Hiller OH-23G

Aircraft model · Rotorcraft · Rotorcraft · registry code 4360121

Manufacturer (registry)
HILLER
Model
OH-23G
Registry code
4360121
Registered
4 aircraft
Type
Rotorcraft
Engines
1 · Reciprocating
Seats
4
Weight class
Up to 12,499 lb
Cruise speed
79 mph
Certification
Type certificated
Data sheet
TCDS4H11
Holder
Siam Hiller Holdings Inc.

Model codes come from the FAA registry’s reference file. ADs are matched to them by model name and maker.

On this page

Aircraft by year built · 24

1957Registered nowDeregistered2026
Aircraft by the year they were built: 24 aircraft
19571
19611
19621
19638
19649
19651
19741
19761
19771

Airworthiness directives that may apply · 0

ADs whose products match this airframe model. Each AD’s applicability may narrow it by serial number, part number or configuration.

No ADs matched this model

Registered aircraft · 4

Query with SQL
duckdb -csv -c "SELECT n_number, serial_number, year_manufactured, status, registrant_name, registrant_city, registrant_state
  FROM 'https://openairdocs.org/data/latest/faa_aircraft_registration.parquet'
  WHERE aircraft_model_code IN ('4360121')
  ORDER BY n_number"

Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.

NTSB investigations · 8

Aircraft matched to this model through the registry, by N-number and event date, checked against the reported serial number, make and model.

First occurrence, 1982 to 2007

Of 3 cases with NTSB’s older coding, defined in its coding manual.

NTSB ANC94LA045Accident · No injuriesLimited investigationFinal reportHiller UH12E · Valdez, AKThe inadvertent closure of the fuel supply shutoff valve.Apr 9, 1994 · N87594 · Substantial damageNTSB LAX87DVA04Accident · No injuriesFinal reportHiller OH-23G · Delano, CADuring an aerial application flight, the pilot returned to the loading truck for approximately 5 additional gallons of chemical to finish the application. The loader; however, loaded 70 gallons and when the pilot took off the rotor RPM began to bleed off. The…Mar 8, 1987 · N99232 · Substantial damageNTSB SEA83LA059Accident · No injuriesLimited investigationFinal reportHiller UH-12D · Near Oakridge, ORAccording to the pilot, a 250 lb load on a 30 ft external line had been set down at a site at an elevation of about 3500 ft MSL. After the load was released, the pilot attempted to transition from a hover to a climb, but the helicopter began to settle.…Feb 25, 1983 · N62398 · Substantial damageNTSB LAX81DVD28Accident · No injuriesClosedHiller Acft UH-12E · Orleans, CAMay 30, 1981 · N62409 · Substantial damageNTSB SEA81FYM25Accident · No injuriesClosedHiller Acft UH-12E · Milton-Freewtr, ORMay 29, 1981 · N99575 · Substantial damageNTSB SEA78DYP44Accident · No injuriesClosedHiller Acft UH-12E · Mesa, WAJul 21, 1978 · N99575 · Substantial damageNTSB LAX77DVA35Accident · No injuriesClosedHiller Acft UH-12E · Bakersfield, CAJun 1, 1977 · N99242 · DestroyedNTSB SEA76DYG67Accident · No injuriesClosedHiller Acft UH-12E · Clark Fork, IDSep 27, 1976 · N62409 · Substantial damage
Query with SQL
duckdb -csv -c "SELECT c.\"ntsbNumber\", c.\"eventDate\", c.\"eventType\", c.\"eventCity\", c.\"eventStateOrRegion\", a.n_number, a.\"aircraftMake\", a.\"aircraftModel\", c.\"highestInjuryLevel\", c.\"totalFatal\", c.\"completionStatus\", c.report_url
  FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a JOIN 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c ON c.\"mKey\" = a.case_mkey
  WHERE a.aircraft_model_code IN ('4360121')
  ORDER BY c.\"eventDate\" DESC, c.\"ntsbNumber\" DESC"

Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.

