- Date
- July 26, 1999, 15:30 local (20:30 UTC)
- Place
- Victoria, TX
- Injuries
- 1 uninjured
- Damage
- Substantial damage
- Phase of flight
- Maneuvering
- Aircraft
- N4393SAir Tractor AT-301
- Weather
- Visual (VMC) · Day
- Status
- Completed · report November 30, 2000
- Report
- Approved by Office Director
- FAA report
- 19990726023859A
- Case key
- 46930
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 separation of the engine cowling due to a fractured support bracket, which resulted in the cowling striking and bending four engine push rods causing a loss of engine power. A factor was the lack of suitable terrain for the forced 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.
Analysis
The agricultural airplane was on its first swath run of a boll weevil eradication flight when the engine cowling separated and struck the propeller and engine. The engine lost power, and the pilot executed a forced landing to a cotton field. During the landing roll, the aircraft 'spun' around. The FAA inspector reported that the fractured engine cowling support bracket had a 'dull surface like it had been broken for a while.' Examination of the aircraft's engine revealed that four push rod tubes were bent.
Factual narrative
On July 26, 1999, at 1530 central daylight time, an Air Tractor AT-301 agricultural airplane, N4393S, registered to a private individual and operated by ANF Air Services of Garwood, Texas, was substantially damaged during a forced landing, following a loss of engine power near Victoria, Texas. The commercial pilot, sole occupant of the aircraft, was not injured. Visual meteorological conditions prevailed, and a flight plan was not filed for the 14 Code of Federal Regulations Part 137 aerial application flight. The local flight originated from the Victoria Regional Airport, Victoria, Texas.
According to the FAA inspector, the aircraft was on its first swath run of a boll weevil eradication flight when the engine cowling separated from the aircraft. As the cowling separated it struck the engine and propeller. The engine lost power and the pilot executed a forced landing to a cotton field. During the landing roll, the aircraft "spun" around.
Examination of the aircraft by an FAA inspector revealed that the right main landing gear was sheared off, and the left wing was pulled away from the fuselage. Further examination of the engine revealed that four push rod tubes were bent. According to the FAA inspector, the fractured engine cowling support bracket had a "dull surface like it had been broken for a while."
The pilot and operator failed to return a completed Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1/2.
Aircraft
- Registration
- N4393S
- Reported as
- Air Tractor AT-301
- Category
- Airplane
- Serial number
- 301-0053
- Engine
- P&W R-1340-AN1, 600 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Aerial application · Part 137
- Operator
- Anf Air Services
- Registered owner
- Bobby Addington
- Airworthiness certificate
- Special, Restricted (Special)
- Departed
- VCT
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
- 38
- Certificate
- Commercial
- Airplane ratings
- Single-engine land
- Medical
- Class 2, Valid Medical--w/ waivers/lim
- Seat
- Center
- Flight hours
- 4,990 total
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 180° at 10 knots
- Visibility
- 10 statute miles
- Lowest ceiling
- None
- Temperature
- 90 °F
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.