TGH Aviation offers aircraft component repair on the following Convair Models. Below is a list of the most commonly requested repairs and does not eliminate capabilities on other instruments used in this make of aircraft. If you need an instrument repaired that is not listed below, please call our Sales Department at 1 (800) 843-4976.
The phenomenal ways of an engineer’s mind facilitates the growth of man…
Here at TGH Aviation, we enjoy it when our employees build life-time careers with us. George Quirk started with TGH Aviation in October, in the year of 2000. Since 2007, he has served as Chief Inspector for TGH’s FAA Repair Station. He has equipped TGH with the knowledge and know-how to deliver excellent quality and an extensive capabilities list. His tenacity keeps our team of engineers and repair techs keen and driven to deliver the best service we can provide. We appreciate George and all he does for TGH and our team. Way to go George! You’re an A+ TGH Team Member!
TGH Aviation offers aircraft component repair on the following Beechcraft Models. Below is a list of the most commonly requested repairs and does not eliminate capabilities on other instruments used in this make of aircraft. If you need an instrument repaired that is not listed below, please call our Sales Department at 1 (800) 843-4976.
| AIRCRAFT | P/N | MFG | NOMENCLATURE |
| BEECHCRAFT KING AIR 200 | 4000B-10 | EDO | DG |
| BEECHCRAFT KING AIR 350 | 1U367-207-8 | SIGMA TEK | GYROSCOPE |
| BEECHCRAFT KING AIR 350 | 1U367-232-2 | SIGMA TEK | GYROSCOPE |
| BEECHCRAFT KING AIR 90 | 200-5 | AIM | DIRECTIONAL GYRO |
| BEECHCRAFT KING AIR 90 | 90-380009-7 | GULL | FUEL FLOW TRANSMITTER |
| BEECHCRAFT KING AIR 90 | 5000B-10 | EDO | GYROSCOPE |
TGH Aviation offers aircraft component repair on the following Bell Helicopter Models. Below is a list of the most commonly requested and does not eliminate capabilities on other instruments used in this make of aircraft. If you have an instrument not listed below, please call our Sales Department at 1 (800) 843-4976.
It takes a lot of dedication from our team to ensure that we always have the part you need. TGH Aviation is always looking for Cores to add to our Overhaul Exchange Inventory. We offer Cash for a variety of repairable cores. Check out our online list of the Most Frequently Purchased Cores here to see if you have a core we would be interested in, or call our Sales Department at 1 (800) 843-4976.
You can also submit a list of possible cores for cash by emailing us today. We will review your submissions and let you know which cores we would be interested in adding to our inventory.
We look forward to working with you to get these much needed instruments, overhauled, repaired and on the shelf, ready-to-ship for our customers. We look forward to hearing from you soon!
TGH Aviation Celebrates 60 Year Anniversary
Auburn, CA, March 30th, 2017
TGH Aviation, one of the most trusted and respected Part 145 Repair Stations in the industry, this year celebrates its 60th anniversary. TGH Aviation takes pride in its humble beginnings and appreciates the loyalty and dedication of both customers and employees throughout the past six decades. The company will commemorate the occasion with a number of customer appreciation specials and anniversary promotions throughout the year.
In 1957 founder Emery “Claude” Oxley Senior set out with a vision to specialize in the repair of gyroscopes for General Aviation aircraft. Claude originally began working out of his home in Riverside, California before his son Emery moved the business to a small wooden building in Auburn, California and joined forces with Chief Engineer, Rich Anderson. The early years were critical to the long term success of The Gyro House, now known as TGH Aviation. The founders built a strong infrastructure for the future by developing the TGH Aviation reputation as a top quality aircraft instrument repair facility with superior customer service.
Over the course of the last 60 years, TGH Aviation has vastly expanded its capabilities beyond gyroscopes, evolving into a diverse aircraft instrument repair facility that has become known world-wide. TGH Aviation now offers over 20,000 service capabilities, including the repair of primary flight instruments, avionics, aural warning systems, fuel flow transmitters, and their related indicators and refueling sensors. Today TGH Aviation is a valued supplier to the United States Department of Defense, NATO and a world-wide network of aviation maintenance facilities and parts brokers while still maintaining its legacy customer base of General Aviation pilots.
TGH Aviation provides outright sales, exchange sales, avionic installations and upgrades, repair services, and holds distributorships for most of the major manufacturers of the aforementioned product lines. The company’s repair shop customer base spans all areas of the industry from general aviation, corporate aviation and commercial aviation. The customer base includes airlines, parts brokers and maintenance facilities on five continents.
The past 60 years have been a hugely successful time for TGH Aviation, which now consists of a fully operational repair station, fuel lab, online pilot supply store and an avionics hangar. A veteran-owned company, TGH Aviation employs forward-thinking, growth-oriented management and all employees work to build the company reputation while improving industry presence and stature. The company is delighted to have become a part of the local community and to have had the pleasure of working with and meeting many people over the years and look forward to continuing to build on these strong relationships in the future.
As TGH Aviation looks to the next 60 years the mission continues to be to provide customers with high quality products, overhauls and repairs, all delivered with premiere customer service. As one of the most trusted and respected Part 145 Repair Stations in the industry today, TGH Aviation strives to create a great customer experience each and every time.
For a complete list of capabilities, go to www.tghaviation.com for more information.
Pitot Static System…Airspeed Calculation
A. Airspeed Calculation:
Airspeed is calculated as a function of the difference between Pitot Pressure and Static Pressure as follows:
Calculated or Indicated airspeed is indicated airspeed corrected for instrument errors, position error (due to incorrect pressure at the static port) and installation errors.
