# NTSB LAX83FU011: Eipper MX, Ramona, CA, July 20, 1983

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Final report
- Date: July 20, 1983, 09:21 local (16:21 UTC)
- Place: Ramona, CA
- Coordinates: 33.070846, -116.830123 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=33.0708&lon=-116.8301&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 23531
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX83FU011
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/23531/pdf
- Page: https://openairdocs.org/ntsb/LAX83FU011

## 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
  - terrain condition - high obstruction(s) (contributing factor)
  - flight controls - improper use of, pilot in command (cause)
  - inadequate training, pilot in command (contributing factor)
  - airspeed - not maintained, pilot in command (cause)
  - stall/mush - inadvertent, pilot in command (cause)
- In flight collision with terrain/water, takeoff

## Analysis

AFTER RECEIVING DUAL INSTRUCTION IN A 2 PLACE, TRAINING VEHICLE, THE PLT TOOK OFF ON A SOLO FLT FROM A 270 X 25 FT ULTRALIGHT STRIP. HE REPORTED THAT AFTER LIFT-OFF, THE VEHICLE STARTED DRIFTING TOWARD A TREE. HE INITIATED A TURN TO THE RIGHT (AWAY FROM THE TREE); BUT THE VEHICLE BEGAN LOSING LIFT & SUBSEQUENTLY CRASHED IN A NOSE HIGH, SLIGHTLY RIGHT WING LOW ATTITUDE. THE PLT REPORTED THAT THE ENG OPERATED NORMALLY & THAT HE DID NOT USE THE SPOILERONS. HOWEVER, WITNESSES OBSERVED THE VEHICLE IN AN ERRATIC YAW & REPORTED SEEING EXTENSION ON THE RIGHT SPOILERON & LEFT RUDDER DEFLECTION, THEN LATER SAW THE LEFT SPOILERON EXTEND. THE PLT'S INSTRUCTOR CALLED ON THE RADIO TO RETRACT THE SPOILERONS& INCREASE POWER, BUT THE PLT STATED HE DID NOT HEAR THE TRANSMISSION. THE PLT STATED THAT HIS DUAL TRAINING, DURING THEPRECEEDING 2 MONTHS, CONSISTED OF TAKEOFFS & LANDINGS ONLY, AND THAT HE WAS NOT TAUGHT TO USE SPOILERONS AND/OR STALL & SLIP MANEUVERS. THE 2 PLACE ULTRALIGHT, USED FOR DUAL TRAINING, WAS NOT EQUIPPED WITH SPOILERONS.

## Aircraft

- Registration: UNREG (not matched to a registry record)
- Reported make and model: EIPPER MX
- Category: Ultralight, amateur-built
- Engines: Cuyuna UNK/NR 35 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 103
- Registered owner: William Jenner-John Hoose
- Airport: San Diego Ultra-Light, runway 27, 270 × 25 ft, grass/turf

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; airplane ratings: single-engine land; medical: unknown; seat: center

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 75 °F

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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