# Accident 19980715037659A: Boeing A75N1, West Milford, NJ, July 15, 1998

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: July 15, 1998, 18:31 local time
- Place: West Milford, NJ
- Airport: Greenwood Lake Airport
- Damage: Substantial damage
- Phase of flight: Touch And Go Landing
- Operating rules: General operating rules (Part 91)
- Location: 41.1284° N, 74.3465° W: Placed by OpenAirDocs at GREENWOOD LAKE (4N1), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=41.1284&lon=-74.3465&mi=10
- Aircraft: N60019 (not matched to a registry record)
- Reported make and model: BOEING A75N1
- Reported engine: LYC R68013
- People aboard: 2
- Fatal injuries: 0
- Pilot flight hours: 2,900 total, 400 in this make and model, 36 in the last 90 days
- NTSB investigation: [NTSB IAD98LA079](https://openairdocs.org/ntsb/IAD98LA079) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19980715037659A

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

(-23) ENGINE LOST POWER AFTER TOUCH AND GO AT APPROXIMATELY 50 FT AGL. AIRCRAFT DESCENDED INTO WOODED AREA TO THE RIGHT OF RUNWAY CENTERLINE APPROXIMATELY 1/2 MILE FROM RUNWAY 24. ON SCENE INVESTIGATION REVEALED THAT THE ENGINE PRIMER KNOB WAS UNLOCKED AND EXTENDED APPROXIMATELY 1/4 INCH, THE THROTTLE WAS APPROXIMATELY 70% OPEN; PROPELLER LEVER WAS FULL FORWARD, MIXTURE FULL FORWARD, CARB HEAT FULL FORWARD, AND FUEL SHUTOFF VALVE WAS OFF. THE FUEL SHUTOFF VALVE WAS PLACED TO OFF BY THE PILOT AFTER THE ACCIDENT. THE AIRCRAFT HAD APPROXIMATELY 30 GALS FUEL ON BOARD AT TIME OF THE ACCIDENT. A FUEL SAMPLE WAS TAKEN FROM THE AIRCRAFT, AND THERE WAS NO EVIDENCE OF FUEL CONTAMINATION. THE FUEL TRUCK FROM WHICH THE AIRCRAFT WAS REFUELED WAS TESTED, AND THERE WAS NO CONTAMINATION. INSPECTION OF THE ENGINE AND ASSOCIATED CONTROLS AT THE SCENE REVEALED NO OBVIOUS PROBLEM THAT WOULD RESULT IN ENGINE FAILURE. A RUN UP OF THE ENGINE WAS PERFORMED AFTER THE AIRCRAFT WAS REMOVED FROM THE TREES AND TRANSPORTED TO GREENWOOD LAKE AIRPORT. THE ENGINE STARTED NORMALLY AND WAS RUN THROUGH ITS FULL OPERATING RANGE. CARBURETOR HEAT WAS APPLIED AT VARIOUS POWER SETTINGS AND THE ENGINE CONTINUED TO RUN     WITH THE EXPECTED DROP IN RPM. THE ENGINE CONTINUED TO OPERATE AND OUR INVESTIGATION WAS UNABLE TO DUPLICATE ANY CONDITIONS RESULTING IN A LOSS OF POWER. (.4) THE ENGINE RUN-UP CHECK, TAKEOFF, CLIMB, AND EN ROUTE PHASE OF THE FLIGHT WERE NORMAL. THE AIRPLANE ENTERED THE DOWNWIND FOR A TOUCH AND GO LANDING, AND THE PILOT SELECTED CARBURETOR HEAT-ON. THE AIRPLANE TOUCHED DOWN, AND THE PILOT ADDED FULL THROTTLE, AND SELECTED CARBURETOR HEAT-OFF. ABOUT 50 FEET AGL, THE PILOT REALIZED THE ENGINE WAS NOT PRODUCING FULL POWER. HE DID NOT NOTICE ANY BACKFIRING, SMOKE, OR UNUSUAL VIBRATION FROM THE ENGINE, JUST A LACK OF POWER. WITH INSUFFICIENT RUNWAY REMAINING, HE MADE A TURN TO THE WEST TO AVOID A CLIFF ON THE DEPARTURE END OF THE RUNWAY. THE AIRPLANE SETTLED INTO THE TREES, AND THE TWO OCCUPANTS EGRESSED THE AIRPLANE. WHILE ATTACHED TO THE AIRFRAME THE ENGINE WAS RUN THROUGH ITS FULL OPERATING RANGE, AND NO PRE IMPACTED FAILURES WERE IDENTIFIED. THE ENGINE PRIMER WAS FOUND UNLOCKED AND OUT 1/4 OF AN INCH. ACCORDING TO THE ICING PROBABILITY CHART IN, 'TIPS ON WINTER FLYING,' THE ACCIDENT WEATHER CONDITIONS WERE CONDUC                                                                       IVE FOR SERIOUS ICING WITH GLIDE POWER. IN ADDITION, THE PUBLICATION STATED THAT, 'IT IS RECOMMENDED THAT CARBURETOR HEAT BE APPLIED BEFORE REDUCING POWER AND THAT PARTIAL POWER BE USED DURING LETDOWN TO PREVENT ICING, AND OVERCOOLING THE ENGINE.'

## 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 IAD98LA079](https://openairdocs.org/ntsb/IAD98LA079), Jul 15, 1998: Boeing A75N1 (PT17) (N60019), West Milford, NJ, substantial damage. Probable cause: Loss of engine power for undetermined reasons.

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.

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