# Service difficulty reports: Boeing-Vertol 234

A list on [Boeing-Vertol 234](https://openairdocs.org/model/boeing-vertol-234.md).

Newest first. General aviation reporting is voluntary.

Page 1 of 3 · 117 reports

- [SDR CHIA202511059838](https://openairdocs.org/sdr/CHIA202511059838.md): Engine · overtemp · Nov 5, 2025 · N235CH · Boeing 234 · Engine (Turbine/Turboprop)
  > DURING DESCENT TO DROP OFF PASSENGERS AND CARGO, THE NR 2 ENGINE PTT BEGAN TO RISE TO 905C AND THE N1 WAS AT 102% FOR AT LEAST 15 SECONDS. ACFT RETURNED TO BASE. NO DUPLICATION OF INCIDENT COULD BE MADE ON THE GROUND. ENGINE AND FCU WILL BE REPLACED.
- [SDR CHIA202508149805](https://openairdocs.org/sdr/CHIA202508149805.md): Transmission · overheated · Aug 14, 2025 · N246CH · Boeing 234 · Main Rotor Gearbox
  > THE NR 2 ENGINE TRANSMISSION TEMPERATURE EXCEEDED UPPER TEMPERATURE LIMIT IN FLIGHT RESULTING IN PILOTS INITIATING ENGINE XMSN HOT EMERGENCY PROCEDURES AND RETURNING TO BASE FOR AN UNSCHEDULED LANDING. REMOVED THE NR 2 ENGINE TRANSMISSION ASSEMBLY AS UNSERVIC
- [SDR CHIA202508149804](https://openairdocs.org/sdr/CHIA202508149804.md): Switch · failed · Aug 14, 2025 · N246CH · Boeing 234 · Engine Controls
  > NR 1 ENGINE BEEP SWITCH ON THE LT COLLECTIVE BECAME INTERMITTENTLY UNRESPONSIVE IN FLIGHT, RESULTING IN PILOTS INITIATING ENGINE BEEP FAILURE/FREEZE EMERGENCY PROCEDURES AND RETURNING TO BASE FOR AN UNSCHEDULED LANDING. SUBSEQUENT INSPECTION DETERMINED THE LT
- [SDR CHIA202407187623](https://openairdocs.org/sdr/CHIA202407187623.md): Control Box · activation error · Jul 18, 2024 · N235CH · Boeing 234 · Engine Controls
  > THREE MINS AFTER TAKEOFF, THE COPILOT NOTED A SPLIT IN TORQUE SHOWING THE #1 ENGINE HAD ROLLED BACK TO 40% TORQUE. THE ENGINE WAS BEEPED UP AND THE AIRCRAFT WAS RETURNED TO BASE. TROUBLESHOOTING FOUND NO DEFECTS NOTED. FOR PRECAUTIONARY MEASURES, REPLACED #1 E
- [SDR CHIA202407167614](https://openairdocs.org/sdr/CHIA202407167614.md): Control Box · activation error · Jul 16, 2024 · N235CH · Boeing 234 · Engine Controls
  > SHORTLY AFTER INITIAL TAKE OFF FROM OUA, PILOT NOTED THE #1 ENGINE SOUNDING LIKE IT WAS ROLLING BACK. LOOKING AT THE GAUGES HE FOUND A 35% TORQUE SPLIT BETWEEN THE #1 AND #2 ENGINES. HE THEN PUT THE #1 ENGINE IN MANUAL AND CONTROLLED THE BEEPS FROM THERE. RETU
- [SDR CHIA202308076438](https://openairdocs.org/sdr/CHIA202308076438.md): Blower · shorted · Aug 7, 2023 · N242CH · Boeing 234 · Heating System
