- Date
- June 28, 1990, 15:18 local (23:18 UTC)
- Place
- Torrance, CA
- Injuries
- 1 minor
- Damage
- Substantial damage
- Phase of flight
- Initial climb
- Aircraft
- N350JPHomebuilt JP-350-1
- Weather
- Visual (VMC) · Day
- Status
- Completed · report December 8, 1992
- Report
- Approved by Office Director
- FAA report
- 19900628022749A
- Case key
- 26526
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
Probable cause
The aircraft collision with the ground after the pilot experienced a loss of engine thrust due to propeller overspeed condition. Contributing to the accident was the pilot's improper servicing of the propeller hub that allowed the overspeed to occur.
Sequence of events
NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.
Analysis
The pilot of the homebuilt serviced the propeller hub with 120 PSI prior to departure. After takeoff he lost control of the propeller and the engine lost thrust. Examination of the propeller assembly revealed no evidence of a pre-impact malfunction. The propeller blades had been shortened and the propeller overspeed occurred becasue the blades were not counterweighted. Hartzell stated the 120 PSI charge in the hub was insufficient to counteract the aerodynamic twisting moments and prevent the overspeed.
Aircraft
- Registration
- N350JP
- Reported as
- Homebuilt JP-350-1
- Category
- Airplane, amateur-built
- Serial number
- 88350-1
- Engine
- Lycoming L-1174-61, 350 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Personal · Part 91
- Registered owner
- John G. Parker
- Airworthiness certificate
- Special, Experimental (Special)
- Airport
- TOA · Torrance Muni, runway 29R, 5,000 × 150 ft, asphalt
Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.
Flight crew
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 51
- Certificate
- Airline transport
- Airplane ratings
- Multi-engine land, Single-engine land
- Instrument ratings
- Airplane
- Medical
- Class 1, Valid Medical--w/ waivers/lim
- Seat
- Center
- Flight hours
- 20,000 total · 36 in this make and model · 200 in the last 90 days · 62 in the last 30 days
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 300° at 14 knots
- Visibility
- 9 statute miles
- Lowest ceiling
- None
- Temperature
- 75 °F, dew point -0 °F
- Altimeter
- 29.00 inHg
- Observed at
- TOA
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.