# NTSB FTW88DRD01: Grumman G-164A, N6743Q, Port Allen, LA, October 8, 1987

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Final report
- Date: October 8, 1987, 08:00 local (13:00 UTC)
- Place: Port Allen, LA
- Coordinates: 30.449222, -91.19931 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=30.4492&lon=-91.1993&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report May 16, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 22485
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW88DRD01
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/22485/pdf
- Page: https://openairdocs.org/ntsb/FTW88DRD01

## 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 - aerial application
  - engine assembly,cylinder - failure,total (cause)
- Forced landing, descent - emergency
- Nose over, landing - roll
  - terrain condition - none suitable (contributing factor)
  - terrain condition - high vegetation (contributing factor)

## Analysis

THE PILOT EXPERIENCED A PARTIAL LOSS OF POWER DURING PULL-UP FROM A SWATH RUN. HE ATTEMPTED TO RETURN TO THE FIELD HE WAS WORKING IN ORDER TO MAKE AN EMERGENCY LANDING BUT WAS UNABLE TO DUE TO INADEQUATE ENGINE POWER. HE LANDED IN HIGH VEGETATION AND FLIPPED INVERTED. EXAM OF THE ENGINE REVEALED THAT THE NO. 7 CYLINDER WAS CRACKED COMPLETELY AROUND THE BARREL.

## Aircraft

- Registration: [N6743Q](https://openairdocs.org/deregistered/N6743Q-2018-05-31), registration cancelled 2018-05-31, S/N 1715 (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)
- Category: Airplane
- Serial number: 1715
- Airframe hours: 4940
- Engines: P&W R-1340 600 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Operator: White Castle Fertilizer Coop
- Registered owner: White Castle Fertilizer Co-0p
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, January 5, 1987, 542 hours before
- Departed: WHITE CASTLE, LA

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 31; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; seat: center; flight hours: 6,300 total, 3,900 in this make and model, 6,200 as pilot in command, 90 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 61 °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 19871008059069A](https://openairdocs.org/incident/19871008059069A), Oct 8, 1987: Scwzer G164A, Port Allen, LA, Substantial damage. Power lost. Forced landing in a field. Aircraft came to rest inverted. Found cylinder fracture cause of power loss.

## Other investigations on N6743Q (3)

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 CEN14LA375](https://openairdocs.org/ntsb/CEN14LA375), Jul 18, 2014: Grumman Acft ENG Cor-Schweizer G 164A (N6743Q), Fairview, KS, substantial damage. Probable cause: The backfire of the engine and its loss of power for reasons that could not be determined based on the available evidence.
- [NTSB FTW83LA220](https://openairdocs.org/ntsb/FTW83LA220), May 11, 1983: Grumman G-164A (N6743Q), Bastrop, LA, substantial damage
- [NTSB FTW81DRJ18](https://openairdocs.org/ntsb/FTW81DRJ18), Jun 8, 1981: Grumman G-164A (N6743Q), Bonita, 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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