): Blade · debonded · Jul 19, 2013 · Bell 412 · Tail Rotor Blades
  > (CAN) WHILE CARRYING OUT A 25 HOUR INSPECTION, PERFORMED A TAP TEST WITH A BELL TAP HAMMER, FOUND THE EROSION STRIP PARTIALLY DEBONDED. TAIL ROTOR HUB AND BLADE ASSY, PN 212-011-701-123, TAIL ROTOR BLADE, PN 212-010-750-127FM.
- [SDR CA130128024](https://openairdocs.org/sdr/CA130128024.md): Wire · chafed · Jan 28, 2013 · Bell 412 · Instrument System Wiring
  > (CAN) PILOT REPORTED LATERAL CYCLIC IMPULSES FELT IN ALL FLIGHT REGIMES WITH AUTO PILOT SELECTED ON ONLY. EXTENSIVE TROUBLESHOOTING WAS CARRIED OUT OVER A 3 WEEK PERIOD. THE FINAL RECERTIFICATION OF THE PROBLEM WAS THE REPLACEMENT OF WIRE C943D22, WHICH WAS F
- [SDR CA121115006](https://openairdocs.org/sdr/CA121115006.md): Link · failed · Nov 10, 2012 · Bell 412 · Main Rotor Gearbox
  > (CAN) DURING 600 HR INSPECTION OF ACFT, LIFT LINK BEARINGS WERE FOUND SPINNING WITHIN BORE. OEM HAS NO REQUIRED INSPECTION OF THIS COMPONENT AND THIS IS NOT AN ISOLATED CASE.
- [SDR EOPA20121022397](https://openairdocs.org/sdr/EOPA20121022397.md): Housing · cracked · Oct 18, 2012 · N397AL · Bell 412 · Turbine Engine Oil System
  > ON INSPECTION, AN OIL LEAK WAS DISCOVERED IN THE COMBINED GEARBOX AREA. ON FURTHER INSPECTION THE NR 1 ENGINE CHIP DETECTOR HSG ATTACHED TO THE GEARBOX WAS FOUND CRACKED.
- [SDR ALGA2012101101](https://openairdocs.org/sdr/ALGA2012101101.md): Nut · corroded · Oct 8, 2012 · Bell 412 · Main Rotor Drive System
  > NUT FOUND UNSERVICEABLE DUE TO EXCESSIVE CORROSION.
- [SDR CA120919001](https://openairdocs.org/sdr/CA120919001.md): Turbine Wheel · fractured · Sep 8, 2012 · Bell 412 · Turbine Section
  > (CAN) IN FLIGHT SHUTDOWN. PILOT REPORTED THAT WHILE PULLING POWER, HE HEARD A SERIES OF NOISES, FOLLOWED BY A SHUDDER AND VIBRATION. THE RESULT OF THIS WAS A DECREASE IN ROTOR RPM, FOLLOWED BY A DECAY OF N1. THE FLIGHT OFFICER REPORTED N1 DROPPED TO APPROXIM
- [SDR CA120824003](https://openairdocs.org/sdr/CA120824003.md): Transistor · failed · Aug 22, 2012 · Bell 412 · Flight Compartment Lighting
  > (CAN) WHEN THE DIM FUNCTION ON THE CONSOLE IS UTILIZED FOR THE INSTRUMENT LIGHTING, THE CIRCUIT BREAKER TRIPS. TRANSISTOR, PN 130-007-1 USED IN THE SYS HAS FOUND A GROUND ON THE BASE OR CASE. THE INSULATOR SEPARATING TRANSISTOR FROM ALUMINUM BRACKET IS A PLAS
- [SDR ALGA2012061805](https://openairdocs.org/sdr/ALGA2012061805.md): Support Case · cracked · Jun 18, 2012 · Bell 412 · Main Rotor Gearbox
  > CRACKED SUPPORT CASE.
