Fuel savings
- Up to 85% reduction of fuel savings during taxing
- Fuel savings of 4-12% depending on trip length.
- 150 to 300 LB fuel saved per cycle using Green Taxi for a 15 min Taxi Time.
- 750 to 1,500 Lb Fuel Saving per Day Per Aircraft= 150 or 300 Lb/ Cycle X 5 Cycles per day
- 262,500 to 525,000 Lbs Fuel Savings Per Year Per Aircraft= 750 or 1,500 Lb/Day X 350 days/year
- $262,500 to $525,000 Fuel Savings Per Year Per Aircraft @$1.00 per Lb fuel cost
CARBON BRAKE SAVINGS
- 30-40 brake applications Per Taxi Cycle without GreenTaxi System
- 5 brake applications Per Taxi Cycle with GreenTaxi System
- Green Taxi Saves 25-35 brake application Per Cycle
- Carbon Brake Life Extended by 2-3 times current brake life
- $35,000 Per Year Per Aircraft Brake Cost Savings
Assumptions for savings calculations
- 350 Days Per Year of Flight Operations
- 15 Minute average Taxi time
- 30 - 40 Brake Applications Per Cycle
- 150 Lb of fuel used for Single Engine 15 minute Taxi
- 300 Lb of fuel used for Two Engine 15 minute Taxi
- 1,135.6 grams of CO Per Engine Per Taxi Operation
- $6.70 Per Gallon/ $1.00 Per Lb Current Fuel Cost
- $10 Cost Per Landing Per Brake = $40 Per Aircraft Per Cycle.
PUSHBACK SAVINGS
- Cost for Tug and Driver = $50.00 per Pushback
- $87,500 Savings Per Year Per Aircraft
TOTAL DIRECT COST SAVINGS
- $ 385,000 to $647,500 Savings Per Year Per Aircraft
ENGINE START LATENCY SAVINGS
- Average Latency Time = 3.5 Minutes Per Aircraft Per Cycle
- Latency time Savings = 3.0 Minutes Per Aircraft Per Cycle
- 87.50 Hours Latency Savings Per Aircraft Per Year= 3.0 Mins X 5 X 350
EMISSIONS SAVINGS
- 1,135.6 Grams of CO Savings Each Cycle
- 5,678 Grams of CO Savings Per Aircraft Per Day
- 1987.3 Kg of CO Savings Per Aircraft Per Year
- 109,301.5 Kg of CO Savings Fleetwide Per Year
Emissions Control Benefits
- Every 2204.62 lbs (1000 kg) of jet fuel burned releases the following combustion by-products
- CO2 – 6040.66 lb (2,740 kg)
- Emissions savings per year per aircraft:
- CO2 – 2,790,690 lb (1,265,834 kg)
- CH4 – 3,297 lb (1,496 kg )
- Converting an entire fleet saves millions of tons of CO2 per year.
Ground operation greenhouse gas emissions (CO2, CO, NOx, HC, SO2 and PM) reduced by 85%.
- 55% of all airport related emissions are from aircraft
- Aircraft Taxiing is responsible for 51% of these emissions.
Less use of the brakes during the taxi phase
- Significant reduction of brake application cycles during taxi due to high engine thrust
- Increases brake cool down time after landing
- Increased brake life of at least 2-3 X
Reduced engine maintenance & operating costs
- 50% Reduction in engine Foreign Object Damage (FOD)
- Each engine will operate approximately 600 fewer hours per year with Green Taxi
Improved aircraft turnaround times, aircraft utilization, and schedule dependability
- Airport noise is reduced dramatically allowing for earlier taxi times
- Eliminates wait times for available tugs
- Supports early morning departures under strict noise abatement regulations.
- Green Taxi reduces safety clearance delays improving efficiency during peak hours. Green Taxi pushback times are shorter and more dependable, requiring less schedule padding by aircraft operators to meet on-time metrics.
Increase safety to ground personnel and equipment
- No jet blast consequences to personnel and equipment
- Reduced ground emissions for personnel health
- Significantly lower noise levels
- Increased aircraft controllability due to more precise speed control
Eliminates the need for tractors/tugs for ground operations.
- No ground tugs required reducing turnaround times and improving on-time performance
- Reduction of airport tug collisions and damage.
- Frees up tugs for operators not using the Green Taxi system
- Reduced risk of accidents due to ground vehicle movement
- Less reliance on ground equipment at remote locations
Increased safety for ground personnel protected from jet blast, jet emissions & noise
Corporate branding and customer goodwill - A Greener Fleet
-
85%
reduction in jet fuel during taxling
-
85%
reduction in CO2 & noxious gases
-
60%
reduction in noise during taxling
-
50%
reduction in foreign object damage
-
30%
increase in gate eficiency
The Green Taxi System is a potential alternative means of compliance to the CFM engines proposed AD due to damage from dust as the engines will run 85% less on the ground by utilizing our Electric Taxi Operation instead of having the main engines operating on the ground.
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA-2022-0160; Project Identifier AD-2022-00009-E] RIN 2120-AA64 Airworthiness Directives; CFM International, S.A. Turbofan Engines (summary)
AGENCY:Federal Aviation Administration (FAA), DOT.
ACTION:Notice of proposed rulemaking (NPRM).
SUMMARY:The FAA proposes to adopt a new airworthiness directive (AD) for certain
CFM International, S.A. (CFM) LEAP-1A model turbofan engines. This proposed AD was prompted by reports of two in-flight shutdowns (IFSDs) and subsequent investigation by the manufacturer that revealed cracks in the high-pressure turbine (HPT) rotor stage 1 blades (rotor stage 1 blade deterioration and airfoil distress due to the build-up of dust.). The FAA is proposing this AD to address the unsafe condition on these products.Background The FAA received reports of two single-engine IFSDs on airplanes powered by LEAP-1A model turbofan engines, operating extensively in the Middle East and North Africa (MENA) region. A post-flight BSI of the HPT module revealed that the engine failures were due to cracks in the HPT rotor stage 1 blades. After investigation, the manufacturer determined that engines operating in the MENA region are susceptible to accelerated HPT rotor stage 1 blade deterioration and airfoil distress due to the build-up of dust. This unsafe condition, if not addressed, could result in failure of the engine, in- flight shutdown, loss of thrust control, and loss of the airplane. The FAA estimates the following costs to do any necessary reporting and replacements that would be required based on the results of the proposed inspections. The agency has no way of determining the number of airplanes that might need these replacements.
Action Labor Cost Parts Cost Cost per product Replace the HPT rotor stage 1 blades 150 work-hours x $85 per hour = $12,750 Labor Plus $988,200 $1,000,950 in Damaged Parts Cost Replace the HPT stator stage 1 nozzle set 24 work-hours x $85 per hour = $2,040 Labor Plus $701,460 $703,500 in Damaged Parts Cost
