# NTSB MKC88LA155: Cessna 188B, N4999R, Sumner, IA, August 11, 1988

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: August 11, 1988, 09:30 local (14:30 UTC)
- Place: Sumner, IA
- Coordinates: 42.839504, -92.090438 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=42.8395&lon=-92.0904&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report September 11, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 34628
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC88LA155
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/34628/pdf
- Page: https://openairdocs.org/ntsb/MKC88LA155

## Sequence of events

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

- In flight collision with terrain/water, takeoff
  - preflight planning/preparation - improper, pilot in command (cause)
  - distance - misjudged, pilot in command (cause)
  - lift-off - premature, pilot in command (cause)
  - terrain condition - roadway/highway (contributing factor)
  - weather condition - high density altitude (contributing factor)
  - load jettison - not performed, pilot in command (contributing factor)

## Analysis

DURING TAKEOFF FOR AN AERIAL APPLICATION OPERATION, THE PILOT SAID HE WAS NOT ABLE TO CLIMB HIGH ENOUGH TO CLEAR A 4 FOOT HIGH ROAD AT THE END OF THE RUNWAY. HE COLLIDED WITH THE ROAD, SHEARING OFF THE MAIN LDG GEAR AND SUBSTANTIALLY DAMAGING THE ACFT. HE SAID HE THOUGHT THE FIELD WAS ABOUT 400 FEET LONGER THAN IT WAS, 2300 INSTEAD OF 1900. HE HAD ABOUT A 170 GALLON LOAD OF INSECTICIDE ON BOARD, AND THE DENSITY ALTITUDE WAS NEAR 2500 MSL.

## Aircraft

- Registration: [N4999R](https://openairdocs.org/deregistered/N4999R-2006-02-03), registration cancelled 2006-02-03, S/N 18802486T, built 1975 (OpenAirDocs)
- Reported make and model: CESSNA 188B
- Registry model: [Cessna A188B](https://openairdocs.org/model/cessna-a188b) (registry code 2073005) (OpenAirDocs)
- Registry engine: [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series) (registry code 17032, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 18802486T
- Airframe hours: 2240
- Engines: CONTINENTAL IO-520-D 300 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Operator: Cedar Valley Farm Services
- Registered owner: Jacobson, Lane H
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, November 4, 1987, 100 hours before
- Departed: SUMNER, IA
- Airport: NONE, Sumner, runway 18, 1,900 ×  ft, grass/turf

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 39; commercial, flight instructor; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: left; flight hours: 5,236 total, 1,348 in this make and model, 5,000 as pilot in command, 100 in the last 90 days, 32 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 210° at 9 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 82 °F, dew point 72 °F
- Altimeter: 30.00 inHg
- Observed at: ALO, 25 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 19880811032409A](https://openairdocs.org/incident/19880811032409A), Aug 11, 1988: Cessna A188B, Sumner, IA, Substantial damage. Misjudged runway length for load. Lifted off at end of runway and sheared off gear on a road 4 feet higher than rwy

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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