An airport ramp, a hangar and an aircraft maintenance shop expose the same crew to a long list of hazards in a single shift: auxiliary power units loud enough to damage hearing, moving tugs and belt loaders, jet fuel and hydraulic fluid on skin and in eyes, work on wings and stabilizers well above the floor, and paint and primer that contain chromates and isocyanates. No single rulebook covers all of it. This guide sets out what the rules require for each kind of equipment, where in an aviation operation it is needed, how to choose between the options, and how to use and maintain it.
Who sets the rules
Four sources overlap in aviation ground operations, and it helps to know which one is speaking.
| Source | Role | Examples in this guide |
|---|---|---|
| OSHA (29 CFR 1910) | Binding workplace rules for employers | Hearing conservation, eye and hand protection, fall protection, respirators, eyewash, first aid, lockout/tagout |
| FAA advisory circulars | Guidance for airports; mandatory for some federally funded projects | FOD management, construction safety, drone operations |
| Airport rules | Binding on everyone working at that airport | High-visibility vests on aprons |
| NFPA standards | Fire protection, adopted by fire codes | Fire extinguishers, fueling (see our aviation fire extinguisher guide) |
Consensus standards such as ANSI Z87.1 (eye protection) and ANSI/ISEA 107 (high-visibility apparel) become binding only where a regulation or an airport rule adopts them.
Equipment at a glance
| Work area | Main hazards | Equipment to plan for |
|---|---|---|
| Ramp and apron | APU and engine noise, vehicles, FOD, weather | Hearing protection, high-visibility apparel, safety glasses, gloves, FOD containers, cones |
| Fueling | Fuel splash and spills, fire | Goggles, nitrile gloves, eyewash, sorbents and spill kits, fire extinguishers |
| Hangar and line maintenance | Head strikes, falls from wings and stands, hydraulic fluid, stored energy | Bump caps or hard hats, fall protection, butyl gloves, eyewash, lockout/tagout devices |
| Paint and strip shop | Chromates, isocyanates, solvents, blast media | Respirators under a written program, chemical gloves, coveralls, eye protection |
| Battery charging and GSE shop | Electrolyte, hydrogen gas | Eyewash and flushing facilities, face shields, chemical gloves |
| Drone operations | Lithium battery fire | Battery inspection, fire protection for charging areas |
The sections below take each kind of equipment in turn.
Hearing protection
What the rule requires. OSHA's permissible exposure limit for noise is 90 dBA averaged over 8 hours, with the allowed time halving for every 5 dB increase: 4 hours at 95 dBA, 1 hour at 105 dBA, 15 minutes at 115 dBA. At 85 dBA averaged over 8 hours, the action level, the employer must run a hearing conservation program. That means noise monitoring, a baseline hearing test and annual hearing tests, annual training, and hearing protectors provided at no cost, with a choice of several suitable types.
Why it matters on the ramp. A NIOSH evaluation of ramp workers at Newark in 1999 measured regional-jet APUs at up to 120 dBA. None of the six workers sampled exceeded OSHA's 90 dBA limit, but five of the six exceeded the 85 dBA action level. That was one airport and one fleet, but it shows how quickly ramp work reaches the program threshold. Because ramp workers move between noise sources all shift, OSHA calls for personal sampling rather than area readings in this kind of work.
How to choose. In the same NIOSH study, earplugs and earmuffs brought ramp exposures down to roughly 78 to 82 dBA, while banded semi-insert protectors only reached 84 to 89 dBA. Banded protectors are convenient for workers who take them on and off often, but on the loudest tasks earplugs or earmuffs gave more protection. Protection must bring exposure below 90 dBA, or below 85 dBA for anyone whose hearing has already shifted.
How to use it. Foam earplugs only work when rolled down and fully inserted; OSHA requires the employer to train workers on fitting. Earmuffs lose their seal over safety glasses temple arms and hoods, so check the fit with the rest of the worker's gear on. Browse hearing protection, and see our guide to Noise Reduction Ratings for how protectors are rated.
High-visibility apparel
What the rules require. The FAA advisory circulars on airport ground vehicle operations and on construction safety do not set a clothing requirement. On the ramp, high-visibility apparel is required by the airport itself. Two examples:
- Minneapolis–St. Paul requires a Performance Class 2 vest or garment meeting ANSI/ISEA standards on any aircraft apron, within 25 feet of an airport roadway, and in active construction or maintenance areas. Narrow exceptions include public safety personnel and flight crew during preflight inspections.
