# Service difficulty reports: N246CH

A list on [N246CH](https://openairdocs.org/aircraft/N246CH.md).

Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. Newest first.

- [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 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 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 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 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 CHIA201803103191](https://openairdocs.org/sdr/CHIA201803103191.md): Plate · cracked · Mar 10, 2018 · N246CH · Boeing 234 · Fuselage Miscellaneous Structure
  > CRACKED FINGER PLATE.
- [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 CHIR20140530001](https://openairdocs.org/sdr/CHIR20140530001.md): Attach Fitting · cracked · May 27, 2014 · N246CH · Boeing 234 · Fuselage, Landing Gear Attach Fittings
  > DURING SCHEDULED D CHECK INSPECTION, FOUND CRACK IN LT & RT LG SHOCK STRUT ATTACHMENT FITTING. PN 114S3807-1 & 114S3807-2. 1 CRACK ON EACH FITTING, APPROXIMATELY.250 INCH. LOCATION OF FITTINGS STATION 483, WL 1, BL 56L & BL 56R. REPLACED THE LT AND RT ATT
- [SDR CHIR20140425001](https://openairdocs.org/sdr/CHIR20140425001.md): Panel · cracked · Apr 23, 2014 · N246CH · Boeing 234 · Fuselage Miscellaneous Structure
  > DURING A SCHEDULED B5 INSPECTION FOUR EACH C34S2187-9 FITTING SUPPORT PANEL ASSEMBLIES WERE DISCOVERED TO EACH HAVE ONE 1 INCH CRACK, FOUR CRACKS TOTAL. THE LOCATIONS OF THE FITTING SUPPORT PANEL ASSEMBLIES ARE AS FOLLOWS, FS 220, WL 5, BL 49L, FS 60, WL 5, B
- [SDR CHIR20131609001](https://openairdocs.org/sdr/CHIR20131609001.md): Inverter · out of adjust · Sep 12, 2013 · N246CH · Boeing 234 · Engine BMEP/Torque Indicating
  > OPERATOR HAS EXPERIENCED ISSUES WITH MALADJUSTED TORQUE INVERTER, SIGNAL CONDITIONERS, ALSO KNOWN AS RATIO DETECTOR POWER SUPPLY, RDPS, ASSOCIATED WITH THE ENGINE TORQUE INDICATING SYSTEM. THE FAULT IS ASSOCIATED WITH THE IMPROPER VOLTAGE OUTPUT FROM THE RDPS
- [SDR CHIR20130811001](https://openairdocs.org/sdr/CHIR20130811001.md): Angle · cracked · Aug 11, 2013 · N246CH · Boeing 234 · Fuselage Miscellaneous Structure
  > WHILE PERFORMING AN OPPORTUNITY INSPECTION OF THE AIRSTAIR DOOR CABLE PULLEY AT BS 160, NOTED THAT THE WEB & CAP WERE MOVING.0937 WHILE OPENING AND CLOSING THE DOOR. FURTHER INSPECTION REVEALED 2 CRACKS ON INBD CAP ANGLE IN AREA OF THE LOCK FASTENERS. BS 1
- [SDR CHIR20132703001](https://openairdocs.org/sdr/CHIR20132703001.md): Seat Track · damaged · Mar 27, 2013 · N246CH · Boeing 234 · Fuselage, Seat/Cargo Attach Fittings
  > DURING SCHEDULED B5 INSPECTION, FOUND ELONGATED HOLE FOR COMPANION WAY OBSERVER SEAT (AFT MOUNT BOLT). MOUNT IS INTEGRATED INTO CAP ANGLE. SUSPECT CAUSE OF ELONGATED HOLE WAS NORMAL INSERVICE WEAR. SEAT MOUNT BUSHING HOLE WAS REPAIRED IAW SL 234-0074.
