# NTSB CHI98LA295: North American SNJ-6B, N7983C, Quincy, IL, August 2, 1998

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: August 2, 1998, 11:30 local (16:30 UTC)
- Place: Quincy, IL
- Coordinates: 39.929428, -91.380157 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=39.9294&lon=-91.3802&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor, 1 uninjured
- Status: Completed, report February 16, 2001
- Report: Approved by Office Director
- NTSB case key (mKey): 43595
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI98LA295
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/43595/pdf
- Page: https://openairdocs.org/ntsb/CHI98LA295

## Probable cause

the right main landing gear collapsed for undetermined reasons.

## Sequence of events

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

- Gear collapsed, landing
  - landing gear,main gear - collapsed (cause)
  - landing gear,main gear - undetermined (cause)
- On ground/water encounter with terrain/water, landing - roll

## Analysis

The pilot reported that the right wing dropped during touchdown.  He used the controls and power to keep the wing elevated.  He reported that the airplane veered to the left of the runway at which time he reduced power and the right wing contacted the ground.  Post accident inspection revealed the right main landing gear collapsed for undetermined reasons.

## Factual narrative

On August 2, 1998, at 1130 central daylight time (cdt) , a North American SNJ-6B, N7983C, registered to SNJ, Inc., was substantially damaged when the left main gear collapsed on landing at the Quincy Municipal Airport, Quincy, Illinois.  The airline transport rated pilot was not injured.  The passenger received minor injuries.  The 14 CFR Part 91 personal flight was operating in visual meteorological conditions without a flight plan.  The flight originated at Oshkosh, Wisconsin, at 0830 cdt.

The pilot reported, "At touchdown the right wing started down as though the right gear was not down.  I lifted the wing with the controls and applied power.  When the aircraft cleared the runway to the left I reduced power and the right wing fell and the aircraft slid to a stop."  The landing was made on runway 04 (7,097' x 150').

Inspection of the airplane revealed the right main landing gear collapsed for undetermined reasons.

## Aircraft

- Registration: N7983C (not matched to a registry record)
- Reported make and model: North American SNJ-6B
- Category: Airplane
- Serial number: 112247
- Engines: P&W R-1340 600 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Snj, Inc.
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, May 14, 1998, 12 hours before
- Departed: OSH, OSHKOSH, WI
- Destination: UIN
- Airport: UIN, Quincy Municipal, runway 4, 7,097 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 43; airline transport; airplane ratings: multi-engine land, single-engine sea, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: front

## Weather

- Conditions: Visual (VMC), Day
- Wind: 160° at 9 knots
- Visibility: 15 statute miles
- Lowest ceiling: 22,000 ft overcast
- Temperature: 79 °F, dew point 55 °F
- Altimeter: 30.00 inHg
- Observed at: UIN

## 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 19980802045889A](https://openairdocs.org/incident/19980802045889A), Aug 2, 1998: Namer SNJ6, Quincy, IL, Substantial damage. On August 2, 1998, at 1130 central daylight time (CDT) , a north American SNJ-6B, N7983C, registered to snj, inc., was substantially damaged when the left main…

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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