# NTSB ATL86IA098: Cessna 404, N408EX, Mc Rae, GA, March 15, 1986

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Incident investigation · Final report
- Date: March 14, 1986, 22:30 local (Mar 15, 1986, 03:30 UTC)
- Place: Mc Rae, GA
- Coordinates: 32.059928, -82.899291 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=32.0599&lon=-82.8993&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 7013
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ATL86IA098
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/7013/pdf
- Page: https://openairdocs.org/ntsb/ATL86IA098

## Sequence of events

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

- Loss of engine power(total) - mech failure/malf, cruise - normal
  - engine assembly,connecting rod - failure,total (cause)
  - engine assembly,connecting rod - fatigue (cause)
- Forced landing, descent - emergency

## Analysis

DURING CRUISE FLIGHT PILOT HEARD LOUD BANG FROM RIGHT ENGINE AND RIGHT PROPELLER FEATHERED. AIRCRAFT WAS DIVERTED AND LANDED WITH NO FURTHER DAMAGE AND NO INJURIES TO THE PILOT. SUBSEQUENT TEARDOWN OF ENGINE REVEALED FRACTURED CONNECTING ROD. EXAMINATION OF ROD REVEALED FATIQUE FRACTURE DUE TO SURFACE INCLUSION IN ROD SHANK. INCLUSION RESULTED FROM OXIDES WHICH FORMED DURING HEAT TREATMENT AND WERE NOT COMPLETELY REMOVED PRIOR TO SHOT PEENING.

## Aircraft

- Registration: N408EX (not matched to a registry record)
- Reported make and model: CESSNA 404
- Category: Airplane
- Serial number: 404-0431
- Airframe hours: 6079
- Engines: CONTINENTAL GTSIO-520-M 375 horsepower reciprocating
- Damage: No damage
- Flight: Part 135
- Registered owner: Napier Air Service
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, February 23, 1986
- Departed: JAX, JACKSONVILLE, FL
- Destination: DHN, DOTHAN, AL
- Flight plan: IFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 2,260 total, 437 in this make and model, 152 in the last 90 days

## Weather

- Conditions: Visual (VMC), Night/dark
- Wind: 220° at 4 knots
- Visibility: 12 statute miles
- Lowest ceiling: none
- Temperature: 55 °F, dew point 54 °F
- Altimeter: 29.00 inHg
- Observed at: MCN, 45 nm away

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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