# NTSB ANC90LA090: Cessna 206U, N9735Z, Taku, AK, June 17, 1990

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 17, 1990, 10:30 local (18:30 UTC)
- Place: Taku, AK
- Coordinates: 58.579387, -134.769226 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=58.5794&lon=-134.7692&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 10 uninjured
- Status: Completed, report August 28, 1992
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 5381
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC90LA090
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5381/pdf
- Page: https://openairdocs.org/ntsb/ANC90LA090

## Probable cause (aircraft 2)

FAILURE OF THE PILOT OF N9735Z (C-206U) TO SEE AND AVOID N756EJ (C-206G), AND FAILURE OF COMPANY MANAGEMENT TO ESTABLISH ADEQUATE SEPARATION PROCEDURES.

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Midair collision, cruise - normal
  - visual lookout - inadequate, pilot in command (cause)
  - visual separation - inadequate, company/operator management (cause)
- Midair collision, cruise - normal
  - visual lookout - inadequate, pilot of other aircraft (cause)
  - visual separation - inadequate, company/operator management (cause)

## Analysis (aircraft 2)

THE TWO AIRCRAFT FROM THE SAME OPERATOR WERE CONDUCTING GLACIER SIGHTSEEING OPERATIONS WHEN THE MIDAIR COLLISION OCCURRED. BOTH AIRCRAFT HAD BEEN IN FREQUENT RADIO AND VISUAL CONTACT WITH EACH OTHER. AFTER N9735Z (C-206U) EXITED SOCKEYE VALLEY, BOTH AIRCRAFT PROCEEDED TO WEST TWIN GLACIER AT SAME ALTITUDE AND HEADING. N9735Z (C-206U) STRUCK N756EJ (C-206G) FROM BEHIND. BOTH AIRCRAFT LANDED SAFELY.

## Aircraft 1

- Registration: [N9735Z](https://openairdocs.org/deregistered/N9735Z-2011-01-26), registration cancelled 2011-01-26, S/N U20606632, built 1982 (OpenAirDocs)
- Reported make and model: CESSNA 206U
- Registry model: [Cessna U206G](https://openairdocs.org/model/cessna-u206g) (registry code 2073356) (OpenAirDocs)
- Registry engine: [Continental IO-520-F](https://openairdocs.org/engine/continental-io-520-f) (registry code 17237, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: U20606632
- Airframe hours: 3645
- Engines: CONTINENTAL IO-520-F13 300 horsepower reciprocating
- Damage: Minor damage
- Flight: Part 135
- Registered owner: Taku Glacier Air, Inc
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, June 14, 1990, 10 hours before
- Departed: JNU, JUNEAU, AK
- Flight plan: Company VFR

## Aircraft 2

- Registration: [N756EJ](https://openairdocs.org/aircraft/N756EJ), registered now, S/N U20604029 (OpenAirDocs)
- Reported make and model: CESSNA 206G
- Registry model: [Cessna U206G](https://openairdocs.org/model/cessna-u206g) (registry code 2073356) (OpenAirDocs)
- Registry engine: [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series) (registry code 17032, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: U20604029
- Airframe hours: 4175
- Engines: CONTINENTAL IO-520-F9 300 horsepower reciprocating
- Damage: Substantial damage
- Flight: Part 135
- Registered owner: Taku Glacier Air, Inc
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, June 12, 1990, 18 hours before
- Departed: JNU, JUNEAU, AK
- Flight plan: Company VFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot, aircraft N9735Z; age 41; flight instructor, commercial; airplane ratings: single-engine sea, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: left; flight hours: 6,000 total, 140 in this make and model, 5,000 as pilot in command, 220 in the last 90 days, 100 in the last 30 days, 5 in the last 24 hours
- Pilot, aircraft N756EJ; age 46; airline transport, flight instructor; airplane ratings: single-engine land, single-engine sea, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: left; flight hours: 8,500 total, 500 in this make and model, 7,700 as pilot in command, 150 in the last 90 days, 100 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 220° at 15 knots
- Visibility: 30 statute miles
- Lowest ceiling: 4,000 ft overcast
- Temperature: 50 °F, dew point 37 °F
- Altimeter: 30.00 inHg

## FAA reports on this event (2)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19900617020471A](https://openairdocs.org/incident/19900617020471A), Jun 17, 1990: Cessna U206G, Taku, AK, Minor damage. During cruise left float struck tail of company N756EJ had other 206 in sight prior but lost track. Both landed.
- [Accident 19900617020472A](https://openairdocs.org/incident/19900617020472A), Jun 17, 1990: Cessna U206G, Taku, AK, Substantial damage. During cruise was over taken by company N9735Z and struck in tail by others float. Both landed safely.

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.

---
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.