# NTSB MIA84LA020: Schweizer G-164B, N8459K, Ormond Beach, FL, October 27, 1983

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: October 27, 1983, 12:50 local (16:50 UTC)
- Place: Ormond Beach, FL
- Location: 29.3011° N, 81.1138° W: Placed by OpenAirDocs at ORMOND BEACH MUNI (OMN), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=29.3011&lon=-81.1138&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 31055
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA84LA020
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/31055/pdf
- Page: https://openairdocs.org/ntsb/MIA84LA020

## Sequence of events

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

- Loss of engine power(partial) - mech failure/malf, takeoff - initial climb
  - fuel system,vent - blocked(partial) (cause)
- Forced landing, maneuvering - turn to landing area (emergency)
  - load jettison - performed, pilot in command
- Loss of control - in flight, maneuvering - turn to landing area (emergency)
  - stall - inadvertent, pilot in command
- In flight collision with terrain/water, maneuvering - turn to landing area (emergency)

## Analysis

THE ACFT IS A TWIN-ENGINE CONVERSION OF THE GRUMMAN G-164B. THE PLT WAS ON A LOCAL TEST FLT WITH THE HOPPER FILLED WITH WATER TO SIMULATE FLT CONDITIONS NEAR THE OPERATING GROSS WEIGHT OF THE ACFT. AFTER LIFT-OFF A PARTIAL POWER LOSS WAS EXPERIENCED ON THE #2 ENG. THE PLT EXECUTED A LEFT TURN & BEGAN DUMPING THE LOAD, AT WHICH TIME THE #1 ENG ALSO EXPERIENCE A POWER LOSS. THE ACFT STALLED, BUT THE PLT WAS ABLE TO REGAIN A LEVEL ATTITUDE BEFORE IMPACT. THE ACFT INCORPORATED A COMMON FUEL & FUEL VENT SYSTEM FOR BOTH ENGS, BUT EACH ENG HAD A FUEL SHUTOFF VALVE, FUEL FILTER & FUEL PUMP. EXAMINATION SHOWED A PARTIAL RESTRICTION IN THE FUEL VENT SYSTEM WHEN THE VENT LINE WAS DISCONNECTED. DUE TO IMPACT DAMAGE TO THE FUEL VENT SYSTEM, THE PRECISE NATURE OF THE RESTRICTION THAT WAS FOUND WHEN THE FUEL VENT LINE WAS DISCONNECTED COULD NOT BE DETERMINED. THE PLT LATER RECOMMENDED, HOWEVER, INSTALLATION OF AN AIR PRESSURE OPERATED VANE ON THE FUEL VENT OPENINGS.

## Aircraft

- Registration: [N8459K](https://openairdocs.org/deregistered/N8459K-2012-02-03), registration cancelled 2012-02-03, S/N 701B, built 1982 (OpenAirDocs)
- Reported make and model: Schweizer G-164B
- Registry model: [Schweizer G-164B](https://openairdocs.org/model/schweizer-g-164b) (registry code 8059055) (OpenAirDocs)
- Registry engine: [Lycoming TI0-540 series](https://openairdocs.org/engine/lycoming-ti0-540-series) (registry code 41533, turbo-prop) (OpenAirDocs)
- Category: Airplane
- Serial number: 701B
- Airframe hours: 103
- Engines: LYCOMING TIO-540 reciprocating
- Damage: Destroyed
- Flight: Part 91
- Registered owner: Twin Cat Corporation
- Airworthiness certificate: Special, Restricted (Special)
- Airport: OMN, Ormond Beach

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 52; commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: front; flight hours: 2,298 total, 15 in this make and model, 2,090 as pilot in command, 13 in the last 90 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 10° at 13 knots, gusting 20
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 72 °F, dew point 52 °F
- Altimeter: 30.00 inHg
- Observed at: DAB, 8 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 19831027056229A](https://openairdocs.org/incident/19831027056229A), Oct 27, 1983: Grumav STCG164, Ormond Beach, FL, Destroyed. Engine quit after takeoff. Aircraft stalled and fell 100 ft to the ground. Fuel vent line restriction a factor.

## Other investigations on N8459K (2)

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 DEN07CA112](https://openairdocs.org/ntsb/DEN07CA112), Jul 4, 2007: Grumman-Schweizer G-164B (N8459K), Joes, CO, substantial damage. Probable cause: the pilot's improper takeoff planning and subsequent failure to maintain aircraft control during the takeoff. Contributing factors were the high density altitude and tailwind.
- [NTSB DEN06CA105](https://openairdocs.org/ntsb/DEN06CA105), Jul 27, 2006: Schweizer G-164B (N8459K), Joes, CO, substantial damage. Probable cause: A loss of engine power due to the failure of the supercharger. Contributing to the accident was a lack of suitable terrain for a forced landing.

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.

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