# NTSB CHI86LA032: Rockwell 112, N10285, Pekin, IL, November 21, 1985

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: November 21, 1985, 16:30 local (22:30 UTC)
- Place: Pekin, IL
- Coordinates: 40.559463, -89.620483 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=40.5595&lon=-89.6205&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 13386
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI86LA032
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/13386/pdf
- Page: https://openairdocs.org/ntsb/CHI86LA032

## Sequence of events

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

- Airframe/component/system failure/malfunction, cruise - normal
  - lubricating system,oil line - disconnected (contributing factor)
  - maintenance,installation - improper, company maintenance personnel (cause)
- Forced landing, descent - emergency
  - proper glidepath - misjudged, pilot in command (cause)
  - proper touchdown point - misjudged, pilot in command (cause)

## Analysis

FOLLOWING A TOP OVERHAUL OF THE ENGINE A TEST FLIGHT WAS PLANNED TO BREAK IN THE CYLINDERS AND RINGS. PRIOR TO THIS FLIGHT THE ENGINE WAS OPERATED FOR A SHORT PERIOD ON THE GROUND THEN SHUT DOWN AND CHECKED FOR OIL LEAKS WITH NEGATIVE RESULTS. THE TAKEOFF AND INITIAL CLIMB WERE UNEVENTFUL. SHORTLY AFTER LEVELOFF THE PROP SURGED MOMENTARILY AND ENGINE PERFORMANCE DETERIORATED RAPIDLY. THE PILOT SHUT THE ENGINE DOWN AND ENTERED THE VFR TRAFFIC PATTERN ON DOWNWIND. HE LOWERED THE GEAR AND LANDED SHORT OF THE RUNWAY. AN EXAMINATION OF THE ENGINE FOLLOWING THE ACCIDENT REVEALED THAT A 'B' NUT ON THE PORP GOVERNOR LINE HAD BACKED OFF, ALLOWING MOST OF THE OIL TO DRAIN OUT, ACCORDING TO THE PILOT.

## Aircraft

- Registration: N10285 (not matched to a registry record)
- Reported make and model: ROCKWELL 112
- Category: Airplane
- Serial number: 28
- Airframe hours: 1283
- Engines: LYCOMING IO-360-C1D6 200 horsepower reciprocating
- Damage: Substantial damage
- Flight: Part 91
- Registered owner: Larry A. Lemke
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, November 19, 1984, 129 hours before
- Airport: C15, Pekin Municipal Airport, runway 9, 3,800 × 75 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 28; flight instructor, commercial; airplane ratings: single-engine land; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 708 total, 1 in this make and model, 494 as pilot in command, 5 in the last 90 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Dusk
- Wind: 80° at 15 knots, gusting 7
- Visibility: 7 statute miles
- Lowest ceiling: 7,500 ft overcast
- Temperature: 30 °F, dew point 25 °F
- Altimeter: 30.00 inHg

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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