  > DURING FLIGHT PIC/SIC NOTICED SLIGHT BURNING SMELL IN COCKPIT IN FWD FLIGHT AFTER DEPARTING DIP SITE. PIC IMMEDIATELY TURNED OFF THE HEAT VENT MASTER SWITCH, AFTER WHICH NO FURTHER SMELLS WERE NOTED. CONTINUED MISSION FOR APPROXIMATELY 15-20 MINUTES AND THEN R
- [SDR CHIA2023F00247](https://openairdocs.org/sdr/CHIA2023F00247.md): Blower · shorted · Aug 7, 2023 · N242CH · Boeing 234 · Heating System
  > DURING FLIGHT PIC/SIC NOTICED SLIGHT BURNING SMELL IN COCKPIT IN FWD FLIGHT AFTER DEPARTING DIP SITE. PIC IMMEDIATELY TURNED OFF THE HEAT VENT MASTER SWITCH, AFTER WHICH NO FURTHER SMELLS WERE NOTED. CONTINUED MISSION FOR APPROXIMATELY 15-20 MINUTES AND THEN R
- [SDR CHIA5149](https://openairdocs.org/sdr/CHIA5149.md): Transmission · overtemp · Jul 19, 2022 · N242CH · Boeing 234 · Engine/Transmission Coupling
  > WE JUST COMPLETED ABOUT 2 HOURS ON A FIRE FIGHTING MISSION 15NM WEST OF BECIN FOREST SERVICE BASE AND WERE RETURNING TO BECIN BASE FOR FUEL. ABOUT HALF WAY BACK TO BASE THE XMSN HOT LIGHT ILLUMINATED ON THE ANNUNCIATER PANEL. WE PULLED OUT THE CHECK LIST AND L
- [SDR 2021FA0000223](https://openairdocs.org/sdr/2021FA0000223.md): Shaft · broken · Aug 6, 2021 · Boeing 234 · Rotorcraft Flight Control
  > FORWARD LCT FAILURE- THREADED PORTION OF THE 4TH STAGE GEARSHAFT IS FRACTURED/SEPARATED THEN FOUND STUCK INSIDE TUBE COUPLING NUT
- [SDR CHIA202102014798](https://openairdocs.org/sdr/CHIA202102014798.md): Support Fitting · cracked · Feb 1, 2021 · N235CH · Boeing 234 · Nacelle/Pylon Miscellaneous Structure
  > DURING RAMP CHECK, FOUND VERT SHAFT #2 SIDE FORWARD ATTACHMENT SUPPORT FITTING CRACKED ALL THE WAY ACROSS THE UPPER HI-LOKS.
- [SDR CHIA202010024717](https://openairdocs.org/sdr/CHIA202010024717.md): Pump · overtemp · Oct 2, 2020 · N246CH · Boeing 234 · Hydraulic Pump (Electric/Engine), Main
  > AFTER DEPARTING BAGRAM AIRFIELD HYD OVERTEMP LIGHT ON CAUTION ADVISORY PANEL ILLUMINATED ALONG WITH CORRESPONDING SYSTEM 1 HOT LIGHT ILLUMINATING ON THE OVERHEAD PANEL. PILOTS FOLLOWED CHECKLIST AND TURNED NR 1 FLT HYDRAULICS OFF AND RETURNED TO BASE. UPON R
- [SDR CHIR20209174693](https://openairdocs.org/sdr/CHIR20209174693.md): Tie Bar · cracked · Sep 17, 2020 · N245CH · Boeing 234 · Main Rotor Head
  > DURING DISASSEMBLY OF 234 FWD ROTOR HEAD ASSEMBLY P/N: 414R2001-18, S/N: A4-1425 ON SWO-060358-20, DISCOVERED GREEN TIE BAR ASSEMBLY HAS CRACK IN UPPER PLATE IN OUTER CIRCUMFERENCE OF OUTBOARD LUG AREA.
