Targeted
Repair
Find the fault and fix it: troubleshooting on the bench, then correcting the problem and confirming the instrument operates properly.
Repair vs. overhaul
Gyro instrument repair & overhaul
Attitude indicators, directional gyros, HSIs, flight directors and turn coordinators for helicopter and fixed-wing aircraft, including the Castleberry gyro line.
Gyro instruments
Gyro instruments we repair and overhaul
A spinning gyroscope senses attitude, heading or rate of turn. These are the gyro instruments operators send us most.
5,000+ instruments on our capabilities list, from many manufacturers
ASIAirspeed
ALTAltimeter
TCTurn coordinator
VSIVertical speed
- Castleberry gyros
- Other instruments
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Attitude indicators
Also called artificial horizons. They show the aircraft's pitch and bank against the horizon.
Common reasons for removal
- Slow to erect, or won't erect fully after start-up
- Horizon bar tilts or drifts in straight-and-level flight
- Warning flag stays in view, or the gyro whines or grinds as it spins down
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Flight directors
Add command bars to the attitude display, showing the pitch and bank to fly to stay on a selected path.
Common reasons for removal
- Command bars stuck, biased or out of view
- Warning flags stay in view
- Attitude display slow to erect or drifting
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Directional gyros
Also called heading indicators. They show the aircraft's heading without the swing of a magnetic compass.
Common reasons for removal
- Heading drifts faster than normal precession between resets
- Card sticks, jumps or won't set with the heading knob
- Whining or grinding from the gyro
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Horizontal situation indicators
Combine a heading indicator with course deviation, so heading and navigation read from one display.
Common reasons for removal
- Heading card sticks, jumps or is slow to slave
- Course or glideslope pointers stuck or sluggish
- Warning flags stay in view
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Turn and bank indicators / turn coordinators
Show the rate of turn, with a ball that shows whether the turn is coordinated.
Common reasons for removal
- Sluggish or no response in a turn
- Warning flag stays in view on an electric unit
- Bubble or discolored fluid in the ball's tube
Don't see your instrument here? Check your part number against our full capabilities list.
Service options
Repair, overhaul, exchange or replace
We evaluate every instrument on the bench, talk through what we found and recommend whether to repair or replace it. You choose how to proceed.
Bench evaluation
Complete
Overhaul
Restore the whole instrument: it is disassembled, cleaned, inspected, repaired as necessary, reassembled and tested.
How it worksWhen downtime matters
Exchange
When the aircraft can't wait for its own gyro, ask about an exchange. Options depend on the part number, so send it and we'll tell you what's possible.
About exchangesRefresh and modernize
Replace
When a gyro is beyond economical repair, or you're ready for more capability, we supply new instruments and avionics upgrades from Garmin, Mid-Continent, Sigma-Tek and more.
Sales & UpgradesHave this ready
- Manufacturer and model
- Part number from the data plate
- What the instrument is doing, or not doing
- Your company, name, phone and email
A gyro is fragile in transit, so pack it with care. How to pack and ship it
The Castleberry line
Castleberry gyros
Castleberry attitude indicators, flight director gyros and directional gyros are no longer in production. We repair and overhaul the ones still flying.
The line grew out of the AIM gyros: Castleberry's 900 series replaced most of the discontinued AIM 510 series. Our Castleberry gyros page lists every model, with its features.
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900-23EH attitude indicator -
200 series, helicopter display -
900-23V flight director
Capabilities list
Check your part number
Find the part number on the instrument's data plate and send it to us. We'll check it against our capabilities list of more than 5,000 instruments.
Supported brands
- AIM
- INSCO
- Bendix/King
- Castleberry
- and many more
Related
Related services
Request service
Start a service request
Send the make, model and part number, and we'll help you choose between repair, overhaul, exchange and replacement for your gyro.