ENGINES

Gas Path Analysis is a proven method of monitoring engine condition.

The benefits are:

• Early detection of problems that could lead to unscheduled aircraft downtime, expensive repairs and ground running.
• Identification of problems with main engine instrumentation followed by minimization of rectification times.
• Prevention of aircraft being stranded on hot days and restricted of take-off power because of limiting ITT (inter-turbine temperature).
• Limitation of hot section deterioration when engine operated inadvertently at excessive ITT.
• Limitation of possible fuel wastage and engine deterioration due to bleed air losses from defective bleed valves or ducting.
• Indication of engine degradation with age by providing a continual reading of ITT.

During steady state cruise, the engine main parameters (fuel flow, shaft speeds and turbine gas temperature) are recorded, either manually (Kneepad) or electronically (DEEC), along with the parameters which define the aircraft state (altitude, air temperature and Mach number).

The engine parameters are corrected to standard conditions. The values are then compared with a computer-generated model. A plot of deviations, suitably smoothed, is produced to assess the condition of the engine.

Jet-Care supplies the operator with:

• A prompt alert if the trends show significant movement (PDF version or ECHO^® version).
• A monthly report of the trend plots for the aircraft (PDF version or ECHO^® version).

Please select your engine type from the menu on the left, in order to download the following documents:

• Enrollment form: To start the GPA services or update your details
• Trend Sheet: To report cockpit (kneepad) data
• Guide: For general information about Jet-Care GPA services
• SIL: Honeywell Service Information Letters