Hiller OH-23
15 on the U.S. register across 4 versions the FAA records separately. Built from 1951 to 1973; half of them date from 1958 or earlier. Texas has the most (4). 27% are registered to companies, flight schools, clubs and other organisations; the rest to individuals, who are not named here at this time.
About the OH-23 from the FAA's model table
- Type
- Rotorcraft · Helicopters
- Power
- Piston (reciprocating), 1 engine
- Common engines
- Franklin 6V-335 Series (2), None None (1), Franklin 6Vs-335 Ser (1)
- Seats
- 4
- Cruise speed
- about 63 mph
- Built of
- steel tube and aluminium
- Maker on the register
- Hiller
- Registered
- earliest certificate September 9, 1998; newest August 7, 2023
Where they are owner's state
Who owns them registrant type
By owner type, as a table
| aircraft | share | |
|---|---|---|
| Individual | 10 | 67% |
| Corporation | 4 | 27% |
| Co-owned | 1 | 7% |
Versions as the FAA records them · click one to list only those aircraft
When they were built by decade · 4 with no year on file
Registration status
By status, as a table
| aircraft | share | |
|---|---|---|
| Valid | 14 | 93% |
| Sale reported | 1 | 7% |
Airworthiness certificate class
Biggest operators companies, schools and clubs
Largest fleets, as a table
| aircraft | |
|---|---|
| Fort Wolters Helicopter INC | 2 |
| Summit Sales & Leasing INC | 1 |
| Alaska Army Aviation Museum INC | 1 |
Fleet pages: Fort Wolters Helicopter INC
Accident history NTSB records · 4 cases since 1982, 0 fatal
The 4 most recent of 4 cases where the NTSB's make and model match this family's versions. Each aircraft's own page also shows its record. How this model compares with others, with the fleet taken into account: Accidents by model in Aviation Analytics.
Questions people ask answers refresh every morning
How many Hiller OH-23 aircraft are registered in the U.S.?
15 as of October 23, 2026, counting 4 versions the FAA records separately.
Which state has the most Hiller OH-23s?
Texas, with 4.
Who owns the Hiller OH-23?
27% are registered to companies, flight schools, clubs and other organisations; the rest to individuals and co-owners, who are not named on this site at this time.
When were the Hiller OH-23s on the register built?
Between 1951 and 1973; half of them in 1958 or earlier.
How many Hiller OH-23 accidents has the NTSB recorded?
4 accidents and incidents since 1982, 0 of them fatal. A model flown more shows more; the accident analytics compare models per thousand registered.
What is the Hiller OH-23 made of?
A welded steel-tube frame carries the loads, with aluminium (and some fibreglass) skins over it. The FAA's type certificate data sheet is the authority for any one model.
What the FAA has certified, ordered and been told about the Hiller OH-23 the component layer
A welded steel-tube frame carries the loads, with aluminium (and some fibreglass) skins over it. No FAA order in the current files names this model. Operators and repair shops have filed 1 failure report with the FAA since 1996, 1 of them in the last ten years: about 6.7 a year for every 100 aircraft on the register; the system most often named is landing gear.
Failure reports 1 since 1996 · what operators and shops told the FAA
Failure reports by year, as a table
| reports | |
|---|---|
| 96 | 1 |
By system
Failure reports by system, as a table
| reports | share | |
|---|---|---|
| Landing gear | 1 | 100% |
Parts most often reported as the reports name them
Latest reports
Approved replacement parts 1 parts manufacturer approvals
Parts a company other than the maker may make for this design and sell as FAA-approved. The companies holding the most:
Most often: fork (1).
Sources: the FAA's type certificate data sheets, airworthiness directives, supplemental type certificates, special conditions and special airworthiness information bulletins (Dynamic Regulatory System), and the FAA's service difficulty reports. A failure report is what an operator or repair station chose to file; the counts show reporting as much as reliability, and larger and commercial fleets report more. How the systems are grouped.
