# NTSB MKC84LA198: Mooney M20K, N231FV, Blue Springs, MO, July 3, 1984

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 3, 1984, 12:45 local (17:45 UTC)
- Place: Blue Springs, MO
- Coordinates: 39.009037, -94.279579 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=39.0090&lon=-94.2796&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 4 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 33729
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC84LA198
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/33729/pdf
- Page: https://openairdocs.org/ntsb/MKC84LA198

## Sequence of events

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

- Loss of engine power(total) - mech failure/malf, cruise
  - engine assembly,piston - disintegrated (cause)
  - engine assembly,cylinder - overtemperature (cause)
  - engine assembly,cylinder - pressure excessive (cause)
  - mixture - improper use of, pilot in command (cause)
  - performance data - not understood, pilot in command (cause)
  - lubricating system,oil pressure pump - disabled
- Forced landing, descent - emergency
- In flight collision with terrain/water, landing - flare/touchdown
  - terrain condition - none suitable (contributing factor)

## Analysis

TEN MINUTES AFTER TAKEOFF ACFT LEVELED AT 2700 FEET AGL AT WHICH TIME THE PLT LEANED THE MIXTURE AND SET THE THROTTLE. SHORTLY AFTER, MANIFOLD PRESSURE ROSE ABOVE RED LINE AND THE ENGINE QUIT. AN ENGINE TEARDOWN REVEALED DETONATION IN THE #1 CYLINDER. THE #2 CYLINDER SHOWED EXTENSIVE THERMAL DAMAGE. ALSO, THE OIL PUMP WOODRUFF KEY SHEARED OFF.

## Aircraft

- Registration: [N231FV](https://openairdocs.org/deregistered/N231FV-1988-12-05), registration cancelled 1988-12-05, S/N 250227 (OpenAirDocs)
- Reported make and model: Mooney M20K
- Registry model: [Mooney M20K](https://openairdocs.org/model/mooney-m20k) (registry code 5870220) (OpenAirDocs)
- Category: Airplane
- Serial number: 25-0227
- Airframe hours: 899
- Engines: CONTINENTAL TSIO-360-GB 210 horsepower reciprocating
- Damage: Substantial damage
- Fire: Unknown
- Flight: Personal, Part 91
- Registered owner: Peter A. Vandemark
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, April 25, 1984, 2 hours before
- Departed: MKC, KANSAS CITY, MO
- Destination: A1Z, OSAGE BEACH, MO

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 44; private; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 3, valid medical--no waivers/lim.; seat: left; flight hours: 1,211 total, 934 in this make and model, 1,091 as pilot in command, 32 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 70° at 5 knots
- Visibility: 7 statute miles
- Lowest ceiling: none
- Temperature: 88 °F
- Altimeter: 29.00 inHg
- Observed at: MKC, 18 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 19840703029609A](https://openairdocs.org/incident/19840703029609A), Jul 3, 1984: Mooney M20K, Blue Springs, MO, Substantial damage. Forced landed wheel up after engine #1 pilston disentregated due to detonation. Debris caused further damaged.

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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