LOADING
Practical aviation fuel training — instruction, guided practice, practical assessment, competence decisions and certificates, with every module traceable to its source procedure.
Verify weekly that bonding, emergency stops, interlocks, couplings and filtration remain fit for service.
The source wording is unclear, misspelled or uses an unverified unit. The original is kept as it stands — an authorised person confirms the final wording before the module can be published.
BONDING WIRE ROTATION RESISTANCE TEST, < 25 OHMS CC
Procedure 2, line 19
Maximum 25 ohms, measured clip to clip.
Reason The source reads “< 25 OHMS CC”. The abbreviation CC is not defined — confirm what it refers to before publishing.
ACTIVATE & TEST EACH INDIVIDUAL INTERLOCK SEPERATELY
Procedure 2, line 32
Activate and test each individual interlock separately.
Reason Source wording is misspelled (“SEPERATELY”) — confirm the intended requirement.
ODJECTIVE TO ACHIEVE MAXIMUM POSSIBLE FLOW RATE AT LPM
Procedure 2, line 47
Objective: achieve the maximum possible flow rate, and record the flow in litres per minute.
Reason The source reads “ODJECTIVE TO ACHIEVE MAXIMUM POSSIBLE FLOW RATE AT LPM” — the flow rate value is missing and the wording is misspelled. Confirm the flow rate the reading must be taken at.
RECORD RECIRCULATION AND REASON INTO AVR AND ON VEHICLE LOGSHEET
Procedure 2, line 49
Record the recirculation and the reason on the vehicle logsheet.
Reason The source also names a record called “AVR”, which is not defined. Confirm what it refers to.
Position, PPE and equipment, manual handling, risk assessment and safety awareness
Why The preparation decides how safely everything that follows can be done.
Expected Correct position, correct PPE, equipment present, hazards identified.
If it fails Correct the position or fetch the missing equipment before continuing.
Source: procedure 2, line 13 — “VEHICLE POSITION”
Select the refuelling vehicle
The bonding system and the emergency stops are what protect the aircraft, the product and the people around the vehicle. A vehicle that fails either of these must not be used.
Bonding wire runs out fully, undamaged, secured to clip and reel
Why A wire that binds or is broken cannot carry the bonding current when it is needed.
Expected Full run-out without binding, no broken strands, clip and reel secure.
If it fails Do not use the vehicle. Place it out of service and raise a defect report.
Source: procedure 2, line 18 — “BONDING WIRE FULL RUNOUT, NO DAMAGE, SECURED TO CLIP & REEL”
Bonding wire rotation resistance
Why Above the limit the bonding path cannot dissipate static.
Expected 25 ohms or less, measured with the cable slowly wound onto the reel.
If it fails Fail the test — the system is defective and must be repaired before use.
Limit max 25 ohms
Source: procedure 2, line 19 — “BONDING WIRE ROTATION RESISTANCE TEST, < 25 OHMS CC”
Fuelling emergency stop shuts down the pump and prevents restart
Why It is the one control that stops a delivery going wrong.
Expected Pump stops and cannot be restarted until the stop is reset.
If it fails Place the vehicle out of service and raise a defect report.
Source: procedure 2, line 20 — “FUELLING EMERGENCY STOP, SHUTS DOWN PUMP, DISALLOWS RESTART”
Engine emergency stop shuts down the engine and prevents restart
Expected Engine stops and cannot be restarted until the stop is reset.
If it fails Place the vehicle out of service and raise a defect report.
Source: procedure 2, line 21 — “ENGINE EMERGENCY STOP, SHUTS DOWN ENGINE, DISALLOWS RESTART”
Vehicle oil, radiator and screenwash levels correct
Source: procedure 2, line 22 — “VEHICLE OIL, RADIATOR, SCREENWASH LEVELS”
Battery light operates on ignition
Source: procedure 2, line 23 — “BATTERY LIGHT OPERATES ON IGNITION”
Lights all working
Source: procedure 2, line 24 — “LIGHTS ALL WORKING”
Eye wash bottles present, undamaged, sealed and in date
Expected Sealed, undamaged and within the expiry date printed on the bottle.
Source: procedure 2, line 25 — “EYE WASH BOTTLES PRESENT, NOT DAMAGED, SEALED, EXPIRY DATE”
Underwing couplings left and right: not worn, damaged or leaking, and functioning
Why A worn coupling can leak or fail to seal against the aircraft adaptor.
If it fails Do not use the coupling. Raise a defect report.
Source: procedure 2, line 26 — “UNDERWING COUPLINGS L&R, NOT WORN, DAMAGED, LEAKING, FUNCTIONING”
Overwing nozzle undamaged and functioning, grade ID tag and sleeve markings correct
Why The grade markings are what stop the wrong product going into an aircraft.
Expected Nozzle undamaged, grade tag and sleeve markings legible and correct.
Source: procedure 2, line 27 — “OVERWING NOZZLE NOT DAMAGED. FUNCTIONING, GRADE ID TAG & SLEEVE MARKINGS”
The interlocks are critical safety devices: they make sure every piece of equipment is stowed before the vehicle can move.
Source: procedure 2, line 29 — “CRITICAL SAFETY DEVICES TO ENSURE EQUIPMENT STOWED BEFORE VEHICLE MOVES”
Current and replacement seal numbers recorded
Why The seal number is the evidence that the override has not been used unnoticed.
Source: procedure 2, line 30 — “RECORD CURRENT AND REPLACEMENT SEAL NUMBERS”
Each individual interlock identified and recorded
Source: procedure 2, line 31 — “IDENTIFY & RECORD EACH INDIVIDUAL INTERLOCK”
Each interlock activated and tested separately
Why Testing them together hides an interlock that does not operate.
