Exterior Dry Wash at Linz (LOWL)

How does waterless cleaning work on the Linz apron?

We bring all consumables, ladders and lighting to the aircraft stand. Aviation-grade waterless emulsion is applied panel by panel with low-lint microfibre, lifting contaminant into suspension; a second clean towel removes the emulsion and dissolved soil together. No pressure, no hose, no drain.

Bug residue on leading edges and nacelle inlets receives a dedicated pre-soak; belly panels and gear bays are degreased with a separate citrus-based cleaner that breaks down hydraulic film and carbon dust without attacking seals or composites. Exterior windows, position lights and the cheat line are finished last. The entire fuselage, wing and tail group are treated; we do not skip the roof or the top of the winglets.

Duration ranges from three hours for a super-midsize to eight hours for an ultra-long-range type. If the aircraft is cold-soaked after descent, we wait for surface temperature to stabilise above five degrees Celsius before applying chemistry; working cold risks streaking and incomplete emulsification.

What changes at Linz?

Linz sits at 980 feet elevation with a single 3,000-metre runway and lies 10.5 kilometres southwest of the city centre. The General Aviation Center operates a separate terminal and dedicated concrete apron; all business-aviation movements are coordinated through the GAC, which arranges passport and customs checks, refuelling and third-party services on a single booking.

Aerodrome administration and customs open Monday to Friday 05:30–23:00 local, Saturday and Sunday 06:00–23:00 local; outside these hours a night curfew applies. The airport closes completely at 23:00 and reopens the following morning. Any overnight detailing must be arranged in advance with the GAC and completed within operating hours, or requested as an exception—typically feasible only for AOG or charter-series work. LOWL is IATA Level 2, so formal slots are not required, but schedule requests still flow to Schedule Coordination Austria with a copy to the airport.

The field shares infrastructure with a military base south of the runway; expect security escorts airside and occasional fast-jet traffic. Continental climate means summer heat that bakes on bug residue and winter cold that thickens hydraulic film on the belly, so pre-soak dwell times adjust with the season.

What does the handler expect from a detailing crew at Linz?

Handling agents present at the airport require every third-party contractor to hold a valid airside pass or work under permanent escort. We carry Austrian airside credentials and public-liability insurance naming the airport operator; the GAC receives a copy of both documents with every booking confirmation.

The handler expects the detailing crew to report to the GAC desk on arrival, collect the escort if required, and confirm the stand number and GPU status before approaching the aircraft. If the captain or flight attendant is aboard, we request walk-around access and agree on no-touch zones—pitot probes, static ports, angle-of-attack vanes, any uncovered sensor. Cabin doors remain closed unless the crew explicitly opens them; we do not enter the aircraft or operate any hatch.

When work is complete, we return to the GAC office to countersign the service record and leave the photo package with the handler for onward transmission. If the next leg departs within the same operating day, timing is coordinated so that the aircraft is clean, dry and ready for pre-flight inspection at least thirty minutes before scheduled push-back.

Why does operational timing matter for a dry wash between legs?

Flight departments schedule exterior dry wash during a planned rest period—lunch stop, crew change, overnight RON—so the aircraft is clean for the next departure without delaying the rotation. At Linz the window is often narrow: a morning arrival may depart mid-afternoon, leaving four to five hours on the ground minus refuelling, catering and pre-flight.

We size the team to match the window. A super-midsize dry wash takes three hours with two technicians; a large-cabin or ultra-long-range type takes six to eight hours and requires three or four hands. If the slot tightens—weather delay inbound, passenger schedule change—we reduce scope to critical surfaces: fuselage sides, nose, wing leading edges and the visible belly, leaving the roof and gear bays for the next scheduled detail.

Coordination begins the moment we receive the booking: expected on-blocks time, estimated turnaround, any MEL or deferred-defect placard that restricts access, whether GPU or APU will be available. If the aircraft arrives early, the GAC calls us; if it arrives late, we adjust start time or defer to the next station. The goal is a clean aircraft on schedule, not a perfect aircraft late.

What goes into the documentation and photo report?

Every dry wash closes with a written record and a digital photo set. The written record lists aircraft registration, date, on-blocks and off-blocks time, services performed, products used, and any observation—paint chip, loose fastener, fluid leak—noted during the wash. The captain or handler countersigns the entry, and a copy goes into our file and theirs.

The photo report comprises time-stamped images taken before we touch the aircraft and after final buffing: nose, both profiles, tail, belly, each nacelle, leading edges, exterior windows. If we find pre-existing damage—scuffed paint below a door, a dent in a belly panel—we photograph it immediately and note it in the record, so there is no question later about when it occurred. The package is delivered to the GAC or emailed directly to the flight department within two hours of completion.

For fleet operators and charter companies, this documentation feeds into the appearance-management cycle: it shows that the wash was performed, that the aircraft was inspected, and that the next interval can be scheduled with confidence. It also satisfies any handler or FBO that wants proof of third-party activity on the ramp.

How do climate and season affect exterior dry wash at Linz?

Austria's continental climate swings from summer heat above thirty degrees to winter cold well below freezing. In summer, direct sun bakes bug residue onto leading edges and nacelle lips within hours; if the aircraft has flown through convective weather, the strike layer can include pollen, dust and organic acids that etch paint if left for days. We increase dwell time on the pre-soak and work in the shade when possible, or early morning before the apron heats.

In winter, hydraulic fluid and turbine oil thicken into a sticky film on the belly and inside the gear bays; frozen condensation can coat the fuselage after descent. We do not attempt a dry wash if the surface is iced or if air temperature is below zero—waterless emulsion will not emulsify properly, and wiping frozen contaminant risks scratching the clear coat. If the aircraft has been cold-soaked overnight, we wait for daytime warming or arrange heated-hangar access before starting work.

Spring and autumn bring rain and road spray from the apron, which leaves mineral spots on the lower fuselage and wheel wells. A dry wash removes these deposits, but if the aircraft will sit outside for several days we recommend a light spray-sealant top coat to keep rain from bonding to the paint. The goal is to match the service to the season, so the aircraft stays clean longer and the next interval can be extended.