Common use of Fuel Consumption Measurement Clause in Contracts

Fuel Consumption Measurement. The inflight data required for administration of this Guarantee will be obtained by Midway during steady state cruise conditions using methods which will be mutually agreed between Midway and IAE. Steady state cruise conditions are defined as a minimum of five minutes at the same altitude, Mach number and thrust setting Engine Pressure Ratio in clear, smooth air with normal bleed and power extraction and autothrottle disengaged (unless flight evaluation shows this disengagement to be unnecessary). Data points falling within the following envelope of altitude, Mach number and Engine Pressure Ratio: Mach No. -- TBD to TBD, Altitude - TBD to TBD feet, Engine Pressure Ratio - TBD to TBD will be deemed to be Acceptable Data Points, provided that: a) the fuel consumption data for any Eligible Engine on which the engine parameters indicate a possible malfunction (including associated Aircraft systems), other than normal gas path deterioration, that is subsequently confirmed by maintenance action will not be considered acceptable data, and b) data which is obviously inaccurate under normal engine monitoring practices will not be considered acceptable data; this type of data will be rejected unless Midway validity checks have established that Total Air Temperature, Fuel Flow Aircraft and Engine Bleed Systems and other Aircraft parameters are within normal operating ranges. The data to be recorded will be that normally recorded for Engine Condition Monitoring purposes and will include the following: Altitude Mach Number Total Air Temperature (TAT) Indicated Airspeed (IAS) Engine Pressure Ratio (EPR) Fuel Flow Low Compressor Rotor Speed (N(1)) High Compressor Rotor Speed (N(2)) Exhaust Gas Temperature (EGT) Bleed Air Configuration Engine Fuel flow measurements will be referred to in the Standard Engine Fuel Flow-Engine Pressure Ratio Relationship which will be defined for installed Engines by the Aircraft manufacturer during the Aircraft flight test certification program.

Fuel Consumption Measurement. The inflight data required for administration of this Guarantee will be obtained by Midway AWA during steady state cruise conditions using methods which will be mutually agreed between Midway AWA and IAE. Steady state cruise conditions are defined as a minimum of five minutes at the same altitude, Mach number and thrust setting Engine Pressure Ratio in clear, smooth air with normal bleed and power extraction and autothrottle disengaged (unless flight evaluation shows this disengagement to be unnecessary). Data points falling within the following envelope of altitude, Mach number and Engine Pressure Ratio: Mach No. -- TBD to TBD, Altitude - -- TBD to TBD feet, Engine Pressure Ratio - -- TBD to TBD will be deemed to be Acceptable Data Points, provided that: a) 1. the fuel consumption data for any Eligible Engine on which the engine parameters indicate a possible malfunction (including associated Aircraft systems), other than normal gas path deterioration, that is subsequently confirmed by maintenance action will not be considered acceptable data, and b) 2. data which is obviously inaccurate under normal engine monitoring practices will not be considered acceptable data; this type of data will be rejected unless Midway AWA validity checks have established that Total Air Temperature, Fuel Flow Aircraft and Engine Bleed Systems and other Aircraft parameters are within normal operating ranges. 1. 105 The data to be recorded will be that normally recorded for Engine Condition Monitoring purposes and will include the following: Altitude Mach Number Total Air Temperature (TAT) Indicated Airspeed (IAS) Engine Pressure Ratio (EPR) Fuel Flow Low Compressor Rotor Speed (N(1)N1) High Compressor Rotor Speed (N(2)N2) Exhaust Gas Temperature (EGT) Bleed Air Configuration Engine Fuel flow Flow measurements will be referred to in the Standard Engine Fuel Flow-Engine Pressure Ratio Relationship which will be defined for installed Engines by the Aircraft manufacturer during the Aircraft flight test certification program.