FAA incident reports · 12

Matched to this model through the registry, by N-number and event date, checked against the reported make and model.

Accident 20110623012719AHiller UH-12E · Hanford, CAAt 0430 the aircraft was being service and refueling when the pilot noticed excess play and oil leaking from the tail rotor drive coupling while the aircraft was at idle. As the pilot moved the aicraft from the service truck to the ground for further…Jun 23, 2011 · N99579 · Substantial damageAccident 19940409000049AHiller UH12E · Valdez, AKLost power circling on photo flight. Fell 40FT to a ridge. Found fuel selector between detentes,near passenger footApr 9, 1994 · N87594 · Substantial damageIncident 19870424022859IHiller OH23G · Nome, AKThe helicopter skids broke through snow crust during landing, damaging tail rotor.Apr 24, 1987 · N87594 · Minor damageAccident 19870308005529AHiller OH23G · Delano, CAOverloaded with chemicals. Unable to climb. Attempted to return to platform. Overshot. Collided with a tree.Mar 8, 1987 · N99232 · Substantial damageAccident 19830419015499AHiller OH23G · Nordman, IDMade a run on landing on a snow-packed road. Skids broke through the hard packed snow. Tipped forward and broke up.Apr 19, 1983 · N62409 · DestroyedAccident 19830225005819AHiller UH12D · Oakridge, ORPut sling load bucket on ground then attempted transition from hover to climb. Helicopter settled to ground impact.Feb 25, 1983 · N62398 · Substantial damageAccident 19810530030569AHiller UH12E · Orleans, CAAllowed tail rotor strike on practice autorotaion landing.May 30, 1981 · N62409 · Substantial damageAccident 19810529035939AHiller UH12E · Milton-Freewate, ORHelicopter crashed during attempted emergency landing after engine failure.May 29, 1981 · N99575 · Substantial damageIncident 19790519027369IHiller UH12E · Orange Cove, CAHelicopter rotor blades struck standpipe after landing.May 19, 1979 · N99232 · Minor damageAccident 19780721031029AHiller OH23G · Mesa, WADirt in refueling tanks. T/r severed tail boom.Jul 21, 1978 · N99575 · Substantial damageAccident 19770601012699AHiller OH23G · Bakersfield, CADispensing squirrel bait,eng quit. Emerg autorotation attempted to steep slope,helo rolled overJun 1, 1977 · N99242 · DestroyedAccident 19760927030189AHiller OH23G · Clark Fork, IDPractice autorotation.Sep 27, 1976 · N62409 · Substantial damage
Query with SQL
duckdb -csv -c "SELECT report_number, event_date, event_type, city, state, aircraft_make, aircraft_model, aircraft_damage, fatal_injuries, n_number
  FROM 'https://openairdocs.org/data/latest/faa_incident_report.parquet'
  WHERE aircraft_model_code IN ('4360121')
  ORDER BY event_date DESC, report_number DESC"

Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.

Service difficulty reports · 1

Query with SQL
duckdb -csv -c "SELECT sdr_id, difficulty_date, n_number, aircraft_make, aircraft_model, part_name, part_condition, jasc_code, discrepancy
  FROM 'https://openairdocs.org/data/latest/faa_service_difficulty_report.parquet'
  WHERE aircraft_model_key = 'OH23G'
  ORDER BY difficulty_date DESC"

Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.

The same model under other registry codes

Amateur-built copies and renamed makers get their own codes.

Query with SQL
duckdb -csv -c "SELECT m.code, m.manufacturer, m.model, count(g.n_number) AS aircraft
  FROM 'https://openairdocs.org/data/latest/faa_aircraft_model.parquet' m LEFT JOIN 'https://openairdocs.org/data/latest/faa_aircraft_registration.parquet' g ON g.aircraft_model_code = m.code
  WHERE m.match_key = 'OH23G' AND m.code NOT IN ('4360121')
  GROUP BY ALL
  ORDER BY aircraft DESC
  LIMIT 12"

Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.