# NTSB MKC85LA188: Cessna 172RG, N4772R, Lee'S Summit, MO, August 17, 1985

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: August 16, 1985, 21:00 local (Aug 17, 1985, 02:00 UTC)
- Place: Lee'S Summit, MO
- Coordinates: 38.910713, -94.380165 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=38.9107&lon=-94.3802&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 34010
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC85LA188
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/34010/pdf
- Page: https://openairdocs.org/ntsb/MKC85LA188

## 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, maneuvering
  - carburetor heat control - failure,total (cause)
  - weather condition - carburetor icing conditions (contributing factor)
  - carburetor heat - attempted, pilot in command
  - carburetor heat - not possible
  - fuel system,carburetor - ice (cause)
- Forced landing, descent - emergency
- Nose over, landing
  - light condition - dark night (contributing factor)
  - terrain condition - crop (contributing factor)
  - terrain condition - soft (contributing factor)
  - terrain condition - wet (contributing factor)
- Nose over, landing - roll

## Analysis

THE PLT REPORTED THAT THE ENG START & RUN-UP WERE NORMAL BEFORE HE TOOK OFF ON A NIGHT CURRENCY & PROFICIENCY FLT. AFTER 2 NORMAL TAKEOFFS & FULL STOPS, HE MADE A 3RD TAKEOFF.HE CLIMBED TO 1000 FT AGL ON A X-WIND LEG, REDUCED POWER TO 20' MANIFOLD PRESSURE & MOVED CARB HEAT CONTROL 'ON' & INITIATED A TURN. WHILE TURNING, THE ENG SUDDENLY STOPPED. UNABLE TO REACH THE RWY, THE PLT LANDED IN A SOFT, MUSHY MILO FIELD AT NIGHT. DURING THE LANDING, THE ACFT NOSED OVER. AN EXAM REVEALED THE CARB HEAT SHROUD HAD BROKEN OFF ITS MOUNTING ATTACHMENT. ALSO, THE FLEXIBLE HOSE FROM THE CARB HEAT AIR SHROUD TO THE CARB WAS ALMOST COLLAPSED. ADDITIONALLY, THE TEMP & DEW POINT WERE 78 & 73 DEGS, RESPECTFULLY. ACCORDING TO ICING PROBABILITY CHARTS, CONDITIONS WERE CONDUCIVE TO CARB ICE.

## Aircraft

- Registration: [N4772R](https://openairdocs.org/aircraft/N4772R), registered now, S/N 172RG0027, built 1979 (OpenAirDocs)
- Reported make and model: CESSNA 172RG
- Registry model: [Cessna 172RG](https://openairdocs.org/model/cessna-172rg) (registry code 2072438) (OpenAirDocs)
- Registry engine: [Lycoming O&VO-360 series](https://openairdocs.org/engine/lycoming-o-vo-360-series) (registry code 41514, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 172RG0027
- Airframe hours: 1935
- Engines: LYCOMING IO-360-F1A6 180 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Schwab S. Major
- Registered owner: Ingry Ltd.
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, August 7, 1985, 72 hours before
- Airport: K84, Mccomas-Lee'S Summit Muni, runway 18, 3,000 × 60 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 61; flight instructor, commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 663 total, 84 in this make and model, 497 as pilot in command, 31 in the last 90 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Night/dark
- Wind: 80° at 8 knots
- Visibility: 5 statute miles
- Lowest ceiling: none
- Temperature: 79 °F, dew point 73 °F
- Altimeter: 29.00 inHg
- Observed at: MKC, 14 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 19850816039279A](https://openairdocs.org/incident/19850816039279A), Aug 16, 1985: Cessna 172RG, Lees Summit, MO, Substantial damage. Nosed over after engine quit due to carburetor ice. Heat shroud assembly was broken and flex hose collapsed.

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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