# NTSB LAX93LA171: Mong SPORT-S, N36JD, Fallbrook, CA, April 10, 1993

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: April 10, 1993, 12:00 local (19:00 UTC)
- Place: Fallbrook, CA
- Coordinates: 33.389389, -117.210006 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=33.3894&lon=-117.2100&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed, report February 10, 1994
- Report: Approved by Office Director
- NTSB case key (mKey): 27956
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX93LA171
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/27956/pdf
- Page: https://openairdocs.org/ntsb/LAX93LA171

## Probable cause

FAILURE OF THE PILOT TO VISUALLY CLEAR THE RUNWAY BEFORE STARTING THE TAKEOFF GROUND RUN.  FACTORS IN THE ACCIDENT WERE INADEQUATE AIRSPEED AT THE TIME OF LIFTOFF WHICH RESULTED IN AN AERODYNAMIC STALL.

## Sequence of events

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

- Abrupt maneuver, takeoff - roll/run
  - visual lookout - inadequate, pilot in command (cause)
- Loss of control - in flight, takeoff - initial climb
  - airspeed - inadequate, pilot in command (contributing factor)
  - stall - inadvertent, pilot in command (contributing factor)
- In flight collision with terrain/water, descent - uncontrolled
  - terrain condition - downhill

## Analysis

A MONG SPORT S HOME BUILT COLLIDED WITH TERRAIN AFTER AN IN FLIGHT LOSS OF CONTROL DURING A PREMATURE LIFTOFF AND ABORTED TAKEOFF. THE AIRPLANE IS EQUIPPED WITH CONVENTIONAL LANDING GEAR. THE PILOT TAXIED ONTO THE RUNWAY BEHIND A DEPARTING AIRPLANE.  AS THE PILOT STARTED HIS TAKEOFF ROLL, HIS FORWARD VISION WAS OBSTRUCTED BY THE ENGINE COWLING. WHEN THE PILOT LIFTED THE TAILWHEEL, HE SAW THE OTHER AIRPLANE STILL ON THE RUNWAY AND ABORTED THE TAKEOFF.  THE PILOT THEN LIFTED HIS AIRPLANE OFF THE RUNWAY AND TURNED TO AVOID A COLLISION WITH THE OTHER AIRPLANE ON THE RUNWAY. THE ACCIDENT AIRPLANE THEN STALLED, DESCENDED UNCONTROLLED, AND COLLIDED WITH DOWNSLOPING TERRAIN ADJACENT TO THE AIRPORT.

## Aircraft

- Registration: [N36JD](https://openairdocs.org/deregistered/N36JD-1999-05-22), registration cancelled 1999-05-22, S/N 1 (OpenAirDocs)
- Reported make and model: MONG SPORT-S
- Registry model: [Dormer John D G MONG SPORT-S](https://openairdocs.org/model/dormer-john-d-g-mong-sport-s) (registry code 05613ZD) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: 001
- Airframe hours: 303
- Engines: CONTINENTAL C-90-14F 90 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Dormer, John D.
- Registered owner: Dormer, John D.
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Annual, May 12, 1992, 35 hours before
- Airport: L18, Fallbrook Airpark, runway 18, 2,100 × 75 ft

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 59; commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: front; flight hours: 4,721 total, 303 in this make and model, 4,613 as pilot in command, 14 in the last 90 days, 4 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 240° at 8 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Altimeter: 30.00 inHg
- Observed at: CRQ, 14 nm away

## 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 19930410008789A](https://openairdocs.org/incident/19930410008789A), Apr 10, 1993: Kinner SPORTSTERB, Fallbrook, CA, Substantial damage. Began takeoff close behind other traffic. Blind forward until tail up. Traffic aborted. Stalled on pullup to avoid.

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.