# Service difficulty reports: N501PH, cancelled Apr 19, 2025 A list on [N501PH, cancelled Apr 19, 2025](https://openairdocs.org/deregistered/N501PH-2025-04-19.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 2 · 80 reports - [SDR HEER20141020174](https://openairdocs.org/sdr/HEER20141020174.md): Bearing · spalled · Oct 20, 2014 · N501PH · Bell 407 · Turbine Section > ENGINE REMOVED 10-14-14 DUE TO METAL IN OIL. NR 5 BEARING REMOVED DUE TO POSSIBLE SPALLING AT OUTER RACE SPLIT. REPLACED WITH NEW PART AND RETURNED TO MFG FOR FURTHER EVALUATION. - [SDR HEEA2012010832853](https://openairdocs.org/sdr/HEEA2012010832853.md): Bearing · spalled · Jan 8, 2012 · N501PH · Bell 407 · Turbine Section > TURBINE REMOVED DUE TO METAL IN OIL. UPON INSPECTION OF NR 5 BEARING FOUND SPALLING ON OUTER RACE. REPLACED WITH NEW. - [SDR HEEA131869](https://openairdocs.org/sdr/HEEA131869.md): Structure · corroded · Aug 9, 2011 · N501PH · Bell 407 · Fuselage Structure (General) > FWD LOWER SHELL ASSY WAS FOUND TO BE CORRODED (1PL). - [SDR HEEA20110809001](https://openairdocs.org/sdr/HEEA20110809001.md): Panel · corroded · Aug 9, 2011 · N501PH · Bell 407 · Fuselage Main, Plate/Skin > ROOF PANEL WAS FOUND TO BE CORRODED (1PL) COMMON TO TRANSMISSION PYLON SHIM INSTALLATION. THE ROOF PANEL ASSY WILL THEN BE REPAIRED IAW THE FAA-APPROVED REPAIR DATA. - [SDR HEEA129880](https://openairdocs.org/sdr/HEEA129880.md): Bearing · spalled · Nov 23, 2010 · N501PH · Bell 407 · Turbine Section > ENGINE REMOVED FOR TURBINE O/H. NR5 BRG EXHIBITED SPALLING ON OUTER RACE AND BALLS. REPLACED NR5 BRG. - [SDR HEEA087486](https://openairdocs.org/sdr/HEEA087486.md): Relay · malfunctioned · Jun 12, 2003 · N501PH · Bell 407 · Main Rotor Indicating System > RELAY CAUSING DEGRADE LIGHT. - [SDR HEEA087471](https://openairdocs.org/sdr/HEEA087471.md): Battery · corroded · Jun 12, 2003 · N501PH · Bell 407 · Global Positioning System > BATTERY FAILED. FOUND MEMORY BATTERY BAD AND CORROSION ON PRINTED CIRCUIT BOARDS. REPLACED MEMORY BATTERY AND CLEANED CORROSION. BENCH CHECK GOOD. - [SDR HEEA087382](https://openairdocs.org/sdr/HEEA087382.md): Panel · cracked · Jun 11, 2003 · N501PH · Bell 407 · Fuselage Miscellaneous Structure > INTERIOR PANEL CRACKED. - [SDR HEEA087376](https://openairdocs.org/sdr/HEEA087376.md): Panel · cracked · Jun 11, 2003 · N501PH · Bell 407 · Fuselage Miscellaneous Structure > HEADLINER PANEL CRACKED. - [SDR HEEA087374](https://openairdocs.org/sdr/HEEA087374.md): Panel · cracked · Jun 11, 2003 · N501PH · Bell 407 · Flight Compartment Equipment > SEAT PANEL CRACKED. - [SDR HEEA087356](https://openairdocs.org/sdr/HEEA087356.md): Trim Panel · cracked · Jun 11, 2003 · N501PH · Bell 407 · Fuselage Miscellaneous Structure > TRIM PANEL CRACKED