Emergency Vision Assurance System (EVAS) provides a clear space of air through which a pilot can see flight instruments and out the front windshield for landing the plane in the event of in cockpit smoke.
When smoke evacuation procedures are not sufficient, EVAS® provides emergency backup allowing the pilot to see and fly the aircraft to a safe landing. Statistics from FAA Service Difficulty Reports clearly show that in-flight fires, smoke or fumes are some of the most significant causes of unscheduled or emergency landings and account for on average one precautionary landing per day.
A pilot encountering smoke in the cockpit so thick that the instruments cannot be seen can utilize a relatively simple device, which provides a clear view. Emergency Vision Assurance System (EVAS®) provides a clear space of air through which a pilot can see flight instruments and out the front windshield for landing. The pilot still relies on the oxygen mask for breathing, smoke goggles for eye protection and employs approved procedures for clearing smoke from the aircraft.
EVAS measures 3 x 8.5 x 10 inches when stowed, the approximate space of a Jeppessen navigation manual. When needed, the pilot removes the IVU (Inflatable Vision Unit) from the EVAS® case and pulls a tab to activate the system. The IVU inflates with one lobe above and one below the glareshield. According to VisionSafe Corporation, the distributor of EVAS®, the whole process takes 15-20 seconds. The pilot leans forward, placing his smoke goggles in contact with the EVAS® clear window, giving him an unimpaired view of both vital instruments and the outside world.
The device is independent of aircraft power, relying on a self-contained battery-power supply, pump and filters in each storage case. EVAS® systems are designed to run for at least two hours, and filter down to .01 microns. The system requires virtually no installation. While the FAA regulations require smoke detectors, fire extinguishers, smoke goggles and oxygen masks, pilots point out that these safeguards and all other systems and equipment for flight safety are useless if the pilots cannot see to control and land the aircraft.
VisionSafe Corporation uses a fleet of mobile cockpit demonstration units to show potential customers the benefits of the system. EVAS® demonstrations use a fog generator to reduce cockpit vision so the pilot cannot see his hand in front of his face. Smoke goggles offer no vision improvement, though they do protect the eyes. After EVAS® is deployed, the pilot can clearly see both the vital instruments and out through the windshield. It is truly an amazing experience.
Compact: 3" x 8.5" x 10"
(75mm x 215mm x 255mm)
Light weight: ~ 5.5Lbs (2.5KG)
15-20 second deployment time
Self-contained power supply
Easy to install
10 Year Warranty
Source of smoke has not been isolated?
Evacuation system can't keep up with the smoke being generated?
EVAS® is fully FAA tested and certified to ensure pilot vision in the presence of dense continuous smoke. With EVAS®, pilots are able to see the flight path and vital instruments as well as read approach plates and emergency procedures. The ability to perform these functions in an environment of continuous smoke will make a critical difference to safety.
In scores of simulator tests with EVAS®, pilots have landed safely with smoke in the cockpit so thick they could not see their hand in front of their face. Current aircraft design and certification criteria rely on smoke evacuation methods.
The test procedures for these methods measure the smoke clearing capacity against a "standard condition." That standard condition as defined in FAA Advisory Circular 25-9A states "to clear the cockpit of smoke after the pilot's view is obscured, without any further smoke being generated." What if the source of the smoke has not been isolated? Further, what if the evacuation system can't keep up with the smoke being generated?
The answer to these questions is EVAS®. It is the best way to ensure that the flight crew can maintain vision and safely control and land the aircraft when dense smoke in the cockpit cannot be stopped.
It is important to maintain your EVAS® unit. Maintenance information can be found in Chapter 2 of the manual received with your unit. For STC models (107STC), the manual is VSC Document 8017, Instructions for Continued Airworthiness. Links to manuals can be found below in PDF format.
The EVAS® warranty is void if systems are not serviced in accordance with required service periods.
EVAS® systems require regular service every 24 months. The service due date is clearly marked on each EVAS® unit.
120 months from the original manufacture date, the EVAS® system is rebuilt to the current configuration. This serves to renew the warranty period for an additional 10 years, and includes replacement of key system components.
A special inspection is required immediately after:
- The integrity of the EVAS® container has been compromised;
- Any test in which the "Battery Condition" status indicates "Inop" (red test light or no light);
- Any use or deployment of EVAS®;
- 13 or more months have passed from the Base Service Date on the EVAS®
EVAS® operators are required to perform regular inspections, to assure their units are in proper working order.
The owner, operator or designee shall visually check EVAS® for general condition, security, and position in the cockpit.
The EVAS® system must be given a blower and battery check to ensure proper battery voltage and blower motor operation. The span between checks should not exceed 90 days.
If EVAS® is deployed in an emergency, please contact VSC Quality Assurance Department as soon as practical at 1-800-441-9230. Complete the Pilot Smoke Event Report.
Special documents are required when shipping EVAS internationally.