Q: Distance from ignition sources, buildings, vehicles, etc. while refueling? A: 50′.
Q: Distance from operating radar while refueling? A: 300′.
Q: Pressure re-fueling with or without power? A: With power and the FMCP in refuel auto the mains fill first then the externals in the following sequence – left outboard, left inboard, right. With power on in refuel stop flow on the mains are filled. Without power all tanks will be filled simultaneously.
Q: Single point / pressure refueling pressure limit? A: 55 PSI.
Q: Does the FMCP panel auto/manual switch effect refueling? A: No it is only used for transfer.
Q: Gravity refueling? A: To fill via gravity refueling the tanks are all filled seperately through their gravity port.
Q: High level sensors (float valves)/prechecks? A: Each tank has dual high level sensors that stop flow to that tank. The mains high level sensors are in the left tanks and can be tested manually at the refueling station or electronically using the switch on the FMCP (HIFR).
Q: HIFR equipment? A: HIFR equipment includes a HIFR coupling (for rig) with a wiggins fitting, a go/no go filter and a go/no go pressure differential gauge.
Q: HIFR refueling sequence? A: HIFR is essentially the same – a hot refueling or single point refueling with power.
Q: Transfer pumps and valves? A: There are two transfer pumps and two transfer valves. In auto transfer, the pumps and valves switch each transfer sequence. In manual transfer, both pumps and both valves operate simultaneously.
Q: Fuel transfer in auto mode? A: Each time the mains go below 2600 lbs. a transfer is initiated. The sequence continues until the aux tanks are empty.
Q: Securing auto or manual mode? A: The FMCP secures the transfer when either the mains are full, the aux tanks are empty, or the FMCP is set to stop flow.
Q: Transfer sequence? A: In auto pump A uses valve A. If flow is not detected in a specified amount of time pump A uses valve B. If flow is not detected in a specified amount of time pump B uses valve B. If flow is not detected the XFER FAIL caution will illuminate. If flow is obtained, a PUMP/VALVE FAIL caution will illuminate. Going to manual transfer opens both valves and both pumps. If this allows for a transfer following a XFER FAIL the problem could be a pump or valve issue, but it is likely a logic problem.
Q: BITE indicator? A: Located on the FMCP a white indications shows there has been a fault (a logic problem). – when you are offshore, it is nice to be able to quickly recognize the BITE indication and understand that it is simply a FMCP logic issue and fuel will transfer in manual.
Q: Transfer rate? A: 250-300 lbs. per min.
Q: Fuel weight and balance warning? A: Transfer from the left aux tanks with a full right 120 with empty aux tanks can put the helo out of CG limits.
Q: Caution about fuel transfer and 3200 lbs? A: Do not conduct an UNMONITORED fuel transfer until the mains are below 3200 lbs. This ensures the mains can receive all of the aux tank fuel. If the mains are above 3200 the pumps may continue to run causing damage to the pumps. – However, if you want to check the system before going offshore, you can did a MONITORED transfer check.
Q: Caution about a fuel split during refueling? A: If one of the main tanks is filling faster than the other, there may be a blocked vent. If the right is filling faster than the left (has the high-level shutoffs) secure fueling before the right reaches 1700 lbs.
Q: Note? A: Put the FMCP back in stop flow when complete with the transfer. If the FMCP logic fails, pump(s) may continue to run causing damage.
Q: Dump rate? A: 800 lbs. per min. (technique – instead of dumping gas down to the ideal weight you can check on/off switch at a fuel load that is higher than ideal to ensure the sump secures – starting the process of pulling circuit breakers at the weight you wanted to stop the fuel dump will likely result in an excessive amount of fuel being jettisoned).
Q: When is the fuel dump secured automatically? A: 270 in the left main and 210 in the right main.
Q: ALL STORES SONO? A: Pressing the all stores sono weight off wheels jettisons tanks with 272 lbs. or more (about 1/3rd or a 120).
Q: Select jettison? A: If you arm the system then press a button you can jettison individual tanks regardless of the amount of fuel (weight off wheels).
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