Accident Socata TBM700 N69BS, Tuesday 4 August 1998
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Date:Tuesday 4 August 1998
Type:Silhouette image of generic TBM7 model; specific model in this crash may look slightly different    
Socata TBM700
Owner/operator:Eagle Flight Center Inc
Registration: N69BS
MSN: 10
Year of manufacture:1991
Total airframe hrs:1695 hours
Engine model:P&W PT6A-64
Fatalities:Fatalities: 4 / Occupants: 4
Other fatalities:0
Aircraft damage: Destroyed
Location:Spearfish/Black Hills Airport (SPF/KSPF), SD -   United States of America
Phase: Approach
Departure airport:Dane County Regional Airport, WI (MSN/KMSN)
Destination airport:Spearfish/Black Hills Airport, SD (SPF/KSPF)
Investigating agency: NTSB
Confidence Rating: Accident investigation report completed and information captured
On August 4, 1998, about 1345 mountain daylight time, a Socata TBM-700, N69BS, registered to a private individual, crashed while turning from downwind to base leg at the Spearfish/Black Hills Airport (SPF) near Spearfish, South Dakota, while on a Title 14 CFR Part 91 personal flight. Marginal visual meteorological conditions were reported, and an IFR flight plan was filed. The airplane was destroyed. The private-rated pilot-in-command, a commercial-rated pilot/passenger, a private-rated pilot/passenger, and one passenger were fatally injured. The flight had originated at an unknown time, the same day, from Lawrence, Massachusetts, en route to Spearfish, and had made a refueling stop at Madison, Wisconsin. The flight departed Madison at 1146 CDT [1046 MST].

Witnesses observed the flight enter downwind for runway 30, after it had completed a published approach to runway 12, with a circle to land on runway 30. The witnesses, one of which was a commercial pilot said that there were jagged ceilings at the time about 400 to 500 feet above the ground. He and two other men with him saw the airplane below the clouds. As the airplane proceeded downwind, it momentarily entered a cloud. As the airplane came out of the cloud, it turned left in about a 30 degree turn. The angle of bank increased to about 70 to 80 degrees, the tail of the airplane came up, and the airplane impacted the ground nose first.

Several pilots at the airport heard someone from N69BS make a radio transmission on the UNICOM frequency. What was heard by several people was that N69BS had broken out at 2200 feet. They then heard, 'N69BS turning base,' immediately followed by 'lookout' and 'oh ....' All of the eye witnesses agreed that at no time did they see or hear any problems with the engine. They all said that the sounds coming from the engine never changed. The published approach in use at the time of the accident was the GPS (global positioning system) runway 12. The pilot made his initial approach to runway 12, broke off the approach to the right, entered a right downwind for a landing on runway 30. The published circling minimums for the approach were MDA (minimum descent altitude) 4,800 feet, HAT (height above terrain) 869 feet. Using an approach speed of 90 knots, the minimum visibility was 1 mile. Using an approach speed of 120 knots, the minimum visibility was 1 1/4 miles. The field elevation was 3,931 feet. The profile for the GPS runway 12 approach showed that after the IAF (Jesee way point), the course was 204 degrees, at 7,000 feet, to the Dezzi way point, from Dezzi the course was 114 degrees, descend to 5,600, to Sophi way point, after Sophi descend to 4,800 feet to the missed approach point at the Ruste way point. The distance from Dezzi to Ruste was 10 miles.

Probable Cause: The pilot's failure to maintain control of the airplane while turning to base leg. Contributing factors were low ceilings, clouds, and the pilot's failure to adhere to both the published approach procedures and the published minimum decent altitude.

Accident investigation:
Investigating agency: NTSB
Report number: MIA98FA219
Status: Investigation completed
Duration: 1 year and 7 months
Download report: Final report




Photos: NTSB

Revision history:

24-Oct-2008 10:30 ASN archive Added
30-Jul-2016 22:33 Dr.John Smith Updated [Time, Operator, Location, Departure airport, Destination airport, Source, Narrative]
13-Oct-2022 11:20 Captain Adam Updated [Time, Location, Departure airport, Destination airport, Source, Narrative, Category, Accident report, Photo]
13-Oct-2022 11:21 Captain Adam Updated [Photo]

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