Exterior Dry Wash at Oberpfaffenhofen (Sonderflughafen) (EDMO)

Why does waterless cleaning suit Oberpfaffenhofen's operational profile?

Oberpfaffenhofen is a Sonderflughafen—a special-category airport serving the aerospace industry and qualified business aviation only. There is no scheduled traffic, no charter ops in the conventional sense, and no cargo movements. Every business flight needs PPR, and the field hosts major MRO tenants including General Atomics AeroTec Systems and an Aero-Dienst maintenance station. Aircraft often sit in maintenance hangars rather than cycling through quick turnarounds, which means detailing work frequently happens around extended ground time rather than tight slots.

Dry wash is the natural fit: no wash bay is required, no water infrastructure, no runoff to manage on the apron. We bring the chemistry and the labour to the stand, whether the aircraft is parked outside the handling terminal or positioned near a maintenance hangar. The process leaves no standing water and no environmental footprint, which matters on a field where every operation is scrutinised under the Sonderflughafen rules. For flight departments scheduling maintenance at EDMO, exterior cleaning can be folded into the downtime without adding logistical complexity or requiring aircraft movement to a separate wash facility.

What changes at Oberpfaffenhofen (Sonderflughafen) for a detailing crew?

Oberpfaffenhofen sits at 1,947 feet elevation, 22 kilometres west of Munich city centre, with a single runway—04/22, 2,286 metres. The handling agent present at the airport is TRIWO Airport Services, the operator's own handling service. Because this is a PPR-only field with strict MTOM limits—business flights are restricted to aircraft between two and twenty-five tonnes, with exemptions granted only for specific heavy types in the Global, Falcon and Gulfstream series—the mix skews toward large-cabin jets that have been individually cleared rather than a broad spread of light and midsize equipment.

For a detailing crew, that means most aircraft will be at the upper end of the size and complexity spectrum: longer fuselages, more window area, more nacelle and belly surface to degrease. Turnaround times are rarely rushed. The MRO presence means many aircraft are cold-soaked after sitting overnight or longer in unheated hangars, and exterior surfaces may carry condensation or frost depending on season. We plan tool staging and product warming accordingly. Airside access follows the same PPR discipline as flight ops: every third-party crew needs an escort or an airside pass arranged through the handler, and we coordinate timing with TRIWO to avoid conflicts with maintenance movements or test flights from the resident shops.

How does Munich's climate affect the exterior between washes?

Munich's continental climate delivers cold winters, warm summers and year-round humidity swings. Winter temperatures regularly drop below freezing, and while Oberpfaffenhofen has no curfew listed in operational data, early-morning and late-evening departures mean aircraft often sit on the ramp overnight, accumulating frost, road-salt drift from the autobahn network west of the field, and de-icing fluid residue during the Type I and Type IV season.

Spring and summer bring insect activity—midges and moths are drawn to the apron lighting, and bug strikes on leading edges, nacelle inlets and windscreens are routine after any flight below ten thousand feet. Exhaust soot from APU runs during maintenance ground tests adds a grey film to the belly and aft fuselage, and hydraulic misting from gear-swing checks leaves oily streaks on the gear doors and nacelle undersides. Dry wash removes all of this without introducing water that might freeze in panel gaps or seep into static ports during cold snaps. The waterless chemistry is formulated to cut through both organic residue and petroleum films, and the process leaves a light hydrophobic layer that sheds morning dew and delays the next round of soiling.

What do handlers and MRO shops expect from a third-party detailing crew at EDMO?

TRIWO and the maintenance stations on the field expect the same discipline from detailing crews that they expect from line technicians: clear communication, no surprises, and no interference with scheduled movements or hangar work. We file a ramp-work notification with the handler before every job, listing aircraft registration, stand location, estimated start and finish times, and the names of the crew members who will be airside. If the aircraft is inside a hangar undergoing maintenance, we coordinate with the shop supervisor to ensure our work does not overlap with panel access, gear swings or engine runs.

Oberpfaffenhofen's Sonderflughafen status means every person airside is accounted for. We carry photographic ID, display high-visibility vests, and follow the handler's escort protocols if we do not hold a long-term airside pass for EDMO. Tools and product containers are staged on drop-cloths to prevent FOD, and we police the stand before we leave—no rags, no spray bottles, no fastener hardware left behind. The MRO shops appreciate that we use no-touch methods around avionics bays, pitot probes and static ports, and that we flag any paint damage, corrosion or loose fasteners we find during the wash. It is a small field, and reputation travels fast.

Does recurring dry-wash work make sense for jets based at Oberpfaffenhofen?

Many of the business jets moving through EDMO are not 'based' here in the traditional sense—they arrive for scheduled maintenance, avionics upgrades or paint correction at the on-field shops, then return to their home base elsewhere in Europe. But for flight departments that do use Oberpfaffenhofen as a regular maintenance station—particularly those operating Globals, Falcons or Gulfstreams under the heavy-type exemption—recurring exterior care during each maintenance visit keeps the aircraft ahead of corrosion and reduces the interval between full details.

A dry wash every two to four weeks is the standard recommendation for aircraft in regular service, but at EDMO the rhythm often aligns with maintenance cycles rather than flight hours: a wash on arrival before the aircraft enters the hangar, and another wash on departure after all panel work is closed out and before the ferry flight home. This approach ensures the exterior is clean for pre-buy inspections, lease returns or owner visits, and it gives the maintenance crew a clean surface to work against when they are checking for fluid leaks, paint lifting or fastener play. For fleets that rotate multiple airframes through EDMO for heavy checks, we can schedule detailing around the shop's throughput so that every aircraft leaves the field looking correct.

What does the belly and gear degreasing involve on a dry wash at this airport?

Belly and gear degreasing is often the most labour-intensive part of a dry wash at Oberpfaffenhofen, because the aircraft mix skews toward long-range jets with complex gear assemblies and large nacelle undersides. Hydraulic fluid misting from gear retraction tests, oil seepage from APU drains, and exhaust carbon from ground runs all accumulate on the belly skin, gear doors, and the aft pressure bulkhead area. Left alone, this film attracts dust and forms a baked-on layer that eventually requires a full decon and polish to remove.

We use a two-step process: a degreasing pre-spray formulated for aviation hydraulics and turbine oils, followed by agitation with microfibre bonnets and a waterless finishing wipe. The chemistry breaks down the petroleum films without attacking sealant beads or anodised gear components, and the no-rinse formula means we do not need a wash bay or a GPU-powered pressure washer. Leading edges, nacelle lips and the nose cone get the same treatment if they carry bug residue or exhaust staining. The result is a clean belly and gear bay that the next maintenance crew can inspect without wiping down panels first, and an exterior that sheds water and contaminants more effectively until the next wash cycle.