- [SDR CHIA202009064669](https://openairdocs.org/sdr/CHIA202009064669.md): Control Box · failed · Sep 6, 2020 · N239CH · Boeing 234 · Fuel Control/Reciprocating Engines
  > INTERIM SUPPLEMENTAL INFORMATION: THE OVERSPEED CONTROL BOX LISTED BELOW HAS BEEN RETURNED TO THE OEM (HONEYWELL) AND IS PRESENTLY UNDER EVALUATION BY THE OEM AND THE TC HOLDER. THIS SUPPLEMENTAL INFORMATION WILL BE UPDATED ONCE A ROOT CAUSE HAS BEEN ESTABLIS
- [SDR CHIA2020091064669](https://openairdocs.org/sdr/CHIA2020091064669.md): Control Box · failed · Sep 6, 2020 · N239CH · Boeing 234 · Engine Controls
  > PILOT ACCOUNT: DURING FIRE FIGHTING MISSION, NR 2 ENGINE ROLLED BACK TO INTERMEDIATE SETTING (LESS THAT FLIGHT RPM WITH RRPM DECAY, ABOVE GROUND IDLE). THIS OCCURRED WHILE DROPPING WATER. EMERGENCY POWER WAS NECESSARY TO MAINTAIN RRPM. AFTER GAINING AIRSPEE
- [SDR CHIA2020090624671](https://openairdocs.org/sdr/CHIA2020090624671.md): Control Box · failed · Sep 2, 2020 · N239CH · Boeing 234 · Engine Controls
  > NR 2 ENGINE ROLLBACK ON APPROACH TO WATER SOURCE. ENGINE SECURED PER EMERGENCY ABNORMAL CHECKLIST. COULD NOT FIND ANY DEPENDENCY DURING T/S. REMOVED AND REPLACED NR 2 CONTROL BOX AND ACTUATOR FOR T/S. ALL SUBSEQUENT CHECKS GOOD AND AIRCRAFT RETURNED TO SER
- [SDR CHIA2019112624266](https://openairdocs.org/sdr/CHIA2019112624266.md): Engine · power loss · Nov 22, 2019 · N235CH · Boeing 234 · Engine (Turbine/Turboprop)
  > WHILE IN CRUISE FLIGHT FROM BAGRAM THE PIC HEARD A CHANGE IN RRPM AND OBSERVED THE #1 ENGINE TQ DECREASE BY APPROXIMATELY 20% THEN RETURN TO NORMAL. HE ALERTED THEIR COMPANION AIRCRAFT THAT THEY WERE HAVING AN ISSUE AND NEEDED TO RETURN TO BAGRAM. AS THEY WERE
- [SDR CHIA202009174694](https://openairdocs.org/sdr/CHIA202009174694.md): Engine · power loss · Sep 17, 2019 · N239CH · Boeing 234 · Engine (Turbine/Turboprop)
  > ON APPROACH TO DIP SITE NR 2 ENGINE FAILED TO RESPOND. NR 2 HUNG BACK AT AROUND 20% TQ, PILOTS WENT INTO EMERGENCY ENGINE TRIM & MANUALLY BEEPED ENGINE WITH NO RESPONSE. NR 2 ECL WAS BROUGHT BACK TO GROUND POSITION TO AVOID A POTENTIAL OVERSPEED CONDITION.
- [SDR CHIA201909124159](https://openairdocs.org/sdr/CHIA201909124159.md): Angle · cracked · Sep 12, 2019 · N235CH · Boeing 234 · Fuselage Miscellaneous Structure
  > ISOLATED CRACK FOUND IN ANGLE AT STA 160, BL 11R TO 23R, WL +56 APPROX.
- [SDR CHIR20197304049](https://openairdocs.org/sdr/CHIR20197304049.md): Ring · cracked · Jun 12, 2019 · N238CH · Boeing 234 · Main Rotor Mast/Swashplate
  > SWASHPLATE ASSEMBLY REMOVED FOR SCHEDULED MAINTENANCE AND RETURNED TO RS FOR OVERHAUL ON SWO-047589-19. ROTATING RING FAILED SB 234-62-1048 INSPECTION REQUIREMENTS WITH AN EDDY CURRENT INDICATION GREATER THAN 25% FSH (ACTUAL 35% FSH). REFERENCE DISC-192262-19.
- [SDR CHIA2019061413966](https://openairdocs.org/sdr/CHIA2019061413966.md): Door Frame · cracked · Jun 11, 2019 · N242CH · Boeing 234 · Fuselage Main, Structure
  > DURING REMOVAL OF THE AFT EMERGENCY EXIT HATCH, FOUND CRACK AT STA 482, BL 50L, WL +50. REMOVED DAMAGED WEB, LOCATED AND INSTALLED NEW WEB P/N 145S3106-5 (PO# A043423) IAW 234-3 SRM REV. 2, SECTIONS 53-13-03 AND 51-50-00.
