# NTSB FTW85LA292: Champion 7KCAB, N1642G, Chattanooga, OK, July 20, 1985

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 20, 1985, 14:45 local (19:45 UTC)
- Place: Chattanooga, OK
- Coordinates: 34.419921, -98.650581 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=34.4199&lon=-98.6506&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 21804
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW85LA292
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/21804/pdf
- Page: https://openairdocs.org/ntsb/FTW85LA292

## 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
  - compensation for wind conditions - inadequate, pilot in command (cause)
  - directional control - not maintained, pilot in command (cause)
  - weather condition - crosswind (contributing factor)
- Nose down, landing - roll
  - terrain condition - soft (cause)

## Analysis

THE PLT LOST DIRECTIONAL CONTROL WHILE LANDING IN A CROSSWIND AND THE ACFT GROUND LOOPED AFTER THE LEFT MAIN LANDING GEAR CONTACTED SOFT TERRAIN ALONGSIDE OF THE RUNWAY. THE NEAREST OFFICIAL AVIATION WEATHER REPORTING STATION WAS AT LAWTON, OK, LOCATED 16 MILES NORTHEAST OF THE ACCIDENT SITE.THEIR WIND AT THE TIME OF THE ACCIDENT WAS FROM 150 DEGS AT 7 KTS. THE PLT LANDED ON RWY 17.

## Aircraft

- Registration: [N1642G](https://openairdocs.org/aircraft/N1642G), registered now, S/N 169, built 1969 (OpenAirDocs)
- Reported make and model: CHAMPION 7KCAB
- Registry model: [Champion 7KCAB](https://openairdocs.org/model/champion-7kcab) (registry code 21101P3) (OpenAirDocs)
- Registry engine: [Lycoming IO-320 series](https://openairdocs.org/engine/lycoming-io-320-series) (registry code 41509, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 169
- Airframe hours: 775
- Engines: LYCOMING IO-320 150 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Lawton Flying Club
- Registered owner: Harry E. Susan
- Airworthiness certificate: Standard, Normal
- Departed: 92F, CHATTANOOGA, OK
- Airport: 92F, Chattanooga Sky Harbor, runway 17, 3,400 × 60 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 44; commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: front; flight hours: 378 total, 18 in this make and model, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 270° at 10 knots, gusting 10
- Visibility: 12 statute miles
- Lowest ceiling: none
- Temperature: 95 °F
- Altimeter: 30.00 inHg
- Observed at: LAW

## 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 19850720037579A](https://openairdocs.org/incident/19850720037579A), Jul 20, 1985: Bbavia 7KCAB, Chattanooga, OK, Substantial damage. While on rollout following glider tow flight aircraft ground looped.

## Other investigations on N1642G (1)

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.

- [NTSB LAX81DUJ38](https://openairdocs.org/ntsb/LAX81DUJ38), Feb 1, 1981: Bellanca 7KCAB (N1642G), Chandler, AZ, substantial damage

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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