A Field Representative reports on the installation of the same (standard) configuration file into Military Bell helicopters; that may provide inaccurate data; that could potentially illuminate the 'trend lamp'; requiring an immediate set down of a helicopter.

Narrative

The Government contract with Pratt & Whitney Engine Services expired and Agency decided not to renew the engine trend monitoring service that is required along with the engine trend monitoring system.I am a Field Service Representative and I spent the summer of 2008; supporting Agency and the Engine Trend Monitoring Systems installed on their Bell N-registered aircraft. I received an anonymous phone call from one of the civilian technicians who install these systems. This person was greatly concerned because his team was instructed to install the systems and load an improper configuration file (contains engine/airframe parameters that we monitor) into the engine trend monitor. In fact; they are using the same configuration file for all of their monitors because the Agency refuses to pay for the service that the 'real' configuration files would be generated from. Therefore; the system is being misused because each configuration is specific to an aircraft. By using the same configuration file for each aircraft; there is no way to ensure that the engine trend monitor is calibrated properly with the instrumentation of the aircraft.Fortunately; the system is passive. However; if they are using an improper configuration file; it has the potential to illuminate the 'trend lamp' in the cockpit if an exceedance is detected by the monitor. This exceedance may be false; because the aircraft is not calibrated properly and contains the wrong configuration file. When this light is illuminated; the instructors/students are required to set the aircraft down immediately (usually in large fields). If these illuminations are false because of the improper use of the system; the students and instructors are distracted when it is not necessary; and that distraction could lead to an accident/incident. I have brought this to the attention of Pratt & Whitney Canada (Pratt & Whitney Engine Services); but no action has been taken. Some argue that it is not a safety hazard. However; for a technician to place an anonymous phone call to me; voicing his concern...I take this very seriously. This needs to be looked into and has been ongoing since October 2008.