# Service difficulty reports: N491PH, cancelled Nov 12, 2025 A list on [N491PH, cancelled Nov 12, 2025](https://openairdocs.org/deregistered/N491PH-2025-11-12.md). Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model. Newest first. Page 1 of 3 · 127 reports - [SDR HEER20180710065](https://openairdocs.org/sdr/HEER20180710065.md): Throttle Cable · broken · Jul 5, 2018 · N491PH · Bell 407 · Power Lever > AIRCRAFT WOULD NOT ROLL DOWN TO IDLE. REMOVED AND REPLACED BROKEN THROTTLE CONTROL CABLE. - [SDR HEER20160920232](https://openairdocs.org/sdr/HEER20160920232.md): Bearing · spalled · Sep 20, 2016 · N491PH · Bell 407 · Turbine Section > ENGINE REMOVED 9-2-16 TO UPGRADE NR 5 BEARING AND TURBINE OVERHAUL. NR 5 BEARING EXHIBITED SPALLING AT OUTER RACE SPLIT. REPLACED BEARING. - [SDR HEER20151028837](https://openairdocs.org/sdr/HEER20151028837.md): Bearing · spalled · Oct 28, 2015 · N491PH · Bell 407 · Turbine Section > NR 5 BEARING REMOVED DUE TO PROBABLE SPALLING AT OUTER RACE SPLIT. - [SDR HEER20141020173](https://openairdocs.org/sdr/HEER20141020173.md): Bearing · spalled · Oct 20, 2014 · N491PH · Bell 407 · Turbine Section > ENGINE REMOVED ON 10-13-14 FOR TURBINE OVERHAUL. NR 5 BEARING EXHIBITS A SPALLING BALL. REPLACED BEARING. PART WILL BE RETURNED TO MFG FOR EVALUATION. - [SDR HEEA124082](https://openairdocs.org/sdr/HEEA124082.md): Support · corroded · Mar 26, 2009 · N491PH · Bell 407 · Horizontal Stabilizer Structure > THE SUPPORT HAS EXFOLIATING CORROSION CAUSING IT TO FAIL, ALLOWING A PORTION OF THE SLAT ASSY TO DEPART FROM THE ACFT IN FLIGHT. FOUND ONCE ACFT LANDED AT BASE STATION. REPLACED SLAT ASSEMBLY. - [SDR HEEA088943](https://openairdocs.org/sdr/HEEA088943.md): Windshield · crazed · Jul 4, 2003 · N491PH · Bell 407 · Flight Compartment Windows > WINDSHIELD CRAZED. - [SDR HEEA088016](https://openairdocs.org/sdr/HEEA088016.md): Headrest · damaged · Jun 26, 2003 · N491PH · Bell 407 · Flight Compartment Equipment > DISSENGAGE PINS WILL NOT DISSENGAGE FOR HEADREST ADJUSTMENT. REPLACED WITH SERVICEABLE PART. - [SDR HEEA088025](https://openairdocs.org/sdr/HEEA088025.md): Bolt · corroded · Jun 23, 2003 · N491PH · Bell 407 · Engine Mount Section > ENGINE MOUNT BOLT CORRODED DUE TO INADEQUATE PROTECTION DURING MFG PROCESS. REPLACED WITH SERVICEABLE PART. - [SDR HEEA088012](https://openairdocs.org/sdr/HEEA088012.md): Window · crazed · Jun 23, 2003 · N491PH · Bell 407 · Flight Compartment Windows > PAX DOOR WINDOW IS CRAZED BEYOND LIMITS. REPLACED WITH SERVICEABLE PART. - [SDR HEEA088011](https://openairdocs.org/sdr/HEEA088011.md): Window · crazed · Jun 23, 2003 · N491PH · Bell 407 · Flight Compartment Windows > LITTER DOOR WINDOW IS CRAZED BEYOND LIMITS. REPLACED WITH SERVICEABLE PART. - [SDR HEEA088010](https://openairdocs.org/sdr/HEEA088010.md): Window · crazed · Jun 23, 2003 · N491PH · Bell 407 · Door Windows > CREW DOOR WINDOW CRAZED BEYOND LIMITS. REPLACED WITH SERVICEABLE PART. - [SDR HEEA088009](https://openairdocs.org/sdr/HEEA088009.md): Window · crazed · Jun 22, 2003 · N491PH · Bell 407 · Door Windows > CRAZED BEYOND LIMITS. REPLACED WITH SERVICEABLE PART. - [SDR HEEA088008](https://openairdocs.org/sdr/HEEA088008.md): Window · crazed · Jun 22, 2003 · N491PH · Bell 407 · Passenger Compartment Windows > LITTER DOOR WINDOW IS CRAZED BEYOND LIMITS. REPLACED WITH SERVICEABLE PART. - [SDR HEEA088007](https://openairdocs.org/sdr/HEEA088007.md): Chin Bubble · crazed · Jun 22, 2003 · N491PH · Bell 407 · Flight Compartment Windows > RIGHT CHIN BUBBLE CRAZED BEYOND LIMITS. REPLACED WITH SERVICEABLE PART. - [SDR HEEA088006](https://openairdocs.org/sdr/HEEA088006.md): Chin Bubble · crazed · Jun 22, 2003 · N491PH · Bell 407 · Flight Compartment Windows > LEFT CHIN BUBBLE CRAZED BEYOND LIMITS. REPLACED WITH SERVICEABLE PART. - [SDR HEEA087999](https://openairdocs.org/sdr/HEEA087999.md): Idler Assy · damaged · Jun 22, 2003 · N491PH · Bell 407 · Main Rotor Control > MAIN ROTOR IDLER ASSY BEARING OUTER RACE TURNING IN IDLER. REPLACED WITH SERVICEABLE PART. - [SDR HEEA087998](https://openairdocs.org/sdr/HEEA087998.md): Idler Assy · ratcheting · Jun 22, 2003 · N491PH · Bell 407 · Main Rotor Control > MAIN ROTOR CONTROL IDLER ASSY HAS BEARINGS RATCHETY. REPLACED WITH SERVICEABLE PART. - [SDR HEEA088020](https://openairdocs.org/sdr/HEEA088020.md): Window · crazed · Jun 21, 2003 · N491PH · Bell 407 · Flight Compartment Windows > COCKPIT WINDOW CRAZED. REPLACED WITH SERVICEABLE PART. - [SDR HEEA088002](https://openairdocs.org/sdr/HEEA088002.md): Cone · peeling · Jun 21, 2003 · N491PH · Bell 407 · Main Rotor Head > MAIN ROTOR HEAD LOWER CONE HAS TEFLON COATING PEELING OFF OF INNER RACE. REPLACED WITH SERVICEABLE PART. - [SDR HEEA088015](https://openairdocs.org/sdr/HEEA088015.md): Leg Assy · worn · Jun 20, 2003 · N491PH · Bell 407 · Engine Mount Section > ENGINE MOUNT LEG ASSY HAS A HOLE WALLED OUT OF LIMITS. REPLACED WITH SERVICEABLE PART. - [SDR HEEA088014](https://openairdocs.org/sdr/HEEA088014.md): Bearing · worn · Jun 20, 2003 · N491PH · Bell 407 · Engine Mount Section > ENGINE BIPOD MOUNT HAS WORN BEARINGS. REPLACED WITH SERVICEABLE PART. - [SDR HEEA087994](https://openairdocs.org/sdr/HEEA087994.md): Tube · corroded · Jun 20, 2003 · N491PH · Bell 407 · Tilt Rotor Flight Control > CORROSION DAMAGED BEYOND LIMITS DUE TO INADEQUATE PROTECTION DURING MFG PROCESS. REPLACED WITH SERVICEABLE PART. - [SDR HEEA088013](https://openairdocs.org/sdr/HEEA088013.md): Crosstube · worn · Jun 19, 2003 · N491PH · Bell 407 · Main Landing Gear Strut/Axle/Truck > MLG CROSSTUBE T-BOLT WORN. REPLACED WITH SERVICEABLE PART. - [SDR HEEA087869](https://openairdocs.org/sdr/HEEA087869.md): Pitot Line · corroded · Jun 17, 2003 · N491PH · Bell 407 · Pitot/Static System > PITOT LINE HAS DEVELOPMENT OF CORROSION DUE TO TREATMENT USED DURING MANUFACTURE PROCESS. REPLACED TUBE. - [SDR HEEA087868](https://openairdocs.org/sdr/HEEA087868.md): Static Line · corroded · Jun 17, 2003 · N491PH · Bell 407 · Pitot/Static System > STATIC LINE HAS DEVELOPMENT OF CORROSION DUE TO TREATMENT USED DURING MANUFACTURE PROCESS. REPLACED TUBE. - [SDR HEEA087867](https://openairdocs.org/sdr/HEEA087867.md): Static Line · corroded · Jun 17, 2003 · N491PH · Bell 407 · Pitot/Static System > STATIC LINE HAS DEVELOPMENT OF CORROSION DUE TO TREATMENT USED DURING MANUFACTURE PROCESS. REPLACED TUBE. - [SDR HEEA087866](https://openairdocs.org/sdr/HEEA087866.md): Static Line · corroded · Jun 17, 2003 · N491PH · Bell 407 · Pitot/Static System > STATIC LINE HAS DEVELOPMENT OF CORROSION DUE TO TREATMENT USED DURING MANUFACTURE PROCESS. REPLACED TUBE. - [SDR HEEA087878](https://openairdocs.org/sdr/HEEA087878.md): Line · corroded · Jun 14, 2003 · N491PH · Bell 407 · Hydraulic System, Main > HYDRAULIC LINE HAS DEVELOPMENT OF CORROSION UNDER SLEEVE DUE TO DISSIMILAR METALS USED DURING MANUFACTURE PROCESS. REPLACED WITH SERVICEABLE PART. - [SDR HEEA087877](https://openairdocs.org/sdr/HEEA087877.md): Line · corroded · Jun 14, 2003 · N491PH · Bell 407 · Hydraulic System, Main > HYDRAULIC LINE HAS DEVELOPMENT OF CORROSION UNDER SLEEVE DUE TO DISSIMILAR METALS USED DURING MANUFACTURE PROCESS. REPLACED WITH SERVICEABLE PART. - [SDR HEEA087876](https://openairdocs.org/sdr/HEEA087876.md): Line · corroded · Jun 14, 2003 · N491PH · Bell 407 · Hydraulic System, Main > HYD LINE HAS DEVELOPMENT OF CORROSION UNDER SLEEVE DUE TO DISSIMILAR METALS USED DURING MANUFACTURE PROCESS. REPLACED WITH SERVICEABLE PART. - [SDR HEEA087860](https://openairdocs.org/sdr/HEEA087860.md): Tube · corroded · Jun 14, 2003 · N491PH · Bell 407 · Main Rotor Gearbox > MAIN ROTOR GEARBOX OIL TUBE HAS CORROSION FOUND UNDER ADEL CLAMP NOT VISIBLE UNTIL REMOVED. REPLACED WITH SERVICEABLE PART. - [SDR HEEA087859](https://openairdocs.org/sdr/HEEA087859.md): Tube · corroded · Jun 14, 2003 · N491PH · Bell 407 · Main Rotor Gearbox > MAIN ROTOR GEARBOX OIL TUBE HAS CORROSION FOUND UNDER ADEL CLAMP NOT VISIBLE UNTIL REMOVED. REPLACED WITH SERVICEABLE PART. - [SDR HEEA087850](https://openairdocs.org/sdr/HEEA087850.md): Windshield · crazed · Jun 14, 2003 · N491PH · Bell 407 · Flight Compartment Windows > WINDSHIELD CRAZED. REPLACED WITH SERVICEABLE PART. - [SDR HEEA087849](https://openairdocs.org/sdr/HEEA087849.md): Windshield · crazed · Jun 14, 2003 · N491PH · Bell 407 · Flight Compartment Windows > WINDSHIELD CRAZED. REPLACED WITH SERVICEABLE PART. - [SDR HEEA087832](https://openairdocs.org/sdr/HEEA087832.md): Door · corroded · Jun 14, 2003 · N491PH · Bell 407 · Nacelle/Pylon, Main Frame > INTAKE COWLING DOOR IS CORRODED AND CHAFED BEYOND LIMITS. REPLACED WITH SERVICEABLE PART. - [SDR HEEA087831](https://openairdocs.org/sdr/HEEA087831.md): Tube · corroded · Jun 14, 2003 · N491PH · Bell 407 · Fuel Storage > FUEL SYSTEM TUBE HAS CORROSION PITTING UNDER SLEEVE DUE TO IMPROPER PROTECTION DURING MANUFACTURING PROCESS. REPLACED WITH SERVICEABLE PART. - [SDR HEEA087505](https://openairdocs.org/sdr/HEEA087505.md): Nut · worn · Jun 12, 2003 · N491PH · Bell 407 · Main Rotor Control > LOW CYCLIC FRICTION - COULD NOT ADJUST DUE TO WORN THREADS. SCRAPPED. - [SDR HEEA087504](https://openairdocs.org/sdr/HEEA087504.md): Nut · worn · Jun 12, 2003 · N491PH · Bell 407 · Main Rotor Control > LOW CYCLIC FRICTION - COULD NOT ADJUST DUE TO WORN THREADS. SCRAPPED. - [SDR HEEA087483](https://openairdocs.org/sdr/HEEA087483.md): Case · corroded · Jun 12, 2003 · N491PH · Bell 407 · Fuselage Miscellaneous Structure > CORRODED UNDER HEAT SHRINK, UNABLE TO DETECT UNTIL REMOVED. - [SDR HEEA087462](https://openairdocs.org/sdr/HEEA087462.md): Igniter · malfunctioned · Jun 12, 2003 · N491PH · Bell 407 · Spark Plug/Igniter > DELAYED LIGHT OFF. REPLACED IGNITER. - [SDR HEEA087461](https://openairdocs.org/sdr/HEEA087461.md): Igniter · contaminated · Jun 12, 2003 · N491PH · Bell 407 · Spark Plug/Igniter > ENGINE LIGHT OFF LATE. IGNITER HAS CARBON BUILD UP. REPLACED IGNITER. - [SDR HEEA087460](https://openairdocs.org/sdr/HEEA087460.md): Igniter · burned · Jun 12, 2003 · N491PH · Bell 407 · Spark Plug/Igniter > DELAYED STARTS. IGNITER BURNED. REPLACED IGNITER. - [SDR HEEA087427](https://openairdocs.org/sdr/HEEA087427.md): Float · failed · Jun 12, 2003 · N491PH · Bell 407 · Emergency Flotation Section > FAILED 6 MONTH INSPECTION. TO BE SENT TO VENDOR FOR REPAIR. - [SDR HEEA087362](https://openairdocs.org/sdr/HEEA087362.md): Structure · cracked · Jun 11, 2003 · N491PH · Bell 407 · Passenger Compartment Equipment > STORAGE BIN CRACKED. - [SDR HEEA087864](https://openairdocs.org/sdr/HEEA087864.md): Headrest · out of adjust · Jun 11, 2003 · N491PH · Bell 407 · Flight Compartment Equipment > HEADREST WILL NOT ADJUST. REPLACED WITH SERVICEABLE PART. - [SDR HEEA087863](https://openairdocs.org/sdr/HEEA087863.md): Headrest · out of adjust · Jun 11, 2003 · N491PH · Bell 407 · Flight Compartment Equipment > HEADREST WILL NOT ADJUST. REPLACED WITH SERVICEABLE PART. - [SDR HEEA087355](https://openairdocs.org/sdr/HEEA087355.md): Cover · cracked · Jun 11, 2003 · N491PH · Bell 407 · Main Rotor Control > MAIN ROTOR CONTROL COVER CRACKED. - [SDR HEEA087282](https://openairdocs.org/sdr/HEEA087282.md): Pin · worn · Jun 11, 2003 · N491PH · Bell 407 · Main Rotor Mast/Swashplate > WORN AND PITTED. TO BE SENT TO MFG. - [SDR HEEA087281](https://openairdocs.org/sdr/HEEA087281.md): Bushing · worn · Jun 11, 2003 · N491PH · Bell 407 · Main Rotor Mast/Swashplate > WORN PIVOT BORE. TO BE SENT TO BELL HELICOPTER. - [SDR HEEA087279](https://openairdocs.org/sdr/HEEA087279.md): Gimbal Ring · corroded · Jun 11, 2003 · N491PH · Bell 407 · Main Rotor Mast/Swashplate > GIMBAL RING, CORRODED. TO BE SENT TO MFG. Next page: https://openairdocs.org/deregistered/N491PH-2025-11-12/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 n_number = 'N491PH' AND deregistration_id = 'N491PH-2025-11-12' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/deregistered/N491PH-2025-11-12/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.