- Fairbanks International requires an ANSI/ISEA 107-2015 Type R, Class 2 or Class 3 garment anywhere airside, worn as the outermost layer over cold-weather gear, and replaced when damaged or faded.
How to choose. ANSI/ISEA 107 sets minimum amounts of fluorescent background and retroreflective material by class.
| Type R class | Background material | Retroreflective material |
|---|---|---|
| Class 2 | 775 sq in (540 in the smallest size) | 201 sq in |
| Class 3 | 1,240 sq in (1,000 in the smallest size) | 310 sq in |
Class 3 carries more of both materials, so the wearer is visible from farther away and from more angles. Check your airport's rule for the minimum, then choose a garment that will be the outer layer in every season, including rain gear and winter jackets in high-visibility colors. Browse high-visibility vests and apparel and rainwear, and see our guide to ANSI/ISEA 107 classes.
Eye and face protection
What the rule requires. OSHA requires eye or face protection against flying particles, liquid chemicals and chemical vapors, with side protection wherever objects can fly. Devices must meet ANSI Z87.1, and workers who wear prescription glasses need protection that includes the prescription or fits over it.
What the fluids call for. Manufacturer safety data sheets set the level of protection for the fluids crews handle every day.
| Fluid | Eye protection on the safety data sheet | Other notes on the sheet |
|---|---|---|
| Jet A | Tightly fitting safety goggles, plus an eyewash bottle | Flammable; skin irritant; suspected carcinogen |
| Skydrol LD4 hydraulic fluid | Safety glasses with side shields, or goggles | Flush eyes for at least 15 minutes after contact; keep eye flushing systems and safety showers close to the work |
How to choose. Read the Z87.1 markings. Z87+ means impact-rated, which suits drilling, riveting and grinding. D3 means the eyewear protects against splashes and droplets, which is the marking to look for when handling fuel and hydraulic fluid. A face shield over goggles adds protection when pouring, decanting or breaking hydraulic lines under pressure. Browse safety glasses, safety goggles and face shields, and see our guide to Z87.1 markings.
Emergency eyewash and showers
What the rules require. Wherever eyes or body may be exposed to injurious corrosive materials, OSHA requires facilities for quick drenching or flushing within the work area. Battery charging areas for powered industrial trucks must have facilities for flushing and neutralizing spilled electrolyte. Charging areas for battery-electric tugs and belt loaders are the obvious place to apply it.
OSHA's rule has no numbers. Employers and inspectors look to ANSI Z358.1, summarized below from published summaries of the standard.
| ANSI Z358.1 criterion | Requirement |
|---|---|
| Location | Reachable within 10 seconds, on the same level as the hazard, with an unobstructed path |
| Eyewash flow | At least 0.4 gallons per minute for 15 minutes |
| Drench shower flow | 20 gallons per minute for 15 minutes |
| Water temperature | Tepid, 60 to 100°F |
| Valve | Opens in 1 second or less and stays open hands-free |
| Testing | Plumbed units activated weekly; all units inspected annually |
Where to put them. The Skydrol safety data sheet asks for eye flushing systems and safety showers close to the work, so hydraulic shops and line maintenance areas need one within that 10-second reach. Fueling operations and battery charging rooms are the other usual locations. The jet fuel safety data sheet lists an eyewash bottle, which is handy for immediate first rinsing on the ramp. Browse eyewash products.
Hand protection
What the rule requires. OSHA requires employers to select gloves for the actual hazard, including skin absorption of chemicals, cuts and abrasions, based on how the gloves perform against that hazard.
Glove material matters more than thickness. Aviation's two most common fluids need different gloves. In Ansell's published permeation tests:
| Fluid | Nitrile | Neoprene | Butyl | Natural rubber (latex) |
|---|---|---|---|---|
| Kerosene (a proxy for jet fuel) | Excellent, over 360 minutes | Excellent, 185 minutes | Good, 82 minutes | Not recommended |
| Skydrol 500B-4 | Not recommended | Not recommended | Excellent, over 480 minutes | Not recommended |
Nitrile is the right glove for fuel, but it is not recommended for phosphate-ester hydraulic fluids like Skydrol, where butyl performs best. Latex is not recommended for either. These results are for specific Ansell gloves, so check your own glove maker's chart before you buy. For sheet metal, rivets and composite edges, cut-resistant gloves are rated A1 to A9 under ANSI/ISEA 105. Browse chemical-resistant gloves and cut-resistant gloves, and see our guide to ANSI/ISEA 105 cut levels.
Head protection
What the rule requires. OSHA requires a protective helmet meeting ANSI Z89.1 wherever there is a potential for head injury from falling objects, and an electrically rated helmet near exposed electrical conductors.