- [SDR CA120615002](https://openairdocs.org/sdr/CA120615002.md): Wire Harness · chafed · Jun 14, 2012 · Bell 412 · Electrical Power System Wiring
  > (CAN) DURING INSPECTION, IT WAS NOTICED THAT TWO WIRE BUNDLES WERE CHAFING AGAINST EACH OTHER. THE WIRE BUNDLES ARE LOCATED IN THE UPPER LT DOOR POST. WHEN THE WIRE BUNDLES WERE SEPERATED, NUMEROUS WIRES WERE FOUND CHAFED COMPLETLY THROUGH TO THE BARE WIRE. TW
- [SDR ALGA2012061202](https://openairdocs.org/sdr/ALGA2012061202.md): Flange · corroded · Jun 12, 2012 · N9YBOB · Bell 412 · Tail Rotor Drive System
  > FLANGE, CORROSION BEYOND LIMITS.
- [SDR CA120612009](https://openairdocs.org/sdr/CA120612009.md): Magnetic Brake · no test · Jun 8, 2012 · Bell 412 · Autopilot Trim Servo
  > (CAN) AS PART OF A DAILY MAINTENANCE INSPECTION THE FORCE TRIM RELEASE OF THE YAW MAGNETIC BRAKE ASSY WAS TESTED. THE MECHANIC WAS ABLE TO DETECT THAT THE BRAKE ASSY WAS NOT RELEASING ON APPLICATION OF THE FORCE TRIM SWITCH. THE UNIT WAS REMOVED AND A SERVICE
- [SDR CA120608011](https://openairdocs.org/sdr/CA120608011.md): Connector · disconnected · Jun 5, 2012 · Bell 412 · Autopilot Trim Servo
  > (CAN) WHILE IN CONFINED SPACE, FORCE TRIM OFF, PILOT FELT PEDALS BIND AND COULD NOT INPUT MORE TAIL ROTOR CONTROL. IT THEN BROKE LOOSE AND NORMAL FEEL WAS ESTABLISHED. MAINTENANCE WAS ABLE TO DUPLICATE THE SNAG IN THE HANGER. MAGNETIC BRAKE FOR THE TAIL CONT
- [SDR CA120511006](https://openairdocs.org/sdr/CA120511006.md): Tube · leaking · May 9, 2012 · Bell 412 · Hydraulic System, Main
  > (CAN) THE PILOT NOTICED THE NR1 HYDRAULIC SIDE RESEVOIR WAS NEARLY EMPTY ON SHUTDOWN AND HYDRAULIC FLUID LEAKING ON SPOT. MAINTENANCE WAS NOTIFIED. UPON INVESTIGATION, A LEAK WAS FOUND ON THE HYDRAULIC PIPE, BETWEEN THE 3 WAY CHECK VALVE AND THE INTEGRATED V
- [SDR CA120430012](https://openairdocs.org/sdr/CA120430012.md): Seal · cracked · Apr 26, 2012 · Bell 412 · Main Rotor Gearbox
  > (CAN) CARRYING OUT INSPECTION OF MAIN TRANSMISSION OIL LEVEL, IT WAS DISCOVERED THAT THE QTY WAS LOW. A GROUND RUN AND LEAK CHECK WAS PERFORMED AND FOUND THAT THE NR 1 HYDRAULIC PUMP QUILL SHAFT SEALS WERE THE SOURCE. UPON REMOVAL OF THE PUMP IT WAS DISCOVER
- [SDR ALGA2012042402](https://openairdocs.org/sdr/ALGA2012042402.md): Bearing · worn · Apr 24, 2012 · Bell 412 · Fuselage Main, Structure
  > BEARING WORN AND CORRODED BEYOND LIMITS.
