The FAA, and CiES combined their expertise to enable the installation of FAA TSO fuel quantity systems into certain type certificated GA aircraft. Based on the success of our proven TSOA process and commercial success in OEM programs, the FAA is authorizing STC installation of the CiES digital fuel senders as a replacement for existing resistance based fuel quantity in GA aircraft.
This is similar STC to those found for electronic displays in aircraft. Pricing is per application but thee senders average $390 each location. These new manufacture digital senders are competitively priced against old technology rebuilt resistance senders.
CiES has a variety of outputs and configurations as we
can output a digital signal to:
Aerospace Logic - D series
JPI 930 / 960
EI CGR-30 & MVP-50
Or an analog signal to:
Aerospace Logic - Voltage
Contact CiES for interface with a standard analog gauge.
The cost for the STC is included in the sender kit price finalized shortly by CiES. The STC will be available
CiES Inc is the leading producer of fuel quantity systems for OEM GA aircraft and rotorcraft. With over 15,000 systems equipped all over the world. The FAA worked with CiES on obtaining this STC because of our proven success in the market. CiES’s product line spans from small aircraft and UAZV systems to Jet and turboprop aircraft the. The CC2840 Series digital sender is the second iteration of CiES patented digital fuel quantity technology, and is flown in thousands of aircraft installed and flown since 2012.
The STC allows for installation in
Cessna 170, 172, 175, 177, 180, 182, 185, 206, 207
Piper PA-23, PA-24, PA-28, PA-30, PA-31, PA-32, PA-34, PA-44
Beech 33,35,36,55, 58
More aircraft to follow. Your aircraft must have been equipped with a removable resistive or capacitive sender at time of manufacture to be eligible.
Original resistive aircraft fuel senders were designed to measure approx. 20 gallons and provide a resolution of 0.3 of a gallon between readings.. These resistive senders were intended for automotive and farm machinery applications. The aircraft application places additional stresses on these commercial products, from moisture born corrosion to large movements in fuel in and out of plane of the sender. Cies designed a aviation grade fuel sender from the outset. We addressed the moisture and corrosion issues, we addressed fuel motion in all axis and we designed a system to give excellent resolution less than (1/10 of a gallon) for fuel tanks that can hold hundreds of gallons of fuel.
A functional fuel gauge is required by regulation. While some in aviation cast a broad net on what working means, according to the FAA it means the ability to accurately show usable fuel in each tank. Gauges that waver or show merely a trend in operation are not functional. Fuel gauges are required as it takes the fundamental issue of pilot impression of starting fuel level out of the equation.
While even some in the FAA Flight Standards Offices quote this as verbatim truth, it is absolutely not true. CiES works with all of the FAA ACO offices and the FAA Small Aircraft directorate. Usable fuel is an accurate value for every certificated aircraft flying. So yes zero usable fuel is an accurate number, but so is full usable fuel (that value is on the fuel filler placard and in your POH). Using simple math 1/2 usable fuel is also an accurate number. The zero fuel accurate myth is just that, myth.
If you pair the CiES digital senders with a digital instrumentation, we typically see usable fuel remaining numbers within a gallon of a properly calibrated fuel totalizer in level flight still air. The CiES remaining fuel value will be more accurate the closer the fuel gauge gets to zero. Analog instrumentation and interface will give slightly less accuracy. Note: There are issues that are part of the aircraft fuel tank design such as sender overlap on multi sender fuel tanks or excessive restriction of fuel flow in a multi element tanks that cause fuel indication issues
The STC requires that the CC2840 Series digital fuel sender to replace the existing fuel level sender(s). The CC2840 Series digital fuel level requires aircraft power to operate. A protected power wire needs to be added from the aircraft electrical bus.
In most GA aircraft the sender is mounted to the tank structure in a standard 5 bolt pattern. We utilize this same pattern in our billet machined sender housings. In most fuel sender applications this is a bolt in replacement
Initially, this will depend on the installer’s rates and experience. The CC2840 series fuel sender was originally designed to be installed by aircraft manufacturers. Mechanics will be impressed by how easy it goes in.
STC installations ultimately require approval from an A&P with Inspection Authorization (IA), and will require an FAA form 337. Aircraft owners who work on their aircraft under the supervision and approval of an appropriately rated mechanic could apply this STC to their aircraft in that manner.
We are currently in production with the CC2840 Serioes digital fuel sender. The STC will be available for order from CIES @ Oshkosh Airventure 2016, with STC and product order fulfillment starting after the show. Orders of CiES products will be filled by CiES and its dealers in the weeks after Oshkosh.
They are the same product and have the similar capabilities. We re-purposed a jet fuel temperature output to allow a low fuel annunciation in the STC sender.
Typically, installing an CC2840 Series senders changes the aircraft weight less than the senders they are replacing
Does the CC2840 digital fuel sender TSO’d? Does CiES have PMA?
Yes. This STC demonstrates that are suitable for use in type certificated aircraft. This is the only TSO fuel sender available for retrofit in GA aircraft. The TSO insures quality fuel level reporting under all aircraft conditions and it insures that the product manufacturing has been accomplished in FAA approved quality system. TSO products do not require PMA.
What is the pedigree of the CiES CC2840 Series ?
CiES and Cirrus Aircraft, CiES launch partner successfully demonstrated that CiES aviation-proven manufacturing and development process yielded a superior product that is suitable for use in all type certificated aircraft. CiES is qualified to RTCA DO-254 and the digital fuel senders exposed to the aircraft environmental conditions for wing mounting by RTCA DO-160.