ERA22FA279

NTSB accident investigation · Bell UH-1B · Amherstdale, WV · June 22, 2022

Accident · FatalClass 1 · FieldFinal report
Date
June 22, 2022, 16:45 local (20:45 UTC)
Place
Amherstdale, WV · Blair Mountain Hwy & Kelly Hollow Road
Injuries
6 fatal
Damage
Destroyed
Phase of flight
Emergency descent
Aircraft
N98FBell UH-1B
Defining event
Autorotation: Collision with terr/obj (non-CFIT)
Weather
Visual (VMC) · Day
Status
Completed · report August 14, 2024
Report
Board-adopted by Notation
Investigation class
Class 1
NTSB office
Eastern Region Aviation
Parties
FAA/AVP100, Ozark Aeroworks, LLC
Safety recommendations
Yes
FAA report
20220622023339A
Case key
105306

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 operator’s failure to adequately inspect the former military turbine powered helicopter, which allowed an engine issue to progress and result in a loss of engine power and a subsequent loss of control after the helicopter struck powerlines during a forced landing. Also causal to the accident were the following: 1) the Federal Aviation Administration’s (FAA) inadequate inspection and maintenance standards for former military turbine powered aircraft operating with an experimental exhibition airworthiness certificate; 2) the operator’s use of those standards instead of more rigorous standards, which were readily available to the operator and previously used to inspect and maintain the helicopter; and 3) the FAA’s inadequate oversight of the operator, which did not detect the inherent risk associated with the operation.

Findings · 6

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.

Safety programs: adequacy of safety programOrganizational issues › Support/oversight/monitoring · FAA/RegulatorBell UH-1B: 1 caseAll aircraft: 24 casesProbable cause
Engine (turbine/turboprop): turbine sectionAircraft › Aircraft power plant · FailureBell UH-1B: 1 caseAll aircraft: 74 casesProbable cause
AircraftAircraft › Aircraft power plant · Inadequate inspectionBell UH-1B: 2 casesAll aircraft: 151 casesProbable cause
Inspection: scheduled/routine inspectionPersonnel issues › Task performance · Owner/builderBell UH-1B: 1 caseAll aircraft: 167 casesProbable cause
Policy/procedure: adequacy of policy/procOrganizational issues › Management · OperatorBell UH-1B: 1 caseAll aircraft: 106 casesProbable cause
Oversight: oversight of operationOrganizational issues › Support/oversight/monitoring · FAA/RegulatorBell UH-1B: 1 caseAll aircraft: 61 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

On June 22, 2022, about 1645 eastern daylight time, a Bell Helicopter UH-1B helicopter, N98F, was destroyed when it was involved in an accident in Amherstdale, West Virginia. About 15 minutes after the flight departed, the helicopter impacted two powerlines and a rock face during a forced landing, and a postcrash fire ensued. The pilot and five passengers were fatally injured. The helicopter was operated by MARPAT Aviation under the provisions of Title 14 Code of Federal Regulations Part 91

Aircraft

Registration
N98F
Reported as
Bell UH-1B
Category
Helicopter
Serial number
488 (62-1968)
Built
1962
Airframe hours
9,029.3
Engine
Avco Lycoming T53-L-11D, 1,100 horsepower, turbo shaft
Damage
Destroyed
Fire
On-Ground
Flight
Other work use · Part 91
Registered owner
Prescott Gordon F
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Annual · March 29, 2022
Departed
6L4 · Logan, WV
Airport
6L4 · Logan County
Equipment
ADS-B, 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 · 3

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
53
Injuries
Fatal
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, With waivers/limitations
Last flight review
June 16, 2022
Seat
Left
Restraint
4-point
Toxicology
Performed
Flight hours
493.1 total · 21.1 in this make and model · 6.5 in the last 90 days
Role
Pilot-rated passenger
Age
51
Injuries
Fatal
Certificates
Flight instructor, Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, With waivers/limitations
Seat
Right
Restraint
Lap only
Toxicology
Performed
Flight hours
1,400 total
Role
Pilot-rated passenger
Age
69
Injuries
Fatal
Certificate
Commercial
Instrument ratings
Helicopter
Seat
Right
Restraint
4-point
Toxicology
Performed
Flight hours
50 total

