IAD99LA045 · Gulfstream American 690C
Gulfstream American 690C · Accident: hard landing
From Blue Grass Airport (LEX) to Ingalls Field (HSP)
Event
- NTSB case
- IAD99LA045
- 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
Gulfstream American 690C
- Aircraft type
- Gulfstream American 690
- 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
- N840V
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From Blue Grass Airport (LEX), Lexington, KYTo Ingalls Field (HSP)
- 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
- Hard landing
- 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
- Pilot in command › Compensation for wind conditions, inadequate
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
The airplane was landing in turbulent wind conditions, at a 3,792-foot elevation airport, with winds from 40 degrees to the right, at 26, gusting to 31 knots. The airplane touched down left of runway centerline, approximately 3,100 feet from the beginning of the 5,601-foot runway. The left main landing gear folded, and the airplane bounced. It then touched down on the right main landing gear, about 200 feet further down the runway. It then settled on the left propeller and fuselage about the 2,000 feet-remaining marker, and skidded an additional 1,100 feet. Post-flight examination revealed that the left main landing gear inboard retract cylinder clevis was fractured approximately 1 1/8 inches below the attaching bolt hole. Additionally, a crack at the center of the upper drag brace was found in the webbing where the landing gear door actuating mechanism attached. Laboratory examination of the fracture in the retract cylinder clevis revealed features typical of a bending overstress separation. Laboratory examination of the upper drag brace crack revealed small fatigue crack regions on both sides of a manufactured hole, with no evidence of preexisting mechanical damage, or other defects in the hole. Remaining portions of the crack in the upper drag brace were consistent with overstress.
Probable cause
A hard landing due to the pilot's inadequate compensation for the wind conditions.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record IAD99LA045
- Event ID
- 20001212X18793
- Case number
- IAD99LA045
- 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: a1ae6f7c13e56ad5d58e521e299520b5405e4fa472a3421e3c0181f8250f5fd5; retrieved 2026-09-22T15:05:36.362Z.