Optimal Replacement Policy of Jet Engine Modules from the Aircarrier's Point of View

  • Anita Domitrović
  • Ernest Bazijanac
  • Ivo Čala
Keywords: aircraft operation and maintenance, jet engine, dynamic programming, optimal replacement policy


A mathematical model for optimising preventive maintenanceof aircraft jet engine was developed by dynamic programming.Replacement planning for jet engine modules is regardedas a multistage decision process, while optimum modulereplacement is considered as a problem of equipment replacement.The goal of the optimal replacement policy of jet enginemodules is a defined series of decisions resulting in minimummaintenance costs. The model was programmed inC++ programming language and tested by using CFM56 jetengine data. The optimum maintenance strategy costs werecompared to costs of simpler experience-based maintenancestrategies. The results of the comparison j usti.JY further developmentand usage of the model in order to achieve significant costreduction for airline carriers.


Operating Economy of AEA Airlines, Summary Report,

Public Version, Association of European Airlines, December

Michaels, K.: Commercia/Aviation MRO in 2005: Market

analysis, Aircraft Technology Engineering and

Maintenance, April/May 2005.

Life Assessment of Hot Section Gas turbine Components,

Proceedings of a Conference Held at Heriot Watt University,

Edinburgh, UK, 5-7 October, 1999.

Kinnison, A. H.: Aviation Maintenance Management,

McGraw-Hill, USA, 2004.

Pro met- Traffic&Transportation, Vol. 20, 2008, No. 1, 1-9

Lufthansa Shop Visit Report, February, 2006.

Razumenic, S. Manic, A.: Odriavanje vazduhoplova,

Saobracajni fakultet Univerziteta u Beogradu, Beograd,

Nowlan, F. Stanley and Howard F. Heap: Reliability

Centred Maintenance, National Technical Information

Service, Washington, DC, 1978.

Jorgenson, D. W., McCall, J. J., Radner, R.: 'Optimal

Replacement Policy', The RAND Corporation, Santa

Monica, California, Rand McNally &Company -Chicago,

United States Air Force, Procedures for Determining

Aircraft Engine (Propulsion Unit) Failure Rates, Actuarial

Engine Live, and Forecasting Monthly Engine Changes

by the Actuarial Method, Technical Order, TO 00-25-

-128, October 20, 1959.

Nowlan, F. S.:An Evaluation of the Relationship between

Reliability, overhaul Periodicity and Economics in Case

of Aircraft Engines, presented at the National Aeronautical

Meeting, Society of Automotive Engineers, October

-14, 1960.

Jorgenson, D. W., McCall, J. J., Radner, R.: 'Optimal

Maintenance of Stochastically Failing Equipment', A

Report prepared for United States Air Force Project

RAND, R-437-PR, April1966.

Forbes A. James, eta!: Optimal Replacement Policy for

the F-15 Aircraft Engine Modules, Air Force Institute of

Technology, Wright -Patterson Air Force Base, Ohio,

August, 1975.

Kennet D. Mark: A Structural Model of Aircraft Engine

Maintenance, Journal of Applied Econometrics, Vol. 9,

-368, 1994.

Rust. J.: Optimal Replacement of GMC bus engines: an

empirical model of Harold Zurcher, Econometrica, 55,

No.5, September, 1987.

Wallace J. Hopp, Yar-Lin Kuo: An Optimal Structured

Policy for Maintenance of Partially Obse1vable Aircraft

Engine Components, Naval Research Logistics 45: 335-

-352, 1998.

Wallace J. Hopp, Yar-Lin Kuo: Hewistics for Multicomponent

Joint Replacement: Applications to Aircraft

Engine Maintenance, Naval Research Logistics 45: 435-

-458, 1998.

Kumar, U. Dinesh and Crocker, John: Maintainability

and Maintenance - A Case Study on Mission Critical

Aircraft and Engine Components, Chapter 17 of Case

Studies in Reliability and Maintenance, Edited by Wallace

R. Blischeke and D . N. Prabhakar Murthy, John

Wiley & Sons Publication, Hoboken, New Jersey, 2003.

Dubi, A.: Jet Engines: SPARTM And The Optimization of

Maintenance Strategies, Clockwork Group, February

Krcevinac, S., Cangalovic, M., Kovacevic-Vujcic, V.,

Martie, M., Vujosevic, M: Operaciona istraiivanja, Fakultet

organizacionih nauka, Beograd, Beograd, 2004.

Domitrovic, A.: Optimalizacija odriavanja pogonskog

sustava u ekspolatciji zrakoplova, doktorska disertacija,

Fakultet prometnih znanosti Sveucilista u Zagebu, Zagreb,

How to Cite
Domitrović A, Bazijanac E, Čala I. Optimal Replacement Policy of Jet Engine Modules from the Aircarrier’s Point of View. Promet - Traffic&Transportation. 1;20(1):1-.
Older issues

Most read articles by the same author(s)

1 2 > >>