- [SDR CA120312024](https://openairdocs.org/sdr/CA120312024.md): Gear · failed · Mar 12, 2012 · Bell 412 · Turbine Engine Reduction Gear
  > (CAN) DURING HEAVY MAINTENANCE OF A CH146, 3000HR/5 YEAR INSPECTION IT WAS NOTICED THAT THE CHAIN FOR THE RGB FILLER CAP AND ADAPTER PN 212-062-504-001 HAD DETACHED FROM THE FILLER TUBE. A SECTION OF THE CHAIN WAS FOUND LODGED IN THE FILLER CHECK VALVE ASSY A
- [SDR ALGA20122281215](https://openairdocs.org/sdr/ALGA20122281215.md): Nut · corroded · Feb 28, 2012 · Bell 412 · Main Rotor Mast/Swashplate
  > PITTING CORROSION BEYOND LIMITS.
- [SDR ALGA20122281214](https://openairdocs.org/sdr/ALGA20122281214.md): Mast · corroded · Feb 28, 2012 · Bell 412 · Main Rotor Mast/Swashplate
  > MAST CORRODED BEYOND LIMITS.
- [SDR CA120213007](https://openairdocs.org/sdr/CA120213007.md): Trim Switch · intermittent · Feb 10, 2012 · Bell 412 · Main Rotor Control
  > (CAN) PILOT REPORTED, ATT MODE-ERRATIC PITCH. DISCUSSION WITH THE PILOT REVEALED THAT THE PROBLEM OCCURED IN THE DECENT AND IN ATT MODE. THE PILOT STATED THAT HE ELECTED NOT TO USE THE VERTICAL MODE AND REPORTED THE FAULT UPON LANDING. THE CO-PILOT CYCLIC S
- [SDR ALGAR5493122711](https://openairdocs.org/sdr/ALGAR5493122711.md): Floor Panel · separated · Dec 27, 2011 · N9YBCO · Bell 412 · Fuselage Floor Panel
  > FLOOR PANEL DEBONDED AND SEPARATED BEYOND LIMITS.
- [SDR ALGAR5501122711](https://openairdocs.org/sdr/ALGAR5501122711.md): Floor Panel · corroded · Dec 27, 2011 · N9YBC · Bell 412 · Fuselage Floor Panel
  > (9Y-BC, EXPORTED AIRCRAFT) FLOOR PANEL CORRODED BEYOND LIMITS IAW BHT-SRM-ALL.
- [SDR CA111130009](https://openairdocs.org/sdr/CA111130009.md): Transducer · failed · Nov 23, 2011 · Bell 412 · Rotorcraft Servo System
  > (CAN) PILOT REPORTED PEDAL FEEDBACK DURING FLIGHT. FEEDBACK DISAPPEARED BELOW 40 KTS. MAINTENANCE REPORTED, TAIL ROTOR SCAS TUBE P/N 7018078 & NO. 1 YAW CMT P/N 412-074-101-103 REPLACED. DETAILS OF MAINTENANCE CARRIED OUT ONADDITIONAL TASK SHEETS (3). AIRCRAF
- [SDR CA111101003](https://openairdocs.org/sdr/CA111101003.md): Relief Valve · stuck · Oct 31, 2011 · Bell 412 · Main Rotor Gearbox
  > (CAN) TRANSMISSION THERMAL RELIEF VLV PN 205-060-512-003, FOUND STUCK OPEN & WORN DURING 3000 HR INSPECTION OF BELL 412CF. VLV WAS REMOVED TO REPLACE GASKET & UPON VISUAL INSPECTION OF VLV ASSEMBLY, POPPET APPEARED LOOSE IN HOUSING. THE VLV WAS DISASSEMBLED
- [SDR CA111026006](https://openairdocs.org/sdr/CA111026006.md): Bearing · delaminated · Oct 26, 2011 · Bell 412 · Main Rotor Head
  > (CAN) BEARING FOUND DELAMINATED DURING DAILY INSPECTION.
- [SDR CA111014001](https://openairdocs.org/sdr/CA111014001.md): Bearing · delaminated · Aug 25, 2011 · Bell 412 · Main Rotor Head
  > (CAN) BEARING FOUND DELAMINATED AROUND FULL CIRCUMFERENCE OF BEARING ASSY.