- [SDR CHIR20195273948](https://openairdocs.org/sdr/CHIR20195273948.md): Housing · cracked · May 27, 2019 · N242CH · Boeing 234 · Main Rotor Gearbox
  > THE MAINTENANCE CREW REMOVED THE AFT TRANSMISSION DUE TO AN OIL LEAK AND DISCOVERED A CRACKED FWD R/H MOUNT LUG. COMPONENT RECEIVED AT THIS REPAIR STATION 6/7/2019 AND CONFIRMED CRACKED UPPER HOUSING. THE TRANSMISSION WAS THEN INSPECTED AND REPAIRED BY THIS RS
- [SDR CHIA201905273948](https://openairdocs.org/sdr/CHIA201905273948.md): Transmission · cracked · May 27, 2019 · N242CH · Boeing 234 · Main Rotor Gearbox
  > DURING RAMP CHECK, NOTICED OIL LEAK ON TOP OF AFT XMSN. SUSPECTED AFT VERTICAL SHAFT OIL SEAL. UPON REMOVAL AND FURTHER INSPECTION OF THE AFT XMSN, FOUND FWD RT MOUNT LUG CRACKED. FOUND 1 CRACK BY VISUAL INSPECTION AND CONFIRMED BY STRIPPING PAINT ON UPPER HOU
- [SDR CHIA201905213938](https://openairdocs.org/sdr/CHIA201905213938.md): Pressure Gauge · faulty · May 21, 2019 · N246CH · Boeing 234 · Hydraulic Pressure Indicator
  > IN CRUISE FLIGHT UTILITY HYDRAULIC PRESSURE STARTED TO DECREASE BELOW OPERATING LIMITS. FOLLOWED THE EMERGENCY CHECKLIST AND LANDED AT THE NEAREST FOB WITH NO FURTHER INCIDENT.
- [SDR CHIA201904283889](https://openairdocs.org/sdr/CHIA201904283889.md): Pressure Gauge · faulty · May 21, 2019 · N246CH · Boeing 234 · Hydraulic Pressure Indicator
  > IN CRUISE FLIGHT UTILITY HYDRAULIC PRESSURE STARTED TO DECREASE BELOW OPERATING LIMITS. FOLLOWED THE EMERGENCY CHECKLIST AND LANDED AT THE NEAREST FOB WITH NO FURTHER INCIDENT.
- [SDR CHIA2019043033850](https://openairdocs.org/sdr/CHIA2019043033850.md): Skin · damaged · Mar 31, 2019 · N246CH · Boeing 234 · Fuselage Main, Plate/Skin
  > IN CRUISE FLIGHT AT 2500' AGL THE AIRCRAFT RECEIVED ONE ROUND ON THE BOTTOM OF AIRCRAFT AT STATION 320 RIGHT SIDE OF THE HOOKWELL. DAMAGE WAS DISCOVERED ON POST FLIGHT.
- [SDR CHIA201903213828](https://openairdocs.org/sdr/CHIA201903213828.md): Skin · cracked · Mar 20, 2019 · N246CH · Boeing 234 · Fuselage Main, Plate/Skin
  > DURING RAMP CHECK IS WAS NOTED VISUALLY THAT THERE WAS A 6+" SKIN CRACK STA 520 BL20L WL+97. VP-000265-19 HAS BEEN CREATED TO DO THE REPAIR.
- [SDR CHIA2019022523787](https://openairdocs.org/sdr/CHIA2019022523787.md): Structure · cracked · Feb 22, 2019 · N242CH · Boeing 234 · Fuselage Main, Structure
  > FOUND CRACK IN AFT TRANSMISSION AREA DURING "A" CHECK, STA. 575, WL +36, BL 35R. REMOVED EXISTING 2 DOUBLERS, CUT OUT CRACKED AREA AND FABRICATED FILLER. FABRICATED REPLACEMENT DOUBLER, AND LOCATED AND INSTALLED FILLER DOUBLER AND REPAIR DOUBLER. ALL WORK DONE
- [SDR CHIA201901073719](https://openairdocs.org/sdr/CHIA201901073719.md): Web · cracked · Jan 7, 2019 · N235CH · Boeing 234 · Fuselage Miscellaneous Structure
  > DURING C CHECK INSPECTION, FOUND A CRACK APPROX 2.6 INCHES LONG AT STA 482 WEB CENTERED AT WL 27.25 BL 47R. ADDITIONAL FURTHER EVAUATION DETERMINED REPAIR TO BE A MAJOR ON 9 JAN 2019. REMOVED DAMAGED MATERIAL AND REPAIRED IAW SRM.
- [SDR CHIA2018111953656](https://openairdocs.org/sdr/CHIA2018111953656.md): Deck Plate · cracked · Nov 15, 2018 · N246CH · Boeing 234 · Fuselage Main, Structure
  > DURING RAMP CHECK IT WAS NOTED THAT THE L/H SIDE CANTED DECK WL +119 LH CAP REPAIR STA 533 WAS CRACKED. REPAIRED.
