Diamond DA40 (G1000) — Instrument Checkride Guide

What IFR-relevant systems does the Diamond DA40 have?

The DA40 is a low-wing, composite-construction aircraft, and both of those characteristics shape its IFR-relevant systems in ways the DPE will probe. Understanding these distinctions — rather than just memorizing checklist items — is what ACS task area II (Aircraft Systems Related to IFR Operations) is designed to evaluate.

No vacuum system. The G1000-equipped DA40 eliminates the vacuum pump entirely. Attitude and heading reference functions are handled by the solid-state AHRS, which runs on the aircraft's electrical bus. The practical consequence: the failure mode that replaces "vacuum pump seizes" is "electrical bus fault or AHRS unit failure." The DPE will ask you to articulate this difference explicitly.

Fuel system — low-wing architecture. The DA40 is a low-wing aircraft, which means fuel cannot gravity-feed to the engine. The fuel system relies on an electric fuel pump as the primary source in most configurations, with a second pump as backup. The fuel selector typically provides discrete LEFT, RIGHT, and OFF positions (and sometimes BOTH, depending on the variant). Confirm your specific aircraft's fuel selector positions in the POH — the DPE will ask you to walk through the system and explain when each pump must be operating.

Pitot-static system. The pitot-static plumbing feeds an Air Data Computer (ADC) rather than individual round gauges. Pitot heat is still required for flight into known or forecast icing conditions per 14 CFR 91.205(d) . Verify pitot heat function during preflight — a cold-soak composite airframe can mask a failed heater element until the aircraft is in the air.

Electrical system. The DA40 uses a single-alternator, single-battery electrical architecture. The G1000 draws from the avionics bus; alternator failure means battery-only endurance. Know your load-shedding sequence and approximate battery duration from the POH for your specific aircraft before the checkride.

What does the Garmin G1000 avionics suite include in the DA40?

The G1000 installation in the DA40 follows the same architecture used in the

and other NAV III-family aircraft: a Primary Flight Display (PFD) on the left, a Multi-Function Display (MFD) on the right, and a shared set of sensor and avionics units feeding both screens.

The WAAS-capable GIA 63W units support LPV minimums on RNAV (GPS) approaches per AIM Section 1-1-17 , provided the navigation database is current. Each GIA also contains a VHF nav receiver for VOR and ILS — giving the aircraft two independent nav chains from GPS through ILS.

What is reversionary mode and when do you need it?

Reversionary mode is the G1000's single-display fallback configuration. When one of the two GDU 1040 displays fails, the pilot presses the red DISPLAY BACKUP button on the GMA 1347 audio panel. The surviving display reconfigures to show a combined layout: the PFD format (attitude, airspeed, altitude, HSI) on the left portion and a compressed engine and navigation panel on the right.

The DPE's reversionary-mode question is a systems-thinking check. They want to hear that you understand the G1000's redundant display architecture and can distinguish between a recoverable single-display failure and a full electrical failure requiring standby instruments.

What are the IFR implications of the DA40's composite airframe?

The DA40's composite construction — carbon fiber and fiberglass rather than aluminum — introduces two IFR-specific considerations that distinguish it from metal-airframe trainers like the Cessna 172 or Piper Archer.

Lightning protection. Aluminum naturally conducts electricity, providing a built-in current path if lightning strikes the airframe. Composites do not. Diamond incorporates conductive bonding straps and mesh within the DA40 airframe to provide a lightning current path and protect avionics from induced currents. Per the Instrument Flying Handbook (FAA-H-8083-15B) , avoiding cumulonimbus and thunderstorms is a fundamental IFR risk-management principle — the composite airframe makes this rule no different in letter, but the DPE may ask how composite construction changes the lightning exposure picture compared to metal.

Icing certification. The base DA40 is not certified for flight into known icing (FIKI). The DA40 FIKI variant — fitted with a TKS fluid anti-ice system on the wing and horizontal stabilizer leading edges and the propeller — is certified for flight into known icing when the system is operative and fluid quantity is sufficient. Composite leading edges do not shed ice the same way heated aluminum does; the TKS system chemically prevents ice adhesion rather than melting accumulated ice.

• Base DA40: not approved for flight into known icing — avoid IMC where icing is forecast or reported
• DA40 FIKI: TKS fluid anti-ice system on leading edges and propeller — approved for flight into known icing when operative
• Verify your specific aircraft's FIKI status in the POH and on the AFM supplement before any IMC flight with icing potential
• Composite structure requires bonding straps for lightning protection — not a pilot-action item, but a DPE knowledge probe
• Cold-soak behavior: composite airframes can retain low skin temperatures that accelerate ice accretion at altitude — a consideration distinct from metal aircraft

What are common DPE oral questions for the Diamond DA40?

DPEs testing applicants in the DA40 consistently probe the composite-airframe and G1000 system distinctions alongside the standard Instrument Rating ACS (FAA-S-ACS-8C) knowledge requirements. The following questions represent the range a DPE is likely to ask under ACS task areas II (Aircraft Systems) and VI (Instrument Approach Procedures):

1. 1
   Your Cessna 172 had a vacuum pump. This DA40 doesn't. What replaces it, what power source does it use, and what does a failure look like on the PFD?
2. 2
   The DA40 is composite. How does that change your exposure if you blunder into a thunderstorm compared to flying a metal-airframe airplane?
3. 3
   Your specific aircraft is not FIKI-equipped. ATC issues a clearance into an area with a pilot report of light mixed icing. What are your options?
4. 4
   Walk me through the DA40 fuel system — how fuel reaches the engine, when the pump must be ON, and how this differs from a high-wing Cessna 172.
5. 5
   Your MFD goes blank just after you enter the clouds. Describe your immediate actions, what reversionary mode gives you, and how you activate it.
6. 6
   The G1000 annunciates LNAV+V on the PFD during an LPV approach. Which minimums apply and why?
7. 7
   Your navigation database expired three days ago. You are cleared for the RNAV (GPS) LPV approach. Can you fly it? What about the ILS to the same runway?
8. 8
   Describe the DA40 electrical system in the context of an alternator failure in IMC — what loads do you shed and in what order?

How do you set up an approach in the DA40 G1000?

The G1000 approach workflow in the DA40 follows the same conceptual sequence as other G1000 NAV III installations. Know the workflow conceptually — button sequences vary by software version, and the DPE is evaluating your situational awareness, not button memorization:

1. 1
   Verify GPS database currency on the MFD startup page or AUX — System Status page before departure.
2. 2
   Press PROC on the MFD or PFD bezel to open the Procedures page.
3. 3
   Select the destination, approach type, runway, and transition (IAF or vectors-to-final).
4. 4
   Review the loaded approach on the Active Flight Plan page — verify IAF, FAF, MAP, and missed approach procedure.
5. 5
   Activate the approach or select Activate Vectors-to-Final when ATC provides radar vectors.
6. 6
   Verify the CDI source on the PFD HSI: GPS for RNAV approaches, VLOC for ILS. The G1000 may auto-sequence from GPS to VLOC when the localizer is captured on an ILS — confirm this transition occurs.
7. 7
   Brief the minimums, inbound course, FAF altitude, and missed approach — the DPE watches whether you brief or just load.

For LPV approaches, the G1000 must annunciate LPV — not LNAV or LNAV+V — on the PFD for the lower LPV decision altitude to apply. LNAV+V provides advisory vertical guidance only; LNAV minimums apply. The DPE will ask about this distinction directly.

Practice Questions

Frequently Asked Questions

Sources