Since the Surabaya aircraft fuelling Incident in April 2010 there has been much discussion on how to avoid a repeat of the differential overpressure of the monitor elements that was a major contributory factor to the event. It is recognised that there are a number of proprietary monitoring systems available on the market to prevent differential overpressure, and this Bulletin does not preclude them being fitted. However, the following is a minimum requirement for equipment to be installed on all hydrant servicers that are operated to JIG Standards.
JIG Bulletin No. 58 (Jan 2013) – Hydrant Servicer Filter Monitor Vessels / Differential Pressure Switches