# NTSB FTW82FRD15: Grumman G-164A, N6787Q, Egan, LA, June 11, 1982

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Final report
- Date: June 11, 1982, 14:00 local (19:00 UTC)
- Place: Egan, LA
- Coordinates: 30.4899, -92.410469 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=30.4899&lon=-92.4105&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious
- Status: Completed, report June 11, 1983
- Report: Approved by Office Director
- NTSB case key (mKey): 70556
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW82FRD15
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/70556/pdf
- Page: https://openairdocs.org/ntsb/FTW82FRD15

## Sequence of events

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

- Loss of engine power(total) - mech failure/malf, takeoff - initial climb
  - engine assembly,crankshaft - worn (cause)
  - engine assembly,crankshaft - failure,partial (cause)
- Forced landing, landing - flare/touchdown
- Nose over, landing - flare/touchdown

## Analysis

AS THE PLT WAS ADJUSTING THE POWERPLANT & PROP CONTROLS THE ENG ACCELERATED, & AT THE SAME TIME OIL COVERED THE WINDSHIELD. THE ACFT WENT DOWN INTO A BEAN FIELD & FLIPPED OVER. DISASSEMBLY OF THE ENG REVEALED THE REAR COUNTERWEIGHT TRAILING PIN WORN & GAULDED. THE SLEEVES IN BOTH THE REAR CRANKSHAFT & COUNTERWEIGHT WERE WORN & GAULDED. THE REAR COUNTERWEIGHT LEADING PIN ALSO SHOWED SIGNS OF WEAR & GAULDING SPOTS. ALL PROP BOLTS FAILED IN THE AREA OF THE HEAD.

## Aircraft

- Registration: [N6787Q](https://openairdocs.org/deregistered/N6787Q-2013-09-16), registration cancelled 2013-09-16, S/N 1720, built 1977 (OpenAirDocs)
- Reported make and model: GRUMMAN G-164A
- Registry model: [Grumman Acft ENG Cor-Schweizer G-164A](https://openairdocs.org/model/grumman-acft-eng-cor-schweizer-g-164a) (registry code 3952801) (OpenAirDocs)
- Registry engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999) (OpenAirDocs)
- Category: Airplane
- Serial number: 1720
- Airframe hours: 2380
- Engines: PEZATEL P2L-3S 450 horsepower reciprocating
- Damage: Destroyed
- Fire: On-Ground
- Flight: Part 137
- Operator: Mowata Flying Service, Inc.
- Registered owner: Mowata Flying Service, Inc.
- Departed: EGAN, LA
- Destination: EGAN, LA

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 35; flight instructor, commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; flight hours: 6,121 total, 300 in this make and model, 6,000 as pilot in command, 300 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day

## Other investigations on N6787Q (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 FTW81DRD17](https://openairdocs.org/ntsb/FTW81DRD17), Apr 3, 1981: Grumman G-164A (N6787Q), Lake Charles, LA, 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.

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