ERA23LA122

NTSB accident investigation · Aero Commander 500 · Sylacauga, AL · January 28, 2023

Accident · Serious injuriesClass 3 · LimitedFinal report
Date
January 28, 2023, 17:51 local (23:51 UTC)
Place
Sylacauga, AL
Injuries
1 serious
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N107DFAero Commander 500
Defining event
Enroute: Fuel exhaustion
Weather
Visual (VMC) · Dusk
Status
Completed
Report
Approved by Office Director
Investigation class
Class 3
NTSB office
Eastern Region Aviation
Parties
FAA/FSDO
FAA report
20230128001989A
Case key
106651

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 assure there was an adequate amount of fuel onboard to complete the flight, which resulted in a loss of engine power due to fuel exhaustion.

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.

Inspection: preflight inspectionPersonnel issues › Task performance · PilotAero Commander 500-B: 2 casesAll aircraft: 551 casesProbable cause
Fluids: fuelAircraft › Fluids/misc hardware · Fluid levelAero Commander 500-B: 5 casesAll aircraft: 1,695 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 was taking the airplane on a flight to another airport for maintenance. During the preflight inspection, the pilot turned on the electrical power and noticed that the fuel gauge was indicating 80 gallons of fuel. The pilot reported the airplane holds a maximum of 156 gallons of fuel and he calculated that he needed 113 gallons of fuel to legally complete the flight. He informed the fixed base operator (FBO) that he wanted the fuel tanks topped off, but was informed by the ramp technician that the fuel tanks were full and he did not need fuel. The pilot went back to the airplane and removed the fuel cap. He noticed fuel in the filler neck and assumed the fuel tanks were full. He did not push open the anti-siphon fuel valve to see if the tanks were full or if residual fuel was pooled on top of the anti-siphon fuel valve. When the pilot started the engines, he noticed the fuel gauge was flickering and thought it was malfunctioning. He proceeded to depart for the maintenance base. After about 2 hours of flight time both engines lost power. Unable to reach the closest airport, the pilot executed an off-field landing in a cotton field. After landing, the airplane rolled into the trees and the left wing separated from the fuselage. The airplane sustained substantial damage to the left and right wings. According to the fueler at the FBO, she drove out to the airplane to fuel it on the morning of the accident and, after removing the single fuel cap, saw fuel on top of the anti-siphon valve. She used her finger to push down the valve and felt fuel, so she believed the airplane was full of fuel and it did not need additional fuel. Both wing fuel bladders were breached during the accident and a minor amount of fuel was leaked onto the ground. Personnel from the company who recovered the wreckage stated that there was no fuel in the fuel tanks when the airplane was recovered. The fuel quantity transmitter was sent to the manufacturer for examination. Testing of the transmitter revealed no anomalies with the unit. Based on this information, it is likely that the pilot erred in his assessment of the airplane’s fuel quantity prior to departing on the accident flight and that the available quantity of fuel was exhausted, which resulted in the total loss of engine power and the subsequent forced landing.

Factual narrative

On January 28, 2023, at 1751 central standard time, an Aero Commander 500-B, N107DF, was substantially damaged when it was involved in an accident near Sylacauga, Alabama. The pilot was seriously injured. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 positioning flight. According to the pilot, he flew a different airplane to the Tampa Executive Airport (VDF), Tampa, Florida, and intended to reposition the accident airplane, which was due for a 100-hour inspection, to Birmingham-Shuttlesworth International Airport (BHM), Birmingham, Alabama, for maintenance. During the preflight inspection, the pilot turned on electrical power and noticed that the fuel gauge was reading 80 gallons of fuel. He walked into the FBO at VDF and requested that the airplane’s fuel tanks be topped off. A ramp technician reported that the fuel tanks were already full. The pilot subsequently removed the airplane’s fuel cap, noticed fuel in the filler neck and assumed the fuel tanks were full. He did not push open the anti-siphon fuel valve to see if the tanks were full. The pilot reported the airplane holds a maximum of 156 gallons of fuel and he calculated that he needed 113 gallons of fuel to legally complete the flight. According to the fueler at the FBO, she removed the airplane’s single fuel cap and saw fuel on top of the anti-siphon valve. She used her finger to push down the valve and felt fuel, so she believed the airplane was full of fuel and it did not need additional fuel. The pilot completed the preflight inspection checklist and started the engines. He noticed the fuel gauge was flickering and thought it was malfunctioning. He proceeded to depart for BHM. After about 2 hours of flight time, the airplane’s right engine lost power and, a few seconds later, the left engine also lost power. He did not look at the fuel gauge during this time. He notified the air traffic controller of the loss of power to both engines and was vectored towards Merkel Field Sylacauga Municipal Airport (SCD), Sylacauga, Alabama. The airplane was unable to reach the runway and the pilot performed a landing in a cotton field. After landing, the airplane rolled into trees and the left wing separated from the fuselage. Federal Aviation Administration inspectors who examined the airplane at the accident site noted the airplane sustained substantial damage to the left and right wings. They also noted that both wing fuel bladders were breached and noted minor fuel leakage on the ground adjacent to the wing. Personnel with the wreckage recovery company stated that there was no fuel in the airplane’s fuel tanks at the accident site. When electrical power was applied to the airplane, the fuel gauge read 68 gallons of fuel. The fuel transmitter was sent to the manufacturer for examination. Testing of the transmitter revealed no anomalies with the unit.

Aircraft

Registration
N107DF
Reported as
Aero Commander 500 (B)
Category
Airplane
Serial number
500B-1191-97
Built
1962
Airframe hours
20,061
Engines
Lycoming io-540, 290 hp, reciprocatingLycoming io-540, 290 hp, reciprocating
Damage
Substantial damage
Flight
Positioning · Part 91
Operator
Central Air Southwest Inc
Registered owner
Central Airlines Inc
Airworthiness certificate
Standard, Normal
Last inspection
AAIP · December 14, 2022
Departed
VDF · Tampa, FL
Destination
BHM · Birmingham, AL
Flight plan
IFR
Airport
SCD · Merkel Fld Sylacauga Muni, runway 09, 5,390 × 100 ft, asphalt
Equipment
ADS-B, Stall warning system, Handheld GPS

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
25
Injuries
Serious
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, Without waivers/limitations
Last flight review
December 17, 2022
Seat
Left
Restraint
Lap only
Flight hours
1,337 total · 366 in this make and model · 1,248 as pilot in command · 260 in the last 90 days · 99 in the last 30 days · 9 in the last 24 hours

Weather

Conditions
Visual (VMC) · Dusk
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
10,000 ft overcast
Temperature
54 °F, dew point 23 °F
Altimeter
30.28 inHg
Icing
Clear
Observed at
KSCD, 2 nm away
METAR
KSCD 282355Z AUTO 00000KT 10SM OVC100 12/M05 A3028 RMK AO2 T01211050 10163 20121

Docket · 7

The files NTSB released with the investigation on May 2, 2024, on NTSB’s docket system: statements, records, photos and specialists’ reports. 7.5 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.