ALONG EDGES BEYOND REPAIR. - [SDR HEEA087346](https://openairdocs.org/sdr/HEEA087346.md): Tube · leaking · Jun 11, 2003 · N501PH · Bell 407 · Main Rotor Gearbox > FLARE IS WORN AND UNABLE TO STOP LEAK. - [SDR HEEA087313](https://openairdocs.org/sdr/HEEA087313.md): Blade · damaged · Jun 11, 2003 · N501PH · Bell 407 · Main Rotor Blades > SEALANT MISSING FROM ROOT END. CORROSION AT WEIGHT POCKET, HOLE ALONG TIP ABOVE BLADE TIE DOWN BRACKET. SERIAL NUMBERS REMOVED ARE A2029, A2041, A2060 AND A2061. TO BE SENT TO VENDOR FOR REPAIR. - [SDR HEEA087298](https://openairdocs.org/sdr/HEEA087298.md): Frahm · broken · Jun 11, 2003 · N501PH · Bell 407 · Main Rotor Head > FRAHM ASSY HAS A BROKEN SPRING. REPLACED SPRING (2 EA) 407310104105 DUE TO BROKEN. REPAIRED. - [SDR HEEA087288](https://openairdocs.org/sdr/HEEA087288.md): Idler Assy · binding · Jun 11, 2003 · N501PH · Bell 407 · Main Rotor Control > MAIN ROTOR CONTROL IDLER ASSY BEARINGS BINDING. REPAIRED. - [SDR HEEA087019](https://openairdocs.org/sdr/HEEA087019.md): Gimbal Ring · corroded · Jun 4, 2003 · N501PH · Bell 407 · Main Rotor Mast/Swashplate > CORROSION BLEEDING OUT OF STEEL BUSHINGS THAT ARE INSERTED INTO THE ALUMINUM GIMBAL. TO BE SENT TO BELL FOR CREDIT. - [SDR HEEA086979](https://openairdocs.org/sdr/HEEA086979.md): Transmitter · inoperative · Jun 3, 2003 · N501PH · Bell 407 · Fuel Pressure Indicator > TRANSMITTER INOPERATIVE, NO PRESSURE INDICATION. SENT TO MFG FOR CREDIT. - [SDR HEEA086971](https://openairdocs.org/sdr/HEEA086971.md): Bearing · worn · Jun 3, 2003 · N501PH · Bell 407 · Rotorcraft Servo System > BEARING THAT RT CYCLIC CONTROL TUBE CONNECTS TO HAS EXCESSIVE RADIAL PLAY. TO BE SENT TO MFG FOR CREDIT. - [SDR HEEA086953](https://openairdocs.org/sdr/HEEA086953.md): Skid · corroded · Jun 3, 2003 · N501PH · Bell 407 · Wheel/Ski/Float > DISSIMILAR METAL CORROSION AROUND THE FLOAT BAG MOUNT INSERTS. TO BE SENT TO VENDOR. - [SDR HEEA086952](https://openairdocs.org/sdr/HEEA086952.md): Skid · corroded · Jun 3, 2003 · N501PH · Bell 407 · Wheel/Ski/Float > DISSIMILAR METAL CORROSION AROUND THE FLOAT BAG MOUNT INSERTS. TO BE SENT TO VENDOR. - [SDR HEEA086951](https://openairdocs.org/sdr/HEEA086951.md): Strap · corroded · Jun 3, 2003 · N501PH · Bell 407 · Main Landing Gear Attach Section > STRAP ASSY CORRODED, UNABLE TO DETECT CORROSION UNTIL PAINT REMOVAL. TO BE SENT TO VENDOR. - [SDR HEEA084322](https://openairdocs.org/sdr/HEEA084322.md): Pressure Switch · malfunctioned · Feb 11, 2003 · N501PH · Bell 407 · Fuel Pressure Indicator > BOOST PUMP LIGHT NOT ILLUMINATING. REPLACED FUEL CELL PRESSURE SWITCH. - [SDR HEEA084293](https://openairdocs.org/sdr/HEEA084293.md): Spring · worn · Feb 11, 2003 · N501PH · Bell 407 · Main Rotor Transmission Mount > MAIN