700.72-A900509 (Revision 4) Replacement 880339 of the Fuel Pump Splined Coupling Engine 1 4000 Hrs 4000.0Hrs 10.00 880339 (890339) Engine 2 Alen SB BR700.72-A900509 (Revision 4) Replacement of the Fuel Pump Splined Coupling 4000 Hrs 4000.0Hrs 10.00 SB BR700-73-101833R2 - Introduction of a Re