Connections how the OH-23 links to the rest of the register
- Hiller 242 aircraft on the register
- Hiller OH-23B 6 registered
- Hiller OH-23G 4 registered
- Hiller OH-23C 3 registered
- Hiller OH-23D 2 registered
- Type certificate 6H2 · held by Siam Hiller Holdings INC
- Type certificate 4H11 · held by Siam Hiller Holdings INC
- Type certificate 4H10 · held by Siam Hiller Holdings INC
- Built of steel tube and aluminium
- Franklin 6V-335 series 2 of these aircraft · 200 hp
- Franklin 6VS-335 series 1 of these aircraft · 240 hp
- Franklin 6V4 series 1 of these aircraft · 210 hp
- Allison (Rolls-Royce) 250 series 1 of these aircraft · 250 hp
- Texas 4 of these aircraft
- New Jersey 2 of these aircraft
- Washington 1 of these aircraft
- Virginia 1 of these aircraft
- Tennessee 1 of these aircraft
- Fort Wolters Helicopter INC 2 of these aircraft
- Summit Sales & Leasing INC 1 of these aircraft
- Alaska Army Aviation Museum INC 1 of these aircraft
- NTSB accidents and incidents involving the OH-23 4 cases since 1982 · 0 fatal
- Failure reports filed on the OH-23 1 reports since 1995
The whole map of how records connect · these connections as data: /graph/model/hiller/oh-23.json.
Aircraft newest certificates first · 15
| Tail no. | Maker and model | Owner and base | Certificate | Registered | Status |
|---|---|---|---|---|---|
| N96112 | Hiller OH-23D |
Summit Sales & Leasing INC Salem, Virginia |
Standard | 2023-08-07 | ValidFAA registration status code V: Valid registration. All codes |
| N68364 | Hiller OH-23B |
Co-owned owner Tennessee |
None on file | 2023-06-12 | ValidFAA registration status code V: Valid registration. All codes |
| N234SM | Hiller OH-23C |
Individual owner New Jersey |
Standard | 2023-02-02 | ValidFAA registration status code V: Valid registration. All codes |
| N6055 | Hiller OH-23B |
Individual owner Alabama |
None on file | 2022-10-28 | ValidFAA registration status code V: Valid registration. All codes |
| N252LG | Hiller OH-23C |
Alaska Army Aviation Museum INC Big Lake, Alaska |
Standard | 2021-05-25 | ValidFAA registration status code V: Valid registration. All codes |
| N6057 | Hiller OH-23B |
Individual owner Texas |
None on file | 2020-09-28 | ValidFAA registration status code V: Valid registration. All codes |
| N17129 | Hiller OH-23B |
Individual owner Ohio |
Standard | 2014-05-08 | ValidFAA registration status code V: Valid registration. All codes |
| N64881 | Hiller OH-23G |
Fort Wolters Helicopter INC Mineral Wells, Texas |
None on file | 2011-11-10 | ValidFAA registration status code V: Valid registration. All codes |
| N57893 | Hiller OH-23B |
Individual owner Nevada |
Standard | 2011-08-16 | ValidFAA registration status code V: Valid registration. All codes |
| N62409 | Hiller OH-23G |
Individual owner Kansas |
Multiple | 2010-06-02 | ValidFAA registration status code V: Valid registration. All codes |
| N67699 | Hiller OH-23B |
Individual owner New Jersey |
Standard | 2007-07-10 | ValidFAA registration status code V: Valid registration. All codes |
| N2RU | Hiller OH-23G |
Individual owner Texas |
Standard | 2005-03-11 | ValidFAA registration status code V: Valid registration. All codes |
| N92672 | Hiller OH-23C |
Individual owner Washington |
Standard | 2004-02-17 | ValidFAA registration status code V: Valid registration. All codes |
| N606CD | Hiller OH-23D |
Fort Wolters Helicopter INC Mineral Wells, Texas |
None on file | 1998-09-09 | ValidFAA registration status code V: Valid registration. All codes |
| N99579 | Hiller OH-23G |
Individual owner Montana |
None on file | Sale reportedFAA registration status code 17: Sale reported, pending cancellation. All codes |