No operator desire any technical delay impacted on aircraft, since it could alter their flight schedule: additional cost and uneasiness among future passenger is inevitable. One such case is engine unable to start due to ignition plug(s) bad condition. Ignition plug, however, it's maintenance often left unscheduled until there are problems. Manufacturer may then issue Service Bulletin, telling operator how often an ignition plug must be inspected and/or replaced. But again, operator must have punctual justification to implement proper maintenance interval.
This where reliability engineering plays pivotal role determining maintenance interval, based on component life data (components age to failure, and components age which still remains in service). Life data analysis based on Weibull distribution fitting is then conducted, resulting in optimum inspection and scheduled replacement interval. The results also compared with manufacturer Service Bulletin, which deemed close enough with the recommendation. Resulting interval also conveniently match with current maintenance packaging interval: no special ground time is required.
Dito Wijanarko
Graduated from Electrical Power Engineering ITB. Joined GMF in 2015. Started as Development Engineer on TER-1 Reliability Management. Perform pivotal role as reliability engineer in Component Reliability Data Management for Garuda Indonesia and Citilink Fleet, Structure Reliability Program for Garuda Indonesia and Citilink Fleet, A320-200 Aircraft Reliability Management for Citilink Fleet.