# NTSB CHI84LA087: Cessna 150L, N10502, Rock Falls, IL, January 18, 1984

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: January 18, 1984, 11:10 local (17:10 UTC)
- Place: Rock Falls, IL
- Coordinates: 41.770568, -89.690361 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=41.7706&lon=-89.6904&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 12528
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI84LA087
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/12528/pdf
- Page: https://openairdocs.org/ntsb/CHI84LA087

## Sequence of events

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

- Loss of engine power(total) - nonmechanical, approach - vfr pattern - final approach
  - supervision - inadequate, pilot in command(cfi) (contributing factor)
  - throttle/power control - improper use of, dual student (cause)
  - engine assembly - other (cause)
- Forced landing, descent - emergency
- On ground/water encounter with terrain/water, landing - roll
  - terrain condition - snowbank (contributing factor)
  - landing gear,nose gear - overload (contributing factor)
- Nose over, landing - roll

## Analysis

THE INSTRUCTOR PLT STATED THAT THE STUDENT PLT WAS FLYING THE AIRCRAFT. WHILE ON FINAL APPROACH HE ADVISED THE STUDENT PLT TO ADD ENGINE POWER. THE STUDENT DID SO VERY RAPIDLY CAUSING THE ENGINE TO STALL. BEFORE THE ENGINE COULD BE RESTARTED THE AIRCRAFT TOUCHED DOWN SHORT OF THE RUNWAY, COLLIDED WITH A SNOW BANK CAUSING THE NOSE GEAR TO COLLAPSE, AND NOSED OVER.

## Aircraft

- Registration: [N10502](https://openairdocs.org/deregistered/N10502-1984-06-02), registration cancelled 1984-06-02, S/N 15074892 (OpenAirDocs)
- Reported make and model: CESSNA 150L
- Registry model: [Cessna 150L](https://openairdocs.org/model/cessna-150l) (registry code 2071826) (OpenAirDocs)
- Category: Airplane
- Serial number: 15074892
- Airframe hours: 1450
- Engines: CONTINENTAL O-200-A 100 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Operator: K. A. Cook, doing business as Cook Aviation, Inc.
- Registered owner: Cook Aviation,Inc.
- Airworthiness certificate: Standard, Utility
- Last inspection: Annual, September 1, 1983, 55 hours before
- Departed: SQI, ROCK FALLS, IL
- Airport: SQI, Whiteside County, runway 36, 3,899 × 100 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 25; flight instructor, commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: right; flight hours: 2,557 total, 500 in this make and model, 2,383 as pilot in command, 120 in the last 90 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Dawn
- Wind: 310° at 12 knots
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 7 °F, dew point 18 °F
- Altimeter: 30.00 inHg
- Observed at: RFD

## 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 19840118062949A](https://openairdocs.org/incident/19840118062949A), Jan 18, 1984: Cessna 150L, Rock Falls, IL, Substantial damage. Low on final, engine failed to respond due to overboost. Struck a snowbank short of the runway and overturned.

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.