Reading the AAIB bulletin again
Which might be a good idea.
If the supply tank contents were "as designed", the low fuel 1 light, for the left supply tank , the smaller of the two supply tanks, would precede the other.
Which it isn't and the LOW FUEL lights will come on at approximately the same time as the sensors are the same distance vertically from the bottom of the tank. The No.2 SUPPLY TANK has less fuel remaining when the LOW FUEL activates as listed in the report.
For this helicopter build configuration, they indicate when there is approximately 32 kg and 28 kg of fuel remaining in the left and right supply tanks, respectively
Shy,
No reason to - SBC1 & SBC2 are closed when either EPU connected or at least ONE GENERATOR.
SHED EMER only operates when GEN DISCON 1 AND GEN DISCON 2 active.
I'm glad to read that. Whatever it means....
It means the same as in the report -
The SHED BUS switch at the rear of the overhead panel was found guarded in the NORM
position. The purpose of this switch is to give the pilot the ability to recover non-essential
electrical services should both generators trip off line, such as in a double engine failure.
Battery power is recovered to those systems when the guard is lifted and the switch set
to EMERG. In this case, with the switch set to NORM, the radio altimeter and the steerable
landing light would not have been available to the pilot. These two items are optional
equipment and are not standard on the EC135 helicopter. However, a radio altimeter is
required for UK police night flying operations, in accordance with Civil Aviation Publication
(CAP) 612, Police Air Operations Manual, Part One.