GE turbines ‘simplify onboard maintenance’

GE Aviation's gas turbines can easily be repaired in-situ Photo: GE Aviation GE Aviation's gas turbines can easily be repaired in-situ Photo: GE Aviation

US company GE Aviation’s review of historical repair data has demonstrated that its marine gas turbines simplify onboard maintenance, saving navies millions of dollars.

The casing design on its LM2500 and LM6000 family uses hinges and braces to allow the whole compressor casing to be easily opened, making an in-place repair more likely.

“To better understand how our unique split casing design has prevented hundreds of gas turbine removals from ships, GE reviewed historical maintenance and repair data from three naval customers,” said GE’s vice president and general manager, Brien Bolsinger.

“We determined that thanks to GE’s easy-open split case design that allows for onboard intermediate level repair and maintenance, the United States Navy saved approximately US$45 to US$90 million in 2017 alone; and the Royal Canadian and Royal Australian Navies save US$4 to US$9 million each per year.”

In-place split casing repairs typically cost less than US$100,000 and work can be performed in two to three days. However, not all repairs can be made in situ meaning that some repairs can take many months and the typical cost may rise to up to US$3m.

Repairing an engine in place is particularly important on single gas turbine propulsion ships, which do not have redundancy, and whose availability would be significantly affected if an engine removal was required.

The split casing design simplifies repair actions such as foreign and domestic object damage and allows for preventative maintenance including inspections and component upgrades.

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