Compute Requirements

 

Airline
Aircraft Type	Airbus A318 Airbus A319 Airbus A319CJ Airbus A320 Airbus A321 Airbus A340 Boeing 737-300 Boeing 737-400 Boeing 737-500 Boeing 737-600 Boeing 737-700 Boeing 737-800 Boeing 737-900 Boeing BBJ
Engine Type	CFM56-5B8 CFM56-5B9
Thrust rating (lb)	21600
Starting year

Year
Number of aircraft
Average flight hours per year per aircraft (500 - 5000)
Number of available spare engines
Projected shop visit rate (ev/1000EFH) (0.3 - 0.18)

Total Engine turn around time 

30 Days 35 Days 40 Days 45 Days 50 Days 55 Days 60 Days 65 Days 70 Days 75 Days 80 Days 85 Days 90 Days 95 Days 100 Days 105 Days 110 Days 115 Days 120 Days

Required Spare engine protection Confidence level 

90% 92% 95% 97%

Shannon Engine Support Spare Engine Requirement analysis for

	1	2	3	4	5
Calendar Year
Aircraft in service
Engine Flight hours
Projected Shop Visit rates
Total shop visits
TOTAL Eng Turn time
Total engines process days
Average engines in process
Spares Rec above %
Customer owned spare engines
----> protection confidence level
additional spare engine requirement

This calculation is provided for informational purposes only.