Aircraft Instrument Systems
Learn the mechanics, diagnostics, and regulatory testing behind pitot-static lines, gyroscopic flight gauges, and modern EFIS architectures for FAA Airframe certification.
Like Duolingo, but for Aircraft Instrument Systems. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
24 levels across 4 sections, about 48 minutes end to end, roughly 10 days at five minutes a day. It moves through Diagnosing Pitot-Static Lines and Mechanical Gauges; Gyroscopic Instruments and Pneumatic Power; Digital Avionics: EFIS, ADCs, and AHRS; and Maintenance, Compliance, and Calibration. It assumes you already know the basics.
Free forever · No credit card · iPhone & Android
Key ideas in Aircraft Instrument Systems
- Trapped water creates an oscillating column that dampens pressure transitions rather than freezing needles
- Low-point sump drains collect line condensation to prevent liquid slugs from acting like surge pistons
- A completely clogged pitot tube freezes the indicator in place or turns it into an altimeter
- Pitot heating elements rely on in-flight airflow for cooling and burn out quickly on the ground
- Monitoring electrical current draw on an ammeter proves element continuity without prolonged heating
- A brief touch test verifies initial warmth but leaving it on causes element coil failure
- Cockpit airflow creates lower pressure inside an unpressurized cabin than ambient outside air
- Lower static pressure fools the altimeter into expanding its wafer, indicating higher altitude
- Reduced static pressure expands the airspeed capsule against pitot pressure, inflating airspeed
- Static instruments measure ambient pressure drop using delicate expanding aneroid capsules
- Blowing positive pressure into a static port ruptures altimeter and VSI measurement wafers
- FAR 91.411 static tests require a controlled negative vacuum simulating climbing altitude
- Tight bends pinch tubing walls, restricting dynamic pressure changes to instruments
- Cushioned clamps isolate tubing from engine vibration that causes abrasive wear and pinhole leaks
- Lines must slope downward toward designated drains so condensation drains by gravity
- Dynamic pitot impact pressure plumbs directly into the interior of the expandable diaphragm capsule
You've tried the other tabs
Thirty open tabs. Four facts you actually kept.
You watched. You nodded. By Sunday it was gone.
One answer, then back to scrolling.
Eight weeks. You meant to finish. You didn't.
Tomo gives Aircraft Instrument Systems the Duolingo treatment: levels, streaks, and quick quizzes that test what you just learned. That game loop is what the tabs above never had, so it's the one you actually finish.
Here's what playing it feels like
A real question from this course. Take your best guess.
Why do aircraft pitot-static lines feature sump drains at their lowest routing points?
Get it right to open this lesson and 23 more in the app.
Where Aircraft Instrument Systems takes you
- 1
Diagnosing Pitot-Static Lines and Mechanical Gauges
- Tracing and Clearing Pitot-Static Lines
- Pitot-Static Gauge Mechanics and Failure Modes
- 2
Gyroscopic Instruments and Pneumatic Power
- Gyroscopic Principles and Instrument Gimbals
- Vacuum and Pressure Pneumatic Drive Systems
- 3
Digital Avionics: EFIS, ADCs, and AHRS
- Air Data Computers and Digital Sensing
- Attitude Heading Reference Systems (AHRS)
- 4
Maintenance, Compliance, and Calibration
- FAR 91.411 Static System and Altimeter Certification
- Instrument Installation, Markings, and Compass Swinging
4 sections · 8 units · 24 levels. Built to play, not to enroll.
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Add Tomo to ChatGPT- What to ask
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You pick the voice
Aircraft Instrument Systems is taught in the Professor style: clear, structured, thorough. Want a different feel? In the app you can spin up the same topic in any of Tomo's teaching styles. Same facts, totally different vibe.
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