A well-maintained exterior protects paint systems and resale value, whilst a clean cabin preserves OEM materials and passenger confidence. But the right schedule depends on aircraft category, mission profile, climate exposure and whether the jet sits outside or in a hangar. Here's how to build a practical detailing calendar.
Does aircraft size and category change the schedule?
Yes—larger aircraft accumulate more environmental deposits simply because of surface area, and they often fly longer legs through varied weather. A light jet flying short hops in central Europe may need only quarterly full details, whilst an ultra-long-range aircraft crossing the Atlantic weekly will benefit from monthly attention.
Typical baseline intervals by category:
- Light jets (Phenom 300, Citation CJ series): exterior wash every 4–6 weeks; full detail every 3–4 months
- Super-midsize (Challenger 350, Praetor 600): exterior wash every 3–4 weeks; full detail every 2–3 months
- Large-cabin and ultra-long-range (Global 7500, Gulfstream G650): exterior wash every 2–3 weeks; full detail every 6–8 weeks
- ACJ/BBJ: exterior wash every 2–3 weeks; full detail every 6–8 weeks, with cabin deep-clean quarterly
These are starting points. Real-world exposure matters more than MTOW alone.
How does mission profile affect detailing frequency?
Aircraft flying coastal routes or into airports with high industrial particulate—think London Stansted's cargo apron or Milan Malpensa's industrial surrounds—accumulate contaminants faster. Salt spray, volcanic ash from southern Italy, and de-icing fluid residue all degrade paint and sealant layers.
Charter operators turning aircraft every 48 hours often schedule a dry wash or rinseless clean between missions to maintain cabin appeal, then a full exterior detail monthly. Owner-flown jets with lower utilisation can extend intervals, but static aircraft still collect dust, bird strikes and UV damage. EASA Part-M requires operators to maintain airworthiness, and whilst detailing is not explicitly mandated, corrosion prevention is—meaning regular cleaning is a compliance issue, not just cosmetic.
What about hangar versus outdoor storage?
Hangared aircraft stay cleaner longer, but they are not immune. Dust settles on leading edges, and cabin interiors still see passenger traffic, galley spills and lavatory use. A hangared ultra-long-range jet might stretch exterior washes to every 6 weeks, but the cabin should still be detailed every 8–10 weeks to protect leather, veneer and carpet.
Outdoor storage accelerates everything. UV exposure degrades wax and sealant within 4–6 weeks, even in temperate climates. Rain leaves mineral deposits; morning dew promotes mould on seals. Aircraft on the apron at Farnborough or Luton through a British winter will need washing every 2–3 weeks and a protective sealant reapplication every 8 weeks to prevent oxidation. Gulfstream's maintenance manual recommends washing "as often as possible" for aircraft in corrosive environments, and Boeing's BBJ care guide specifies monthly washing minimum for outdoor storage.
Should I adjust the schedule seasonally?
Absolutely. Winter operations in northern Europe mean Type I and Type IV de-icing fluids, which are glycol-based and hygroscopic—they attract moisture and, if left on the airframe, can damage paint and corrode aluminium. ICAO Annex 6 requires removal of all holdover-time fluids before the next flight, but in practice, residue clings to nacelles, flap tracks and the undercarriage. A post-winter detail in March or April should include a full decon wash and inspection of brightwork.
Summer brings its own challenges: insect strikes on the leading edge and radome, tree pollen (especially across Germany and France in May–June), and higher UV index. A hydrophobic sealant applied in April will typically last 8–10 weeks; by July it may need refreshing. Operators flying into Mediterranean airports in summer should inspect for volcanic dust and salt haze monthly.
What about the cabin—does it follow the same schedule?
Not quite. Cabin detailing depends on passenger load and catering complexity. A six-seat owner configuration flown 100 hours per year may need only two deep cleans annually, whilst a 16-seat charter jet flying 400 hours will require quarterly attention to high-touch surfaces, galley deep-clean and lavatory sanitisation.
OEM cabin materials have specific care requirements. Dassault specifies pH-neutral cleaners for Falcon interiors; Bombardier's Global maintenance manual warns against ammonia-based products on veneer. Using the wrong chemistry voids material warranties. Leather should be conditioned every 3–4 months to prevent cracking, and carpets extracted (not just vacuumed) every 6 months to remove embedded particulate that acts as an abrasive.
How do I balance schedule with operational tempo?
The ideal schedule means nothing if the aircraft is never available. Work with your FBO to block 4–6 hours for a full exterior detail during planned downtime—overnight stops, pre-positioning legs, or maintenance windows. A rinseless wash can be done during a 90-minute turnaround if you coordinate with ground handlers for GPU and airside escort.
Some operators build detailing into their tech log as a recurring item, just like a 50-hour inspection. Others rely on the chief pilot's judgement. Either works, but calendar reminders prevent the "we'll do it next month" drift that leads to oxidation, staining and costly paint correction.
| Scenario | Exterior Wash | Full Detail | Cabin Deep-Clean |
|---|---|---|---|
| Hangared, low utilisation (<100 hrs/year) | Every 6–8 weeks | Every 4 months | Every 6 months |
| Outdoor, moderate use (200–300 hrs/year) | Every 3–4 weeks | Every 8–10 weeks | Every 3 months |
| Charter/high utilisation (>400 hrs/year) | Every 2 weeks | Every 6 weeks | Every 6–8 weeks |
| Coastal or winter ops | Every 2 weeks | Every 4–6 weeks | Every 3 months |
Terso works directly on the ramp across Europe, scheduling around your mission tempo—whether that's a pre-departure dry wash at Farnborough or a full detail during a maintenance slot in Milan. We bring our own water reclaim and no-touch avionics protocols, so you stay on schedule. More on our exterior detailing services.