# NTSB MKC88LA140: Mooney M20C, N6722U, Olathe, KS, July 28, 1988

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 28, 1988, 09:00 local (14:00 UTC)
- Place: Olathe, KS
- Coordinates: 38.879531, -94.81076 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=38.8795&lon=-94.8108&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report September 11, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 34615
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC88LA140
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/34615/pdf
- Page: https://openairdocs.org/ntsb/MKC88LA140

## Sequence of events

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

- Loss of engine power, takeoff - initial climb
  - powerplant - undetermined (cause)
  - emergency procedure - improper, pilot in command (cause)
- Forced landing, descent - emergency
- Loss of control - in flight, descent - emergency
  - aircraft control - not maintained, pilot in command (cause)
  - stall/mush - encountered, pilot in command (contributing factor)
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

SHORTLY AFTER TAKEOFF, THE PILOT SAID THE ENGINE FAILED. HE SAID HE PUMPED THE THROTTLE AND THE ENGINE RESTARTED ABOUT THE SAME TIME THE ACFT RETURNED TO THE RUNWAY. THE ENGINE RESTART PROPELLED THE AFT BACK INTO THE AIR. THE PLT FELT HE HAD SUFFICIENT POWER TO CONTINUE. UPON REACHING ABOUT 100 FEET AGL, HE BEGAN A 180 DEGREE DOWNWIND TURN. ABOUT HALF WAY THROUGH THE TURN THE ENGINE FAILED AGAIN. THE PLT SAID HE TIGHTENED THE TURN, THE STALL HORN SOUNDED, AND THE AIRCRAFT STALLED AND COLLIDED WITH THE TERRAIN. POST-ACCIDENT INVESTIGATION WAS PERFORMED ON THE ENGINE AND FUEL SYSTEM AND THE CAUSE OF THE ENGINE FAILURE WAS UNDETERMINED.

## Aircraft

- Registration: [N6722U](https://openairdocs.org/deregistered/N6722U-1989-03-14), registration cancelled 1989-03-14, S/N 2454 (OpenAirDocs)
- Reported make and model: MOONEY M20C
- Registry model: [Mooney M20C](https://openairdocs.org/model/mooney-m20c) (registry code 5870208) (OpenAirDocs)
- Category: Airplane
- Serial number: 2454
- Airframe hours: 3159
- Engines: LYCOMING O-360-A1D 180 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Gerald D. Hammon
- Registered owner: Hammon, Gerald D
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, October 10, 1987, 40 hours before
- Departed: IXD, OLATHE, KS
- Airport: IXD, Olathe, runway 17, 7,339 × 190 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 41; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; seat: left; flight hours: 450 total, 30 in this make and model, 415 as pilot in command, 27 in the last 90 days, 3 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 170° at 5 knots
- Visibility: 5 statute miles
- Lowest ceiling: 25,000 ft broken
- Temperature: 75 °F, dew point 70 °F
- Altimeter: 30.00 inHg
- Observed at: IXD, 1 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 19880728028259A](https://openairdocs.org/incident/19880728028259A), Jul 28, 1988: Mooney M20C, Olathe, KS, Substantial damage. Engine quit on liftoff,bounced off runway and engine started. Tried to go around but stalled and crashed on downwind

## Other investigations on N6722U (1)

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.

- [NTSB DEN66F0118](https://openairdocs.org/ntsb/DEN66F0118), Oct 1, 1965: Mooney M20C (N6722U), Boulder, CO, substantial damage

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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