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Aircraft record

N623771958 Hiller H-23D

DeregisteredUnclaimedSource: FAA, updated Oct 17, 2026

This N-number isn't registered right now. Below is its last known registration, canceled Apr 29, 2013.

Safety record in brief:2 NTSB accidents (substantial damage at worst, latest Mar 1984)1 AD may apply

Registration
Deregistered
Last based in
Naselle, WA
owner city / state
Engine
VO-435 SERIES · 260 hp
Lycoming
Owners
1
since 1978
NTSB events
2
substantial, 1984
ADs may apply
1
confirm with A&P
Service reports
0
since 1995

Registration

FAA Aircraft Registry · Oct 17, 2026
Last registered owner
Top Flight Helicopters INC
Owner type
Corporation
City, state
Naselle, WA
Certificate issued
Sep 25, 1978
Canceled
Apr 29, 2013
Airworthiness
Standard
Airworthiness date
Mar 7, 1975

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
H-23D
Year
1958
Serial number
1152
Aircraft type
Rotorcraft
Category
Land
Certification
Type Certificated
Seats
4
Engines
1
Max takeoff weight
Up to 12,499 lb
Type certificate data sheet
4H10
Mode S code
A824CF

Engine

Make and model
Lycoming Vo-435 Series
Type
Reciprocating
Power
260 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. 1978 – 2013Top Flight Helicopters INCNaselle, WA
  2. Date unknownIndividual ownerdifferent airframe: 1943 Cessna T-50 S/N 6264

Individual owners are shown by city and state only.

Safety record

NTSB · Oct 15, 2026 · FAA ADs · Oct 17, 2026 · SDRs · Oct 16, 2026

NTSB events (2)

Accident · substantial damage

Mar 12, 1984 · Forest Grove, OR

THE PLT REPORTED THAT WHILE HOVERING, DURING AN EXTERNAL LOAD OPERATION, THE ENG LOST POWER & BLUE SMOKE & FLAMES EXITED THE BACK OF THE HELICOPTER. THE HELICOPTER THEN STRUCK TREES BEFORE COMING TO REST. DURING AN INVESTIGATION, THE ENG STARTED NORMALLY & WAS RUN TO 56% (N1) & 88% (N2). NO CONTAMINENTS WERE FOUND IN THE FUEL SYS.

Damage
Substantial
Injuries
None
Report
SEA84LA066

From NTSB records; matched by serial number.Read NTSB report (search CAROL for SEA84LA066)

Accident · minor damage

Apr 23, 1982 · Christmas Valle, OR

THE HELICOPTER WAS BEING USED TO STRING A TRANSMISSION LINE. A ROPE (ATTACH LINE) WAS USED TO CONNECT THE HELICOPTER TO THE TRANSMISSION LINE. THE ROPE BECAME DETACHED AND THE PILOT LANDED TO HAVE IT REATTACHED. A MAN, INVOLVED IN THE GROUND OPERATIONS, APPROACHED THE HELICOPTER WHILE PULLING THE ROPE WIHT HIS RIGHT HAND. THE OTHER END OF THE ROPE EXTENDED UP TO THE TOP OF A 100 FT TOWER WHERE…

Damage
Minor
Injuries
Serious
Report
SEA82DA057

From NTSB records; matched by N-number.Read NTSB report (search CAROL for SEA82DA057)

Accident history for this model

ADs published since 1998 that may apply (1)

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
97-10-16Hiller Aircraft Corporation Model UH- 12, UH-12A, UH-12B, UH-12C, UH-12D, UH-12E…Jun 27, 1997Airframe (H-23D)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.

Related aircraft

Show all 8 related aircraft
All 6 registered Hiller H-23D aircraft

Sources

  • FAA Aircraft RegistryRegistration, owner city and state, airframe, engineupdated Oct 17, 2026
  • NTSB accident and incident databaseAccidents and incidents since 1982updated Oct 15, 2026
  • FAA Airworthiness Directives (Federal Register)ADs published since 1998updated Oct 17, 2026
  • FAA Service Difficulty ReportsReports since 1995updated Oct 16, 2026

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