Bump cap or hard hat. Hangar crews strike their heads on flap tracks, wing trailing edges and gear doors far more often than anything falls on them, which is what bump caps are for. A bump cap is not a hard hat. Ergodyne's own instructions for its bump caps say they do not protect against falling or thrown objects and must not be used in place of an ANSI Z89 helmet. Where tools or parts could fall from a stand or wing above, or during engine changes and other hoist work, a Z89.1 hard hat is required.
| Z89.1 rating | Meaning |
|---|---|
| Type I | Protects against impact to the top of the head |
| Type II | Protects against top and side impact |
| Class G | Tested to 2,200 volts |
| Class E | Tested to 20,000 volts |
| Class C | No electrical protection |
Browse head protection.
Fall protection
What the rule requires. OSHA's general industry rule requires protection for anyone on a walking-working surface with an unprotected edge 4 feet or more above a lower level. The protection can be guardrails, a safety net, or a personal fall protection system. OSHA defines a walking-working surface as any surface on or through which an employee walks, works or gains access to a work area, which is how the tops of wings and fuselages are generally treated. We found no OSHA interpretation written specifically about aircraft surfaces.
How to choose. Maintenance stands with guardrails are the first choice wherever they fit the aircraft. Where they don't, a personal fall arrest system must meet these limits:
| Personal fall arrest criterion | OSHA limit |
|---|---|
| Lanyards, lifelines, D-rings, snaphooks, carabiners | At least 5,000 lb strength |
| Anchorage | Supports 5,000 lb per attached worker |
| Maximum arresting force | 1,800 lb |
| Free fall | No more than 6 ft, without striking a lower level |
| Deceleration distance | No more than 3.5 ft |
The anchorage is usually the hard part in a hangar: an overhead rail or a mobile anchor that can be positioned over the aircraft. Fall arrest anchorages must be independent of anything used to suspend workers or platforms. Browse fall protection and rescue.
Respiratory protection
What the rule requires. Wherever respirators are required, OSHA requires a written respiratory protection program with a trained administrator. The program must include medical evaluation, fit testing before first use and at least annually, training, and procedures for cleaning, storage and maintenance. Respirators must be NIOSH-certified. Voluntary use of filtering facepieces alone does not require the full program.
Aircraft painting and stripping. Two kinds of coating chemicals drive respirator use in aircraft paint shops.
| Hazard | OSHA limit | Aviation-specific note |
|---|---|---|
| Hexavalent chromium (chromate primers) | 5 µg/m³ over 8 hours; action level 2.5 µg/m³ | Where aircraft or large aircraft parts are painted, engineering controls need only reach 25 µg/m³, and respirators must cover the rest |
| MDI and TDI isocyanates | Ceiling of 0.02 ppm, never to be exceeded | HDI, common in aircraft topcoats, has no specific federal limit, which makes the respirator program and booth ventilation more important |
Spray booths must draw at least 100 feet per minute of air across the open face, and spray exhaust air must not be recirculated. Media blast stripping requires NIOSH-approved abrasive-blasting respirators for the operator. For jet fuel exposures, the safety data sheet calls for a NIOSH-approved organic vapor respirator, or supplied air where levels are unknown. Browse respiratory protection, coveralls and suits, and our guide to NIOSH filter classes.
Spill response
What the rules require. Federal spill prevention rules (SPCC) apply to facilities with more than 1,320 gallons of aboveground oil storage, counting only containers of 55 gallons or more. Fuel in an aircraft's own tanks is excluded, but a refueler truck stores and transfers fuel for distribution, so it does not get that exclusion. Confirm your facility's status with whoever prepares your SPCC plan. Fueling spill procedures under NFPA 407 are covered in our aviation fire extinguisher guide.
How to choose sorbents. For fuel and oil spills, sorbents need to attract oil and repel water. Oil-only sorbents do this, so they float and keep working on a wet ramp. Universal sorbents absorb both water-based and petroleum fluids, which suits hangar floors and mixed spills. Check with the fluid maker before relying on any sorbent for phosphate-ester hydraulic fluid. Browse spill kits and pads, rolls and booms, and see our guide to choosing the right sorbent.
FOD control and ramp marking
What the FAA recommends. The FAA's foreign object debris advisory circular, AC 150/5210-24A, asks maintenance crews to account for every hand tool and every nut, bolt, washer and length of safety wire. It recommends shadow boards, cut-out tool tray liners and spill-proof tote bags or toolboxes. FOD containers should be closed rather than open, secured against wind, placed at every gate and in hangars and maintenance areas, emptied often, and marked to say hazardous materials may not be deposited. Personnel can carry waist pouches for FOD they pick up on the move.
