C-FITAQP: 7) TERRAIN COLLISION

Vertical Av. Tech. 260L | N829SH

Spring Branch, Texas

  • DTSB analysis published
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Key facts

  • DateApril 29, 2024
  • Local time3:15 PM
  • LightDay
  • WeatherVMC
  • Phase of flightEnroute
  • People on board2
  • Fatalities2
  • Airport1T7
  • NTSB numberCEN24FA167
  • NTSB statusUnder investigation

Accident Location

City, State
Spring Branch, Texas
Latitude
29.828998
Longitude
-98.446451
Airport ID
1T7

Aircraft Info

N Number
N829SH
Make
Vertical Av. Tech.
Model
260L
Category / Class
Helicopter
Amateur Built
Yes

Pilot Info

Pilot in command
Herr, Richard
Gender
Male
Age
62
Certification
Airline Transport Pilot
IFR rating
Yes
Medical
3rd Class Medical
Flight school
No
Instructional flight
No

Analysis

Weather
VMC
Time of day
Day
Phase of flight
Enroute
Pilot error
Yes
Pilot incapacitation
No
People on board
2
PIC fatality
1
Passenger fatalities
1
Total fatalities
2
NTSB number
CEN24FA167
NTSB travel
Yes

Probable Cause

THE DTSB

The DTSB determines the Probable Cause of this accident to be Pilot Error, in that there were no mechanical difficulties discovered in the post accident review, and the density altitude at the time was approximately 3300 feet. It is likely that the pilot allowed an aerodynamic blade stall in flight with excessive collective pitch and insufficient rotor speed which then caused a loss of control, and impact.

NTSB

Probable Cause issued 6/10/2026 – 26 months after the accident: A total loss of engine power for undetermined reasons, which resulted in a forced landing and a subsequent impact with terrain.

Recommendation

THE DTSB

The DTSB recommends that all pilots of all aircraft become aware of gross weight, density altitude and other limitations in helicopter operations that could cause a sudden and unrecoverable loss of control in flight, and maintain sufficient safety margins at all times.

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