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.
