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Aircraft record

N4026S1978 Hiller UH-12E

DeregisteredUnclaimedSource: FAA, updated Oct 18, 2026

This N-number isn't registered right now. Below is its last known registration, canceled Nov 4, 2002.

Safety record in brief:2 NTSB accidents (destroyed damage at worst, latest Oct 1993)2 ADs may apply

Registration
Deregistered
Last based in
Benson, MN
owner city / state
Owners
1
since 1993
NTSB events
2
destroyed, 1993
ADs may apply
2
confirm with A&P
Service reports
0
since 1995

Registration

FAA Aircraft Registry · Oct 18, 2026
Last registered owner
Bonanza Valley Aviation INC
Owner type
Corporation
City, state
Benson, MN
Certificate issued
Apr 15, 1993
Canceled
Nov 4, 2002
Airworthiness
Experimental · Research and Development
Airworthiness date
Mar 27, 1981

We never show street addresses, even though they appear in the public FAA file. Individual owners are shown by city and state only.

Airframe & engine

FAA Registry + type data

Airframe

Manufacturer
Hiller
Model
UH-12E
Year
1978
Serial number
5055
Aircraft type
Rotorcraft
Category
Land
Certification
Type Certificated
Seats
4
Engines
1
Max takeoff weight
Up to 12,499 lb
Type certificate data sheet
4H11
Mode S code
A4B74A

Engine

Make and model
Lycoming Vo-540 Series
Type
Reciprocating
Power
310 hp

Total time and engine hours aren't public. They appear here once the owner adds logbooks.

Ownership history

Ownership history from FAA records
  1. 1993 – 2002Bonanza Valley Aviation INCBenson, MN
  2. 1972 – 1973United Aircraft CorpStratford, CT · different airframe: 1972 Sikorsky S-65c3 S/N 65351

Individual owners are shown by city and state only.

Safety record

NTSB · Oct 15, 2026 · FAA ADs · Oct 18, 2026 · SDRs · Oct 16, 2026

NTSB events (2)

Accident · destroyed

Oct 22, 1993 · Sioux Rapids, IA

the Pilot in Command failed to maintain clearance with the terrain while proceeding up an upslope.

Damage
Destroyed
Injuries
None
Report
CHI94LA022

From NTSB records; matched by serial number.Read NTSB report (search CAROL for CHI94LA022)

Accident · substantial damage

Aug 20, 1982 · Chandler, AZ

THE PILOT WAS SPRAYING LIQUID CHEMICALS AT NIGHT. THE PILOT FLEW INTO HIS OWN WAKE TURBULENCE AND LOST CONTROL AND COLLIDED WITH THE GROUND. CONTROL WAS REGAINED TO MAKE AN UPRIGHT LANDING IN THE FIELD. SKIDS WERE TORN OFF THE AIRCRAFT.

Damage
Substantial
Injuries
None
Report
LAX82DA306

From NTSB records; matched by serial number.Read NTSB report (search CAROL for LAX82DA306)

Accident history for this model

ADs published since 1998 that may apply (2)

These match the airframe or engine model. Whether each one applies, and whether it's been complied with, depends on serial numbers, equipment and logbook entries. Applicability must be confirmed by a mechanic against the aircraft's records.

ADSubjectEffectiveApplies to
97-20-15Hiller Aircraft Corporation Model UH- 12A, UH-12B, UH-12C, UH-12D, and UH-12E HelicoptersNov 12, 1997Airframe (UH-12E)
97-10-16Hiller Aircraft Corporation Model UH- 12, UH-12A, UH-12B, UH-12C, UH-12D, UH-12E…Jun 27, 1997Airframe (UH-12E)Only with: Having control rotor blade spar tube P/N 36003, 36006, 36129, 36129-25, 36203, 36203-15, 36203-21, or 36209-3, or cuff P/N 36101-1, 36101-4, 36108, 36115-1, 36115-4, 36115-6, 36115-8, or 36124 installed; includes UH-12D and UH-12E converted to turbine power per STC SH177WE and SH178WE.

AI-extracted — verify against original. Matched from each AD's applicability section; ADs replaced by a later AD are left out.

Service Difficulty Reports (0)

No Service Difficulty Reports found for this airframe since 1995.

Sources

  • FAA Aircraft RegistryRegistration, owner city and state, airframe, engineupdated Oct 18, 2026
  • NTSB accident and incident databaseAccidents and incidents since 1982updated Oct 15, 2026
  • FAA Airworthiness Directives (Federal Register)ADs published since 1998updated Oct 18, 2026
  • FAA Service Difficulty ReportsReports since 1995updated Oct 16, 2026

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