Cirrus Airframe Parachute System and Odds of a Fatal Accident in Cirrus Aircraft Crashes

Abstract A fatal accident occurred when a right angle gear box on an auger elevator disintegrated freeing the outboard end of a rotating PTO shaft. The tractor, acting as a stationary power source, flailed the PTO shaft which then struck and killed a farmer. No similar occurrences have been reported for the nearly 2000 similar units which have been used for over a decade. This paper studies a number of fundamental failure modes in order to determine which failure modes created the accident. Systematic analysis showed that the accident was caused by unusual misuse of the product. Known safety control concepts do not preclude this unforeseeable event.

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Significance of analysis of the mechanism of fingermarks formation, sizes and location – casework examples

Issues of Forensic Science ◽

10.34836/pk.2018.301.1 ◽

2018 ◽

Vol 301 ◽

pp. 44-52

Author(s):

Tomasz Kowalski ◽

Keyword(s):

Significant Role ◽

Special Interest ◽

The Other ◽

Fatal Accident ◽

Preliminary Stage ◽

Additional Information ◽

Expert Opinions ◽

First Case ◽

Initial Stage

The aim of the article to present the role of analysing the manner of generating fingermarks in the investigative proceedings. These examinations are based on the analysis of the location of the marks on a given background and aim at providing the requesting party additional information about the circumstances of the investigated incident. The Author refers to two unusual cases, in which Voivodeship Police Command Forensic Laboratory issued expert opinions in the area of fingerprint identification. In the first case, at the initial stage of the proceedings the circumstances and recovered evidential fingermarks indicated a fatal accident or manslaughter by means of a firearm. In the other case at the preliminary stage recovered evidence did not allow identification of the perpetrator due to incorrectly selected exhibits. These cases would not be off special interest to us without the significant role of proper recovering of fingermarks and their analysis in a broader context than just identification.

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