DA-42 Austro(CS)

DA42 NG (Austro Engine) – Examination Notes

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This comprehensive study guide is designed for pilot training, DGCA technical examinations, oral assessments, and quick revision. The notes are compiled from the DA42 NG, DA42 Austro POH, aircraft limitations, performance data, fuel system, electrical system, engine operation, G1000 avionics, and emergency procedures to help students prepare efficiently.

1. Aircraft Dimensions & Structure

ItemValue
Wingspan13.42 m
Wing Area16.29 m²
Wing Dihedral5°
Aspect Ratio11.06
Horizontal Tail Incidence-1.1°
Rudder Area0.78 m²
Wheel Base1.735 m
Propeller Blades3
Structure TypeSemi-Monocoque
Electrical System28 V DC
Maximum Occupants4
Minimum Crew2

2. Important Airspeeds

SpeedValue
Engine Restart Speed100 KIAS
Rotation Speed (Vr) ≤1900 kg76 KIAS
Best Rate of Climb (Vy)90 KIAS
Single Engine Best ROC (Vyse)85 KIAS
VMCA (Flaps Up)71 KIAS
Final Approach Speed84 KIAS
Go Around Speed90 KIAS
Va (>1800 kg)122 KIAS
VNO151 KIAS
VNE188 KIAS
Landing Gear Extension Speed (VLO EXT)188 KIAS
Landing Gear Retraction Speed (VLO RET)152 KIAS
Emergency Gear Extension Speed152 KIAS
Maximum Landing Gear Operating Speed (VLE)188 KIAS
Maximum Flap Extended Speed (VFE LDG)113 KIAS
Canopy Emergency Opening Speed117 KIAS

Airspeed Color Bands

BandRange
Green Arc68–151 KIAS
Yellow Arc151–188 KIAS
White Arc62–113 KIAS
Blue Line (Vyse)85 KIAS
Red Line (VMCA)71 KIAS

3. Stall Speeds

ConfigurationSpeed
Flaps LAND, Gear DOWN57 KIAS
Flaps UP, Gear UP64 KIAS
Flaps UP, Gear UP at 1900 kg68 KIAS

4. Weight & Loading

ItemValue
Maximum Landing Weight3979 lbs
Cockpit Baggage Compartment Load45 kg
Datum Location2.196 m from wing root

Effects of Exceeding MTOW

Exceeding MTOW results in degradation of flight characteristics, degradation of aircraft performance, and possible overstressing of aircraft structure.

5. Fuel System

ItemValue
Main Tank Usable Fuel25 US gal × 2
Auxiliary Tank Usable Fuel13 US gal × 2
Maximum Fuel Imbalance5 US gal
Approved FuelJet A / Jet A1
Fuel Quantity Indicator Range1–25 gal
Fuel Pressure Limits4–7 bar

Fuel System Facts

  • Crossfeed supplies fuel from the opposite side main tank.
  • During right engine failure, crossfeed is selected on the left fuel selector.
  • Takeoffs are prohibited with fuel selector in crossfeed position.
  • Before moving fuel selector from or to crossfeed, ensure fuel pump is OFF.
  • Fuel information displayed via FUEL button is supplemental and must be verified by flight crew.

6. Engine & Propeller Limitations

ItemValue
Maximum Continuous RPM2300 RPM
Minimum RPM for Feathering1300 RPM
Oil Quantity5–7 L
Normal Oil Pressure2.5–6.0 bar
Maximum Oil Pressure6.5 bar
Oil Temperature (Continuous Operation)50–135°C
Maximum Oil Temperature140°C
Minimum Coolant Temperature at Startup-30°C
Maximum Gearbox Temperature120°C
Engine Oil GradeSAE 5W-30

Engine Operating Notes

  • If oil pressure does not enter green range within 3 seconds after start, switch OFF engine master.
  • If oil pressure remains outside green after start, shut down immediately.
  • Low oil pressure with normal oil temperature usually indicates a faulty oil pressure indication.
  • After six start attempts, allow starter cooling for 30 minutes.
  • Starter motor operation is limited to 30 seconds per attempt.

7. Electrical System

ItemValue
Battery Voltage Range24.1–32.0 V
Red Arc Starts At24.1 V
ECU Backup Battery Endurance30 minutes

Warning Messages

MessageMeaning
L/R ALTN FAILLeft/Right Generator Failure
GIA FAN FAILGIA Cooling Fan Inoperative
L/R Oil Pressure LowOil pressure below 0.9 bar
Warning MessagesDisplayed in RED

8. Flight Limitations

ItemLimitation
Maximum Operating Altitude18,000 ft
Maximum Bank Angle (Normal Category)60°
AerobaticsNot Permitted
SpinningNot Permitted

Load Factors

ConditionLoad Factor
Positive at Vo+3.8
Positive at VNE+3.8
Positive with Flaps Down+2.0
Negative at Vo-1.52
Negative at VNE-1.52

Geographic Limitation

Operations are prohibited north of 72° N and south of 70° S.

