# NTSB LAX92LA297: Krug Lincoln Sportplane, N377JK, Corona, CA, July 14, 1992

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 14, 1992, 06:30 local (13:30 UTC)
- Place: Corona, CA
- Coordinates: 36.379226, -120.129699 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=36.3792&lon=-120.1297&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report June 30, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 27686
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX92LA297
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/27686/pdf
- Page: https://openairdocs.org/ntsb/LAX92LA297

## Probable cause

THE PILOT/BUILDER INADEQUATE PROPELLER COMPONENT RESULTING IN AN INADEQUATE CLIMB PERFORMANCE.   CONTRIBUTING TO THIS ACCIDENT WAS THE AIRPLANE'S INABILITY TO CLIMB.

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- In flight collision with object, takeoff - initial climb
  - object - tree(s)
  - aircraft performance,climb capability - inadequate (cause)
  - climb - not possible, pilot in command (contributing factor)
  - acft/equip,inadequate aircraft component, manufacturer (cause)
- In flight collision with terrain/water, descent - uncontrolled
  - terrain condition - high obstruction(s)

## Analysis

THE PILOT/BUILDER COMPLETED A HIGH SPEED TAXI TEST ON THE RUNWAY BEFORE DEPARTING ON THE EXPERIMENTAL AIRPLANE'S FIRST FLIGHT.  DURING THE TAKEOFF THE AIRPLANE FAILED TO CLIMB AFTER IT TRANSITIONED FROM GROUND EFFECT. THE ENGINE RPM WAS ADEQUATE, BUT THE AIRPLANE WOULD NOT CLIMB.  THE REMAINING RUNWAY WAS INADEQUATE FOR A LANDING AND THE PILOT ATTEMPTED TO GAIN ALTITUDE BY INCREASING THE FLYING SPEED, BUT TO NO AVAIL.  THE ALTITUDE WAS INSUFFICIENT AND THE AIRPLANE COLLIDED WITH THE TREES AT THE END OF THE RUNWAY.  THE PILOT/BUILDER REPORTED THAT THE PROPELLER THRUST EFFICIENCY WAS INADEQUATE TO PRODUCE THE REQUIRED THRUST FOR CLIMB.

## Aircraft

- Registration: [N377JK](https://openairdocs.org/deregistered/N377JK-2009-07-27), registration cancelled 2009-07-27, S/N 1 (OpenAirDocs)
- Reported make and model: KRUG LINCOLN SPORTPLANE (LINCOLN SP)
- Registry model: [Krug John A LINCOLN SPORTPLANE](https://openairdocs.org/model/krug-john-a-lincoln-sportplane) (registry code 0561123) (OpenAirDocs)
- Registry engine: [Volkswagen CONVERSION](https://openairdocs.org/engine/volkswagen-conversion) (registry code 63501, reciprocating) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: 1
- Airframe hours: 1
- Engines: VOLKSWAGEN 1600 CC 41 horsepower reciprocating
- Damage: Substantial damage
- Flight: Part 91
- Operator: Krug, John A.
- Registered owner: Krug, John A.
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Annual, June 19, 1992, 1 hours before
- Departed: L66
- Destination: L66
- Airport: L66, Corona Municipal, runway 25, 3,200 × 60 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 48; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: center; flight hours: 371 total, 1 in this make and model, 318 as pilot in command

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 70 °F

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19920714025519A](https://openairdocs.org/incident/19920714025519A), Jul 14, 1992: Amtr SPORTBIPLANE, Corona, CA, Substantial damage. Unable to climb on first test flight. Struck trees. Propeller inadequate to provide adequate thrust.

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.

---
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.