# NTSB CHI93LA325: Cessna 152-II, N47716, Keokuk, IA, August 17, 1993

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: August 17, 1993, 16:45 local (21:45 UTC)
- Place: Keokuk, IA
- Coordinates: 40.400508, -91.400764 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=40.4005&lon=-91.4008&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 August 17, 1994
- Report: Approved by Office Director
- NTSB case key (mKey): 9283
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI93LA325
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/9283/pdf
- Page: https://openairdocs.org/ntsb/CHI93LA325

## Probable cause

the loss of engine power due to an exhaust valve failure.  A factor related to the accident is the power line.

## Sequence of events

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

- Loss of engine power(partial) - mech failure/malf, takeoff - initial climb
  - engine assembly,valve,exhaust - failure,total (cause)
- Forced landing, descent - emergency
- Loss of control - in flight, descent - emergency
  - object - wire,transmission (contributing factor)
  - airspeed - not maintained, pilot in command
  - stall - inadvertent, pilot in command
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

The student pilot was in the traffic pattern practicing touch- and-go landings.  During the climb after a touch-and-go the engine began to run rough and lose power.  The student attempted to make a forced landing in a field which was ahead of him.  He pulled the airplane up to avoid two power lines which were in his path, and the airplane stalled and crashed. Postaccident inspection discovered a fractured exhaust valve in the number one cylinder.

## Factual narrative

On August 17, 1993, about 1645 central daylight time, a Cessna 152, N47716, sustained substantial damage during a forced landing near the Keokuk Municipal Airport, Keokuk, Iowa, following a loss of engine power.  The student pilot was not injured.  The local student solo training flight was operating without a flight plan in visual meteorological conditions.

The student pilot reported the engine began to lose power and run rough during the initial climb following a touch-and-go landing.  During the forced landing the student said he pulled the airplane up to avoid two power lines, and the airplane stalled and crashed.

The engine was examined by an FAA Airworthiness Inspector. He found the exhaust valve in the #1 cylinder had broken, and there were two holes in the top of the cylinder.

## Aircraft

- Registration: [N47716](https://openairdocs.org/deregistered/N47716-1994-10-05), registration cancelled 1994-10-05, S/N 15283245 (OpenAirDocs)
- Reported make and model: CESSNA 152-II
- Registry model: [Cessna 152](https://openairdocs.org/model/cessna-152) (registry code 2071835) (OpenAirDocs)
- Category: Airplane
- Serial number: 15283245
- Airframe hours: 4100
- Engines: LYCOMING O-235-L2C 110 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Registered owner: Lindner Aviation
- Airworthiness certificate: Standard, Utility
- Last inspection: 100 hour, July 13, 1993, 36 hours before

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 40; student; medical: class 3, valid medical--no waivers/lim.; seat: left; flight hours: 24 total, 24 in this make and model, 5 as pilot in command, 24 in the last 90 days, 8 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 110° at 4 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 91 °F, dew point 73 °F
- Altimeter: 29.00 inHg
- Observed at: BRL, 27 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 19930817029669A](https://openairdocs.org/incident/19930817029669A), Aug 17, 1993: Cessna 152, Keokuk, IA, Substantial damage. On touch and go climbout lost power. Tried for field. Pulled up avoid wires stalled. Crashed. Broke exhaust valve.

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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