- [SDR CHIA201809223520](https://openairdocs.org/sdr/CHIA201809223520.md): Generator · overheated · Sep 22, 2018 · N246CH · Boeing 234 · AC Generator-Alternator
  > WHILE REPOSITIONING FROM ROMEO RAMP TO THE SLING LOAD AREA THE NR 1 GEN HOT LIGHT ILLUMINATED. FOLLOWED THE EP CHECKLIST GUIDANCE AND TURNED OFF THE NR 1 GEN. INITIALLY THE HOT LIGHT EXTINGUISHED BUT RE-ILLUMINTATED. RETURNED TO PARKING FOR TROUBLESHOOTING. RE
- [SDR CHIA201809243519](https://openairdocs.org/sdr/CHIA201809243519.md): Housing · cracked · Sep 21, 2018 · N246CH · Boeing 234 · Main Rotor Head
  > WHILE UNDERGOING SCHEDULED MAINTENANCE, UT INSPECTION OF FORWARD PITCH HOUSING ASSEMBLY DISCLOSED A REJECT-ABLE INDICATION OF THE UPPER VERTICAL BEARING LINER BORE. CONFIRMED INDICATION PITCH HOUSING P/N 145R2075-11, S/N C1E0003 HAS BEEN REMOVED FROM SERVICE A
- [SDR CHIA2018081063437](https://openairdocs.org/sdr/CHIA2018081063437.md): Transmission · making metal · Aug 6, 2018 · N235CH · Boeing 234 · Main Rotor Drive System
  > CHIP LIGHT ILLUMINATED ON THE CAUTION PANEL DURING APPROACH TO LAND. CONFIRMED AFT TRANSMISSION ON THE MAINTENANCE PANEL. INSPECTED THE CHIP DETECTOR, FOUND LARGE FLAKE LIKE CONTAMINATION. PART REMOVED AND SENT BACK TO AURORA FACILITY. EMERGENCY CHECKLIST U
- [SDR CHIA2018081063436](https://openairdocs.org/sdr/CHIA2018081063436.md): Flt Controls · frozen · Aug 6, 2018 · N246CH · Boeing 234 · Rotorcraft Flight Control
  > DURING APPROACH FOR LANDING, THE THRUST LEVER FROZE, EVEN WHEN MAG BRAKE WAS RELEASED. PILOT WAS ABLE TO LAND ACFT SAFELY. RETURNED TO BASE AND SHUTDOWN FOR INVESTIGATION. PERFORMED TROUBLESHOOTING AND COULD NOT CONFIRM ISSUE. REMOVED AND REPLACED THRUST CCD
- [SDR CHIR201806303378](https://openairdocs.org/sdr/CHIR201806303378.md): Transmission · making metal · Jun 30, 2018 · N242CH · Boeing 234 · Main Rotor Gearbox
  > ON DEPARTURE THE XMSN CHIP LIGHT ILLUMINATED. THE AIRCRAFT RETURNED TO THE LANDING FOR FURTHER INSPECTION, WITH NO FURTHER ISSUES. THE AFT TRANSMISSION CHIP DETECTOR WAS INSPECTED, AND CHIPS WERE NOTED. THE TRANSMISSION WAS REMOVED AND REPLACED.
- [SDR CHIR201803303212](https://openairdocs.org/sdr/CHIR201803303212.md): Beam · cracked · Mar 12, 2018 · N245CH · Boeing 234 · Main Rotor Control
  > AFT ROTOR HEAD WAS IN SHOP FOR A SCHEDULED CENTER ROTOR HUB REPLACEMENT. DURING DISASSEMBLY, HORIZONTAL PIN LOCKING BEAM FOUND TO BE CRACKED. RESEARCH REVEALS THE CRACKED LOCKING BEAM TO BE AN OUTLIER. REPLACED AND COMPONENT RETURNED TO SERVICE.
- [SDR CHIA201803103191](https://openairdocs.org/sdr/CHIA201803103191.md): Plate · cracked · Mar 10, 2018 · N246CH · Boeing 234 · Fuselage Miscellaneous Structure
  > CRACKED FINGER PLATE.
