GAA18CA335

NTSB accident investigation · Beech A36 · Gilliam, LA · June 6, 2018

Accident · No injuriesData collectionFinal report
Date
June 6, 2018, 09:10 local (14:10 UTC)
Place
Gilliam, LA
Injuries
4 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N710JTBeech A36
Defining event
Takeoff: Aerodynamic stall/spin
Weather
Visual (VMC) · Day
Status
Completed · report March 18, 2019
Report
Approved by Office Director
NTSB office
General Aviation Accidents
Parties
FAA
FAA report
20180606007129A
Case key
97450

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 exceedance of the airplane’s critical angle of attack during a soft-field takeoff, which resulted in an aerodynamic stall.

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.

Performance/control parameters: angle of attackAircraft › Aircraft oper/perf/capability · Not attained/maintainedBeech A36: 9 casesAll aircraft: 990 casesProbable cause
Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotBeech A36: 43 casesAll aircraft: 9,295 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

The pilot reported that, during a soft-field takeoff from a private grass airstrip, he applied slight aft pressure to the yoke to lighten the load on the nosewheel. The airplane became airborne, but while in ground effect, the left wing dropped about 10º, and the left main landing gear contacted the runway. The airplane settled back on the ground pointing about 30º left of the runway heading. The airplane then departed the runway to the left and ground looped, during which the left landing gear collapsed. The airplane slid backward and came to rest upright on the field adjacent the airstrip. The airplane sustained substantial damage to both ailerons. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. The pilot added that the airplane's weight and balance were within the operational limitations in the Pilot's Operating Handbook. The automated weather observation system located on an airport 18 nautical miles (nm) south of the accident site reported that, about 17 minutes before the accident, the wind was from 90º at 5 knots. An automated weather observation station located on an airport 22 nm southeast of the accident site reported that, about 14 minutes before the accident, the wind was from 110º at 3 knots. The airplane departed from runway 26.

Factual narrative

The pilot reported that, during a soft field takeoff from a private grass airstrip, he applied slight aft pressure to the yoke to lighten the load on the nose wheel. The airplane became airborne, but while in ground effect, the left wing dropped about 10º and the left main landing gear contacted the runway. The airplane settled back on the ground pointing about 30º left of runway heading. The airplane then departed the runway to the left, and ground-looped to the left, which collapsed the left landing gear. The airplane slid backwards and came to rest upright on the cotton field adjacent the airstrip. The airplane sustained substantial damage to both ailerons. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. The pilot added that he the weight and balance calculations were within operational limitations of the Pilot's Operating handbook. The automated weather observation system located on an airport 18 nm south reported that, about 17 minutes before the accident, the wind was 90º at 5 knots. Another automated weather observation station located on an airport 22 nm southeast reported that, about 14 minutes before the accident, the wind was 110º at 3 knots. The airplane departed 26.

Aircraft

Registration
N710JT
Reported as
Beech A36
Category
Airplane
Serial number
E-665
Built
1975
Engine
Lycoming IO 520, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal; Standard, Utility
Departed
LA54 · Gilliam, LA
Destination
LA54 · Gilliam, LA
Airport
LA54 · Gilliam, runway 26, 3,100 × 75 ft, grass/turf
Equipment
Auto-pilot, Stall warning system

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
72
Injuries
None
Certificates
Flight instructor, Airline transport
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 2, With waivers/limitations
Last flight review
October 19, 2016
Seat
Left
Restraint
3-point
Flight hours
18,250 total · 48 in this make and model · 14,000 as pilot in command · 87 in the last 90 days · 52 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
90° at 5 knots
Visibility
6 statute miles
Lowest ceiling
None
Temperature
75 °F, dew point 72 °F
Altimeter
29.93 inHg
Observed at
KDTN, 18 nm away

Docket · 2

The files NTSB released with the investigation on October 4, 2018, on NTSB’s docket system: statements, records, photos and specialists’ reports. 4.0 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 N710JT · 1

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