# NTSB MKC87LA143: Schweizer G-164A, N8911H, Lilbourn, MO, July 21, 1987

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 20, 1987, 19:30 local (Jul 21, 1987, 00:30 UTC)
- Place: Lilbourn, MO
- Coordinates: 36.590301, -89.610504 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=36.5903&lon=-89.6105&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report October 7, 1988
- Report: Approved by Office Director
- NTSB case key (mKey): 34416
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC87LA143
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/34416/pdf
- Page: https://openairdocs.org/ntsb/MKC87LA143

## Sequence of events

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

- Loss of engine power, cruise
  - engine assembly,cylinder - cracked (cause)
- Forced landing, descent - emergency
- Nose over, landing
  - terrain condition - soft (contributing factor)
  - unsuitable terrain or takeoff/landing/taxi area - selected, pilot in command (contributing factor)
- Fire, other

## Analysis

WHILE RETURNING FROM AN AERIAL APPLICATION FLIGHT, THE AIRCRAFT'S ENGINE LOST POWER AND QUIT. THE PILOT MADE A FORCED LANDING IN A SOFT FIELD AND NOSED OVER. POST ACCIDENT INSPECTION REVEALED A CYLINDER WAS CRACKED. SEVERAL HOURS AFTER THE ACCIDENT, THE UNATTENDED AIRCRAFT CAUGHT FIRE AND WAS DESTROYED.

## Aircraft

- Registration: N8911H (not matched to a registry record)
- Reported make and model: SCHWEIZER G-164A
- Category: Airplane
- Serial number: 1611
- Engines: P&W R-1340-AN1 600 horsepower reciprocating
- Damage: Destroyed
- Fire: On-Ground
- Flight: Aerial application, Part 137
- Operator: Dick Twitty
- Registered owner: Dick Twitty
- Airworthiness certificate: Special, Restricted (Special)

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 38; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; seat: center; flight hours: 3,269 total, 1,890 in this make and model, 3,269 as pilot in command, 163 in the last 90 days, 77 in the last 30 days, 5 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Dusk
- Wind: 180° at 6 knots
- Visibility: 7 statute miles
- Lowest ceiling: none
- Temperature: 93 °F, dew point -0 °F
- Altimeter: 29.00 inHg

## 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 19870720040059A](https://openairdocs.org/incident/19870720040059A), Jul 20, 1987: Scwzer G164A, Lilbourn, MO, Destroyed. Engine quit. Landed in a plowed field. Aircraft turned over. Had a cracked cylinder. Delayed fire destroyed plane.

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.