A lightning strike on a composite blade may be indicated by small burnt areas on the composite where the lightning may have attached or exited (see Figure 1-11 or 1-12). Composite blades may suffer other damage as well.

Due to the composite construction of the propeller blades, in the event of a lightning strike, in addition to the lightning strike inspection criteria provided in the applicable Airplane Maintenance Manual, refer to Manual 411, Inspection and Check Section Chapter 5, Special Inspections - Lightning Strike, for detailed information on propeller ...

Jun 2, 2020 · In Struck episode 11 we discussed propeller planes and what happens when lightning strikes. Propellers used to be made of wood, then aluminum and now carbon fiber, but leading edge erosion and protection is critical, so how do manufacturers plan for this?

§ 35.38 Lightning strike. The applicant must demonstrate, by tests, analysis based on tests, or experience on similar designs, that the propeller can withstand a lightning strike without causing a major or hazardous propeller effect. The limit to which the propeller has been qualified must be documented in the appropriate manuals.

propellers following a suspected lightning-strike. Determination of Lightning Strike: I If doubt exists as to the occurrance of a lightning strike, the following criteria can be used to verify any suspicion: 1) Check for burns or signs of arcing on blades and hub.

Propeller blades are among aircraft components most frequently struck by lightning. Carbon fiber-reinforced plastic materials are especially sensitive to lightning damage due to their partial...

Nov 26, 2013 · A method for limiting damage to an aircraft's composite propeller from a lightning strike, the method comprising: fabricating a composite propeller blade having a leading edge extending between a tip and a hub; coating the composite propeller with a non-conductive glass; securing an electrically conductive band extending longitudinally on ...

Jan 11, 2014 · Everything was working after the strike. However, an inspection of the airplane afterward showed that the very aft end of the right tip tank had melted and then resolidified. As I understand it, a lightning charge typically "flows" around the outside of a metal aircraft.

If a lightning strike is present, a darkened area and possible pitting, usually in the proximity of the tip, will be noticeable. If a lightning strike is suspected or detected, consider the blade unairworthy.

Feb 3, 2016 · Yes, it's not just damage during the strike you need to worry about. Check for magnetized parts. Running a turbine, particularly, with magnetized parts can create a generator that will run current through the bearings. Things can get bad from that. Dan