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Calculation method for direct maintenance cost (DMC) of aircraft

A maintenance cost and calculation method technology, applied in the aviation field, can solve problems such as analysis and control problems that have not formed a mature set

Inactive Publication Date: 2014-12-17
AVIC SAC COMML AIRCRAFT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, domestically, there is still no mature concept on how to grasp the DMC problem as a whole, and there is no mature method on how to consider the DMC analysis and control problem from the perspective of the entire life of the aircraft

Method used

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  • Calculation method for direct maintenance cost (DMC) of aircraft
  • Calculation method for direct maintenance cost (DMC) of aircraft
  • Calculation method for direct maintenance cost (DMC) of aircraft

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0232] Table 1 Example 1 - Proximity Time Integration

[0233]

[0234] according to image 3 , since the detailed visual inspection is more stringent than the general visual inspection, in actual operation, we can directly use the detailed visual inspection of DTA to cover the inspection requirements for cracks in the MSG-3 task (assumed to be 0.5 hours), by integrating We found that the total man-hours of maintenance tasks are: 0.5*2+1*4=5 hours, as shown in Table 2.

[0235] Table 2 Example 1 - Maintenance time integration

[0236]

[0237]

[0238] Step 3: Statistics and summation

[0239] After the integration of approach time and repair time, the sum of the actual direct repair costs of these two repair tasks is: C Str =60×[(1+3)×4+(0.5×2+1×4)] / 60000=0.021$ / FH. This value is 0.003$ / FH lower than before integration.

Embodiment 2

[0240] Example 2: This example estimates the unplanned maintenance cost of an aircraft under research due to a special event, and the specific steps are as follows:

[0241] Step 1: Determine the category of the calculation object

[0242] Through selection, the cost of unplanned maintenance of an aircraft under development due to a special event should belong to the "unplanned maintenance cost based on special events" in the "DMC estimate based on product design".

[0243] Collect input data as follows:

[0244] ·Average segment: 2 hours;

[0245] ·Special event type: bird strike;

[0246] · Labor hour rate: 60$ / FH;

[0247] Each maintenance man-hour is: 1 hour;

[0248] ·Special event probability: the probability of encountering bird strikes is 1.67×10 -8 / flight, and the distribution of bird strikes on various parts of the aircraft is: engine 21%, wing 19%, windshield 17%, radome 16%, fuselage 11%, landing gear 5%, and more than one part 11%;

[0249] ·Material cost: 5...

Embodiment 3

[0259] Embodiment 3: In this example, the maintenance cost of a single engine of an aircraft in service is calculated as follows, and the specific steps are as follows:

[0260] Step 1: Determine the category of the calculation object

[0261] Through selection, the cost incurred by the maintenance of a single engine of an in-service aircraft should belong to the "engine maintenance cost" in the "DMC calculation based on data collection".

[0262] Collect input data as follows:

[0263] ·Engine model: YYYxx-xx;

[0264] Reasons for maintenance: mechanical failure and oil leakage, etc.;

[0265] ·Maintenance method: workshop maintenance;

[0266] ·Send it for repair twice during the collection period;

[0267] · Maintenance times: 1st time;

[0268] ◇Labor cost: 20000$;

[0269] ◇Material cost (excluding time control): 40000$;

[0270] ◇Outsourcing repair cost: 60000$;

[0271] ◇Time control fee: 30000$;

[0272] ◇Time from last maintenance: 12000FH;

[0273] ·Mainten...

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Abstract

The invention provides a calculation method for a direct maintenance cost (DMC) of an aircraft and belongs to the technical field of aviation. Based on aircraft design data or aircraft use data, the DMC at a mature period of the aircraft or the DMC in a certain time period can be calculated; the calculation method is the basis of DMC control of a development stage of the aircraft and DMC monitoring of an operation phase, and mainly comprises three aspects of judgment of a belonged object of a calculation object, application of the calculation method, statistics and summation, wherein the judgment of the belonged object of the calculation object gives a whole flow and an input condition of the DMC calculation; the application of the calculation method comprises DMC pre-estimation based on an aircraft design and calculation based on the aircraft use data and comprises the execution of an integration flow of approaching time and maintenance time, which needs to be abided by the DMC pre-estimation based on the aircraft design; the statistics and summation can be used for carrying out classification treatment on a calculation result and future data can be conveniently analyzed and used.

Description

technical field [0001] The invention belongs to the field of aviation technology, in particular to a method for calculating aircraft direct maintenance costs. Background technique [0002] According to the survey, the factors that affect the satisfaction of aircraft buyers include reliability, passenger comfort, maintainability, economy, technical performance, etc., among which the economic factor ranks first. Internationally, the economy of an aircraft is usually evaluated by direct operating cost (Direct Operation Cost, DOC). The operating cost of an aircraft refers to all expenses incurred by the operator during the use of the aircraft, including DOC and indirect operating costs (Indirect Operation Cost, IOC). Taking civil aircraft as an example, DOC mainly includes fuel costs, crew costs, take-off and landing and navigation costs, maintenance costs, insurance and rental costs, etc. Direct maintenance cost (Direct Maintenance Cost, DMC) is an important parameter reflect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 王勇徐志锋王莹蒋庆喜刘余王怀青
Owner AVIC SAC COMML AIRCRAFT
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