- [SDR CHIR20132903001](https://openairdocs.org/sdr/CHIR20132903001.md): Support · cracked · Mar 26, 2013 · N246CH · Boeing 234 · Fuselage Miscellaneous Structure
  > DURING A SCHEDULED 500HR SIDE FACING SEAT ATTACHMENT STRUCTURE INSPECTION, NOTED CRACKS IN FITTING SUPPORT PANEL ASSY AT BS 220 LBL 49 WL 5, BS 260, LBL 49 WL 5, BS 340, LBL 49, WL 5, BS 380 LBL 49 WL5, BS 180 RBL 49 WL5, BS 220 RBL 49 WL5. SIX CRACKS TOTA
- [SDR CHIR20122607001](https://openairdocs.org/sdr/CHIR20122607001.md): Bulkhead · cracked · Jul 26, 2012 · N246CH · Boeing 234 · Fuselage Main, Bulkhead
  > DURING B1 INSPECTION, A WEB CRACK WAS DISCOVERED ON FUSELAGE BS 482, WL +29 TO +34, RBL 44 TO 49. REPAIRED IAW TYPE DESIGN HOLDER STRUCTURAL REPAIR MANUAL.
- [SDR MJ01709002](https://openairdocs.org/sdr/MJ01709002.md): Trunnion · binding · Aug 22, 2009 · N246CH · Boeing 234 · Rotorcraft Flight Control
  > DURING THE "FLIGHT CONTROLS TRAVEL AND FLIGHT BOOST SYS CHECK" AS PART OF THE PRE-FLIGHT CK, COMPANY PILOTS NOTICED ABNORMAL RESISTANCE OF LONGITUDINAL CYCLIC CONTROL MOVEMENT. AT THIS POINT THE ACFT WAS GROUNDED AND TURNED OVER TO MX. UPON FURTHER INVESTIGA
- [SDR CHIAMJ017/09/002](https://openairdocs.org/sdr/CHIAMJ017%2F09%2F002.md): Actuator · restricted · Aug 22, 2009 · N246CH · Boeing 234 · Rotorcraft Flight Control
  > DURING (FLIGHT CONTROLS TRAVEL AND FLIGHT BOOST SYS CK) AS PART OF PRE-FLIGHT CHECKS (DESCRIBED IN FLIGHT MANUAL PART 1, SECTION 2 PAGE 2-11 ITEM 29 (A)) PILOTS NOTICED ABNORMAL RESISTANCE OF LONGITUDINAL CYCLIC CONTROL MOVEMENT. AT THIS POINT ACFT WAS GROUND
- [SDR MJ01709001](https://openairdocs.org/sdr/MJ01709001.md): Trunnion · cracked · Jun 6, 2009 · N246CH · Boeing 234 · Fuselage, Landing Gear Attach Fittings
  > THIS CRACK WAS DISCOVERED WHILE PERFORMING MX ON THE RT LANDING GEAR PROXIMITY SWITCH. TRUNNION ASSY - DRAG LINKS- AFT LANDING GEAR RT. (K)
- [SDR CHI2003F00004](https://openairdocs.org/sdr/CHI2003F00004.md): Engine · making metal · Jul 27, 2003 · N246CH · Boeing 234 · Engine (Turbine/Turboprop)
  > DURING FLIGHT NR 2 ENGINE CHIP LIGHT CAMP ON. PILOTS REF EMERGENCY CHECKLIST AND IT INSTRUCTED THEM TO MONITOR ENGINE OIL PRESSURE AND TEMP, THEN LAND AS SOON AS PRACTICAL. AFTER LANDING THE NR 2 ENGINE CHIP DETECTOR WAS INSPECTED AND 2 METALLIC SLIVERS AND
- [SDR CHI2003F00003](https://openairdocs.org/sdr/CHI2003F00003.md): Engine · making metal · Jul 23, 2003 · N246CH · Boeing 234 · Engine (Turbine/Turboprop)
  > ENGINE CHIP LIGHT CAME ON IN FLIGHT, PILOTS REFERENCED EMERGENCY CHECKLIST AND IT INSTRUCTED THEM TO MONITOR ENGINE TEMP AND OIL PRESSURE AND TO LAND AS SOON AS PRACTICAL. INSPECTED CHIP DETECTOR AND FOUND A SINGLE METALLIC SLIVER, ALSO MAIN OIL FILTER BUTTON

## 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 n_number = 'N246CH' AND registry_match = 'registration'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/aircraft/N246CH/reports

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