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NTSB accident investigation · Air Tractor AT 502 · Delhi, LA · June 15, 2016

Accident · No injuriesData collectionFinal report
Date
June 15, 2016, 18:30 local (23:30 UTC)
Place
Delhi, LA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N1002LAir Tractor AT 502
Defining event
Landing-landing roll: Loss of control on ground
Weather
Visual (VMC) · Dusk
Status
Completed · report September 12, 2016
Report
Approved by Office Director
NTSB office
General Aviation Accidents
Parties
FAA
FAA report
20160615012169A
Case key
93399

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

The pilot's inability to maintain directional control during the landing roll as a result of a piece of concrete from the runway impacting the right main landing gear brake during the landing roll, resulting in a right brake failure and a ground loop.

Findings · 4

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Object/animal/substance: debris/dirt/foreign objectEnvironmental issues › Physical environment · Effect on operationAir Tractor AT-502: 1 caseAll aircraft: 101 casesProbable cause
Performance/control parameters: directional controlAircraft › Aircraft oper/perf/capability · Attain/maintain not possibleAir Tractor AT-502: 6 casesAll aircraft: 3,958 casesProbable cause

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

During a telephone interview, the pilot of a tailwheel equipped airplane reported that during the landing roll on a private agricultural airstrip, a piece of concrete from the runway chipped off and hit the right brake. The pilot further reported that he applied the brakes to stop on the runway and then ground looped to the left. During the ground loop, the fuselage sustained substantial damage. The pilot reported there were no preimpact mechanical failures or malfunctions with the airframe or engine that would have precluded normal operation. A postaccident mechanical inspection revealed that the hydraulic line on the right main landing gear was severed, which would have made the right brake inoperable.

Factual narrative

During a telephone interview, the pilot of a tailwheel equipped airplane reported that during the landing roll on a private agricultural airstrip, a piece of concrete from the runway chipped off and hit the right brake. The pilot further reported that he applied the brakes to stop on the runway and then ground looped to the left. During the ground loop, the fuselage sustained substantial damage. The pilot reported there were no preimpact mechanical failures or malfunctions with the airframe or engine that would have precluded normal operation. A postaccident mechanical inspection revealed that the hydraulic line on the right main landing gear was severed, which would have made the right brake inoperable.

Aircraft

Registration
N1002L
Reported as
Air Tractor AT 502 (UNDESIGNAT)
Category
Airplane
Serial number
502-0018
Built
1988
Airframe hours
15,764
Engine
P&W Canada PT6A-34AGJ, turbo prop
Damage
Substantial damage
Flight
Aerial application · Part 137
Airworthiness certificate
Standard, Normal
Last inspection
Annual · December 19, 2015
Departed
Delhi, LA
Destination
Delhi, LA
Flight plan
Unknown
Equipment
None

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
33
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land
Instrument ratings
Airplane, Helicopter
Medical
Class 2, Without waivers/limitations
Last flight review
March 15, 2016
Seat
Front
Restraint
Lap only
Flight hours
3,750 total · 1,300 in this make and model

Weather

Conditions
Visual (VMC) · Dusk
Wind
Calm
Visibility
8 statute miles
Temperature
82 °F, dew point 79 °F
Altimeter
29.92 inHg
Observed at
KTVR, 26 nm away

Docket · 5

The files NTSB released with the investigation on August 31, 2016, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.5 MB in all.

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.