DIFFERENCES BETWEEN JIG 4 ( FOR SMALLER AIRPORTS) AND JIG 1, JIG 2

DIFFERENCES BETWEEN JIG 4 ( FOR SMALLER AIRPORTS) AND JIG 1, JIG 2

Smaller airports are defined as follows:

Aviation fuel is supplied to the location by road or rail transport,  fuelling equipment has a maximum flow rate of 1000 litres/min per delivery hose, total number of fuelling operations per year is less than 10.000 and throuhgput is less than 10 million litres and if a hydrant is used for fuelling, it has a diameter of 150 mm (6’’) or less.

Differences:

Double block and bleed valves are not specified in JIG 4.

No monthly conductivity measurements. JIG 4 airports do not generally have conductivity meters on site. The product conductivity is checked regularly at all major airport operations in the same area with more frequent product receipts from the same supply locations.

Certification (3-yearly) for master meters, master pressure gauges and torque wrenches (5-yearly) is not required. JIG 4 airports are not equipped with this type of “certified” instruments/tools. These gauges and tools are used by third parties or by dedicated maintenance personnel during regular maintenance visits.

No routine filter membrane testing requirements.

Bulk meter calibration is required annually in JIG 4 versus 6-monthly in JIG 1 and 2. This is due to lower throughput and the requirement for a specialist third party contractor.

Fuelling equipment pressure/surge control tests are 6-monthly versus quarterly in JIG 1. This is due to lower fuelling rate and throughput, and the need for a trained maintenance technician to perform the test.

A single filter for both depot receipt and fueler loading may be used although the preferred option is separate inlet and outlet filters (FWS meeting EI 1581).

6-monthly serviceability checks of fuelling steps and ladders by maintenance personnel versus quarterly in JIG 1.

Piston filter/differential pressure gauges checked monthly versus 6-monthly in JIG 1 and 2. This increased frequency is to take account of the significant presence of Avgas at smaller airports and the risk of the piston sticking from lead precipitation.

No defueling at JIG 4 operations.

Separate sections cover the handling of aviation fuel in drums and fuelling from drums. This is not included in JIG 1 & 2.

A separate and updated section for helicopter fuelling. Not part of JIG 1.

Adoption of the JIG HSSE management system is not a requirement but there is a reference to the new JIG HSSEMS Standard and updated HSE guidance is given in JIG 4 Chapter 2 (Health, Safety, Security and Environment).

No 3-monthly requirements for hydrant valve chamber checks. JIG 4 only includes the procedures and checks required for small low pressure hydrant systems (see appendix A7). For large high pressure hydrant systems there is a reference to JIG 2 and EI 1560 in appendix A7.

The daily stock control requirement is the same but JIG 2 has, in addition, a monthly reporting requirement to a financial controller, etc. appropriate to larger operation.

The requirement for a yearly check of the tank high level alarms is the same for JIG 4 and JIG 2, but JIG 2 also includes a monthly function check as a best practice “should”.

The refueler overfill protection devices to be function tested 6-monthly in JIG 4 compared to 3- monthly in JIG 1. This is a task for a specialist maintenance technician. The annual wet test is the same.