# NTSB CHI82DA056: Cessna 340A, N4140G, Near Lansing, MI, January 19, 1982

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Final report
- Date: January 19, 1982, 16:00 local (21:00 UTC)
- Place: Near Lansing, MI
- Coordinates: 42.790111, -84.590805 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=42.7901&lon=-84.5908&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report January 19, 1983
- Report: Approved by Office Director
- NTSB case key (mKey): 71887
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI82DA056
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/71887/pdf
- Page: https://openairdocs.org/ntsb/CHI82DA056

## Sequence of events

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

- Fire/explosion, cruise - normal
  - exhaust system,stack - loose (cause)
  - maintenance - inadequate, other person (cause)
  - exhaust system,stack - leak (cause)
  - throttle/power lever,cable - burned (contributing factor)
  - propeller control,cable - burned (contributing factor)
  - mixture control,cable - burned (contributing factor)
  - engine assembly,mount - burned (contributing factor)
  - fuselage,bulkhead - overtemperature (contributing factor)

## Analysis

DURING FLIGHT OVER LAKE MICHIGAN AT 13,000 FEET, THE PILOT NOTICED THAT THE THROTTLE, MIXTURE AND PROPELLER CONTROLS TO ONE OF THE ENGINES BEGAN BINDING. THE CONTROLS TO THE OTHER ENGINE REMAINED NORMAL. HE DESCENDED TO 9000 FEET AND CONTINUED AT REDUCED POWER. AFTER LANDING, AN INVESTIGATION REVEALED THAT THE EXHAUST STACK WAS LOOSE AT A SLIP JOINT WHERE IT PASSED THROUGH THE FIREWALL. HOT EXHAUST GASES HAD DAMAGED THE ENGINE CONTROLS, AN ENGINE MOUNT AND THE FIREWALL. THE AIRCRAFT HAD JUST COME OUT OF MAINTENANCE PRIOR TO THE FLIGHT.

## Aircraft

- Registration: [N4140G](https://openairdocs.org/aircraft/N4140G), registered now, S/N 340A0311, built 1977 (OpenAirDocs)
- Reported make and model: CESSNA 340A
- Registry model: [Cessna 340A](https://openairdocs.org/model/cessna-340a) (registry code 2076405) (OpenAirDocs)
- Registry engine: [Continental TSIO-520 series](https://openairdocs.org/engine/continental-tsio-520-series) (registry code 17040, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 340A0311
- Airframe hours: 1200
- Engines: CONTINENTAL TSIO-520-N 310 horsepower reciprocating
- Damage: Substantial damage
- Fire: In-Flight
- Flight: Business, Part 91
- Operator: Daniel E Mayworm
- Registered owner: Daniel E Mayworm
- Departed: CHICAGO, IL
- Destination: LANSING, MI
- Flight plan: IFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 54; commercial; airplane ratings: multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; flight hours: 3,300 total, 240 in this make and model, 3,137 as pilot in command, 65 in the last 90 days

## Weather

- Conditions: Day

## 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 19820119000849A](https://openairdocs.org/incident/19820119000849A), Jan 19, 1982: Cessna 340A, Lansing, IL, Substantial damage. Aircraft exhaust welded throttle and mixture controls so they would not move. Maintenance problem.

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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