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Method for calculating maintenance time interval of civil aircraft system

A technology of maintenance time and civil aircraft, which is applied in the aviation field and can solve the problems of high maintenance costs, loss of profits, and insufficient maintenance of airlines

Inactive Publication Date: 2013-04-03
AVIC SAC COMML AIRCRAFT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the industry practice for this task time interval is 800-1000FH, and this time interval appears to be insufficient for maintenance, causing higher maintenance costs or loss of profits to airlines

Method used

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  • Method for calculating maintenance time interval of civil aircraft system
  • Method for calculating maintenance time interval of civil aircraft system
  • Method for calculating maintenance time interval of civil aircraft system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] Example 1: In this example, the CRJ700 emergency light system of an aircraft in service is tested. The specific steps are as follows:

[0080] Step 1: Prepare the data

[0081] Including the names of important maintenance items, component names, descriptions of maintenance tasks, task categories, safety levels, mean time between failures, additional failures, mean time between failures, loss factors, task costs and failure costs, where the task category is this Common sense in the field, 5 categories are explicit safety categories, 6 categories are explicit operation categories, 7 categories are explicit economic categories, 8 categories are recessive security categories, and 9 categories are recessive non-security categories. For details, please refer to MSG-3 ,2009.1. The mean time between main failures, the mean time between additional failures, and the loss factor are all determined according to different component types, and they are all fixed values.

[0082] MSI (main...

Embodiment 2

[0145] Example 2: In this example, the present invention is applied to Bombardier's newly developed aircraft CSeries emergency light system, using CSeries direct maintenance cost analysis, maintainability analysis, reliability analysis and other data as input. The calculation method is the same as in embodiment 1, the difference lies in the specific parameter settings.

[0146] MSI (maintenance important item): emergency light system;

[0147] Select components: emergency lights and signs;

[0148] Task description: operability inspection of emergency light system;

[0149] Task category: 8;

[0150] Security level: Injury;

[0151] MTBF: 103018FH,

[0152] Additional invalidation: 1.0E+5;

[0153] Loss factor β: 1.0;

[0154] Task cost:

[0155] ●GSE:0;

[0156] ●Manpower hours: 0.15 hours

[0157] ●Materials / Consumables: 0

[0158] ●Execution number: 1

[0159] Invalidation fee

[0160] ●Repair cost: 460

[0161] ●Working hours: 0.3 hours

[0162] ●Flight delay: Yes, it caused a lo...

Embodiment 3

[0177] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the task category is the dominant category and the sixth category, for example:

[0178] MSI (maintenance important item): CRJ elevator;

[0179] Optional components: elevator control cable;

[0180] Task description: functional inspection of elevator control cables;

[0181] Task category: 6;

[0182] Security level: other;

[0183] MTBF: 30000;

[0184] Additional invalidation: not applicable;

[0185] Loss factor β: 2.2;

[0186] Task cost:

[0187] ●GSE:0;

[0188] ●Manpower hours: 4 hours

[0189] ●Materials / Consumables: 0

[0190] ●Execution number: 1

[0191] Invalidation fee

[0192] ●Repair cost: 500$

[0193] ●Working hours: 3 hours

[0194] ●Flight delay: No;

[0195] ●Flight cancellation: a loss of 30,000$;

[0196] ●Flying: No;

[0197] ●Time interval adjustment value: 5000

[0198] ●Materials / Consumables: 0;

[0199] ●Number of grounded days: 0.

[0200] ●Determine the total cost of the task C p =...

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Abstract

A method for calculating the maintenance time interval of a civil aircraft system belongs to the technical field of aviation. The method selects economy (cost / hour) as an optimization object, wherein as for safety tasks, two methods are used to calculate the time intervals of corresponding maintenance tasks, safety and economy are emphasized particularly, and the economy arithmetic recommended scope, safety threshold and product model regular checking target value are taken into comprehensive consideration to determine the task time interval. The method is economy-centered, is limited by safety and takes reliability as input idea, so as to recommend a reasonable maintenance time interval. A working group comprehensively takes supplier recommended value, engineering recommended value, history maintenance data, similar system part data, industrial experience point, the recommended value of the method and the like into consideration to make a decision, so that an optimum maintenance time interval judgment is made. The method is used for solving the problem that the civil aircraft cannot accurately judge the system part maintenance time interval due to the lack of a large number of service data during a maintenance review board report (MRBR) formulation process.

Description

Technical field [0001] The invention belongs to the field of aviation technology, and particularly relates to a method for calculating the maintenance time interval of a civil aircraft system. Background technique [0002] In the traditional "system analysis" process of civil aircraft, the determination of maintenance intervals is conservative, and the selection of each working group is often based on industry practices. Industry practices are mostly based on supplier recommendations, service data of the same or similar parts, engineering experience, etc. It is often only for a certain system or component itself, and is not completely compatible with the aircraft MSG-3 (Maintenance Steering Group—3rd Task Force) The integration of ideas means that the rationality of the aircraft is not considered from the perspective of the entire aircraft: what kind of impact the failure of the system will have on the aircraft; under various impacts, when will the maintenance cost the lowest cos...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 王勇徐志锋蒋庆喜王莹刘余
Owner AVIC SAC COMML AIRCRAFT
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