Weather

Conditions
Visual (VMC) · Day
Wind
Variable at 6 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
90 °F, dew point 70 °F
Altimeter
30.00 inHg
Turbulence
Unknown
Observed at
6L4, 3.3 nm away
METAR
METAR K6L4 222045Z AUTO VRB06KT 10SM SCT049 32/21 A3000 RMK A02

Docket · 30

The files NTSB released with the investigation on August 27, 2024, on NTSB’s docket system: statements, records, photos and specialists’ reports. 117 MB in all.

Operations group chair's factual reportItem 1 · PDF · 29 pages · 2 photos · 1.7 MBOperations attachment 1 - interviewsItem 2 · PDF · 109 pages · 485 KBOperations - attachment 2 - witness interviewsItem 3 · PDF · 20 pages · 6.0 MBOperations attachment 3 - FAA interview summariesItem 4 · PDF · 8 pages · 67 KBOperations attachment 4 - pilot informationItem 5 · PDF · 2 pages · 84 KBOperations attachment 5 - N98F airworthiness recordsItem 6 · PDF · 117 pages · 10.4 MBOperations attachment 6 - N98F registration informationItem 7 · PDF · 57 pages · 7.8 MBOperations attachment 7 - marpat fueling recordsItem 8 · PDF · 3 pages · 463 KBOperations attachment 8 - army UH-1B technical manual excerptsItem 9 · PDF · 27 pages · 9.6 MBOperations attachment 9 - army UH-1B pilot checklistItem 10 · PDF · 50 pages · 9.7 MBOperations attachment 10 - safety pilot's UH-1B checklistItem 11 · PDF · 7 pages · 130 KBOperations - attachment 11 - marpat websiteItem 12 · PDF · 17 pages · 7.1 MBOperations attachment 12 - marpat program letters (2014-2022)Item 13 · PDF · 3 pages · 124 KBOperations attachment 13 - FAA legal interpretationsItem 14 · PDF · 4 pages · 860 KBMaterials laboratory factual report 22-054Item 15 · PDF · 3 pages · 4 photos · 475 KBMaterials laboratory factual report 23-005Item 16 · PDF · 32 pages · 52 photos · 7.5 MBAirworthiness group chair's factual reportItem 17 · PDF · 34 pages · 20 photos · 4.8 MBAirworthiness attachment 1 - FAA order 8130.2G excerptItem 18 · PDF · 18 pages · 508 KBAirworthiness attachment 2 - FAA order 8130.2G deviation memoItem 19 · PDF · 16 pages · 117 KBAirworthiness attachment 3 - FAA order 8130.2H excerptItem 20 · PDF · 21 pages · 628 KBAirworthiness attachment 4 - FAA order 8130.2J excerptItem 21 · PDF · 33 pages · 1.4 MBAirworthiness attachment 5 - FAA ac 43-209AItem 22 · PDF · 13 pages · 79 KBAirworthiness attachment 6 - UH-1 inspection planning guideItem 23 · PDF · 72 pages · 1.1 MBAirworthiness attachment 7 - marpat work ordersItem 24 · PDF · 19 pages · 1.7 MBAirworthiness attachment 8 - select N98F recordsItem 25 · PDF · 14 pages · 21.3 MBRelease of aircraft wreckage, NTSB form 6120.15Item 26 · PDF · 1 page · 1.2 MBEvidence control formsItem 27 · PDF · 5 pages · 13.9 MBPowerplants factualItem 28 · PDF · 44 pages · 7.5 MBMarpat UH-1B 100-hour/annual inspection checklistItem 29 · PDF · 6 pages · 225 KBToxicological report - pilot in commandItem 30 · PDF · 1 page · 181 KB

FAA reports on this event · 1

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