# NTSB FTW86LRD12: Grumman G-164A, N5407, Branch, LA, May 21, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Final report
- Date: May 21, 1986, 14:00 local (19:00 UTC)
- Place: Branch, LA
- Coordinates: 30.339826, -92.259948 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=30.3398&lon=-92.2599&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): 22136
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW86LRD12
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/22136/pdf
- Page: https://openairdocs.org/ntsb/FTW86LRD12

## 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, maneuvering
  - eng assembly,blower/impeller/integral supercharger - failure,total (cause)
- Forced landing, descent - emergency
- Nose over, landing - roll
  - terrain condition - soft (contributing factor)

## Analysis

SHORTLY AFTER TAKEOFF, A PARTIAL POWER LOSS OCCURRED & THE PLT MADE A FORCED LANDING IN A SOFT PLOWED FIELD, WHERE THE ACFT NOSED OVER ONTO ITS BACK. THE PLT RPRTD THE LOSS OF POWER WAS DUE TO FAILURE OF THE ENG BLOWER.

## Aircraft

- Registration: [N5407](https://openairdocs.org/deregistered/N5407-2013-04-09), registration cancelled 2013-04-09, S/N 1020, built 1972 (OpenAirDocs)
- Reported make and model: GRUMMAN G-164A
- Registry model: [Grumman G-164A](https://openairdocs.org/model/grumman-g-164a) (registry code 3952704) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R-985 series](https://openairdocs.org/engine/pratt-whitney-r-985-series) (registry code 52008, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 1020
- Airframe hours: 3510
- Engines: P&W R-985 450 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Operator: Rufus G. Fruge
- Registered owner: Darrel Thibodeaux
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, April 27, 1986, 80 hours before
- Departed: BRANCH, LA

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 44; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; seat: front; flight hours: 14,891 total, 12,806 in this make and model, 6 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Visibility: 6 statute miles
- Temperature: 81 °F, dew point 55 °F
- Altimeter: 30.00 inHg

## 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 19860521019099A](https://openairdocs.org/incident/19860521019099A), May 21, 1986: Scwzer G164A, Branch, LA, Substantial damage. Engine lost power. Pilot forced to land in a soft dirt field. Aircraft overturned. Engine supercharger failed.

## Other investigations on N5407 (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 FTW84LA132](https://openairdocs.org/ntsb/FTW84LA132), Feb 10, 1984: Grumman G-164A (N5407), Heidenheimer, TX, 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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