- Date
- June 22, 2017, 16:00 local (22:00 UTC)
- Place
- Portales, NM
- Injuries
- 1 uninjured
- Damage
- Destroyed
- Phase of flight
- Maneuvering
- Aircraft
- N700LAAir Tractor AT 502
- Defining event
- Maneuvering-low-alt flying: Loss of control in flight
- Weather
- Visual (VMC) · Day
- Status
- Completed · report October 31, 2017
- Report
- Approved by Office Director
- NTSB office
- General Aviation Accidents
- Parties
- FAA/ FSDO
- FAA report
- 20170622008589A
- Case key
- 95424
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
Probable cause
The pilot's decision to fly the airplane under transmission lines while maneuvering at low altitude in high-density altitude conditions, which resulted in subsequent collision with terrain.
Findings · 6
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.
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
The pilot reported that, during an agricultural application flight and while maneuvering at the destination field in a left turn, he realized that the airplane was not going to be able to climb over transmission lines in his flightpath. He added that he lowered the nose to fly under the transmission lines, but the "airspeed was still too low," and the airplane impacted an embankment, slid across the ground for about 100 ft, and nosed over. The airplane was destroyed by the impact and a postcrash fire. The pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation. An automated weather observation station 10 nautical miles north of the accident reported, about 5 minutes before the accident, calm wind, temperature 102°F (39°C), dewpoint 43°F (6°C), and barometric setting of 29.77 inches of mercury. The calculated density altitude was 8,200 ft. According to the Federal Aviation Administration Koch Chart, considering the surrounding temperature and field elevation, the airplane would have likely experienced a 65% decrease in the normal climb rate.
Factual narrative
The pilot reported that, during an aerial application flight while maneuvering at the destination field in a left turn, he realized that the airplane was not going to be able to climb over transmission lines in his flight path. He added that he lowered the nose to fly under the transmission lines, but the "airspeed was still too low" and the airplane impacted an embankment, slid across the ground for about 100 ft., and nosed over. The airplane was destroyed by the impact and a post-crash fire. The pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation. An automated weather observation station, 10 nautical miles north of the accident, about 5 minutes before the accident, reported the wind as calm, temperature 102°F (39°C), dewpoint 43°F (6°C), and barometric setting of 29.77" Hg. The calculated density altitude was 8,200 ft. According to the Federal Aviation Administration Koch Chart, when considering the surrounding temperature and field elevation, the airplane would have likely experienced a 65% decrease in the normal climb rate.
Aircraft
- Registration
- N700LA
- Reported as
- Air Tractor AT 502 (B)
- Category
- Airplane
- Serial number
- 502B-0700
- Built
- 2004
- Airframe hours
- 6,435
- Engine
- P&W Canada PT6A-34AG, 750 horsepower, turbo prop
- Damage
- Destroyed
- Fire
- On-Ground
- Flight
- Aerial application · Part 137
- Operator
- King AG Aviation Inc.
- Registered owner
- King Ag Leasing Inc.
- Airworthiness certificate
- Special, Restricted (Special)
- Last inspection
- 100 hour · May 17, 2017
- Departed
- XA05 · Sudan, TX
- Destination
- XA05 · Sudan, TX
- Equipment
- Satellite tracking device
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
- 32
- Injuries
- None
- Certificate
- Commercial
- Airplane ratings
- Single-engine land
- Instrument ratings
- Airplane
- Medical
- Class 2, With waivers/limitations
- Last flight review
- July 17, 2016
- Seat
- Single
- Flight hours
- 2,050 total · 1,326 in this make and model · 1,900 as pilot in command · 75 in the last 90 days · 30 in the last 30 days
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- Calm
- Visibility
- 10 statute miles
- Temperature
- 102 °F, dew point 43 °F
- Altimeter
- 29.77 inHg
- Observed at
- KCVS, 10 nm away
Docket · 2
The files NTSB released with the investigation on September 25, 2017, on NTSB’s docket system: statements, records, photos and specialists’ reports. 3.9 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.