FTW99LA258 · Cessna 172RG
Flight Works Cessna 172RG · Accident: main gear collapsed during landing
From Wiley Post Airport (PWA) to Bill & Hillary Clinton National Airport/Adams Field (LIT)
Event
- NTSB case
- FTW99LA258
- 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
Cessna 172RG
- 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
- N9724B
- Operator
- Flight Works
- Onboard fatalities
- Unknown
- Route
- From Wiley Post Airport (PWA), Oklahoma City, OKTo Bill & Hillary Clinton National Airport/Adams Field (LIT), Little Rock, AR
- 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
- Landing · flare/touchdown
- 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
- Main gear collapsed
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- Substantial
Cause areas
- Hydraulic system, motor › Failure
- Hydraulic system, pump › Failure
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
The airplane's right main landing gear collapsed upon landing. According to the pilot, he was flying on an IFR flight plan from Oklahoma City, Oklahoma, to Little Rock, Arkansas, when the 'oil pressure went beyond the green range.' He diverted to Fort Smith, Arkansas, and when he extended the landing gear, the 'indicator light did not come on.' He executed a low flyby over the airport to allow the controllers in the control tower to try to determine if the landing gear was extended. The tower controllers verified that the gear was extended, but could not determine if it was in the locked position. Upon landing, the right main landing gear collapsed. Examination of the airplane revealed that the electric pump motor/hydraulic power pack had failed. The electric pump motor/hydraulic power pack was replaced, and the gear system operated within manufacturer's specifications.
Probable cause
The failure of the electric pump motor/hydraulic power pack resulting in the collapse of the right main landing gear upon landing.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record FTW99LA258
- Event ID
- 20001212X19767
- Case number
- FTW99LA258
- 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: local date, investigation status. Values present in the bulk record are kept.
- The date is the local date; the NTSB stores the UTC date 1999-09-12.
- API snapshot SHA-256: 2514a5cd979f06a381e7ab923dc53f44c14fef5a60925fe7862e0a496874988c; retrieved 2026-09-22T14:09:56.867Z.