# NTSB SEA84LA137: Grumman G-164B, N48681, Spokane, WA, June 19, 1984

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 19, 1984, 08:00 local (15:00 UTC)
- Place: Spokane, WA
- Coordinates: 47.630874, -117.549331 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=47.6309&lon=-117.5493&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 39939
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA84LA137
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/39939/pdf
- Page: https://openairdocs.org/ntsb/SEA84LA137

## Sequence of events

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

- Loss of engine power, maneuvering - aerial application
  - engine assembly,camshaft - failure,partial (cause)
- Forced landing, descent - emergency
- In flight collision with object, descent - emergency
  - object - wire,transmission (contributing factor)
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

THE ENG LOST POWER DURING AN AERIAL APPLICATION FLT, THEN AS THE PLT WAS MAKING A FORCED LANDING, THE ACFT STRUCK TELEPHONE WIRES. AFTER HITTING THE WIRES, THE ACFT STRUCK THE GROUND & CARTWHEELED. AN EXAM REVEALED THAT A FAILURE OF THE CAM RING SYSTEM HAD OCCURRED.

## Aircraft

- Registration: N48681 (not matched to a registry record)
- Reported make and model: GRUMMAN G-164B
- Category: Airplane
- Serial number: 1138
- Airframe hours: 2000
- Engines: P&W R-985-AN1 450 horsepower reciprocating
- Damage: Destroyed
- Flight: Aerial application, Part 137
- Registered owner: Delton E. Macy
- Airworthiness certificate: Special, Restricted (Special)
- Departed: NONE, SPOKANE, WA

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; commercial; airplane ratings: multi-engine land, single-engine land; medical: class 2, valid medical--no waivers/lim.; seat: center; flight hours: 8,813 total, 200 in the last 90 days, 6 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 130° at 5 knots
- Visibility: 20 statute miles
- Lowest ceiling: 25,000 ft overcast
- Temperature: 61 °F, dew point 46 °F
- Altimeter: 29.00 inHg
- Observed at: SFF, 7 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 19840619025449A](https://openairdocs.org/incident/19840619025449A), Jun 19, 1984: Scwzer G164B, Spokane, WA, Destroyed. Crash occurred during emergency landing after engine failure because of valve cam ring system breaking.

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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