loss of oil pressure
Dear Mat Tongkang,
One must understand that loss of oil pressure whether it is genuine of not, a shutdown is required. One cannot assume that the fault is spurious once the warning LOP light and pressure gauge confirmed it, even if the oil quantity is full. But one can keep the engine running if the oil pressure is good (and no LOP light) even the oil quantity indicated zero. I believe (this was many years ago, haven't flown the 73 since then), the checklist required us to check the oil press gauge also, not just the LOP light before shutting down the engine. It does not ask to check the oil quantity. Of course if the quantity is zero, and oil press is low and LOP light ON, it's a sure case due to loss of oil in the engine that cause the oil pressure to drop.
I may miss something here. Correct me if I'm wrong or my statement here is not accurate.