FTW98LA383

NTSB accident investigation · Air Tractor AT-502B · Portales, NM · September 2, 1998

Accident · Minor injuriesLimited investigationFinal report
Date
September 2, 1998, 17:40 local (23:40 UTC)
Place
Portales, NM
Injuries
1 minor
Damage
Destroyed
Phase of flight
Maneuvering
Aircraft
N50620Air Tractor AT-502B
Weather
Visual (VMC) · Day
Status
Completed · report March 31, 2000
Report
Approved by Office Director
FAA report
19980902022209A
Case key
43848

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 failure to maintain adequate altitude/clearance during an aerial application. Also causal was the inadvertent ground loop/swerve during the landing.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

In flight collision with objectManeuvering - aerial application
Object - otherFactor
Altitude/clearance - inadequatePilot in commandCause
Diverted attentionPilot in commandCause
In flight collision with terrain/waterLanding
Ground loop/swerve - inadvertentPilot in command

Analysis

The pilot was flying westbound into the sun (275 degrees, 7 degrees above the horizon) during an aerial application pass over a cotton field. There was a circular pivotal sprinkler system which extended from the northern center of the field to the southeast. The pilot said that he looked over to adjust his onboard global positioning system and he struck the sprinkler. The impact separated the left main landing gear and initiated a fire in the right hand forward part of the cockpit. The pilot landed the airplane in the adjacent peanut field and the airplane ground looped during the emergency landing attempt. The airplane was destroyed during the subsequent post landing fire.

Factual narrative

On September 2, 1998, approximately 1740 mountain daylight time, an Air Tractor AT-502B, N50620, was destroyed by fire following an emergency landing near Portales, New Mexico. The commercial pilot, the sole occupant in the airplane, received minor injuries. The airplane was owned/operated by King AG Leasing Inc. under Title 14 CFR Part 137. Visual meteorological conditions prevailed for the local aerial application flight which originated approximately 25 minutes before the accident. No flight plan had been filed.

According to the pilot, he had flown 7 or 8 east-west passes over a cotton field, and was flying westbound into the sun (266 degrees, 19 degrees above the horizon). He said that there was a circular pivotal sprinkler extending from the northern center of the field to the southeast. He was adjusting his onboard global positioning system (GPS) and when he looked up, "I was right at the sprinkler." He said that he "immediately pulled up elevator but still struck the sprinkler." The pilot stated that a fire broke out in the right hand forward part of the cockpit and he knew he had to get out as soon as possible.

The pilot reported that the sprinkler impact had separated the left main landing gear and when he landed in the adjacent peanut field, the airplane ground looped to the left. He further stated that when the airplane came to rest, "I opened the left cockpit door and bailed out as quick as possible." The pilot received second degree burns on his right hand and arm, and first degree burns on his face.

Aircraft

Registration
N50620
Reported as
Air Tractor AT-502B
Category
Airplane
Serial number
502B-0457
Airframe hours
780
Engine
P&W PT6-34AG, 750 horsepower, turbo prop
Damage
Destroyed
Fire
In-Flight
Flight
Aerial application · Part 137
Registered owner
King Ag Leasing Inc.
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · August 31, 1998 · 40 hours before
Departed
NONE · Private Strip, TX
Destination
NONE · Sudan, TX

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
45
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Center
Flight hours
7,255 total · 750 in this make and model · 7,195 as pilot in command · 290 in the last 90 days · 170 in the last 30 days · 6 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
140° at 10 knots
Visibility
7 statute miles
Lowest ceiling
23,000 ft broken
Temperature
91 °F, dew point 46 °F
Altimeter
30.00 inHg
Observed at
CVN, 15 nm away

FAA reports on this event · 1

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