ROTOR GEARBOX MOUNT BEARING WORN; BOOT STRETCHED. - [SDR HEEA083993](https://openairdocs.org/sdr/HEEA083993.md): Washer · debonded · Jan 17, 2003 · N501PH · Bell 407 · Engine Collector/Tailpipe/Nozzle > EXHAUST DUCT BUFFER WASHER UNBONDED. - [SDR HEEA083986](https://openairdocs.org/sdr/HEEA083986.md): Duct · cracked · Jan 17, 2003 · N501PH · Bell 407 · Engine Collector/Tailpipe/Nozzle > EXHAUST DUCT CRACKED. - [SDR HEEA083918](https://openairdocs.org/sdr/HEEA083918.md): Bellcrank · debonded · Jan 17, 2003 · N501PH · Bell 407 · Main Rotor Head > MAIN ROTOR HEAD BELLCRANK RUBBER IS DEBONDED. - [SDR HEEA083915](https://openairdocs.org/sdr/HEEA083915.md): Bellcrank · debonded · Jan 17, 2003 · N501PH · Bell 407 · Main Rotor Head > MAIN ROTOR HEAD BUFFER WASHER, RUBBER DEBONDING. - [SDR HEEA083914](https://openairdocs.org/sdr/HEEA083914.md): Bellcrank · debonded · Jan 17, 2003 · N501PH · Bell 407 · Main Rotor Head > MAIN ROTOR HEAD BELLCRANK BUFFER WASHER, RUBBER DEBONDING. T - [SDR HEEA083896](https://openairdocs.org/sdr/HEEA083896.md): Boot · torn · Jan 17, 2003 · N501PH · Bell 407 · Main Rotor Mast/Swashplate > MAIN ROTOR BOOT IS TORN AND RIPPED. - [SDR HEEA083863](https://openairdocs.org/sdr/HEEA083863.md): Shaft · corroded · Jan 16, 2003 · N501PH · Bell 407 · Tail Rotor Gearbox > TAIL ROTOR GEARBOX OUTPUT SHAFT HAS EXCESSIVE PITTING ON SPLINES. OUTPUT CAP 406040408101, SN AFS1424 BEARING LINER WORN BEYOND LIMITS. REPAIRED. - [SDR HEEA083846](https://openairdocs.org/sdr/HEEA083846.md): Bushing · worn · Jan 16, 2003 · N501PH · Bell 407 · Main Rotor Mast/Swashplate > MAIN ROTOR PITCH CHANGE LEVER BUSHINGS WORN. - [SDR HEEA083845](https://openairdocs.org/sdr/HEEA083845.md): Bushing · worn · Jan 16, 2003 · N501PH · Bell 407 · Main Rotor Mast/Swashplate > MAIN ROTOR PITCH CHANGE LEVER BUSHINGS WORN. - [SDR HEEA083839](https://openairdocs.org/sdr/HEEA083839.md): Bushing · worn · Jan 16, 2003 · N501PH · Bell 407 · Main Rotor Mast/Swashplate > MAIN ROTOR HEAD BUSHING SET WORN. - [SDR HEEA083833](https://openairdocs.org/sdr/HEEA083833.md): Link · worn · Jan 16, 2003 · N501PH · Bell 407 · Main Rotor Mast/Swashplate > MAIN ROTOR LINK ASSY WORN. - [SDR HEEA083829](https://openairdocs.org/sdr/HEEA083829.md): Lever · worn · Jan 16, 2003 · N501PH · Bell 407 · Main Rotor Drive System > MAIN ROTOR LEVER ASSY WORN. - [SDR HEEA083781](https://openairdocs.org/sdr/HEEA083781.md): Liner · cracked · Jan 15, 2003 · N501PH · Bell 407 · Turbine Engine Compressor Section > CRACKS AROUND THE INSIDE EDGE OF LINER AT END THAT MOUNTS TO SHIELD. REPLACED WITH SERVICEABLE PART. - [SDR HEEA083772](https://openairdocs.org/sdr/HEEA083772.md): Engine · making metal · Jan 15, 2003 · N501PH · Bell 407 · Engine (Turbine/Turboprop) > ENGINE