20231120020249A

Accident · Substantial damage

FAA accident report · Bell OH-58A · Imperial, CA · November 20, 2023

Date
November 20, 2023 · 20:05 local
Place
Imperial, CA
Airport
Imperial
Phase of flight
Takeoff: Climb Out
Operating rules
Agricultural (Part 137)
Operator
71TG
Damage
Substantial damage
Aircraft
N158TR
NTSB investigation
NTSBWPR24LA041
Reported as
Bell OH-58A
Reported engine
Rolls-Royce T63-A-720
People aboard
1
Fatal injuries
0
Other injuries
0

From the FAA’s Accident/Incident Data System (AIDS), through its Aviation Safety Information Portal, as reported. The NTSB investigates accidents separately, and its record of an accident is the fuller one. The aircraft is matched to the registry by N-number and event date, checked against the reported make and model; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

What happened

The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.

Shortly after take off about 200 yards the pilot experienced a sudden power surge followed immediately by abnormal engine noise and vibration.

Pilots stated the following,

Sensing that an emanate engine failure was going to occur, I immediately began a right turn back to flat terrain on

The company's property. About halfway back to the level terrain (aircraft was currently transitioning over the

Riverbed and heavy brush) the engine continued making abnormal noise with an obvious loss of power. As I

Approached the landing site I had to bleed off some of the available rotor RPM to clear the embankment.

As the aircraft reached the level terrain, I was at approximately 20 mph over the ground, and I made a slight pitch up to decrease forward movement. As the aircraft settled from approximately 5' AGL I applied forward cyclic to make contact with the ground with skids level and pulled the remaining collective in an attempt to cushion the touch down. There was not enough rotor RPM remaining to cushion, and I estimate that the aircraft fell through from approximately 4-5 feet.

Touch down was moderately violent as the main rotor drooped to make contact with the upper wire strike protection fixture, and subsequently separated from the aircraft.

As the FAA filed it

SHORTLY AFTER TAKE OFF ABOUT 200 YARDS THE PILOT EXPERIENCED A SUDDEN POWER SURGE FOLLOWED IMMEDIATELY BY ABNORMAL ENGINE NOISE AND VIBRATION.

PILOTS STATED THE FOLLOWING,

SENSING THAT AN EMANATE ENGINE FAILURE WAS GOING TO OCCUR, I IMMEDIATELY BEGAN A RIGHT TURN BACK TO FLAT TERRAIN ON

THE COMPANY'S PROPERTY. ABOUT HALFWAY BACK TO THE LEVEL TERRAIN (AIRCRAFT WAS CURRENTLY TRANSITIONING OVER THE

RIVERBED AND HEAVY BRUSH) THE ENGINE CONTINUED MAKING ABNORMAL NOISE WITH AN OBVIOUS LOSS OF POWER. AS I

APPROACHED THE LANDING SITE I HAD TO BLEED OFF SOME OF THE AVAILABLE ROTOR RPM TO CLEAR THE EMBANKMENT.

AS THE AIRCRAFT REACHED THE LEVEL TERRAIN, I WAS AT APPROXIMATELY 20 MPH OVER THE GROUND, AND I MADE A SLIGHT PITCH UP TO DECREASE FORWARD MOVEMENT. AS THE AIRCRAFT SETTLED FROM APPROXIMATELY 5' AGL I APPLIED FORWARD CYCLIC TO MAKE CONTACT WITH THE GROUND WITH SKIDS LEVEL AND PULLED THE REMAINING COLLECTIVE IN AN ATTEMPT TO CUSHION THE TOUCH DOWN. THERE WAS NOT ENOUGH ROTOR RPM REMAINING TO CUSHION, AND I ESTIMATE THAT THE AIRCRAFT FELL THROUGH FROM APPROXIMATELY 4-5 FEET.

TOUCH DOWN WAS MODERATELY VIOLENT AS THE MAIN ROTOR DROOPED TO MAKE CONTACT WITH THE UPPER WIRE STRIKE PROTECTION FIXTURE, AND SUBSEQUENTLY SEPARATED FROM THE AIRCRAFT.

NTSB investigation

The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.