# NTSB CHI90LA168: Beech V35B, N35TP, Lockport, IL, July 5, 1990

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 4, 1990, 19:00 local (Jul 5, 1990, 00:00 UTC)
- Place: Lockport, IL
- Coordinates: 41.580654, -88.040786 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=41.5807&lon=-88.0408&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report September 15, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 14701
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI90LA168
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/14701/pdf
- Page: https://openairdocs.org/ntsb/CHI90LA168

## Probable cause

THE PILOT'S FAILURE TO MAINTAIN AIRCRAFT DIRECTIONAL CONTROL AND KEEP THE AIRCRAFT ON THE RUNWAY DURING THE LANDING ROLL.

## Sequence of events

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

- Loss of control - on ground/water, landing - roll
  - directional control - not maintained, pilot in command (cause)
  - terrain condition - soft (contributing factor)
  - ground loop/swerve - encountered, pilot in command (contributing factor)
- On ground/water encounter with terrain/water, landing - roll
  - terrain condition - ditch

## Analysis

THE PILOT REPORTED THAT DURING THE LANDING ROLL THE AIRCRAFT BEGAN TO DRIFT TO THE LEFT AND HIS RIGHT RUDDER AND BRAKE INPUTS WEREN'T SUFFICIENT TO CORRECT FOR THE DRIFT. THE AIRCRAFT DEPARTED THE LEFT SIDE OF THE 48' WIDE RUNWAY AND ENCOUNTERED SOFT TERRAIN AND A DITCH.

## Aircraft

- Registration: [N35TP](https://openairdocs.org/aircraft/N35TP), registered now, S/N D-10018, built 1977 (OpenAirDocs)
- Reported make and model: BEECH V35B
- Registry model: [Beech V35B](https://openairdocs.org/model/beech-v35b) (registry code 1151548) (OpenAirDocs)
- Registry engine: [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series) (registry code 17032, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: D10017
- Airframe hours: 1867
- Engines: CONTINENTAL IO-520-BA 285 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Thread Systems, Inc.
- Registered owner: Thread Systems,, Inc
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, August 31, 1989, 120 hours before
- Airport: LOT, Lewis Lockport, runway 27, 3,000 × 48 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 55; private; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 1,225 total, 170 in this make and model, 1,165 as pilot in command, 50 in the last 90 days, 24 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 250° at 15 knots
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 97 °F, dew point 72 °F
- Altimeter: 29.00 inHg
- Observed at: MDW, 19 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 19900704023289A](https://openairdocs.org/incident/19900704023289A), Jul 4, 1990: Beech V35B, Romeoville, IL, Substantial damage. Swerved on landing, a wheel hit soft shoulder,veered aircraft into ditch. Found sun glasses wedged in rudder hole.

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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