PPE PPE on the Ramp: Hearing, Eyes, Hands, and Feet The gear that keeps line techs working for years, not just for a shift. NEW TOW Towing and Wing Walkers: Ramp Basics That Prevent Damage Slow, planned, and watched from every side: towing done the boring way. NEW FOD FOD Walks: Why, When, and How A bolt on the ramp is cheap. The damage it can do isn't. NEW PERF Why Crews Care About Every Pound of Fuel The number on your ticket goes into the crew's numbers. Here's why it should be right. NEW CLR Fuel Colors: What 100LL Blue and Jet A Straw Tell You Color is a quick first look, not a test. Here's what it can and can't tell you. NEW SELF Running a Self-Serve 100LL Pump: The Checks Behind It Nobody from the line is there when a pilot fuels, so the checks happen before they arrive. NEW RACK Loading a Fuel Truck at the Rack: Checks Before and After Right product, right truck, and eyes on the load the whole time. NEW TURN The Quick Turn: Line Service Habits Crews Remember Meet the airplane, ask once, and have the numbers ready. LIVE SPIL A Fuel Spill on the Ramp: The First Few Minutes Stop it, clear it, call it: the order that matters when fuel hits the ground. LIVE PLOT Why Line Service Wants the Pilot There for Fueling A second set of eyes on the grade, the quantity, and the airplane. LIVE MICR Microbial Growth in Fuel Tanks: Signs, Causes, and Prevention No water, no growth: what to watch for and why sumping is the real defense. LIVE FARM The Fuel Farm Daily Check: A Walkthrough A walk around the tanks, item by item, and what each check is looking for. LIVE UL Unleaded Avgas on the Ramp: What Line Service Should Know New grades, the same red nozzle, and why the grade check matters more than ever. LIVE COA What's on a Certificate of Analysis, and What to Do With It Refinery certificate, certificate of analysis, release paperwork: what each one is and how to use it. LIVE RAMP Gloves, Glare, and Cold Fingers: Using a Phone on the Ramp Bright sun, cold hands, and a battery that quits at the worst time. LIVE FBO How Small FBOs Win More Transient Traffic Accurate listings, quick turns, and the small things crews remember. LIVE AUDT Getting Ready for a Fuel Quality Audit Who shows up, what they check, and how to find your own gaps first. LIVE TRNG Training a New Line Tech: A First-Month Checklist What to cover in a new hire's first month, and how to know it actually stuck. LIVE PHOT How to Photograph a Fuel Sample So It Proves Something A clean jar, the right light, and the label in the frame: photos that settle questions. LIVE DP Filter Differential Pressure: The Daily Number Worth Trending One gauge, read every day, and what the trend says that a single reading can't. LIVE INTL Liters, Kilograms, and Gallons: Fueling International Crews Three units, two kinds of gallon, and a ticket nobody can misread. LIVE BOND Bonding During Fueling: Static Electricity on the Ramp Where the charge comes from, why the cable goes on first, and why it comes off last. LIVE LBS Fuel Orders in Pounds: A Quick Guide for New Line Techs Total or add, pounds or kilos, and how to say the order back before you pump. LIVE SAF Sustainable Aviation Fuel at the FBO: What Changes for Line Service Why a certified SAF blend arrives as Jet A, and the paperwork that proves it. LIVE TRCK The Fuel Truck Daily Check: What to Look For and Why The walkaround before the first fueling, item by item, and what each check protects against. LIVE DMTR Density Meter or Glass Hydrometer? What Changes on the Ramp Two instruments, two units, one fuel: how the readings line up. LIVE H2O Water in Jet Fuel: Sumps, Drains, and Clear and Bright Dissolved, free, and in between, and what a sample jar can and can't tell you. LIVE HYDR Hydrometer and Thermometer Care: Keeping Readings Honest The glass behind every gravity check, and how a small error in it shows up on the ticket. LIVE INV Fuel Inventory Reconciliation: Why Gallons Seem to Disappear Book versus stick, and why a tank can come up short without losing a drop. LIVE JETA Jet A vs Jet A-1: What Line Service Should Know The one real difference between the two grades, and why crews need to know which one they got. LIVE NET Gross Gallons vs Net Gallons: What Your Meter Is Counting Why a delivery ticket shows two gallon figures, and how to keep them from fighting each other. LIVE WNTR Winter at the FBO: Heavier Gallons, Water, and Icing Inhibitor Heavier gallons, water in the sumps, icing inhibitor, and static in dry air. LIVE DENS Why Crews Ask for the Fuel's Density: Uplift Checks Explained What an uplift check is, and how to give crews a density they can use. LIVE MISF Preventing Misfueling: Keeping Jet A Out of Piston Engines The nozzle, the order, the decal, and the airplanes that break the rules of thumb. LIVE RECV Checking a Fuel Delivery: Corrected API Gravity Against the Ticket The paperwork, a clear-and-bright sample, and the gravity at 60°F compared with the ticket. LIVE WGHT How Much Does Jet A Weigh per Gallon? (And 100LL) About 6.7 and 6.0 pounds, and why the meter temperature changes an uplift. LIVE LOGS Fuel Quality Records for Line Service: What to Log and How to Keep It Raw readings, tanks, photos, and exports an auditor can read. LIVE PRICE AvGrav Is Now $0.99 Down from $3.99. Every feature, one purchase, no subscription. LIVE CONV API Gravity to Specific Gravity and Density: Formulas and Table Convert API, SG, kg/m³, kg/L, and pounds per gallon, with a worked Jet A example. LIVE API How to Correct API Gravity to 60°F: A Fueler's Guide to Hydrometer Readings Why readings are corrected to 60°F, how to take a clean hydrometer reading, and how to tell if a Jet A, 100LL, or diesel sample looks right. LIVE LNCH AvGrav Launches: A Modern API Fuel Gravity Calculator for the Ramp Built for fuelers, technicians, and FBO operations: instant corrected API gravity, photo documentation, and a hands-free Apple Watch app. LIVE