Date:	Sunday 8 June 2025
Time:	12:20
Type:	de Havilland Canada DHC-6 Twin Otter 100
Owner/operator:	Randigo LLC, opf Skydive Tennessee
Registration:	N166DH
MSN:	66
Year of manufacture:	1967
Fatalities:	Fatalities: 0 / Occupants: 21
Other fatalities:	0
Aircraft damage:	Substantial
Category:	Accident
Location:	near Tullahoma Regional Airport/William Northern Field (THA/KTHA), TN -   United States of America
Phase:	Initial climb
Nature:	Parachuting
Departure airport:	Tullahoma-Northern Airport, TN (THA/KTHA)
Destination airport:	Tullahoma-Northern Airport, TN (THA/KTHA)
Investigating agency:	NTSB
Confidence Rating:	Information verified through data from accident investigation authorities

Narrative:
On June 8, 2025, about 1220 central daylight time, a DeHavilland DHC-6 Twin Otter, N166DH, was involved in an accident near Tullahoma, Tennessee. The commercial pilot and five passengers were seriously injured, and 15 passengers were not injured. The flight was being conducted as a 14 Code of Federal Regulations Part 91 skydiving flight.

The pilot was attempting to take off from runway 24 at the Tullahoma Regional Airport (THA), Tullahoma, TN. The accident flight was his fourth flight in the airplane that day. The pilot stated the takeoff was normal and he raised the flaps once the airplane was clear of obstacles. When the airplane was about 500 ft above the ground, the pilot noticed asymmetrical thrust on the engines while syncing the propellers. He said, “In the following seconds, I continued trying to sync the props and was getting unusual feedback in the controls. I didn’t notice any loss of power in the gauges, but something felt a miss.” The pilot lowered the nose of the airplane and saw the altitude level off, and airspeed decrease.

The pilot determined that the left engine had lost power. He initiated “engine out procedures” and turned left, back to the airport to try and land on runway 36. The pilot could not remember if he secured the left engine; however, he did remember adding flaps as per the engine-out procedures. The pilot said he tried to maintain airspeed above the single engine minimum control speed (Vmc), but the airplane continued to descend. The pilot was unable to make it back to the airport and chose to land in a field. There were two trees in the field that he was unable to avoid, and the airplane impacted the trees. The airplane came to rest upright, but the left wing, left engine and the tail section separated from the airframe, resulting in substantial damage. The right wing and engine remained secured to the airframe. There was no postimpact fire.

The airplane wreckage was recovered and taken to a secure facility for further examination.

Weather about the accident time (c 1730Z):
METAR KTHA 081655Z AUTO 26010G17KT 10SM SCT034 BKN040 BKN045 27/19 A2986 RMK A01
METAR KTHA 081715Z AUTO 25014G22KT 10SM SCT037 BKN047 BKN055 27/18 A2986 RMK A01
METAR KTHA 081735Z AUTO 27014KT 10SM FEW038 FEW044 SCT055 27/18 A2986 RMK A01

https://edition.cnn.com/2025/06/08/us/coffee-county-tennessee-plane-crash
https://www.tullahomanews.com/news/local/officials-hold-press-conference-about-plane-crash/article_22277362-80f2-470c-b5cb-cc8a6e5ca9c2.html

NTSB
https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=166DH
https://www.flightaware.com/live/flight/N166DH/history/20250608/1602Z

https://images.squarespace-cdn.com/content/v1/629b9eefcc187113c6191527/1673edc8-1407-4bf8-9439-5054843deb61/66_N166DH_FRANK_JAEGER_CEDARTOWN_14-AUG-2020_1024.jpg?format=750w (photo)

Other occurrences involving this aircraft


11 October 2019

N166DH

Skydive Georgia

0

Cedartown-Polk County Airport, GA

sub

Photo: Tennessee Highway Patrol

Date/time	Contributor	Updates
08-Jun-2025 22:00	Captain Adam	Added
08-Jun-2025 22:06	Captain Adam	Updated [Source, Narrative, ]
08-Jun-2025 22:44	Justanormalperson	Updated [Damage, Narrative, ]
08-Jun-2025 23:17	Captain Adam	Updated [Damage, Narrative, ]
09-Jun-2025 05:20	Anon.	Updated [Phase, ]
09-Jun-2025 05:28	ASN	Updated [Operator, Source, Embed code, Narrative, ]
09-Jun-2025 06:07	vasilf	Updated [Embed code, ]
09-Jun-2025 06:17	ASN	Updated [Photo, ]
09-Jun-2025 06:18	Anon.	Updated [Embed code, ]
09-Jun-2025 06:57	vasilf	Updated [Embed code, ]
09-Jun-2025 12:30	Anon.	Updated [Time, Embed code, Narrative, ]
09-Jun-2025 13:39	vasilf	Updated [Embed code, ]
09-Jun-2025 15:44	vasilf	Updated [Embed code, ]
09-Jun-2025 16:38	Anon.	Updated [Category, ]
09-Jun-2025 16:44	vasilf	Updated [Embed code, ]
10-Jun-2025 06:32	Anon.	Updated [Embed code, ]
10-Jun-2025 08:56	vasilf	Updated [Embed code, ]
10-Jun-2025 18:47	ASN	Updated [Embed code, Damage, ]
02-Jul-2025 20:13	Captain Adam	Updated [Time, Total occupants, Phase, Source, Embed code, Damage, Narrative, Accident report, ]