20241218019229A

Accident · Substantial damage

FAA accident report · Air Tractor AT-504 · Big Cypress, FL · December 18, 2024

Date
December 18, 2024 · 15:18 local
Place
Big Cypress, FL
Phase of flight
Descent
Operating rules
General operating rules (Part 91)
Damage
Substantial damage
Aircraft
N8516V
NTSB investigation
NTSBERA25LA079
Reported as
Air Tractor AT-504
Reported engine
Pratt & Whitney PT6A series
People aboard
1
Fatal injuries
0
Other injuries
0
Pilot’s certificate
Commercial pilot
Pilot’s flight hours
3,132 total2,800 in this make and model

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.

At an altitude of approx. 9000 feet, pilot said he felt a "violent yaw" to the left but stated he never heard any

Associated noises. He pushed the right rudder pedal full forward with no affect and the airplane continued in a left turn, circling and slightly nose down. He then stated that he applied right aileron to attempt to counter the left turn which helped but not enough. He decided to retard the engine throttle to idle, which he said made the spinning

Worse, so he advanced it back to mid throttle. He stated that the combination of the right aileron position and

Engine power setting gave him a "best case situation" but was still unable to regain control of the airplane. The aircraft continued left turn to the ground.

As the FAA filed it

AT AN ALTITUDE OF APPROX. 9000 FEET, PILOT SAID HE FELT A "VIOLENT YAW" TO THE LEFT BUT STATED HE NEVER HEARD ANY

ASSOCIATED NOISES. HE PUSHED THE RIGHT RUDDER PEDAL FULL FORWARD WITH NO AFFECT AND THE AIRPLANE CONTINUED IN A LEFT TURN, CIRCLING AND SLIGHTLY NOSE DOWN. HE THEN STATED THAT HE APPLIED RIGHT AILERON TO ATTEMPT TO COUNTER THE LEFT TURN WHICH HELPED BUT NOT ENOUGH. HE DECIDED TO RETARD THE ENGINE THROTTLE TO IDLE, WHICH HE SAID MADE THE SPINNING

WORSE, SO HE ADVANCED IT BACK TO MID THROTTLE. HE STATED THAT THE COMBINATION OF THE RIGHT AILERON POSITION AND

ENGINE POWER SETTING GAVE HIM A "BEST CASE SITUATION" BUT WAS STILL UNABLE TO REGAIN CONTROL OF THE AIRPLANE. THE AIRCRAFT CONTINUED LEFT TURN TO THE GROUND.

NTSB investigation

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