# NTSB MKC86IA018: SAAB-Fairchild SF340A, N342AM, Lincoln, NE, October 29, 1985

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: October 29, 1985, 11:00 local (17:00 UTC)
- Place: Lincoln, NE
- Coordinates: 40.820648, -96.700523 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=40.8206&lon=-96.7005&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 10 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 34095
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC86IA018
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/34095/pdf
- Page: https://openairdocs.org/ntsb/MKC86IA018

## Sequence of events

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

- Airframe/component/system failure/malfunction, landing - roll
  - landing gear,wheel - separation (cause)
  - maintenance,replacement - improper, company maintenance personnel (cause)
  - insufficient standards/requirements,aircraft, manufacturer (contributing factor)
  - insufficient standards/requirements,aircraft, company/operator mgmt (contributing factor)

## Analysis

DURING LANDING ROLL AT THE LINCOLN AIRPORT, THE OUTBOARD WHEEL OF THE LEFT MAIN LANDING GEAR SEPARATED FROM THE AXLE. THE ACFT WAS NOT HAMPERED IN ITS LANDING ROLL AND TAXITHE LANDING GEAR ASSEMBLY REVEALED THAT A RETAINING NUT WASHER WAS NOT INSTALLED ON THIS ASSEMBLY. THIS ALLOWED THE WHEEL TO SHIFT SIDEWARDS AND SUBSEQUENTLY FALL FREE FROM THE AXLE. MAINTENACE RECORDS SHOWED THAT THIS WHEEL HAD BEEN CHANGED 10 DAYS PRIOR TO THIS FLIGHT.

## Aircraft

- Registration: [N342AM](https://openairdocs.org/deregistered/N342AM-1993-11-30), registration cancelled 1993-11-30, S/N 340A011 (OpenAirDocs)
- Reported make and model: SAAB-Fairchild SF340A
- Registry model: [Saab-Fairchild 340A](https://openairdocs.org/model/saab-fairchild-340a) (registry code 7850100) (OpenAirDocs)
- Category: Airplane
- Serial number: 340A-011
- Airframe hours: 1598
- Engines: GE CT7-5A2 1700 horsepower turbo prop
- Damage: No damage
- Flight: Part 135
- Operator: Air Midwest
- Airworthiness certificate: Standard, Transport
- Last inspection: AAIP, October 29, 1985, 2 hours before
- Departed: MCI, KANSAS CITY, MO
- Destination: LNK, LINCOLN, NE
- Flight plan: IFR
- Airport: LNK, Lincoln, runway 32, 8,620 × 150 ft, concrete

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 55; airline transport; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 19,000 total, 650 in this make and model

## Weather

- Conditions: Visual (VMC), Day
- Wind: 330° at 3 knots
- Visibility: 20 statute miles
- Lowest ceiling: 20,000 ft overcast
- Temperature: 54 °F, dew point 41 °F
- Altimeter: 30.00 inHg
- Observed at: LNK

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Incident 19851029072699I](https://openairdocs.org/incident/19851029072699I), Oct 29, 1985: Saab SF340A, Lincoln, NE. Outer left main wheel separated from axle during landing. Retaining nut washer not installed. Safe landing.

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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