Charter operators face constant pressure to turn aircraft quickly whilst maintaining cabin hygiene standards that reassure passengers and meet contractual obligations. Electrostatic disinfection has become the industry standard for rapid, thorough coverage, but product choice, dwell time and crew coordination determine whether the process adds ten minutes or an hour to your slot.
Which disinfectants are approved for aircraft cabin materials?
Not every hospital-grade disinfectant is safe for aircraft interiors. OEM guidance from Airbus, Boeing, Bombardier, Dassault, Embraer and Gulfstream restricts certain chemistries because they attack sealants, degrade leather or leave residues on polycarbonate windows.
The safest categories for regular use:
- Quaternary ammonium compounds (quats) at ≤0.3% concentration – effective against enveloped viruses, low material risk, short dwell times (typically 1–3 minutes)
- Hydrogen peroxide solutions at ≤3% – broad-spectrum, residue-free evaporation, but some OEMs restrict use on certain leathers and require immediate wipe-down
- Isopropyl alcohol at 70% – fast-acting, safe on hard surfaces and most fabrics, but can dry leather and must not contact acrylic windows or polycarbonate
Boeing's Cabin Cleaning and Disinfection Recommendations (D6-54446) explicitly prohibits bleach, ammonia and phenolic disinfectants on all interior surfaces. Gulfstream's Product Maintenance Manual similarly restricts oxidising agents on anodised aluminium and composite panels. Always cross-reference the Safety Data Sheet (SDS) against your airframe's maintenance manual before introducing a new product into the cabin.
How does electrostatic spraying work, and why do charter operators prefer it?
Electrostatic applicators charge disinfectant droplets as they leave the nozzle, typically at 5–15 microns. The positively charged mist is attracted to grounded surfaces—seats, armrests, bulkheads, galleys—wrapping around contours and coating undersides that manual wiping misses.
Key advantages for quick turnarounds:
- Coverage speed: a super-midsize cabin (8–10 seats) can be misted in under five minutes
- Uniform film thickness: electrostatic attraction ensures consistent coating without pooling or drips
- Reduced labour: one technician with a cordless sprayer replaces two or three with cloths
- Verifiable contact: the charged droplets visibly cling to surfaces, confirming coverage
Victory Innovations and EMist are the dominant suppliers to the aviation sector; both offer battery-powered backpack units that eliminate the need for a GPU or APU connection. The FAA's Safetyalert for Operators (SAFO) 20009 acknowledged electrostatic disinfection as an acceptable method provided the product is compatible with aircraft materials and dwell time is observed.
What dwell time is required, and how does it affect turnaround?
Dwell time—the period the disinfectant must remain wet on the surface to achieve the claimed kill rate—is non-negotiable. Rushing this step voids efficacy and exposes the operator to liability if an outbreak is traced to the aircraft.
Typical dwell times for aviation-approved products:
| Product type | Dwell time | Wipe required? |
|---|---|---|
| Quat (0.125–0.3%) | 1–3 minutes | Optional on non-food contact |
| Hydrogen peroxide (0.5–3%) | 1–5 minutes | Yes, on leather and soft goods |
| Isopropyl alcohol (70%) | 30 seconds–1 minute | No, evaporates |
In practice, a 30-minute turnaround allows:
- 5 minutes to mist the cabin
- 3 minutes dwell (for a fast-acting quat)
- 5 minutes to wipe high-touch surfaces (armrests, tray tables, lavatory fixtures)
- 17 minutes for galley restock, waste removal and final checks
Cold-soaked cabins in winter extend dwell times because low temperatures slow evaporation and chemical activity. If the aircraft has been on the apron overnight in sub-zero conditions, pre-heat the cabin to at least 10°C before disinfection to ensure the product performs as labelled.
Do we need to disinfect between every leg, or only on deep cleans?
Regulatory bodies do not mandate disinfection frequency for Part 135 or CAT operations, but contractual obligations, passenger expectations and risk management drive the schedule.
Common industry practice:
- High-touch surfaces (armrests, seat controls, lavatory handles, galley counters) wiped with disinfectant between every leg
- Full cabin misting after each day of multi-leg flying or whenever a passenger reports illness
- Deep disinfection (including carpets, curtains, headliners) during scheduled overnight or weekly detail
Some charter management companies include "enhanced cleaning" as a standard line item in contracts, particularly for VVIP or medical repatriation flights. The tech log or journey log should record disinfection events with product name, batch number and technician initials to demonstrate due diligence.
Can disinfectants damage avionics, sensors or composite surfaces?
Yes, if applied carelessly. Electrostatic mist drifts, and overspray can migrate into cockpit vents, static ports or pitot tubes if the applicator is used near the flight deck or with doors open on the apron.
No-touch zones:
- Cockpit instruments and MFDs: moisture ingress voids warranties; mask or close the cockpit door during cabin misting
- Static ports and pitot probes: even a thin film can cause erroneous airspeed or altitude readings; always fit covers before any wet process
- Composite fairings and radomes: some hydrogen peroxide formulations etch gelcoat; consult the OEM's Structural Repair Manual (SRM) before use
- Galley ovens and espresso machines: disinfectant residues can contaminate food or damage heating elements; wipe, do not spray
The European Union Aviation Safety Agency (EASA) issued Safety Information Bulletin 2020-02 reminding operators that cleaning and disinfection procedures must not compromise airworthiness. If a product is not listed in the aircraft maintenance manual, obtain written approval from the OEM or the design approval holder before use.
How do we coordinate disinfection with fuelling, catering and slot times?
Disinfection competes for the same apron time as refuelling, galley restock and passenger boarding. Poor sequencing creates bottlenecks, delays pushback or forces the crew to choose between hygiene and schedule.
Optimal sequence for a 45-minute turnaround:
- Passengers disembark; cabin crew remove waste and soiled linen (5 minutes)
- Refuelling begins (can run concurrently with cleaning if the disinfectant is non-flammable and the FBO permits it)
- Electrostatic misting of cabin (5 minutes)
- Dwell time observed; meanwhile, exterior walk-around and tyre inspection (3 minutes)
- Wipe high-touch surfaces; catering loads galley (10 minutes)
- Final cabin check, passenger boarding (remaining time)
Communication with the handling agent and FBO is critical. If the disinfectant's SDS lists a flashpoint below 60°C (as isopropyl alcohol does), some airports prohibit application during hot refuelling. Confirm the FBO's ramp procedures before the aircraft arrives.
Terso coordinates cabin disinfection within your turnaround window, using OEM-approved quats or hydrogen peroxide solutions and electrostatic application where the apron layout permits. We liaise directly with your handling agent to sequence the work around refuelling, catering and slot times. Details at /services/cabin-disinfection.
Sources
- Boeing Cabin Cleaning and Disinfection Recommendations D6-54446
- FAA Safety Alert for Operators (SAFO) 20009: Cleaning and Disinfection of Aircraft
- EASA Safety Information Bulletin 2020-02: Aircraft Cleaning and Disinfection
- Victory Innovations Electrostatic Sprayers for Aviation
- Gulfstream Product Support: Approved Cleaning Products