CEN26LA221

NTSB accident investigation · Rockwell International S-2R · Gause, TX · May 20, 2026

Accident · No injuriesClass 4 · LimitedFinal report
Date
May 20, 2026, 11:30 local (16:30 UTC)
Place
Gause, TX
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N4990XRockwell International S-2R
Defining event
Maneuvering-low-alt flying: Fuel starvation
Weather
Visual (VMC) · Day
Status
Completed · report September 17, 2026
Report
Approved by Office Director
Investigation class
Class 4 - Basic report with no Prelim publish
NTSB office
Central Region
Parties
FAA
FAA report
20260520009079A
Case key
203151

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 loss of engine power due to fuel starvation. Contributing to the accident was the separated wing fuel tank screen and sealant debris in the fuel tank.

Findings · 2

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.

Fuel systemAircraft › Aircraft systems · Damaged/degradedRockwell International S-2R: 1 caseAll aircraft: 181 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

While returning to the departure airfield after completing an aerial application, the engine lost power and the pilot conducted a forced landing to a field due to insufficient altitude to attempt an engine restart. During the forced landing, the airplane struck trees resulting in substantial damage to the right wing and fuselage. Postaccident examination of the airplane by company personnel revealed that the right-wing fuel screen was not attached and fuel tank sealant debris obstructed the fuel tank outlet port. The pilot reported that the accident could have been prevented by ensuring that all fuel screens are in place each season and removing any loose fuel tank sealant.

Aircraft

Registration
N4990X
Reported as
Rockwell International S-2R
Category
Airplane
Serial number
5035R
Built
1975
Airframe hours
9,844
Engine
Pratt and Whitney PT6A-34, 750 horsepower, turbo prop
Damage
Substantial damage
Flight
Aerial application · Part 137
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · February 1, 2026
Departed
PVT · Bryan, 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
71
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 2, Without waivers/limitations
Last flight review
May 28, 2026
Seat
Center
Restraint
4-point
Flight hours
24,106 total · 8,242 in this make and model · 45 in the last 90 days · 45 in the last 30 days · 5 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
70° at 4 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
75 °F, dew point 68 °F
Altimeter
30.04 inHg
Observed at
KLHB, 10 nm away
METAR
KLHB 201635Z AUTO 07004KT 10SM CLR 24/20 A3004 RMK AO2,M

Docket · 3

The files NTSB released with the investigation on September 17, 2026, on NTSB’s docket system: statements, records, photos and specialists’ reports. 5.2 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.

Other investigations on N4990X · 1

Matched to the same aircraft by N-number and date.