# Accident 19991117040881A: Bell 206L3, Seattle, WA, November 17, 1999

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: November 17, 1999, 12:10 local time
- Place: Seattle, WA
- Damage: No damage
- Collision: Midair collision, first aircraft
- Operating rules: General operating rules (Part 91)
- Location: 47.6209° N, 122.3491° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=47.6209&lon=-122.3491&mi=10
- Aircraft: N206AC, registered now (https://openairdocs.org/aircraft/N206AC) (OpenAirDocs)
- Registry model: Bell 206B (registry code 1181511, https://openairdocs.org/model/bell-206b) (OpenAirDocs)
- Registry engine: Allison 250-C20 series (registry code 03020, https://openairdocs.org/engine/allison-250-c20-series) (OpenAirDocs)
- Reported make and model: BELL 206L3
- NTSB investigation: [NTSB SEA00FA021](https://openairdocs.org/ntsb/SEA00FA021) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19991117040881A

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

(-23) AIRCAFT DEPARTED BFI AT 1205 HEADED NORTH TO VANCOUVER, CANADA. THE PILOT HAD CLIMBED TO APPROX. 1000 FT MSL AND HAD AN INDICATED AIRSPEED OF 10 KTS. ALONG THE EAST SIDE OF LAKE UNION, JUST AS HE WAS GOING TO CALL SEATTLE RADIO TO OPEN HIS FLIGHT PLAN, HE HEARD A LOUND BANG AND FELT VIBRATIONS IN THE MAIN ROTOR SYSTEM. HE DID NOT KNOW HE HAD HIT ANOTHER AIRCRAFT.  HE TOOL PRECAUTIONARY ACTIONS, NOT KNOWING THE CAUSE OF THE VIBRATIONS, AND AFTER DETERMINING HE HAD CONTROL OF THE AIRCRAFT HE MADE  A PRECAUTIONARY LANDING AT THE MEDVAC HELIPAD AT THE UNIVERSITY OF WASHINGTON.  HE WAS NOTIFIED ON THE GROUND OF THE MID AIR WITH N5735A NO INJURIES AND DAMAGE WAS PRIMARILY TO THE LEADING EDGE AND TOP SURFACE OF ONE MAIN ROTOR BLADE APPROX. 1 FT FROM TIP BLADE.

## The NTSB's investigation of this event (1)

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 SEA00FA021](https://openairdocs.org/ntsb/SEA00FA021), Nov 17, 1999: Bell 206L-3 (N206AC), Seattle, WA, substantial damage. Probable cause: Adequate separation and lookout not maintained by the pilots of both aircraft.

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. For accidents, the NTSB's own investigation is the fuller record.

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