# NTSB DEN82DA079: Cessna 402A, N4504Q, Bismarck, ND, May 7, 1982

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Final report
- Date: May 6, 1982, 21:07 local (May 7, 1982, 02:07 UTC)
- Place: Bismarck, ND
- Location: 46.7727° N, 100.7457° W: Placed by OpenAirDocs at BISMARCK MUNI (BIS), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=46.7727&lon=-100.7457&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 8 uninjured
- Status: Completed, report May 6, 1983
- Report: Approved by Office Director
- NTSB case key (mKey): 69966
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN82DA079
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/69966/pdf
- Page: https://openairdocs.org/ntsb/DEN82DA079

## Sequence of events

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

- In flight collision with terrain/water, landing - flare/touchdown
  - landing gear,emergency extension assembly - jammed (cause)
  - wheels up landing - performed, pilot in command

## Analysis

THE PILOT DISCOVERED THAT THE GEAR WOULD NOT EXTEND ELECTRICALLY. MANUAL EXTENSION WAS ATTEMPTED, BUT THE CRANK WOULD NOT TURN IN EITHER DIRECTION. WHILE APPLYING PRESSURE TO THE CRANKS, THE CHAIN DRIVE FAILED. THE PLANE WAS LANDED WITH THE GEAR RETRACTED. DISASSEMBLY OF THE EMERGENCY EXTENSION SYSTEM REVEALED THAT A SHAFT, PN 0843400-50, WAS BENT AND GOUGE MARKS WERE FOUND ON A TOOTH OF A BEVEL GEAR, PN 0843400-49. ALSO, THE MANUAL EXTENSION CHAIN, PN 500000-52, BETWEEN THE HAND CRANK AND BEVEL GEARS, HAD BROKEN. NO OTHER DISCREPANCIES WERE EVIDENT IN THE LANDING GEAR SYSTEM.

## Aircraft

- Registration: [N4504Q](https://openairdocs.org/deregistered/N4504Q-2017-06-08), registration cancelled 2017-06-08, S/N 402A0004, built 1968 (OpenAirDocs)
- Reported make and model: CESSNA 402A
- Registry model: [Cessna 402A](https://openairdocs.org/model/cessna-402a) (registry code 207590M) (OpenAirDocs)
- Registry engine: [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series) (registry code 17032, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 402A0004
- Airframe hours: 3378
- Engines: CONTINENTAL TSIO-520-E 300 horsepower reciprocating
- Damage: Substantial damage
- Flight: Part 135
- Operator: Capital Aviation Corporation
- Registered owner: Capital Aviation Corporation
- Departed: FAR, FARGO, ND
- Destination: MONTEREY, CA
- Flight plan: VFR
- Airport: BIS, Bismarck Municipal, runway 35, 4,009 × 100 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 64; flight instructor, commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; flight hours: 30,000 total, 179 in this make and model, 30,000 as pilot in command, 102 in the last 90 days, 5 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Dusk
- Wind: 320° at 10 knots
- Visibility: 12 statute miles
- Temperature: 104 °F
- Altimeter: 29.00 inHg
- Observed at: BIS

## 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 19820506014099I](https://openairdocs.org/incident/19820506014099I), May 6, 1982: Cessna 402A, Bismarck, ND, Minor damage. Unable to lower gear. Broke chain trying to lower gear manually. Landed gear up. Suspect chain jammed gear.

## Other investigations on N4504Q (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 DEN92FA081](https://openairdocs.org/ntsb/DEN92FA081), Aug 5, 1992: Cessna 402A (N4504Q), Holyoke, CO, substantial damage. Probable cause: FAILURE OF THE PILOT TO FEATHER THE FAILED ENGINE PROPELLER. A FACTOR WAS: POWER LOSS FOR UNDETERMINED REASONS.
- [NTSB SEA75AS045](https://openairdocs.org/ntsb/SEA75AS045), Jun 15, 1975: Cessna 402A (N4504Q), Seattle, WA, substantial damage
- [NTSB ANC73AA053](https://openairdocs.org/ntsb/ANC73AA053), Jun 26, 1973: Cessna 402A (N4504Q), Dillingham, AK, 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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