Expected Every interlock tested on its own and the result recorded.
Source: procedure 2, line 32 — “ACTIVATE & TEST EACH INDIVIDUAL INTERLOCK SEPERATELY”
Amber light flashes and the drive-away test cuts the engine or applies the brakes
Expected Amber light flashes, and the engine cuts or the brakes apply on the drive-away attempt.
If it fails Stop. The vehicle must not be used — place it out of service and inform the supervisor.
Source: procedure 2, line 33 — “AMBER LIGHT FLASHES, DRIVEAWAY TEST-ENGINE CUTS OR BRAKES APPLIED”
Door open with the handbrake off sounds the alarm
Source: procedure 2, line 34 — “DOOR OPEN, HANDBRAKE OFF, ALARM SOUNDS”
The override exists for a fault, not for convenience. Breaking the seal must be recorded, and the system resealed as soon as the test is finished.
One interlock activated: amber flashes and the drive-away fails
Source: procedure 2, line 36 — “ACTIVATE ONE INTERLOCK, AMBER FLASHES, DRIVEAWAY FAILS”
Seal broken, override engaged: red and amber flash, drive-away attempted
Expected Both lights flash and the behaviour is exactly as the vehicle documentation states.
Source: procedure 2, line 37 — “BREAK SEAL, OVERIDE INTERLOCK SYSTEM, RED & AMBER FLASHES, ATTEMPT DRIVEAWAY”
Override deactivated, system resealed and drive-away attempted again
Why The vehicle must be left with the protection restored.
Expected System resealed with a new seal number recorded, protection back in operation.
Source: procedure 2, line 38 — “DEACTIVATE OVERRIDE INTERLOCK SYSTEM, RESEAL, ATTEMPT DRIVEAWAY”
Tested interlock deactivated
Source: procedure 2, line 39 — “DEACTIVATE TESTED INTERLOCK”
Flush an overwing hose that has not been used in the last seven days
Why Product standing in a hose is not representative and can be off specification.
Expected Twice the hose volume flushed, more than 200 litres.
Source: procedure 2, line 41 — “IF NOT USED IN LAST 7 DAYS FLUSH TWICE HOSE VOLUME >200LTS”
Volume flushed
Why Below twice the hose volume the sample still contains standing product.
Limit min 200 litres
Source: procedure 2, line 41 — “IF NOT USED IN LAST 7 DAYS FLUSH TWICE HOSE VOLUME >200LTS”
Appearance test result recorded: appearance, colour, water, sediment and volume
If it fails Repeat with a fresh sample. If it fails again, stop and inform the supervisor.
Source: procedure 2, line 42 — “RECORD APPEARANCE TEST RESULT: APPEARANCE, COLOUR, WATER, SEDIMENT, VOLUME.”
Sampling vessels on the receipt island used for flushing and testing
Source: procedure 2, line 43 — “USE SAMPLING VESSELS ON RECEIPT ISLAND FOR FLUSHING AND TESTING”
Differential pressure is the difference between the upstream and downstream side of the filter vessel. It indicates the condition of the filter elements inside.
Source: procedure 2, line 45 — “PRESSURE DIFFERENCE BETWEEN UPSTREAM AND DOWNSTREAM SIDE OF FILTER VESSEL”
Differential pressure at maximum achievable flow rate
Why The reading only means something at the highest flow the system can reach.
Source: procedure 2, line 47 — “ODJECTIVE TO ACHIEVE MAXIMUM POSSIBLE FLOW RATE AT LPM”
Flow rate at the time of the reading
Source: procedure 2, line 47 — “ODJECTIVE TO ACHIEVE MAXIMUM POSSIBLE FLOW RATE AT LPM”
With sufficient ullage, hoses connected for recirculation
Source: procedure 2, line 48 — “IF SUFFICIENT ULLAGE THEN CONNECT HOSES FOR RECIRCULATION”
Recirculation and the reason for it recorded on the vehicle logsheet
Source: procedure 2, line 49 — “RECORD RECIRCULATION AND REASON INTO AVR AND ON VEHICLE LOGSHEET”
Each ladder and set of steps identified and recorded
Source: procedure 2, line 51 — “IDENTIFY AND RECORD EACH LADDER/STEPS”
Damage, cracks, distortion, welds, joints, feet, wheels and platforms checked
If it fails Take the ladder or steps out of service and raise a defect report.
Source: procedure 2, line 52 — “CHECK DAMAGE, CRACKS, DISTORTION, WELDS, JOINTS, FEET, WHEELS, PLATFORMS”
With both valves closed and the system pressurised, no meter movement
Why Movement means product is passing the closed valves — the delivery would be measured wrongly.
Expected No meter movement while the system is held under pressure.
Source: procedure 2, line 54 — “WITH DOUBLE VALVES CLOSED, PRESSURE SYSTEM, CHECK FOR METER MOVEMENT”
Not required if a bleed valve is fitted and checked monthly.
Source: procedure 2, line 55 — “NOT REQUIRED IF BLEED VALVE FITTED AND CHECKED MONTHLY”
Weekly refuelling vehicle check recorded in the maintenance logbook
Expected Entry complete, legible and signed.
Source: procedure 2, line 57 — “COMPLETE WEEKLY REFUELLING VEHICLE CHECK FORM IN LOGBOOK”
What is the maximum allowable bonding continuity reading?
An overwing hose has not been used for nine days. What must happen before it is used?
During the drive-away test the vehicle does not cut out. What do you do?
Comments and praise
Trainer observation
Trainee acknowledgement
Assessor competence decision