FTW84LA373 · Cessna 172M
Cessna 172M and Thunderbird Park de Havilland DHC-1B-2-S5 DHC-1B-2-S · Accident: on ground/water collision with object while taxiing
Event
- NTSB case
- FTW84LA373
- Event typeAccident: someone killed or seriously injured, or the aircraft substantially damaged (NTSB definition). Incident: an occurrence that affected or could have affected safety, short of that. Glossary
- Accident
- InvestigationHow far the investigation had got when the record was published: preliminary, ongoing, final or completed. Unknown where the source does not say. Glossary
- Completed
- API-reported fatalities
- 0 · all aircraft and ground
- Ground fatalities
- 0
- OperationWhat kind of flying it was, grouped by the rules it flew under: airline (US Part 121), air taxi and commuter (Part 135), general aviation (Part 91 and similar), military or government. Glossary
- General aviation
- WeatherVisual meteorological conditions (VMC): good enough to fly by looking outside. Instrument conditions (IMC): cloud or low visibility, flying by instruments. Glossary
- Visual Meteorological Cond
Aircraft 1 · Cessna 172M
- Aircraft type
- Cessna 172
- Category
- Airplane
- RegistrationThe aircraft's tail number, such as N12345 or G-ABCD. Registrations are reissued, so the same one years apart can be a different aircraft. Glossary
- N9646H
- Operator
- Ollis B Harrison · private individual
- Onboard fatalities
- Unknown
- Route
- From not recordedTo not recorded
- Aircraft age
- Not recorded
- Flight rulesThe regulations the flight operated under: in the US, Part 91 (general aviation), Part 121 (airlines), Part 135 (air taxi and commuter) and others; for flights abroad, the NTSB's coarser commercial or non-commercial code. Glossary
- Part 91: General Aviation
- Phase of flightThe stage of the flight when things started to go wrong: standing, taxi, takeoff, initial climb, en route, maneuvering, approach or landing. Glossary
- Taxi · to runway
- First occurrenceThe single coded event the NTSB judges best describes what happened (records from 2008 on). Older records name the first occurrence in the sequence instead. Glossary
- On ground/water collision with object
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- Substantial
Aircraft 2 · de Havilland DHC-1B-2-S5 DHC-1B-2-S
- Aircraft type
- de Havilland DHC-1
- Category
- Airplane
- RegistrationThe aircraft's tail number, such as N12345 or G-ABCD. Registrations are reissued, so the same one years apart can be a different aircraft. Glossary
- N1PN
- Operator
- Thunderbird Park
- Onboard fatalities
- Unknown
- Route
- From not recordedTo not recorded
- Aircraft age
- Not recorded
- Flight rulesThe regulations the flight operated under: in the US, Part 91 (general aviation), Part 121 (airlines), Part 135 (air taxi and commuter) and others; for flights abroad, the NTSB's coarser commercial or non-commercial code. Glossary
- Part 91: General Aviation
- Phase of flightThe stage of the flight when things started to go wrong: standing, taxi, takeoff, initial climb, en route, maneuvering, approach or landing. Glossary
- Taxi · to runway
- First occurrenceThe single coded event the NTSB judges best describes what happened (records from 2008 on). Older records name the first occurrence in the sequence instead. Glossary
- On ground/water collision with object
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- Minor
Cause areas
- Pilot in command › Visual lookout, inadequate
- Pilot of other aircraft › Visual lookout, inadequate
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
ACCORDING TO THE PLT OF N9646H, WHILE HE WAS TAXIING UNDER THE DIRECTION OF GROUND CONTROL THE ACFT WAS STRUCK FROM BEHIND BY N1PN. THE PLT OF N1PN STATED THAT HE WAS CLEARED TO TAXI AND DID NOT SEE ANY OTHER ACFT AS HE ENTERED THE TAXIWAY. SEATED IN THE REAR SEAT OF THE TANDEM SEAT ACFT THE PLT OF N1PN WAS PERFORMING 'S' TURNS IN AN EFFORT TO MAINTAIN VISUAL CLEARANCE WHEN THE WING OF N9646H WAS SEEN ALMOST SIMULTANEOUS WITH THE COLLISION. INITIAL CONTACT OCCURRED BETWEEN THE PROP OF THE OVERTAKING ACFT AND THE EMPENNAGE OF THE LEADING ACFT.
Verbatim NTSB analysis from the NTSB dataset
Sources
NTSB record FTW84LA373
- Event ID
- 20001214X40737
- Case number
- FTW84LA373
- Dataset
- historical-pre2008
- Source SHA-256
- 89e2df6d848e7ab3b42e7d7c7a03ff403303057a26ca04c95b3ea67201c3ce74
Source notes (4)
- Unreviewed is an editorial label, not an investigation status. API-sourced is not report-checked or human-reviewed. Explicit event totals are used without summing aircraft injury tables; onboard allocation is withheld. Unknown values remain unknown. The operation category is mapped from the NTSB-reported FAR part and has not been reviewed.
- Filled from the NTSB case API where the bulk record had no value: investigation status. Values present in the bulk record are kept.
- The date is the local date, which is the same as the UTC date the NTSB stores.
- API snapshot SHA-256: 5ec7da7ae6b028c39823d1b608bf2a7421ad74f0cd8a15e3de152222c1bfd115; retrieved 2026-09-23T19:32:49.582Z.