# NTSB MKC86FA101: Aero Commander 680FL, N1198Z, Grand Island, NE, May 9, 1986

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Field investigation · Final report
- Date: May 9, 1986, 02:38 local (07:38 UTC)
- Place: Grand Island, NE
- Coordinates: 40.950489, -98.289207 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=40.9505&lon=-98.2892&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 34066
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC86FA101
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/34066/pdf
- Page: https://openairdocs.org/ntsb/MKC86FA101

## Sequence of events

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

- Loss of engine power, approach
  - engine assembly,cylinder - failure,total (contributing factor)
  - maintenance - improper, other maintenance personnel (contributing factor)
  - in-flight planning/decision - improper, pilot in command (cause)
  - wrong propeller feathered - selected, pilot in command (cause)
- In flight collision with object, descent - emergency
  - object - tree(s) (contributing factor)
- In flight collision with terrain/water, descent - uncontrolled
- Fire, other

## Analysis

THE TWIN ENG ACFT CRASHED AND BURNED 4 MILES NORTH OF THE ARPT WHILE ON AN INSTRUMENT APCH. THE PLT HAD TRANSMITTED THAT HE HAD AN ENGINE PROBLEM. THE #5 CYLINDER WAS FOUND DETACHED FROM THE LEFT ENGINE BUT THE LEFT PROPELLER WAS NOT FEATHERED. AN ENGINE TEARDOWN REVEALED EVIDENCE TO INDICATE THE #5 CYLINDER ATTACHMENTS WERE NOT PROPERLY TORQUED. NO PREIMPACT FAILURE COULD BE FOUND WITH THE RIGHT ENGINE. THE RIGHT PROPELLER WAS FOUND IN FEATHERED POSITION.

## Aircraft

- Registration: [N1198Z](https://openairdocs.org/deregistered/N1198Z-1988-04-06), registration cancelled 1988-04-06, S/N 1608116 (OpenAirDocs)
- Reported make and model: AERO COMMANDER 680FL
- Registry model: [Aero Commander 680FL](https://openairdocs.org/model/aero-commander-680fl) (registry code 0141608) (OpenAirDocs)
- Category: Airplane
- Serial number: 1608-116
- Airframe hours: 7340
- Engines: LYCOMING IGSO-540-B1A 380 horsepower reciprocating
- Damage: Destroyed
- Fire: On-Ground
- Flight: Part 135
- Operator: Suburban Air Freight,Inc.
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, April 2, 1986
- Departed: OMA, OMAHA, NE
- Flight plan: IFR
- Airport: GRI, Central Nebraska Regional

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 31; flight instructor, airline transport, commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: left; toxicology performed; flight hours: 5,522 total, 520 in this make and model

## Weather

- Conditions: Visual (VMC), Night/dark
- Wind: 160° at 16 knots
- Visibility: 7 statute miles
- Lowest ceiling: 1,000 ft overcast
- Temperature: 59 °F, dew point 55 °F
- Altimeter: 29.00 inHg
- Observed at: GRI, 4 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 19860509019659A](https://openairdocs.org/incident/19860509019659A), May 9, 1986: Gulstm 680FL, Grand Island, NE, Destroyed. Lost the left engine on instrument approach. Feathered the other engine and crashed into trees. Unsecured cylinder.

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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