# NTSB ANC88LA086: Hughes 369D, N1089D, Kitoi Bay, AK, July 9, 1988

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 8, 1988, 20:35 local (Jul 9, 1988, 04:35 UTC)
- Place: Kitoi Bay, AK
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report June 9, 1989
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 5028
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC88LA086
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5028/pdf
- Page: https://openairdocs.org/ntsb/ANC88LA086

## Sequence of events

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

- Roll over, takeoff
  - lift-off - restricted (contributing factor)
  - preflight planning/preparation - poor, pilot in command (cause)
  - cyclic - improper use of, pilot in command (cause)
  - operation with known deficiencies in equipment - improper use of, pilot in command (cause)

## Analysis

THE HELICOPTER LANDED WITH THE LEFT SKID AGAINST A SURVEY STAKE WHICH PROTRUDED FROM THE GROUND ABOUT 6 INCHES. UPON LIFTOFF THE SKID DID NOT CLEAR THE METAL STAKE BEFORE THE HELICOPTER STARTED MOVING LATERALLY TO THE LEFT. THE LEFT SKID REMAINED AGAINST THE METAL STAKE AND THE HELICOPTER ROLLED OVER ON TO ITS LEFT SIDE. THE PILOT STATED LATER THAT THE LATERAL TRIM MOTOR HAD FAILED REQUIRING 35 POUNDS OF PRESSURE TO THE RIGHT AGAINST THE CYCLIC WHILE AT A HOVER.

## Aircraft

- Registration: [N1089D](https://openairdocs.org/deregistered/N1089D-2003-01-13), registration cancelled 2003-01-13, S/N 510966D, built 1981 (OpenAirDocs)
- Reported make and model: HUGHES 369D
- Registry model: [Hughes Helicopters HUGHES 369D](https://openairdocs.org/model/hughes-helicopters-hughes-369d) (registry code 4470706) (OpenAirDocs)
- Registry engine: [Allison 250 SER 250HP](https://openairdocs.org/engine/allison-250-ser-250hp) (registry code 03002, turbo-shaft) (OpenAirDocs)
- Category: Helicopter
- Serial number: 510966D
- Airframe hours: 3669
- Engines: ALLISON 250-C20B 420 horsepower turbo shaft
- Damage: Substantial damage
- Flight: Part 135
- Registered owner: Soloy Helicopters, Inc.
- Airworthiness certificate: Standard, Normal
- Last inspection: AAIP, July 7, 1988, 6 hours before
- Flight plan: Company VFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 35; airline transport, commercial; airplane ratings: single-engine land; instrument ratings: airplane, helicopter; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 4,218 total, 2,622 in this make and model, 3,531 as pilot in command, 223 in the last 90 days, 141 in the last 30 days, 6 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 130° at 6 knots
- Visibility: 15 statute miles
- Lowest ceiling: 10,000 ft overcast
- Temperature: 52 °F, dew point 48 °F
- Altimeter: 30.00 inHg
- Observed at: ODK, 32 nm away

## FAA reports on this event (1)

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

- [Accident 19880708025899A](https://openairdocs.org/incident/19880708025899A), Jul 8, 1988: Hughes 369D, Kitoi Bay, AK, Substantial damage. On takeoff a skid was caught by a metal stake causing dynamic roll over. Pilot failed to assure skids were cleared.

## Other investigations on N1089D (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 SEA87LA025](https://openairdocs.org/ntsb/SEA87LA025), Nov 14, 1986: Hughes 369D (N1089D), Winlock, WA, substantial damage

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.