91.411: Altimeter System & Static Pressure Inspection
This test verifies the accuracy of:
- Your altimeter
- The static system
- Altitude reporting equipment (such as encoders)
This is required for IFR flights in controlled airspace.
91.413: Transponder System Testing
This checks:
- Your transponder’s signal strength and frequency
- Accurate Mode A/C/S replies
- Proper altitude encoding
- Squawk and IDENT functionality
This is required for all aircraft operating with a transponder in controlled airspace.
What to Expect During the Inspection
✅ Step 1: Pre-Check & Setup
Our certified technician will:
- Review your aircraft logbooks
- Set up FAA-approved test equipment
✅ Step 2: Altimeter System Testing (91.411)
We’ll:
- Pressurize the altimeter to simulate the altitude
- Test the static system for leaks
- Confirm encoder and altimeter performance meet tolerances
✅ Step 3: Transponder Testing (91.413)
We’ll:
- Verify your transponder’s transmission strength and timing
- Check the accuracy of squawk codes
- Confirm altitude reporting is matched to the encoder output
✅ Step 4: Logbook Sign-Off
Once complete, we:
- Document all test results
- Provide logbook endorsements with technician credentials
If any issues are found, we’ll walk you through the recommended repair options—honestly and clearly.
How Long Does It Take?
Most inspections take between 1.5 to 3 hours, depending on access and system conditions. We work efficiently to minimize your downtime without cutting corners.
Where Can It Be Done?
Apopka Avionics offers:
- On-site inspections at your hangar or tiedown
- Fast, mobile service across Central Florida
- FAA-certified technicians using calibrated test equipment
Why Choose Apopka Avionics?
🛩 Certified, Experienced Techs
🛩 Mobile Service Available
🛩 Fair, Transparent Pricing
🛩 No-Nonsense Advice
We’re aviators and business owners, too—we know your time and airworthiness matter.
Book Your 91.411 & 91.413 Inspection Today
📍 Apopka Avionics – Serving Orlando-Apopka Airport (X04) and beyond
📞 407-663-9855 or 954-830-1707
✉️ support@apopkaavionics.com
Fly legal. Fly safe. Trust Apopka Avionics for precision you can count on.
