Like any kind of “extended coverage” arrangement, engine maintenance programs (EMPs) are polarizing subjects. Some say they’re unquestionably worth the value they deliver, while others are just as sure that they’re worthless. What do early color TVs have to do with first-gen turbine aircraft engines? Well, more than you might think. In the early days of “The Wonderful World of Color,” you’d be lucky if the old RCA would last through the show. Their cathode-ray and vacuum [...]

The market for Diamond DA 42 multiengine diesel-powered aircraft has matured now that the aircraft has been on the market since 2006. The aircraft and its powerplants have, like any groundbreaking and innovative product, experienced many iterations as the new diesel engine technology proved itself over time. Usually an airframer introduces a new airframe with a conventional, proven powerplant. With the introduction of the DA 42 Diamond broke with that tradition and introduced an entirely new airframe [...]

Have you ever heard the term “Oil Analysis”? If so, do you have any idea as to what it means and why I’m asking you this question? Oil analysis is a tool that should be used by your maintenance provider. In my personal experience on several occasions the use of oil analysis was instrumental in preventing the fleet of aircraft we maintained from having major engine failures. The reason I want to address this is the vast [...]

The Federal Aviation Administration (FAA) regulations refer to the term “airworthy”, but you won’t find the term in the normal definitions section. Below you will see a couple of sources with the official definition. First in PlaneSense- General Aviation Information (FAA-H-8033-19A): Airworthiness Two conditions must be met for a standard category aircraft to be considered airworthy: The aircraft conforms to its type design (type certificate). Conformity to type design is attained when the required and proper components [...]

Reciprocating Engines Engine First Reading the “Aircraft for Sale” advertisements can be interesting and misleading. As aviation-oriented people, we are conditioned to look for certain bits of information which we believe will allow us to evaluate the product offered for sale. In the case of airplanes, this information can generally be segregated into three categories – airframe, avionics and engine. There does seem to be information on engines which cannot be emphasized too strongly. Engine information is [...]

Aircraft records that have been lost or destroyed are a highly debated subject. Some say that 30% to 50% of the value of an aircraft resides with the maintenance records. Whether this is accurate or not, they represent value and should be treated with care and respect their value and impact on your aircraft. Occasionally, the records for an aircraft are lost or destroyed. In order to reconstruct them, it is necessary to establish the total time [...]