- [SDR CHIR0201802140001](https://openairdocs.org/sdr/CHIR0201802140001.md): Powerpack · shorted · Feb 11, 2018 · N239CH · Boeing 234 · Cabin Equipment/Furnishings
  > INFLIGHT, THE PILOT RECEIVED NO RESPONSE FROM THE PUMPS OR GATE VALVE ON THE SEI POWERPACK SYSTEM. THE 25 AMP CIRCUIT BREAKER WAS UNABLE TO BE RESET. PILOTS NOTICED AN ELECTRICAL SMOKE ODOR COMING FROM THE CABIN AREA. AIRCRAFT RETURNED TO BASE. CONFIRMED TH
- [SDR CHIR2017120300000](https://openairdocs.org/sdr/CHIR2017120300000.md): Housing · cracked · Dec 3, 2017 · N246CH · Boeing 234 · Main Rotor Gearbox
  > SUPPLEMENTAL INFORMATION TO CHIR20171203 AND WILL REQUIRE FURTHER PROCESSING BY THE SDR/SIT QUALITY CONTROL GROUP REFERENCING A TELECON ON 3/12/2019. DISASSEMBLY OF COMBINING GEARBOX REVEALED THAT IN ADDITION TO BROKEN CONNECTOR, THE GEARBOX AND PINION GEAR SU
- [SDR CHIR20171203](https://openairdocs.org/sdr/CHIR20171203.md): Connector · broken · Dec 3, 2017 · N246CH · Boeing 234 · Main Rotor Drive System Wiring
  > PILOTS GOT CAUTION OF XMSN LOW OIL PRESSURE ON APPROACH TO BAGRAM AIRFIELD. THEY COMPLIED WITH EMERGENCY PROCEDURE CHECKLIST, USED THE OIL PRESSURE SELECTOR SWITCH TO VERIFY THE COMBINING TRANSMISSION HAD LOW PRESSURE. ALSO BACKED UP BY A SLIGHT RISE IN TEMP
- [SDR CHIR201708282942](https://openairdocs.org/sdr/CHIR201708282942.md): Skin Panel · cracked · Aug 22, 2017 · N246CH · Boeing 234 · Entrance Stairs
  > WHILE PERFORMING RAMP CHECK AT THE END OF THE DAY, MECHANIC FOUND 2 CRACKS AT BOTTOM RADIUS OF AIR STAIR ENTRANCE SKIN PANEL STA 124 WL -32 AND STA 122 WL -30. ONE CRACK WAS STOP DRILLED, THE OTHER ONE ENDED AT A RIVET AND THERE WAS NO NEED TO STOP DRILL SUCH.
- [SDR CHIR201701122702](https://openairdocs.org/sdr/CHIR201701122702.md): Web · cracked · Jan 3, 2017 · N246CH · Boeing 234 · Nacelle/Pylon, Bulkhead/Firewall
  > INSPECTION REVEALED A CRACKED FORMER, PN 114S4104-13, AT STA 534, WL +72, BL 5 RIGHT. THIS AREA INCORPORATED A PREVIOUS REPAIR ONCE REMOVED, WEB WAS CRACKED AS WELL UNDER THE REPAIR DOUBLER. IN ADDITION IT WAS NOTED THAT THE T CAP 114S4104-13 WAS CRACKED. THE
- [SDR CHIR123020162689](https://openairdocs.org/sdr/CHIR123020162689.md): Stud · broken · Dec 30, 2016 · Boeing 234 · Main Rotor Drive System
  > WHEN PAN WAS REMOVED TO PERFORM A SPIRAL BEVEL INSPECTION, MECHANIC FOUND THE NR 9 STUD BROKEN OFF AND LAYING IN THE AUX OIL SUMP PRIOR TO BEGINNING TORQUE CHECK. TRANSMISSION IS BEING REMOVED AND REPLACED.
- [SDR CHIR201611232643](https://openairdocs.org/sdr/CHIR201611232643.md): Retainer · cracked · Nov 22, 2016 · Boeing 234 · Main Rotor Mast/Swashplate
  > DURING THE FLUORESCENT PENETRANT INSPECTION OF THE AFT SWASHPLATE ASSY, THE UPPER RETAINER WAS FOUND TO HAVE FOUR CRACKS.
