41. Some systems use an engine oil pressure sensor instead. 42. There was an indication of low oil pressure , 43. Other problems included insufficient fuel and oil pressure at altitude due to problems with the pumps. 44. In a July 1991 flight, the right engine lost oil pressure after an oil line ruptured. 45. At one point during tests on May 10, the oil pressure dropped and testing was stopped. 46. On the return flight, the oil pressure had dropped to about half an hour after departure. 47. Lap 38 saw another retirement, that of Ren?Arnoux in the Surtees with oil pressure difficulties. 48. The problem with the auxiliary power generator centered around the unit's oil pressure during engine tests. 49. Quicker oil pressure response improves startup performance and thus contributes to an improvement in fuel economy. 50. Halfway through a checklist, Kosich exclaimed : " The engine turns but there's no oil pressure ."