Cones and barricades. For construction and maintenance areas near aircraft, the FAA's construction safety circular calls for orange cones, red lights and low, collapsible barricades with orange and white stripes. Barricades next to aprons and safety areas must be no more than 18 inches high and weighted so jet blast cannot move them, and the red lights no more than 10 feet apart. Browse traffic and site safety and storage and containers.
Lockout/tagout
OSHA's lockout/tagout standard covers the servicing and maintenance of machines and equipment where unexpected start-up or release of stored energy could injure someone. It exempts cord-and-plug equipment when unplugging removes the hazard and the plug stays under the servicing worker's control, which can apply to small carts and tools. We found no OSHA interpretation applying the standard specifically to aircraft hydraulics, flight controls or ground power, so many shops follow it as best practice for those systems. Browse lockout/tagout, and see our guide to OSHA 1910.147.
First aid
Where no clinic or hospital is in near proximity, OSHA requires a person trained in first aid and adequate first aid supplies readily available. OSHA's appendix points to ANSI Z308.1 for kit contents. Class B kits contain everything in Class A in larger quantities, plus a splint and a tourniquet. Kit types run from Type I (stationary indoor) to Type IV (portable, for outdoor and mobile work), so ramp vehicles and remote parking areas suit Type III or IV kits. Browse first aid kits and stations.
Fire protection
Fire extinguisher requirements on ramps, fuel trucks, hangars and maintenance areas are covered in detail in our aviation fire extinguisher guide. The short version: no ABC dry chemical near aircraft fueling, a wheeled unit rated at least 80-B at each gate or stand, and clean agent units where residue would damage avionics. Browse aviation fire extinguishers.
Drone operators and lithium batteries
The FAA's guidance for small unmanned aircraft warns that lithium batteries are highly flammable and can ignite from short circuits, improper charging, heat, crash damage or defects. It tells remote pilots to follow the battery maker's handling and charging instructions, and to treat a bulging battery case as a sign of impending failure. Diminishing flight time can also signal a failing battery. The FAA guidance gives no specific storage or charging requirements, so follow the battery maker's instructions and keep charging areas clear of combustibles with suitable fire protection nearby.
Common mistakes
- Using nitrile gloves for Skydrol. Nitrile suits fuel, but permeation data rate it not recommended for phosphate-ester hydraulic fluid. Use butyl.
- Treating a bump cap as a hard hat. It protects against striking fixed objects, not against falling ones.
- Relying on banded hearing protectors near APUs. In NIOSH's ramp study they left exposure close to the action level.
- Assuming the FAA sets the vest rule. Your airport does, and the class it requires varies.
- Leaving the eyewash out of reach. It must be reachable within about 10 seconds of the hazard, not down the hall.
References
- 29 CFR 1910.95 (occupational noise), 1910.107 (spray finishing), 1910.133 (eye and face protection), 1910.134 (respiratory protection), 1910.135 (head protection), 1910.138 (hand protection), 1910.140 and 1910.28 (fall protection), 1910.147 (lockout/tagout), 1910.151 (first aid and eyewash), 1910.178(g) (battery charging), 1910.1000 Table Z-1 and 1910.1026 (hexavalent chromium).
- 40 CFR 112.1 and 112.2, spill prevention, control and countermeasure (SPCC).
- NIOSH Health Hazard Evaluation HETA 99-0060-2766, Continental Express Airlines, Newark, 1999.
- FAA AC 150/5210-24A, Airport Foreign Object Debris Management (2024); AC 150/5370-2G, Operational Safety on Airports During Construction; AC 150/5210-20A, Ground Vehicle Operations; AC 107-2A, Small Unmanned Aircraft Systems.
- Minneapolis–St. Paul International Airport field rule on high-visibility vests (2025); Fairbanks International Airport Operations Order 2.6.
- 3M, ANSI/ISEA 107-2020 Made Easier; ANSI summaries of Z87.1-2020 and Z308.1-2021; published summaries of ANSI Z358.1-2014 (ISHN, Lab Manager, Haws).
- Ansell Chemical Resistance Guide, 8th edition.
- Safety data sheets: Jet A (Chevron Phillips Chemical); Skydrol LD4 and 500B-4 (Eastman).
- Ergodyne Skullerz bump cap user instructions.
This guide is educational. Requirements vary by employer, airport and jurisdiction, and selection and compliance remain the employer's responsibility. Confirm requirements with your safety manager, airport authority and equipment manufacturers.
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