# NTSB LAX88DUG05: Costa TEENY-TWO, N5428R, Corona, CA, July 16, 1988

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Final report
- Date: July 16, 1988, 11:20 local (18:20 UTC)
- Place: Corona, CA
- Location: 33.8753° N, 117.5664° W: Placed by OpenAirDocs: center of Corona, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=33.8753&lon=-117.5664&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report November 28, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 25719
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX88DUG05
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/25719/pdf
- Page: https://openairdocs.org/ntsb/LAX88DUG05

## Sequence of events

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

- In flight collision with terrain/water, takeoff
  - planning/decision - improper, pilot in command (cause)
  - lack of total experience in type of aircraft, pilot in command (contributing factor)
  - stall/mush - inadvertent, pilot in command (cause)
  - terrain condition - rough/uneven (contributing factor)
  - terrain condition - soft (contributing factor)
  - terrain condition - wet (contributing factor)

## Analysis

THE HOMEBUILT TEENY-TWO ACFT WAS BUILT WITH A 40 HP, BRITISH RELIANT, HAWK AE ENG, RATHER THAN A VOLKSWAGON ENG WHICH BUILDERS NORMALLY USED. IT HAD BEEN FLOWN ONLY ONE TIME BEFORE THE ACDNT FLT. THE 1ST FLT WAS MADE IN COOLER TEMP CONDS WITHOUT INCIDENT; THE 2ND FLT WAS MADE ON AN 81 DEG DAY. THE PLT RPRTD THAT DRG TAKEOFF ON THE 2ND FLT, ALL SEEMED REASONABLY NORMAL UNTIL AFTER THE ACFT LIFTED OFF AT ABT MIDFIELD. AFTER IT HAD BECOME AIRBORNE & TRAVELED ABOUT 3/4 OF THE WAY DOWN THE 3200' RWY, THE PLT FELT THE ACFT 'STAGGER A LITTLE.'  HE CHECKED FOR FULL THROTTLE & LOWERED THE NOSE TO PICK UP AIRSPEED. HOWEVER, AS THE ACFT CONTINUED OVER A SWAMP AT THE END OF THE RWY, IT STARTED TO SETTLE & WOULD NOT SUSTAIN FLT. SUBSEQUENTLY, IT TOUCHED DOWN & CRASHED ON THE SWAMPY TERRAIN. NO PREIMPACT MECHANICAL FAILURE OR MALFUNCTION WAS RPRTD.

## Aircraft

- Registration: [N5428R](https://openairdocs.org/deregistered/N5428R-2013-07-15), registration cancelled 2013-07-15, S/N 15-2091 (OpenAirDocs)
- Reported make and model: COSTA TEENY-TWO
- Registry model: [Costa Walter F TEENY TWO](https://openairdocs.org/model/costa-walter-f-teeny-two) (registry code 056342G) (OpenAirDocs)
- Registry engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: 15-2091
- Airframe hours: 1
- Engines: RELIANT HAWK AE 40 horsepower reciprocating
- Damage: Substantial damage
- Flight: Part 91
- Registered owner: Costa, Walter F
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Annual, June 29, 1988, 2 hours before
- Airport: L66, Corona, runway 25, 3,200 × 60 ft, grass/turf

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 51; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: center; flight hours: 207 total, 1 in this make and model, 150 as pilot in command, 3 in the last 90 days, 1 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 260° at 5 knots
- Visibility: 2 statute miles
- Lowest ceiling: none
- Temperature: 81 °F, dew point 63 °F
- Altimeter: 29.00 inHg
- Observed at: ONT, 5 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 19880716027959A](https://openairdocs.org/incident/19880716027959A), Jul 16, 1988: Amtrpk TEENIE2, Corona, CA, Substantial damage. Unable to sustain flight after brief climbout. Nosed over on settling into a swamp. Underpowered engine installed.

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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