# NTSB LAX93LA364: Mcinroy DER Jager DIX, N16RM, Hesperia, CA, September 21, 1993

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: September 21, 1993, 13:00 local (20:00 UTC)
- Place: Hesperia, CA
- Coordinates: 34.360198, -117.320877 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=34.3602&lon=-117.3209&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 August 1, 1994
- Report: Approved by Office Director
- NTSB case key (mKey): 28485
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX93LA364
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/28485/pdf
- Page: https://openairdocs.org/ntsb/LAX93LA364

## Probable cause

FAILURE OF THE PILOT TO LEAN THE AIRCRAFT'S FUEL MIXTURE FOR THE  AIRPORT'S DENSITY ALTITUDE.

## Sequence of events

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

- Loss of control - in flight, takeoff - initial climb
  - weather condition - high density altitude (contributing factor)
  - mixture - improper use of, pilot in command (cause)
- In flight collision with terrain/water, descent - uncontrolled
  - terrain condition - open field

## Analysis

THE PILOT FAILED TO LEAN THE AIRPLANE'S FUEL MIXTURE BEFORE TAKEOFF.  THE AIRPLANE CLIMBED TO AN ALTITUDE OF 20 FEET ABOVE THE GROUND THEN SETTLED TO THE GROUND AND COLLIDED WITH THE TERRAIN.

## Factual narrative

On September 21, 1993, at 1300 hours Pacific daylight time, an amateur built McInroy Der Jager DIX airplane, N16RM, collided with the terrain after experienceing an inflight loss of control shortly after departing Runway 21 at the Hesperia Airport, Hesperia, California.  The airplane, registered to and operated by the pilot, was substantially damaged.  The certificated private pilot was not injured.  Visual meteorological conditions prevailed at the time.  The flight was destined for Trona, California.

The pilot reported to the Federal Aviation Admnistration (FAA), Riverside Flight Standards District Office, that he had just refueled the airplane.  He stated he failed to lean the fuel mixture for the airport's high density altitude.  After departing runway 21, the airplane climbed to an altitude of 20 feet above the ground and then settled to the ground over an open field southwest of the airport.

The pilot indicated his total flight experience was about 3,000 hours of which 10 hours were in the accident airplane make and model.

## Aircraft

- Registration: [N16RM](https://openairdocs.org/deregistered/N16RM-1994-03-29), registration cancelled 1994-03-29, S/N 165 (OpenAirDocs)
- Reported make and model: MCINROY DER JAGER DIX (DER JAGER)
- Registry model: [Mcinroy DER JAGER DIX](https://openairdocs.org/model/mcinroy-der-jager-dix) (registry code 05629BF) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: 165
- Airframe hours: 260
- Engines: LYCOMING O-235-C1 115 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Ramer, Fred M.
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Annual, September 18, 1993, 1 hours before
- Destination: L72, TRONA, CA
- Airport: L26, Hesperia, runway 21, 3,910 × 50 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 71; private; airplane ratings: single-engine land; medical: expired; seat: center; flight hours: 3,000 total, 10 in this make and model

## Weather

- Conditions: Visual (VMC), Day
- Wind: 70° at 5 knots
- Visibility: 30 statute miles
- Lowest ceiling: none
- Temperature: 86 °F, dew point 37 °F
- Altimeter: 29.00 inHg
- Observed at: RAL, 26 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 19930921035319A](https://openairdocs.org/incident/19930921035319A), Sep 21, 1993: Amtrwh DERJAGER, Hesperia, CA, Substantial damage. Lost power on initial takeoff climb. Lost control. Impacted off end of runway. Failed to lean mixture for altitude.

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.

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