# NTSB MKC84LA048: Cessna 402B, N7947Q, Davenport, IA, December 29, 1983

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: December 29, 1983, 13:48 local (19:48 UTC)
- Place: Davenport, IA
- Coordinates: 41.519344, -90.570281 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=41.5193&lon=-90.5703&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 5 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 33610
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC84LA048
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/33610/pdf
- Page: https://openairdocs.org/ntsb/MKC84LA048

## Sequence of events

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

- Loss of control - on ground/water, landing - flare/touchdown
  - terrain condition - icy (contributing factor)
  - directional control - not possible, pilot in command (cause)
  - ground loop/swerve - uncontrolled, pilot in command (cause)
- On ground/water encounter with terrain/water, landing - roll
  - terrain condition - snowbank (contributing factor)
- Nose gear collapsed, landing - roll
  - landing gear,nose gear - overload (contributing factor)

## Analysis

THE ACFT SKIDDED SIDEWAYS DURING LANDING ON AN ICY RWY. THE NOSE GEAR COLLAPSED SIDEWAYS WHEN IT COLLIDED WITH A SNOWBANK AT THE RWYS EDGE. THERE WERE NO INJURIES.

## Aircraft

- Registration: [N7947Q](https://openairdocs.org/deregistered/N7947Q-2020-03-30), registration cancelled 2020-03-30, S/N 402B0397, built 1973 (OpenAirDocs)
- Reported make and model: CESSNA 402B
- Registry model: [Cessna 402B](https://openairdocs.org/model/cessna-402b) (registry code 207590P) (OpenAirDocs)
- Registry engine: [Continental TSIO-520 series](https://openairdocs.org/engine/continental-tsio-520-series) (registry code 17040, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 402B0397
- Airframe hours: 1609
- Engines: CONTINENTAL TSI0-520-E 300 horsepower reciprocating
- Damage: Substantial damage
- Flight: Part 135
- Registered owner: Midwest Aviation Corporation
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, August 29, 1983, 3 hours before
- Departed: DSM, DES MOINES, IA
- Destination: DVN, DAVENPORT, IA
- Flight plan: VFR
- Airport: DVN, Davenport Muni, runway 21, 4,001 × 100 ft, concrete

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 64; airline transport, flight instructor; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 8,326 total, 436 in this make and model, 8,209 as pilot in command, 143 in the last 90 days, 2 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 300° at 10 knots, gusting 15
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 10 °F, dew point 5 °F
- Altimeter: 29.00 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 19831229064949A](https://openairdocs.org/incident/19831229064949A), Dec 29, 1983: Cessna 402B, Davenport, IA, Substantial damage. Landed on icy, crosswind runway and slid into a snowbank. Other runway not plowed. Too much crosswind for ice.

## Other investigations on N7947Q (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 ANC19LA039](https://openairdocs.org/ntsb/ANC19LA039), Jul 22, 2019: Cessna 402 (N7947Q), Boise, ID, substantial damage. Probable cause: A ductile overstress fracture failure of the right main landing gear bell crank assembly pivot bolt, which resulted in a collapse of the right main landing gear.

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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