# Hiller OH-23G - Type: Aircraft model (FAA registry) - Registry code: 4360121 - Manufacturer (registry): HILLER - Model: OH-23G - Aircraft type: Rotorcraft - Category: Rotorcraft - Engines: 1 · Reciprocating - Seats: 4 - Weight class: Up to 12,499 lb - Cruise speed: 79 mph - Certification: Type certificated - Data sheet: [TCDS 4H11](https://openairdocs.org/tcds/4H11) (OpenAirDocs) - Holder: Siam Hiller Holdings Inc. - Registered aircraft: 4 - Page: https://openairdocs.org/model/hiller-oh-23g Model codes come from the FAA registry's reference file. ADs are matched to them by model name and maker. ## ADs that may apply (OpenAirDocs) Matched to this model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment. None matched. ## Registered aircraft (4) - [N2RU](https://openairdocs.org/aircraft/N2RU): [Upham Chester R III](https://openairdocs.org/faa-owner/UPHAM%20CHESTER%20R%20III), [Mineral Wells, TX](https://openairdocs.org/faa-place/TX/Mineral%20Wells), built 1964, S/N 64-15110 - [N62409](https://openairdocs.org/aircraft/N62409): [Costa James J](https://openairdocs.org/faa-owner/COSTA%20JAMES%20J), [Goff, KS](https://openairdocs.org/faa-place/KS/Goff), built 1962, S/N 1455 - [N64881](https://openairdocs.org/aircraft/N64881): [Fort Wolters Helicopter Inc](https://openairdocs.org/faa-owner/FORT%20WOLTERS%20HELICOPTER%20INC), [Mineral Wells, TX](https://openairdocs.org/faa-place/TX/Mineral%20Wells), built 1963, S/N 1485 - [N99579](https://openairdocs.org/aircraft/N99579): [Geyser, MT](https://openairdocs.org/faa-place/MT/Geyser), S/N 64-15224, Sale reported, pending cancellation ## NTSB investigations (8) From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [NTSB ANC94LA045](https://openairdocs.org/ntsb/ANC94LA045), Apr 9, 1994: Hiller UH12E (N87594), Valdez, AK, substantial damage. Probable cause: THE INADVERTENT CLOSURE OF THE FUEL SUPPLY SHUTOFF VALVE. - [NTSB LAX87DVA04](https://openairdocs.org/ntsb/LAX87DVA04), Mar 8, 1987: Hiller OH-23G (N99232), Delano, CA, substantial damage - [NTSB SEA83LA059](https://openairdocs.org/ntsb/SEA83LA059), Feb 25, 1983: Hiller UH-12D (N62398), Near Oakridge, OR, substantial damage - [NTSB LAX81DVD28](https://openairdocs.org/ntsb/LAX81DVD28), May 30, 1981: Hiller Acft UH-12E (N62409), Orleans, CA, substantial damage - [NTSB SEA81FYM25](https://openairdocs.org/ntsb/SEA81FYM25), May 29, 1981: Hiller Acft UH-12E (N99575), Milton-Freewtr, OR, substantial damage - [NTSB SEA78DYP44](https://openairdocs.org/ntsb/SEA78DYP44), Jul 21, 1978: Hiller Acft UH-12E (N99575), Mesa, WA, substantial damage - [NTSB LAX77DVA35](https://openairdocs.org/ntsb/LAX77DVA35), Jun 1, 1977: Hiller Acft UH-12E (N99242), Bakersfield, CA, destroyed - [NTSB SEA76DYG67](https://openairdocs.org/ntsb/SEA76DYG67), Sep 27, 1976: Hiller Acft UH-12E (N62409), Clark Fork, ID, substantial damage ## FAA accident and incident reports (12) From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [Accident 20110623012719A](https://openairdocs.org/incident/20110623012719A), Jun 23, 2011: Hiller UH-12E (N99579), Hanford, CA, Substantial damage. At 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… - [Accident 19940409000049A](https://openairdocs.org/incident/19940409000049A), Apr 9, 1994: Hiller UH12E (N87594), Valdez, AK, Substantial damage. Lost power circling on photo flight. Fell 40FT to a ridge. Found fuel selector between detentes,near passenger foot - [Incident 19870424022859I](https://openairdocs.org/incident/19870424022859I), Apr 24, 1987: Hiller OH23G (N87594), Nome, AK, Minor damage. The helicopter skids broke through snow crust during landing, damaging tail rotor. - [Accident 19870308005529A](https://openairdocs.org/incident/19870308005529A), Mar 8, 1987: Hiller OH23G (N99232), Delano, CA, Substantial damage. Overloaded with chemicals. Unable to climb. Attempted to return to platform. Overshot. Collided with a tree. - [Accident 19830419015499A](https://openairdocs.org/incident/19830419015499A), Apr 19, 1983: Hiller OH23G (N62409), Nordman, ID, Destroyed. Made a run on landing on a snow-packed road. Skids broke through the hard packed snow. Tipped forward and broke up. - [Accident 19830225005819A](https://openairdocs.org/incident/19830225005819A), Feb 25, 1983: Hiller UH12D (N62398), Oakridge, OR, Substantial damage. Put sling load bucket on ground then attempted transition from hover to climb. Helicopter settled to ground impact. - [Accident 19810530030569A](https://openairdocs.org/incident/19810530030569A), May 30, 1981: Hiller UH12E (N62409), Orleans, CA, Substantial damage. Allowed tail rotor strike on practice autorotaion landing. - [Accident 19810529035939A](https://openairdocs.org/incident/19810529035939A), May 29, 1981: Hiller UH12E (N99575), Milton-Freewate, OR, Substantial damage. Helicopter crashed during attempted emergency landing after engine failure. - [Incident 19790519027369I](https://openairdocs.org/incident/19790519027369I), May 19, 1979: Hiller UH12E (N99232), Orange Cove, CA, Minor damage. Helicopter rotor blades struck standpipe after landing. - [Accident 19780721031029A](https://openairdocs.org/incident/19780721031029A), Jul 21, 1978: Hiller OH23G (N99575), Mesa, WA, Substantial damage. Dirt in refueling tanks. T/r severed tail boom. - [Accident 19770601012699A](https://openairdocs.org/incident/19770601012699A), Jun 1, 1977: Hiller OH23G (N99242), Bakersfield, CA, Destroyed. Dispensing squirrel bait,eng quit. Emerg autorotation attempted to steep slope,helo rolled over - [Accident 19760927030189A](https://openairdocs.org/incident/19760927030189A), Sep 27, 1976: Hiller OH23G (N62409), Clark Fork, ID, Substantial damage. Practice autorotation. ## Service difficulty reports (1) As reported by operators and repair stations, by the model named in the report. - [SDR 96ZZZX2277](https://openairdocs.org/sdr/96ZZZX2277), Mar 25, 1996: SKID TUBE. CORRODED. INSPECTION FOUND 2 EACH SKID TUBES CORRODED THROUGH BETWEEN SKID SHOE AND TUBE. SUSPECT DUE TO TRAPPED SPRAY CHEMICALS AND WATER FROM WASHING THE AIRCRAFT. ## The same model under other registry codes Amateur-built copies and renamed makers get their own codes. - [Hiller-Roberts OH23G](https://openairdocs.org/model/hiller-roberts-oh23g): 0 registered aircraft, registry code 4362305 - [Rogerson Hiller OH-23G](https://openairdocs.org/model/rogerson-hiller-oh-23g): 0 registered aircraft, registry code 4366005 --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.