A couple of follow up questions about the Engine Fuel Leak NNC for the NG. We are still pursuing our ETOPs certification, and the topic of the fuel leak over the water came up at last week's meeting with the poohbahs. Given that the NNC gives the following (one or more) as evidence of a fuel leak:
- Visual observation of fuel spray from strut/engine
- Excessive fuel flow
- Total fuel quantity decreasing at an abnormal rate
- Fuel IMBAL indication
- USING RSV FUEL message
- INSUFFICIENT FUEL message
- CHECK FMC FUEL QUANTITY message
Question: When does the CHECK FMC FUEL QUANTITY message pop up. i.e. what criteria activate it. Is it a didfference between PROG page fuel qty and the digital fuel quantity of XXX kilos?
Question: For non ETOPs operations, we use the RSV field of the PERF INIT page to put in ALT + 30 MIN RSV fuel. So, this might be 3000 kilos or so. For ETOPS operations, we plann to land with FOD of 5000 kilos or so. Ergo, if you're getting the USING RSV FUEL message, you are well into the fuel leak. Are there any operators who put in a high amount on the RSV field of the PERF INIT to get this message sooner?