# NTSB LAX98LA193: Saab-Scania 91B, N6370L, Redding, CA, June 8, 1998

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 8, 1998, 10:55 local (17:55 UTC)
- Place: Redding, CA
- Coordinates: 41.760784, -123.32991 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=41.7608&lon=-123.3299&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report February 15, 2001
- Report: Approved by Office Director
- NTSB case key (mKey): 30116
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX98LA193
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/30116/pdf
- Page: https://openairdocs.org/ntsb/LAX98LA193

## Probable cause

The failure of the pilot to maintain control of the aircraft during an aborted takeoff, which resulted in a ground loop.  A factor is the pilot's improper use of carburetor heat during takeoff.

## Sequence of events

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

- Loss of engine power(partial) - nonmechanical, takeoff - roll/run
  - carburetor heat - improper use of, pilot in command (contributing factor)
- Loss of control - on ground/water, takeoff - aborted
  - ground loop/swerve - inadvertent, pilot in command (contributing factor)
  - directional control - not maintained, pilot in command (cause)
- Gear collapsed, takeoff - aborted
  - landing gear - overload

## Analysis

The pilot reported that on the takeoff roll the engine didn't seem to be producing full power.  He aborted the takeoff and ground looped the aircraft.  The right main landing gear collapsed and the aircraft came to rest upright off the edge of the runway.  The pilot reported that he later realized that he had the carburetor heat on at the time of takeoff.

## Factual narrative

On June 8, 1998, at 1055 hours Pacific daylight time, a Saab 91B, N6370L, went off the end of the runway during an aborted takeoff at the Benton Field Airport, Redding, California.  The aircraft sustained substantial damage, and the commercial pilot and passenger, the sole occupants, were not injured.  Visual meteorological conditions prevailed for the local personal flight and no flight plan was filed.

The pilot reported that on the takeoff roll, he didn't feel as if the engine was producing full power.  He applied the brakes in an attempt to abort the takeoff and subsequently ground looped the aircraft.  The right main landing gear collapsed and the aircraft came to rest upright off the edge of the runway.

The pilot reported to the Safety Board that he later realized that he had the carburetor heat on at the time of takeoff.

## Aircraft

- Registration: [N6370L](https://openairdocs.org/aircraft/N6370L), registered now, S/N 91266, built 1953 (OpenAirDocs)
- Reported make and model: Saab-Scania AB (Saab) 91B
- Registry model: [Saab 91B](https://openairdocs.org/model/saab-91b) (registry code 7840321) (OpenAirDocs)
- Registry engine: [Lycoming 0-435](https://openairdocs.org/engine/lycoming-0-435) (registry code 41516, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 91266
- Airframe hours: 4422
- Engines: Lycoming O-435-A 190 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Lars Ljungquist
- Airworthiness certificate: Special, Experimental (Special)
- Departed: 085
- Destination: HIO, HILLSBORO, OR
- Airport: 085, Benton Field, runway 33, 2,420 × 80 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 56; commercial; airplane ratings: multi-engine land, single-engine land; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 1,806 total, 27 in this make and model, 1,806 as pilot in command

## Weather

- Conditions: Visual (VMC), Day
- Lowest ceiling: none
- Temperature: 66 °F
- Altimeter: 29.00 inHg

## 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 19980608025749A](https://openairdocs.org/incident/19980608025749A), Jun 8, 1998: Saab 91B, Redding, CA, Substantial damage. On June 8, 1998M at 1055 hours pacific daylight time, a Saab 91B, N6370L, went off the end of the runway during an aborted takeoff at the Benton Field Airport,…

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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