S-MAX Aviation Stair Climbing Chair, Portable PRM Boarding Chair for Airport and Aircraft Passenger Transport
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The S-MAX Aviation Portable Stair Climbing Chair is the safe, comfortable, and reliable way to board and deplane passengers with limited mobility. It is purpose built for airlines, airports, ground handlers, and FBOs that need a dependable PRM (Persons with Reduced Mobility) boarding solution that works on standard aircraft stairs without specialized infrastructure.
With a compact 18.4 inch frame, the S-MAX navigates the narrow aisles of regional jets, narrow body aircraft, and air stair vehicles where bulkier boarding chairs simply will not fit. Automatic safety brakes engage on every step, integrated LED lighting illuminates dim stairwells and jet bridges for nighttime and early morning operations, and the ComfortStep system minimizes jolting on every stride. The result is a passenger who stays seated securely and comfortably throughout the entire boarding or deplaning sequence.
Engineered for high volume operations, the S-MAX supports passengers up to 350 lbs (160 kg) with a 440 lb (200 kg) total permissible weight. The 24V, 275W DC motor delivers continuously adjustable climbing speed from 8 to 23 steps per minute, letting the operator match pace to passenger comfort and stair conditions. The gas tight 2 x 12V, 3.3 Ah battery pack is IATA Special Provision A67 and DOT compliant for air travel, is not classified as dangerous goods, and can be repositioned across your route network without restrictions.
A Safety Chip immobilizer prevents unauthorized use, the single operator hand control eliminates the multi staff transfers required by traditional boarding chairs, and the rugged IPX4 rated build stands up to ramp, gate, and tarmac environments. Toggleable Single Step Mode gives operators precise step by step control during training or sensitive boardings, while the LED battery indicator and audible low battery warning keep the operator informed at all times. The S-MAX is independently pressure tested and certified by Berlin Cert GmbH at the Technical University of Berlin (Test Report P 08 166 MP) and meets ISO 7176 15 dimensional standards for mobility devices, giving your safety, compliance, and accessibility teams the documentation they need.
Unlike traditional aviation boarding chairs that demand two or three staff members and multiple passenger transfers, the S-MAX lets a single trained operator board a passenger directly from the gate or jet bridge to the aircraft seat. The result is reduced staff strain, shorter boarding times, fewer turnaround delays, and a dramatically improved experience for every passenger with reduced mobility. Backed by 2 year manufacturer warranty, the S-MAX Aviation Chair is the long term answer to FAA, ACAA, and EU 1107/2006 PRM assistance obligations.
- 350 lb. Passenger Capacity
- 18.4" Narrow Aisle Frame
- Automatic Brakes on Every Step
- ComfortStep Smooth Ride
- Integrated LED Lighting
- IATA Compliant Battery
Product Specifications
| Total Permissible Weight: | 440 lbs (200 kg) |
|---|---|
| Maximum Person Weight: | 350 lbs (160 kg) |
| Own Weight, Climbing Unit: | 74.1 lbs (33.6 kg) |
| Own Weight, Handle Unit: | 7.5 lbs (3.4 kg) |
| Own Weight, Battery Pack: | 6.8 lbs (3.1 kg) |
| Total Weight Without Battery: | 81.6 lbs (37 kg) |
| Total Width: | 18.4 in (468 mm) |
| Total Length, Min: | 41.4 in (1051 mm) |
| Total Length, Max: | 46.6 in (1184 mm) |
| Seat Width: | 15.0 in (380 mm) |
| Seat Depth: | 13.4 in (340 mm) |
| Seat Height at Front Edge: | 20.0 in (507 mm) |
| Seat Angle: | 6° |
| Backrest Height: | 24.2 in (615 mm) |
| Backrest Angle: | 16° |
| Distance Between Footrest and Seat: | 13.9 in (352 mm) |
| Footrest to Seat Angle: | 0° |
| Minimum Turning Radius: | approx. 39.4 in (1000 mm) |
| Minimum Platform Size: | 53.1 in x 53.1 in (1350 mm x 1350 mm) |
| Min. Outer Radius (Spiral Staircases): | 53.1 in (1350 mm) |
| Maximum Step Height: | 8.9 in (225 mm) |
| Minimum Step Depth: | 5.5 in (140 mm) |
| Maximum Stair Slope: | 61.2° |
| Required Step Width: | S-MAX total width plus 3.9 in (100 mm) |
|---|---|
| Climbing Speed: | 8 to 23 steps per min (continuously adjustable) |
| Batteries: | 2 x 12V, 3.3 Ah gas tight (lead) |
| Battery Charging Time: | approx. 8 hours |
| Trickle Charge Mode: | Yes |
| Motor: | 24V, 275W DC |
| Switching and Direct Operating Forces (UP/DOWN): | 3 to 8 N |
| Sound Pressure Level: | less than 70 dB |
| Vibration (Weighted RMS to Upper Body): | less than 2.5 m/s² |
| IP Protection Class: | IPX4 |
| Operating Temperature, Device: | minus 25°C to plus 50°C |
| Storage Temperature, Device: | minus 40°C to plus 65°C |
| Operating Temperature, Battery: | minus 25°C to plus 50°C |
| Storage Temperature, Battery: | minus 25°C to plus 65°C |
| Battery Charging Temperature: | 0°C to plus 40°C |
| Altitude Application Range: | less than 3000 m above sea level |
| Standards: | ISO 7176 15 dimensional compliance |
| Independent Certification: | Berlin Cert GmbH at TU Berlin, Pressure Distribution Report P 08 166 MP |
| Battery Air Travel Status: | IATA Special Provision A67 and DOT compliant, not classified as dangerous goods |
| Safety Systems: | Automatic safety brakes (every step), Safety Chip immobilizer, ComfortStep (toggleable), Single Step Mode (toggleable), LED battery indicator, audible low battery warning, integrated LED stairway lighting |
| Recommended Service Interval: | Technical safety test every 2 years by manufacturer or authorized specialist dealer |
| Unit Material: | Aluminum |