# Accident 20040922035579A: Boeing A75N1, Bayport, NY, September 22, 2004 - Type: FAA accident report (Accident/Incident Data System), as reported - Date: September 22, 2004, 16:30 local time - Place: Bayport, NY - Airport: Bayport Aerodrome Airport - Damage: Destroyed - Phase of flight: Forced/Precautionary Landing - Operating rules: General operating rules (Part 91) - Location: 40.7586° N, 73.0517° W: From the FAA - Nearby events: https://openairdocs.org/map.md?lat=40.7586&lon=-73.0517&mi=10 - Aircraft: N57003, registered now (https://openairdocs.org/aircraft/N57003) (OpenAirDocs) - Registry model: Boeing A75N1(PT17) (registry code 1380134, https://openairdocs.org/model/boeing-a75n1-pt17) (OpenAirDocs) - Registry engine: Continental W670 series (registry code 17018, https://openairdocs.org/engine/continental-w670-series) (OpenAirDocs) - Reported make and model: BOEING A75N1 - Reported engine: CONT W670* - Fatal injuries: 0 - Pilot flight hours: 4,300 total, 250 in this make and model, 20 in the last 90 days - NTSB investigation: [NTSB IAD04LA048](https://openairdocs.org/ntsb/IAD04LA048) (OpenAirDocs) - FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/) - Page: https://openairdocs.org/incident/20040922035579A ## Narrative As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^. (-23) ON 9/22/04 AT APPROX. 16:30L, N57003, A STEARNUM B-75-A75N1 CRASHED SHORTLY AFTER T/O AT BAYPORT AERODROME IN BAYPORT, NEW YORK. ^PRIVACY DATA OMITTED^ WAS THE STATED PILOT OF THIS A/C AND WAS IN THE AFT SEAT. ^PRIVACY DATA OMITTED WAS THE STATED PASSENGER IN THE A/C AND WAS IN THE FORWARD SEAT. THE A/C TOOK OFF ON RUNWAY 18R WITH AN APPROXIMATELY 8 KNOT NW WIND. THE PILOT STATED HE CLIMBED TO APPROXIMATELY 300' AND HAD FULL POWER AT ABOUT 1800 RPM. HE STATED HE THEN LOST ABOUT 300-400 RPM, WAS UNABLE TO RETURN TO THE RUNWAY AND REDUCED POWER JUST BEFORE THE A/C CRASHED. THE A/C CAME DOWN JUST EAST OF THE AIRPORT HITTING A TREE, A TELEPHONE POLE, A ROOF OF A HOUSE AND TURNING UPSIDE DOWN COMING TO REST ON THE FRONT LAWN AT ^PRIVACY DATA OMI^ THE A/C AIRFRAME WAS DESTROYED; THE ENGINE WAS BASICALLY INTACT; THE PILOT AND PSGR HAD MINOR INJURIES AND NO ONE WAS INJURED IN THE HOUSE OR ON THE GROUND. THE A/C HAD OVER 30 GALLONS OF FUEL THAT WAS SIPHONED FROM THE TANK, A FUEL SAMPLE WAS TAKEN AND NO VISIBLE WATER IN FUEL (AV GAS). UPON FURTHER INSPECTION THE FOLLOWING ITEMS WERE FOUND: OIL SCREEN CLEAN, NO MAGNETIC PARTICLES FOUND; CARBURETOR & FUEL LINES CLEAN, ENGI NE INTACT. THE FRONT SEVEN ENGINE PLUGS WERE PULLED AND ALL SEVEN CYLINDERS WERE CHECKED FOR COMPRESSION VIA THUMB CHECK AND FOUND TO BE OKAY. THE REAR PLUGS WERE ALSO PULLED AND ALL 14 PLUGS WERE PHYSICALLY INSPECTED AND LOOKED OKAY. THE ENGINE TURNED THROUGH WITH NO EVIDENCE OF BINDING, THE PLUG HARNESS LOOKED OKAY; THERE WAS NO SIGN OF CHAFING OR BROKEN CONTACTS. THE ENGINE AND THROTTLE CONTROLS SHOWED CONTINUITY. THE CARBURETOR HEAT WAS OPERATIONAL. THE LEFT AND RIGHT MAGNETOS WERE CHECKED WHILE ON THE ENGINE FOR SPARK. THE LEFT MAGNETO WAS OKAY AND PRODUCING SPARK. THE RIGHT MAGNETO WAS NOT PRODUCING ANY SPARK. BOTH MAGNETOS WERE THEN REMOVED FROM THE A/C AND CARRIED TO TELEDYNE/MATTITUCK AN ENGINE CERTIFIED REPAIR STATION WHERE THEY WERE STATICALLY CHECKED. THE RIGHT MAGNETO GOVERNS THE FRONT SEVEN SPARK PLUGS AND IF IT DID FAIL THE ENGINE WOULD ONLY HAVE SPARK TO THE SEVEN REAR PLUGS. THIS A/C HAS A SEVEN CYLINDER RADIAL CONTINENTAL ENGINE, MODEL W670, WHICH PRODUCES 270 HORSEPOWER. ^PRIVACY DATA OM^ A CONTINENTAL ENGINE REPRESENTATIVE FROM MOBILE, ALABAMA, WAS CONTACTED BY THIS FSDO AND HE STATES IF THE A/C LOST A MAGNETO IT WOULD LOSE APPROXIMATELY 300 TO 400 RPM. THE PILOT OF THIS A/C HAD STATED THAT, ON T/O HE HAD APPROXIMATELY 1800 RPM ON T/O ROLL AND LOST ABOUT 300-400 RPM. THE RESULTS AT MATTITUCK WERE INCONCLUSIVE AND REVEALED NO SPARK ON EITHER THE LEFT OR THE RIGHT MAGNETO. MATTITUCK DID NOT HAVE THE PROPER DISTRIBUTOR BLOCKS FOR THESE BENDIX MAGNETOS AND COULD NOT BE SURE THEY WERE REMOVING THE GROUNDS, AS REQUIRED TO TEST THIS TYPE MAGNETO. ## The NTSB's investigation of this event (1) From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [NTSB IAD04LA048](https://openairdocs.org/ntsb/IAD04LA048), Sep 22, 2004: Boeing A75N (PT17) (N57003), Bayport, NY, substantial damage. Probable cause: The failure of a magneto, which resulted in a loss of engine power. Factors in the accident were the pilot's decision to take off downwind, which resulted in reduced airplane performance, and the… From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record. --- 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.