- [SDR CA110826008](https://openairdocs.org/sdr/CA110826008.md): Bearing · delaminated · Aug 24, 2011 · Bell 412 · Main Rotor Head
  > (CAN) DURING A 25 HR/30 DAY SCHEDULED INSPECTION, MAINTENANCE PERSONNEL FOUND THE DAMPER BEARING, LOCATED ON THE INBOARD SIDE OF THE SPINDLE ASSEMBLY TO BE COMPLETELY DELAMINATED AROUND ITS FULL CIRCOMFERENCE. THE BEARING ITSELF WAS DELAMINATED INTERNALLY AS A
- [SDR CA110803012](https://openairdocs.org/sdr/CA110803012.md): Bleed Valve · stuck · Jul 21, 2011 · Bell 412 · Compressor Bleed Valve
  > DURING FINAL APPROACH, THE PILOT DECLARED EMERGENCY AFTER PERFORMING A PRECAUTIONARY SHUTDOWN OF THE ENGINE DUE TO OBSERVED HIGH TEMPERATURE. AN UNEVENTFUL SINGLE ENGINE LANDING FOLLOWED. POST FLIGHT INSP FOUND A STUCK COMPRESSOR BLEED VALVE (BOV) PISTON AS
- [SDR CA110722005](https://openairdocs.org/sdr/CA110722005.md): Bleed Valve · stuck · Jul 21, 2011 · Bell 412 · Compressor Bleed Valve
  > ON APPROACH, THE CREW NOTICED THAT THEY HAD ZERO TORQUE INDICATION AND HIGH ITT ON ENGINE NR1. THE CREW SHUTDOWN THE NR 1 ENGINE AND LANDED WITHOUT FURTHER INCIDENT. THE ENGINEER TROUBLESHOOTING THE FAULT, NOTED THAT THE BLEED VALVE WAS STUCK IN THE CLOSED PO
- [SDR CA110602007](https://openairdocs.org/sdr/CA110602007.md): Radar · intermittent · May 31, 2011 · Bell 412 · Weather Radar System
  > PILOT REPORTED, "WX RADAR- DIM IMAGE AND GOING INTO "WAIT" MODE. THIS OCCURED DURING HEAVY RAIN. RADAR TURNED OFF RTB." AVIONCS PERSONNEL WERE ABLE TO REPRODUCE THE FAULT DURING A GROUND TEST. RADAR PEDESTAL AND SURROUNDING AREA IN THE AVIONICS BAY WAS FOUN
- [SDR CA110527005](https://openairdocs.org/sdr/CA110527005.md): Damper · delaminated · May 26, 2011 · Bell 412 · Main Rotor Head
  > UPON RETURNING FROM THE FLIGHT, THE PILOT ADVISED MX OF "LATERAL VIBE IN HELICOPTER. VERY NOTICEABLE AT HIGH POWER SETTINGS." UPON INSP, MX HAD FOUND THAT THE DAMPER BEARING, LOCATED ON THE INBD SIDE OF THE SPINDLE, HAD DELAMINATED FROM THE SPINDLE. (THE SPIND
- [SDR EOPA020211397AL](https://openairdocs.org/sdr/EOPA020211397AL.md): Frame · cracked · Feb 2, 2011 · N397AL · Bell 412 · Rotorcraft Tail Boom
  > FRAME WAS FOUND CRACKED AT APPROX STA 78 IN TAILBOOM ABOVE BAGGAGE COMPARTMENT.
- [SDR 2011F00024](https://openairdocs.org/sdr/2011F00024.md): Blade · delaminated · Jan 28, 2011 · N397AL · Bell 412 · Main Rotor Blades
  > M/R BLADE T/E "WEDGE" CAME DEBONDED. REMOVED REMAINING PORTION OF WEDGE AND TOUCHED UP PAINT IAW MFG PRODUCT SUPPORT ENGINEERING.

Next page: https://openairdocs.org/model/bell-412/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 = '412'
ORDER BY difficulty_date DESC
```

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