Exterior Dry Wash at Aosta Corrado Gex (LIMW)

What changes at Aosta Corrado Gex for a dry-wash turnaround?

Aosta sits at 1,791 feet in the Aosta valley with a single 1,499-metre runway; the largest aircraft ever operated here was a BAe 146, so detailing demand centres on light and midsize jets and turboprops. The alpine elevation means cold-soaked wings in winter and rapid temperature swings in spring and autumn—conditions that favour a dry wash over rinseless methods, since we apply no standing water that might refreeze in wheel wells or freeze onto control surfaces overnight.

AVDA operates the airport and staffs the operations office around the clock to support the regional alpine-rescue helicopter service, which flies 24/7/365 with two AW139. For a third-party detailing crew that H24 availability simplifies PPR filing and airside-pass requests, even outside published daytime hours. The field is not an airport of entry and customs are unavailable, so all aircraft arrive from Schengen origins or must clear elsewhere first.

Handling agents present at the airport coordinate ramp access; we bring our own lighting, GPU adapter leads and pitot covers, and we leave the stand clean of product residue. Winter operations—typically December through March—drive most business-aviation movements here, but positioning flights and crew-currency work continue year-round.

How do you manage airside access and handler coordination at LIMW?

We file our PPR through the AVDA operations office at least 48 hours before the scheduled wash, stating crew size, vehicle registration and estimated time on stand. Because Aosta is a compact alpine field with a single runway and shared apron space for rescue helicopters, scheduled traffic and transient business aircraft, the operations office assigns stand positions and issues airside-escort instructions case by case.

Our team leader holds an Italian airside pass valid across multiple airports; at LIMW we coordinate escort with the handling agent on duty or, for overnight or early-morning work, directly with the operations office. The handler expects us to carry third-party liability insurance, to notify them before moving any GPU or chocks, and to leave the stand free of overspray or product containers. We bring our own wheel chocks, pitot covers and static-port tape; if the aircraft is on continuous GPU we confirm with the handler that we may work around the lead without interrupting power.

Photo documentation begins before we touch the aircraft—wide shots of the stand, close-ups of any pre-existing paint chips or leading-edge damage—and continues through each stage of the wash. The final report goes to the captain or dispatcher by email within two hours of wheels-up.

What does the exterior dry-wash process include at Aosta?

We start with a walk-around alongside the captain or handling agent, noting any areas of concern—heavy bug strike on the radome, hydraulic weep-stains on the belly, exhaust soot around the APU outlet—and agreeing no-touch zones: pitot probes, static ports, angle-of-attack vanes and any unsealed avionics bays. The dry-wash product is a high-lubricity emulsion that lifts dirt into suspension without abrading the paint; we apply it panel by panel with microfibre applicators, allow thirty seconds of dwell time, then wipe to a clean finish with separate microfibre cloths.

The sequence runs nose to tail, top to bottom: radome and windscreens first, then upper fuselage and wings, nacelles and pylons, lower fuselage and belly, finally the empennage and winglets. Belly work and gear-bay degreasing happen with the aircraft on jacks or, more commonly, with a creeper and drop-cloths beneath the stand; we use a citrus degreaser for heavy hydraulic film and wipe everything twice to avoid streaking. Exterior windows receive a separate glass cleaner; lights are wiped but not polished unless the operator requests a brightwork upgrade.

Leading edges get light hand-polishing with a dedicated compound to remove bug residue without thinning the paint. We mask static ports and pitot tubes before any work near the nose and remove the tape only after final inspection. Duration ranges from three hours for a light jet with minimal soiling to eight hours for a super-midsize with a heavily soiled belly and nacelles.

When does recurring dry wash make sense at this alpine base?

Operators running ski-season shuttles—Geneva or Zurich to Aosta, two or three legs per day, December through March—see the fastest dirt accumulation: de-icing fluid residue on the belly, salt spray on the lower fuselage, exhaust soot on the tail cone. A dry wash every two weeks keeps the aircraft presentable and prevents hydraulic film from baking onto nacelle skins in the spring sun. For a fleet of two or three light jets we schedule a rolling programme: one aircraft every Thursday, rotating through the fleet so each airframe is washed fortnightly and no two are off-line the same day.

Single-aircraft operators—charter companies, fractional programmes, corporate flight departments—more often request one-off washes timed to coincide with overnight stops or longer layovers. We quote a fixed price for the scope of work and confirm the turnaround window; if the departure slot moves forward we adapt, but we do not begin a belly degrease if fewer than four hours remain before engine start.

Aosta's compact ramp and the priority given to rescue-helicopter operations mean we cannot always secure same-day access for unscheduled requests. Booking 48 hours ahead ensures the operations office can fit us into the apron-movement plan and the handler can arrange escort without delaying other traffic.

What do you document and what goes into the tech log?

Every exterior dry wash generates a written record: date, aircraft registration, arrival and departure times for our crew, products used, areas cleaned and any discrepancies observed. We photograph the aircraft before we start—wide shots from four corners, close-ups of the belly, nacelles and empennage—and again after completion, capturing the same angles so the operator can compare. If we find paint chips, corrosion bloom on brightwork, hydraulic leaks or loose fasteners we photograph them in situ, note the location by station number or panel designation, and include the images in the final report.

The tech-log entry is a single line: 'Exterior dry wash IAW operator spec, no defects introduced, aircraft released to service,' followed by our licence number, signature and timestamp. If the captain asks us to annotate an existing squawk—'hydraulic stain, left main gear door, monitored'—we reference the squawk number and add our observation. We do not open access panels, remove fairings or reset any circuit-breakers; if a discrepancy requires maintenance action we inform the captain and note it in the report, but we make no tech-log entry beyond the scope of the cleaning work.

The digital photo report—typically fifteen to twenty images with captions—goes by email to the address the operator provides, usually within two hours of our departure from the stand. Operators who run recurring programmes receive a summary every quarter showing wash dates, findings and any trends in paint or brightwork condition.

How do winter conditions and rescue-helicopter traffic shape the service at LIMW?

The alpine-rescue helicopters operate around the clock every day of the year, and their movements take precedence over all other traffic on the apron. If a call-out occurs while we are working on a stand adjacent to the helicopter parking, we stop, secure all loose materials and move our vehicle clear until the AW139 has departed. The AVDA operations office notifies us by radio; delays are usually ten to fifteen minutes, occasionally longer if a second sortie launches immediately.

Winter temperatures at 1,791 feet can drop well below freezing overnight, and cold-soaked airframes remain below zero even after sunrise. We do not begin a dry wash until the fuselage skin temperature reaches at least two degrees Celsius; applying waterless product to a frozen surface traps moisture beneath the film and can lead to paint adhesion problems when the aircraft climbs into warmer air. If the aircraft has been de-iced we wait an additional thirty minutes for residual Type I fluid to evaporate from the belly and gear doors before starting the degrease.

Spring and autumn bring rapid temperature swings—frost at dawn, fifteen degrees by midday—and afternoon thunderstorms that roll down the valley with little warning. We monitor the local METAR and coordinate with the operations office; if convective activity is forecast within our turnaround window we either start early or postpone to the next suitable weather day. The operator never pays for a wash we cannot complete safely.