9. Landing Gear System

Emergency Extension

  • Reduce speed below 110 KIAS.
  • Apply moderate yawing and pitching to help gear lock.
  • Manual gear extension takes approximately 20 seconds.
  • Landing gear unsafe light should not remain illuminated for more than 20 seconds.

Gear Warning System

  • Warning horn sounds when power lever is below 25% and gear remains retracted.
  • Pulling landing gear circuit breaker illuminates the red light.
  • Unsafe indication occurs when gear position is not correctly established.

10. G1000 & Avionics

Primary Flight Display (PFD)

Provides:

  • Attitude
  • Heading
  • Air Data
  • Navigation Information
  • Alerting Information

G1000 Facts

  • Holding COM transfer button for 2 seconds tunes emergency frequency.
  • Engine instruments become available on MFD only after G1000 power-up is completed.
  • AHRS failure may be indicated by multiple abnormal indications and warnings.

Instrument Identification

Instrument No.Description
27Autopilot Control
21Emergency Compass
09Instrument Light Rotary Knob
02Avionics Master

11. Normal & Emergency Procedures

Canopy

If takeoff occurs with canopy in cooling-gap position, land and close canopy.

Autopilot Trim Failure

Appropriate action includes the procedures covered under both associated corrective actions (exam answer: “Both B & C”).

Engine Failure

If loss of power occurs due to inadvertent throttle position, adjust friction lock.

Emergency Switch Seal Broken

Only VFR flights may be conducted.

12. Performance Corrections

ConditionEffect
1% Upslope+9% Takeoff Distance
14 kt Headwind-10% Takeoff Distance
3 kt Tailwind+10% Takeoff Distance

Demonstrated Crosswind

ConfigurationValue
Flaps UP25 kt
Flaps APP20 kt

High-Yield Numbers for Quick Revision

ItemValue
Wingspan13.42 m
Wing Area16.29 m²
VNE188 KIAS
VNO151 KIAS
Va122 KIAS
Vy90 KIAS
Vyse85 KIAS
VMCA71 KIAS
VFE113 KIAS
Max Altitude18,000 ft
Main Fuel25×2 USG
Auxiliary Fuel13×2 USG
MLW3979 lbs
Max Oil Pressure6.5 bar
Oil Quantity5–7 L
ECU Backup30 min
Bank Angle Limit60°
Occupants4
Crew2

These are the values most frequently repeated in DA42 technical examinations and oral checks.

What is the maximum operating altitude of the DA42 NG?

The maximum operating altitude of the DA42 NG is 18,000 feet.

What is the VNE of the DA42 NG?

The never exceed speed (VNE) of the DA42 NG is 188 KIAS.

What fuel is approved for the DA42 NG Austro Engine?

The DA42 NG is approved to operate on Jet A and Jet A1 fuel.

What is the best single-engine rate of climb speed in the DA42 NG?

The best single-engine rate of climb speed (Vyse) is 85 KIAS.

What is the maximum flap extended speed in the DA42 NG?

The maximum flap extended speed (VFE) in landing configuration is 113 KIAS.

How much usable fuel does the DA42 NG carry?

The aircraft carries 25 US gallons usable fuel in each main tank and 13 US gallons usable fuel in each auxiliary tank.

What is the maximum landing weight of the DA42 NG?

The maximum landing weight (MLW) of the DA42 NG is 3979 pounds.

What is VMCA in the DA42 NG?

The minimum control speed with the critical engine inoperative (VMCA) is 71 KIAS.

Is spinning permitted in the DA42 NG?

No. Intentional spinning is prohibited in the DA42 NG.

What is the maximum bank angle allowed in the normal category?

The maximum permitted bank angle is 60 degrees.

What is the normal electrical system voltage of the DA42 NG?

The DA42 NG operates on a 28-volt DC electrical system.

What is the demonstrated crosswind component for the DA42 NG?

The demonstrated crosswind component is 25 knots with flaps UP and 20 knots with flaps APP.

What is the maximum fuel imbalance allowed?

The maximum allowable fuel imbalance is 5 US gallons.

What is the best rate of climb speed in the DA42 NG?

The best rate of climb speed (Vy) is 90 KIAS.

What is the best single-engine climb speed in the DA42 NG?

The best single-engine rate of climb speed (Vyse) is 85 KIAS.

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