Sesame Technologies FTC-EX-102A – EX Total Air Temperature (TAT) Sensor Cover

The FTC-EX-102A cover is specifically designed for the narrower “A” configuration total air temperature (TAT) sensors, ensuring a snug, secure fit that protects the sensor during ground operations. By contrast, the FTC-EX-102B version has a wider top section to accommodate the longer “B” style TAT sensor.

Using the correct configuration is essential to maintaining proper coverage, preventing sensor damage, and ensuring compliance with OEM specifications. Both covers are engineered with the same durable Sesame Technologies design, offering flame resistance, weather protection, and reliable performance for commercial and business aircraft.

The FTC-EX-102A is designed specifically for fuselage-mounted TAT sensors in the 102 configuration “A,” primarily from Collins Aerospace / Rosemount. It fits many jets across executive and commercial fleets, such as Challenger, Global, Learjet, Citation, and various others. Because it matches the “A” style sensor, operators need to confirm their aircraft has that exact sensor configuration for the correct fit.

The cover keeps contaminants out of the sensor housing by shielding the sensor from foreign object debris (FOD), extreme heat cycles, rain, and splashes. The built-in moisture drainage valve helps prevent water accumulation that could lead to corrosion or interfere with readings. Protecting the sensor in these ways helps maintain accurate TAT measurements over time.

The cover features a high-temp silicone cushioning liner that reduces the risk of burns or injury when the sensor is hot, especially during post-flight heat cycles. The shell’s anodized aluminum construction manages exposure to high temperatures while offering heat resistance. Also, the NAS1756-compliant warning streamer provides a visible “Remove Before Flight” alert to prevent the cover from being left on unintentionally.

Its shell is crafted from lightweight yet impact-resistant anodized aluminum, which stands up well to incidental knocks, weather, and repeated use. The silicone inner liner is designed to be non-melting and flexible, guarding against damage to both the sensor and the cover under heat and physical stress. The cover meets high quality standards (ISO 9001, AS9100D) to ensure consistency and durability.

The cover is made to fit snugly over the 102A TAT sensor, ensuring good contact and proper alignment. It includes attachment points for Sesame’s Safety Lanyard System, which helps prevent the cover from being lost during ground operations. The warning streamer also improves visual identification, so ground crews are reminded to remove it before takeoff.

The FTC-EX-102A has an integrated passive drain (vent/moisture drainage valve) to allow moisture to escape and prevent buildup. By letting water drain away, it helps avoid corrosion, mold, or other moisture-related issues at the sensor interface. This feature ensures that the sensor doesn’t suffer from water-induced degradation, preserving long-term reliability.

The anodized aluminum shell resists corrosion and impact, and the silicone liner withstands heat and non-melting stress. It’s engineered for exposure to jet blast, deicing chemicals, snow, rain, and high-temperature environments. Operators in variable climates or harsh ramp conditions will find it particularly helpful for reducing sensor wear and damage.

This cover is manufactured under ISO 9001 and AS9100D quality assurance systems, ensuring reliability and consistent build quality. It also meets 14 CFR Part 25.853 flammability requirements, meaning it’s flame-resistant and safe for use in aviation environments. The NAS1756-compliant warning streamer adds a layer of safety via visibility.

By protecting the TAT sensor from damage, debris, and overheating, this cover helps avoid unexpected sensor failures or replacements. The warning streamer and fitment help ensure removal before flight, which prevents incidents that could lead to refusals or regulatory problems. Over time, using a well-fitting protective cover like this reduces wear, saves parts costs, and reduces service downtime.

Yes. The design for the 102A sensor configuration makes it applicable across both executive (business jets) and commercial platforms that use the same sensor type. The materials and safety features (e.g, heat tolerance, durable shell, drainage, and warning streamer) are all of a standard that meets commercial ramp demands. This universality helps operators with mixed fleet types simplify their protective equipment.

Operators should verify the TAT sensor configuration on the aircraft (i.e., whether the sensor is configured as 102A or another variant) in the aircraft maintenance manual or sensor housing label. The cover is explicitly made for the 102A arrangement, so using the wrong configuration could result in a poor fit, ineffective protection, or damage. PJi provides aircraft compatibility info so you can check whether your plane is listed among those using the 102A configuration.