Calibrated airspeed values less than the speed of sound at standard sea level (661.4788 knots) are calculated as follows:
minus position and installation error correction.
Where
is the calibrated airspeed,
is the impact pressure (inches Hg) sensed by the pitot tube,
is 29.92126 inches Hg; static air pressure at standard sea level,
is 661.4788 knots:, speed of sound at standard sea level
Units other than knots and inches of mercury can be used, if used consistently.
This expression is based on the form of Bernoulli’s equation applicable to a perfect, incompressible gas. The values forand 
are consistent with the ISA i.e. the conditions under which airspeed indicators are calibrated.
Keep in mind that this is for your basic vanilla airspeed indicator and does not include calculations for TRUE Airspeed for which you must include the variables of True Temperature and True Altitude.
Stay tuned for upcoming Blogs
Pitot Static System ….Inside & Out
A. Pitot Pressure:
Pronounced: PEE-TOE, it is a French word
Pitot pressure is the measurement of the air forced into the Pitot Tube by the movement of the aircraft through the air. Pitot tubes are mounted on the aircraft facing forward so that air is forced into them. Most small aircraft have only one tube, larger aircraft have a redundant system and will have two tubes. The most common manufacturer of these tubes is Rosemont Corp. which is a division of BF Goodrich. Also on larger aircraft, those that fly at higher altitudes, the Pitot Tube is heated in order to prevent icing, smaller aircraft typically do not have this function.
The Pitot Tube is connected directly to the back of the airspeed indicator (the Pitot input) and if the aircraft is so equipped also to the Air Data Computer via a hose which is typically either plastic or rubber
B. Static Pressure:
Static pressure is the measurement of the ambient barometric pressure at the aircraft’s CURRENT location AND CURRENT Altitude.
The Static Port is located in a position on the aircraft that will not be affected by air flow as the aircraft moves through the air. This is typically on the side of the fuselage but can also be on the back side of the Pitot Tube or any other number of locations, it varies by the aircraft. Again smaller aircraft will typically have one Static Port, larger aircraft with redundant systems will have two.
The Static Port is connected directly to the following equipment, depending on aircraft configuration: The Airspeed Indicator (Static Input), the Altimeter, the Vertical Speed Indicator, the Altitude Encoder, the Air Data Computer. Again connection is typically made via a hose either rubber or plastic.
C. Airspeed Calculation:
Airspeed is calculated as a function of the difference between Pitot Pressure and Static Pressure as follows:
Calculated or Indicated airspeed is indicated airspeed corrected for instrument errors, position error (due to incorrect pressure at the static port) and installation errors.
Calibrated airspeed values less than the speed of sound at standard sea level (661.4788 knots) are calculated as follows:
minus position and installation error correction.
Stay tuned for upcoming Blogs
Overview of Capacitive Type Fuel Qty. Measuring Systems
The Capacitive Type Fuel Qty measuring system utilizes a variable capacitive element in order to vary a precise electrical AC voltage based on the quantity of fuel in the fuel tank. The varying electrical signal, in turn, is used to drive the pointer on a fuel quantity indicator in a manner which is proportional to the amount of fuel in the tank, thereby visibly indicating remaining fuel quantity to the pilot.
The typical components in this type of system include the following
1. Signal Conditioner or Control Monitor (If not included in the
indicator
2. Tank Unit (Fuel Qty Sender, Fuel Probe)
3. Indicator 
Stay tuned for upcoming Blogs
Typical Failures in Resistive Fuel Quantity Systems
Indicator
As previously stated the indicator in this type of system is quite simple, typically nothing more than a meter movement mounted within a case. A meter movement consists of a spool of wire mounted on a pivot and jewel housed within a frame. The frame is in fact a large powerful magnet.
As electrical current flows through the wire spool it interacts with the magnetic field of the frame causing the spool to rotate on its pivot and jewel.
Pivots
A pivot is nothing more than a miniature axle. A jewel is a finely ground glass cup within which the ends of the pivot are supported and allowed to rotate. Over time and with constant movement the ends of the pivot will begin to wear down similar to the point on a pencil. Eventually the pivot will become so worn that it can no longer rotate easily. It needs to be sharpened or replaced.
Jewels
As previously stated, a jewel is nothing more than a finely ground miniature glass cup. Glass is fragile; it breaks very easily when mishandled. The glass also becomes worn from the pivot constantly rotating within it. Eventually the glass will become rough and will need to be re-ground or replaced.
Magnets
The frame of the meter movement is a large magnet. A magnet is nothing more than a piece of steel within which all of the electrons, sub-atomic particles, have been aligned within a specific pattern. Eventually the electrons move and return to their original locations according to the laws of physics. With the loss of alignment the magnet loses its magnetic power.
However while the magnet is still operating properly it, like all magnets, attracts other ferrous metals. The pivot, manufactured with ferrous metal, is in close proximity to the magnet and it is wearing down from rotating within the jewel. As the pivot wears it throws off tiny particles of metal which are attracted to the magnet. Eventually enough of these particles will become lodged between the magnet and wire spool so as to inhibit free movement of the meter. The unit needs to be completely disassembled and thoroughly cleaned.
TANK UNITS
Resistive Elements
As previously described the resistive element is subject to wear from the constant movement of the wiper across its surface. Once it is overly worn or broken it must be replaced. There is no possibility of repair
Floats
The floats are very often nothing more than hollow metal balls. These sometimes spring leaks. The fuel must be drained and the float must be resealed.
Stay tuned for upcoming Blogs