MAKING METAL. REPLACED WITH SERVICEABLE ENGINE. - [SDR HEEA083767](https://openairdocs.org/sdr/HEEA083767.md): Shield · cracked · Jan 15, 2003 · N501PH · Bell 407 · Turbine Section > NR 1 NOZZLE SHIELD CRACK AT CENTER OF SHIELD DOME. REPLACED WITH SERVICEABLE PART. - [SDR HEEA083747](https://openairdocs.org/sdr/HEEA083747.md): Bleed Valve · failed · Jan 15, 2003 · N501PH · Bell 407 · Compressor Bleed Valve > CAUSING HIGHER THAN NORMAL MGT READINGS. REPLACED BLEED VALVE. - [SDR HEEA083739](https://openairdocs.org/sdr/HEEA083739.md): Connector · damaged · Jan 15, 2003 · N501PH · Bell 407 · Fuel System Wiring > "B" PIN LOOSE CAUSING FUEL FILTER LIGHT IN COCKPIT TO ILLUMINATE ON CAUTION PANEL. - [SDR HEEA083735](https://openairdocs.org/sdr/HEEA083735.md): Filter · malfunctioned · Jan 15, 2003 · N501PH · Bell 407 · Aircraft Fuel Filter/Strainer > INTERMITTENT FUEL FILTER LIGHT. - [SDR HEEA083696](https://openairdocs.org/sdr/HEEA083696.md): Duct · cracked · Jan 15, 2003 · N501PH · Bell 407 · Engine Collector/Tailpipe/Nozzle > EXHAUST DUCT CRACKED AT BOTH ENDS. - [SDR HEEA083694](https://openairdocs.org/sdr/HEEA083694.md): Brushes · worn · Jan 15, 2003 · N501PH · Bell 407 · Starter-Generator > STARTER GEN BRUSHES WORN. - [SDR HEEA083674](https://openairdocs.org/sdr/HEEA083674.md): Cover · torn · Jan 15, 2003 · N501PH · Bell 407 · Emergency Flotation Section > EMERGENCY FLOAT COVER WORN, TORN, VELCRO LOOSE. - [SDR HEEA083665](https://openairdocs.org/sdr/HEEA083665.md): Check Valve · damaged · Jan 14, 2003 · N501PH · Bell 407 · Fuel Controlling System > CHECK VALVE FLARE END NICKED CAUSING LEAK. REPAIRED. - [SDR HEEA080273](https://openairdocs.org/sdr/HEEA080273.md): Mount · contaminated · Jun 27, 2002 · N501PH · Bell 407 · Tail Rotor Head > MOUNT OIL SOAKED. - [SDR HEEA080257](https://openairdocs.org/sdr/HEEA080257.md): Bipod Mount · worn · Jun 27, 2002 · N501PH · Bell 407 · Engine Mount Section > ENGINE BIPOD MOUNT WORN. - [SDR HEEA080240](https://openairdocs.org/sdr/HEEA080240.md): Frahm · broken · Jun 27, 2002 · N501PH · Bell 407 · Main Rotor Head > BROKEN FRAHM ASSY SPRING. - [SDR HEEA080236](https://openairdocs.org/sdr/HEEA080236.md): Bellcrank · debonded · Jun 27, 2002 · N501PH · Bell 407 · Main Rotor Head > BELLCRANK HAS BUSHINGS DISBONDED. - [SDR HEEA080190](https://openairdocs.org/sdr/HEEA080190.md): Brushes · worn · Jun 26, 2002 · N501PH · Bell 407 · Starter-Generator > STARTER GEN BRUSHES WORN. Next page: https://openairdocs.org/deregistered/N501PH-2025-04-19/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 = 'N501PH' AND deregistration_id = 'N501PH-2025-04-19' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/deregistered/N501PH-2025-04-19/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.