- [SDR CHIR102620162623](https://openairdocs.org/sdr/CHIR102620162623.md): Sun Gear · spalled · Oct 25, 2016 · N238CH · Boeing 234 · Main Rotor Drive System
  > SUPPLEMENTARY INFORMATION; CHI ENGINEERING HAS INSPECTED THIS ARTICLE AND CONTACTED THE OIL MANUFACTURER (EASTMAN OIL) TO EVALUATE THE LUBRICATION PROPERTIES. NO SUSPECT CAUSES WERE IDENTIFIED. THE CONCLUSION BY ALL CONCERNED PARTIES WAS THAT THIS WAS AN ANOMA
- [SDR CHIR201610262623](https://openairdocs.org/sdr/CHIR201610262623.md): Sun Gear · damaged · Oct 25, 2016 · N238CH · Boeing 234 · Fuselage Miscellaneous Structure
  > AFTER REMOVAL, DISASSEMBLY, AND CLEANING OF FIRST STAGE SUNGEAR OUT OF THE AFT TRANSMISSION THAT WAS REMOVED FOR HIGH SOAPS, VISUAL INSPECTION REVEALED A SIZABLE CHUNK MISSING FROM THE DRIVE SIDE OF A GEAR TOOTH. EVIDENCE OF MISSING MATERIAL HAS NOT BEEN THUS
- [SDR CHIR092120162577](https://openairdocs.org/sdr/CHIR092120162577.md): Retainer · cracked · Sep 21, 2016 · N238CH · Boeing 234 · Main Rotor Mast/Swashplate
  > DURING FLUORESCENT PENETRANT INSPECTION OF SWASHPLATE ASSY, UPPER RETAINER FOUND TO HAVE 5 CRACKS. MECHANICAL TESTING, METALLURGICAL & CHEMICAL ANALYSIS PERFORMED ON A SUBJECT RETAINER & FOUND TO MEET HARDNESS & ELECTRICAL CONDUCTIVITY REQUIREMENTS. THE PART
- [SDR CHIR201608262510](https://openairdocs.org/sdr/CHIR201608262510.md): Bolt · broken · Aug 24, 2016 · N239CH · Boeing 234 · Main Rotor Gearbox
  > WHILE PERFORMING AD 95-22-09, PARA A, 250 HR SPIRAL BEVEL INSPECTION OF THE AFT TRANSMISSION NR 12 BOLT BROKE DURING INITIAL TORQUE CHECK AT 275" LB.
- [SDR CHIR201608092520](https://openairdocs.org/sdr/CHIR201608092520.md): Rotor Head · not seated · Aug 1, 2016 · N238CH · Boeing 234 · Main Rotor Head
  > ROTOR HEAD WAS REMOVED DUE TO A FWD GREEN BLADE LEADING EDGE HORIZONTAL PIN SEAL PROTRUDING. DURING DISASSEMBLY ON SWO-021196-16, THE MECHANIC FOUND THAT THE SEAL WAS INSTALLED IN A SLEEVE WHICH WAS COMING OUT OF THE SEAL BORE. THE SEAL/LINER WORE INTO T
- [SDR CHIR050220162375](https://openairdocs.org/sdr/CHIR050220162375.md): Compressor · debonded · May 2, 2016 · Boeing 234 · Turbine Engine Compressor Section
  > THE ENGINES OEM WAS ABLE TO CONFIRM THE PLASMA REPAIR OF THE COMPRESSOR CASE WAS DONE TO APPROVED DATA. NO DETERMINATION OF THE CAUSE FOR THE FAILURE HAS BEEN MADE. THE OWNER/OPERATOR HAS MADE A BUSINESS DETERMINATION THAT MAGNESIUM CASES WITH PLASMA REPAIRS W
- [SDR CHIR020165022375](https://openairdocs.org/sdr/CHIR020165022375.md): Case · debonded · May 2, 2016 · Boeing 234 · Turbine Engine Compressor Section
  > (P2-CH) NR 2 ENGINE CHIP LIGHT, CONFIRMED METAL CONTAMINATION ON CHIP PLUG AND OIL FILTER. AFTER RECEIPT AT REPAIR STATION, DIFFUSER AND GP AREA INSPECTED PRIOR TO PRELIMINARY TEST CELL RUN WITHOUT ANY EVIDENCE OF DELAMINATION. POST TEST, DURING ROUTINE REPA

Next page: https://openairdocs.org/model/boeing-vertol-234/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 = '234'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/model/boeing-vertol-234/reports

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