REPAIR: GEnx-1B/-2B HPT Stage 1 Shroud Hanger Modification Improves Fuel Efficiency
Benefit: The Service Bulletin (SBs 72-0159 and 72-0140 - Cooling Hole Modification) is a product improvement which introduces the GEnx-1B/-2B/P2 configuration that improves the fuel efficiency of both GEnx engine models. Description: These Service Bulletins rework high-pressure turbine (HPT) Stage 1...
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