# NTSB MKC86LA134: Grumman G-164B, N48532, Wellman, IA, June 26, 1986

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: June 26, 1986, 09:45 local (14:45 UTC)
- Place: Wellman, IA
- Coordinates: 41.460643, -91.830268 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=41.4606&lon=-91.8303&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 34199
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC86LA134
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/34199/pdf
- Page: https://openairdocs.org/ntsb/MKC86LA134

## Sequence of events

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

- In flight collision with object, maneuvering - aerial application
  - object - wire,transmission (contributing factor)
  - proper altitude - not maintained, pilot in command (cause)
- In flight collision with terrain/water, maneuvering - aerial application
  - terrain condition - ground

## Analysis

THE PIC STATED THAT DURING THE LAST 3RD OF HIS PROCEDURE TURNAROUND THE ACFT DESCENDED TO JUST BELOW THE POWERLINES AT THE EDGE OF THE FIELD HE WAS SPRAYING. THE ACFT STRUCK THE POWERLINES WITH THE MAIN LANDING GEAR WHICH NOSED THE ACFT OVER. FULL POWER WAS ADDED JUST BEFORE THE ACFT HIT THE POWERLINES. THE PIC STATED HE WAS UNABLE TO RECOVER TO LEVEL FLT BEFORE IMPACTING THE GROUND. THE PIC STATED THAT THIS TURN WAS MADE DOWNWIND AND THAT IT WAS SHORTER THAN HE LIKED SO AS TO AVOID OVERFLYING HOUSES NEAR THE FIELD.

## Aircraft

- Registration: N48532 (not matched to a registry record)
- Reported make and model: GRUMMAN G-164B
- Category: Airplane
- Serial number: 62B
- Airframe hours: 1874
- Engines: P&W R-985 600 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Registered owner: Thompson Aero Service Inc.
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, May 1, 1986, 26 hours before
- Departed: WELLMAN, IA

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 28; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; flight hours: 851 total, 168 in this make and model, 851 as pilot in command, 28 in the last 90 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 220° at 12 knots, gusting 17
- Visibility: 10 statute miles
- Temperature: 86 °F, dew point 70 °F
- Altimeter: 29.00 inHg
- Observed at: CID, 23 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 19860626027869A](https://openairdocs.org/incident/19860626027869A), Jun 26, 1986: Scwzer G164B, Wellman, IA, Substantial damage. Struck powerliens and ground after a spray turn. Aircraft impacted inverted.

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.