Expert Witness Blog

Electrical expert witness David J. Marne, P.E., is the author of McGraw-Hill’s National Electrical Safety Code® (NESC®) Handbook. Here he answers the question:

Do communications utility workers and power utility workers need to follow the NESC® or OSHA rules?

Both.

In Mold, Housing and Wood, building materials experts at the Western Wood Products Association write:

Other conditions can increase the amount of mold spores in the indoor air of buildings. Homes with exposed-dirt crawl spaces and basements tend to have more airborne mold spores than homes without (Lumpkins, 1973; Su, 1992). With the right humidity conditions, some molds can grow on house dust. It is not surprising, then, that poor housekeeping and high indoor humidity are both associated with increased levels of airborne mold spores (Solomon, 1975; Kozak, 1979).

The biggest source of indoor mold spores is often the outdoor air (Solomon, 1975). Higher levels of indoor mold spores tend to be found in homes with yards having dense and overgrown landscaping (Kozak, 1979).

In Driver Fatigue is the Number One Safety Issue in the Truck and Bus Industry, fatigue expert witness Dennis Wylie writes:

The Commercial Motor Vehicle Driver Fatigue and Alertness Study

The importance of driver fatigue led the U.S. Department of Transportation and Transport Canada to commission the largest, most comprehensive over-the-road study of driver fatigue and alertness ever conducted. Dennis Wylie was the Principal Investigator, and he and his associates designed, executed, and documented a study involving 80 U.S. and Canadian tractor-trailer drivers in an operational setting of real-life, revenue-generating trips totaling more than 200,000 miles and 4,000 hours of driving. The scientists monitored the drivers and trucks continuously by electronic instrumentation. The study focused on several work-related factors, including:

In Parts Produced by an Owner or Operator. Are They Legal? aircraft operations expert witness David A Botich writes on how owners may keep their aircraft airworthy if parts are unavailable or otherwise unobtainable:

As this has been a subject that many have asked “how do I do this?”, the Assistant Chief Counsel for Regulations, AGC-200 of the FAA has written a Memo addressing this issue. I will summarize the main points of concern here.

1. Only the owner/operator can produce the part for their aircraft. They cannot produce that part for sale or for another aircraft.

In Apartment Security and Litigation: Key Issues, criminalistics expert witness Daniel B. Kennedy writes on the nature of premises liability litigation in an apartment setting:

Criminologists and security specialists are very important in premises liability for negligent security litigation (Kennedy and Homant, 1996). Although the role of criminologists and security specialists in litigation has been criticized (Godwin and Godwin, 1984; Ingraham,
1987), it is often difficult to present or defend a premises liability case without the presentation of testimony by an expert. For example, before a duty even arises, a judge must be convinced that a given crime was foreseeable; that there was a reasonable likelihood or an appreciable chance that victimization would occur (Homant and Kennedy, 1994). Information to that effect can be presented through a criminologist who analyzes prior crime patterns at a location or in its surrounding neighborhood. The principle here is that the best way to forecast future crime at a location is to examine prior crime at a location. A criminologist may also examine certain land uses, architecture, socioeconomic characteristics, and general ecology of a neighborhood in order to establish the presence of crime correlates (Kennedy, 1993).

In THE PERFECT STORM: The Science Behind Subrogating Catastrophic Flood Losses, floods expert witness Richard Van Bruggen writes:

Most standard property policies and flood policies contain subrogation clauses which prohibit the insureds from giving up any rights to recover from any entities that may be responsible for a flood loss. Impairment of an insurer’s subrogation rights, which should be looked for in contracts, leases, or other agreements which the insured entered into, discharge the insurer from any obligation to make a payment under the policy. This became a big issue with Hurricane Katrina.
Owners and mortgagee should be careful not to sign releases that might impair the subrogation rights of their insurers.

Trucking computer systems expert witness Robert R. Reed writes on Truck/tractor-trailer crashes:

Some very important items often overlooked in truck crashes are the “OBC” on board computer system and “GPS” global positioning satellite systems used on approximately 70% of modern carriers fleet. Another feature overlooked is the “ECM” engine control modules and “ABS” anti-lock brake system modules that have been on most large trucks since the late 1990’s. The “GPS” and “OBC” are used to monitor drivers, freight, positions of equipment, communications, hours of service, fuel consumption, dispatch, maintenance, driver activities and truck operation and build data reports into the trucking computer systems that are used during the normal course of business in the trucking industry and can be available to assist in crash reconstruction. “ECM” and “ABS” modules are systems built into the truck’s electrical system that record and store information on the trucks operation including speed, distance brake usage and diagnostics of both engine and brake system.

In Parts Produced by an Owner or Operator. Are They Legal? flight operations expert witness David A Botich offers an excerpt from Federal Aviation Regulations:

PART 21-CERTIFICATION PROCEDURES FOR PRODUCTS AND PARTS

Subpart K – Approval of Materials, Parts, Processes, and Appliances