% B. TAE 125 Diesel Engine % Refer to the engine manufacturer.
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Maintenance Checks
5. Lightning Strike
A lightning strike usually enters the airplane at one point and leaves the airplane at another point. These points are called "attachment points". You usually find these points at the extremities of the airplane. You will often find the most damage to the airplane occurs at the attachment points. There can be more than 2 attachment points.
When a lightning strike is reported you must do the inspection procedure at sub-paragraph D before the next flight.
A. Group 1 Damage
Group 1 damage is the direct damage caused by the lightning strike. To find this damage you must carefully examine all the external surface of the airplane. Look specially for burn marks, holes, discoloration or other physical damage. If you find this damage you must remove panels or equipment to look for damage on the inside of the airplane. Look specially around the area of the external damage.
You must also examine the airplane lightning protection system. Look specially for signs of heat damage or distortion to the conduction tubes and bonding strips. Also look for heat damage in the structures around the conduction tubes and bonding strips. Refer to Section 51-80 for data about the lightning protection system.
B. Group 2 Damage
Group 2 damage is the indirect damage caused by the lightning strike. It is mostly caused by the electromagnetic fields associated with lightning strikes. The electromagnetic fields can induce temporary voltages into the wiring system. These temporary voltages can cause damage to the electrical and electronic components of the airplane. Refer to the Wiring Diagrams for data about the electrical wiring.
Note: If you find any lightning damage you must make a record of the damage and ask
Diamond Aircraft for advice before you repair or operate the airplane.
C. Equipment
Item Quantity Part No.
Bonding tester. 1 Commercial
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Maintenance Checks
AMM
D. Lightning Strike Inspection
DA 40 Series
Detail Steps/Work Items Key Items
(1) Examine the surface of the complete fuselage assembly. Look specially in these areas: S Propeller and spinner. S Exhaust pipes. S Engine breather. S Canopy handles. S Strobe lights. S Antennas. S Static discharge wicks. S Vertical fin tip. S Rudder. S Lower fin. If you find any damage you must examine the airplane internally, specially in the area of the external damage. Make a record of the damage you find and ask Diamond Aircraft for advice before you repair or operate the airplane.
(2) Examine the surface of the left wing for lightning damage. Look specially in these areas: S Pitot head. S Static discharge wicks. S Wing tip. S Wing tip light assembly. S Wing trailing edge. S Aileron trailing edge. S Flap trailing edge. S Aileron horn. S Flap horn. If you find any damage you must examine the airplane internally, specially in the area of the external damage. Make a record of the damage you find and ask Diamond Aircraft for advice before you repair or operate the airplane.
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