Gazelle SA 341 main gearbox description

Main gearbox is the crucial connection between Astazou engine, frame, the main rotor and tail rotor.This work of tech ingenious art is carrier of the hydro pack as well.There is a RPM sender inside it and you can see rotor rpm-s at the inside scale of tachometer at the instrumental board .At the side of main gearbox is also place for low oil pressure sender.Everything is here at this video.

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Gazelle Turbomeca Astazou III B engine complete insight

The complete insight of Turbomeca Astazou III B engine

SA-342 Gazelle-How to fix exhaust temperature problem

Initial remark is vibrating temperature oscillation seen at exhaust temperature indicator at range from 50 to 300 C during the flight.For everyone who knows this type of engine it should be steady at 450 C.The engine RPM are fixed at 43500 which is excellent.The following procedure is check the RPM indicator.Done, it is accurate.Next is to check the resistance of the wires at thermocouple system.Found to be 18,03 Ohms.Fixed at variable resistor and adjusted it at strictly 16.02 ohms.The serial numbers of thermocouple senders indicated that value.

When I have approached the connector and disassemble it I have found that the pins are loose and their connection to the wires are bad.

So after carefully inspection there is a one pin with signs of overheating others are too but this one is more than others.Procedure follows.

Changing all four pins by new ones, Coat it carefully with thermo coater insulation , fixing the wires with clamps.Everything is now sure to be proven good and secur…

Gazelle SA-341 SA-342 workshop

Gazelle SA-342 in the process of manufacturing to be as good as new

The process of overhauling is at the stage where SA-342 gets new paint after the old one is removed completely.The new wiring is placed.That all guarantees long and safe flight hours.

Gazelle SA341/342,Avionics instruments,radio-radar and electro equipment for helicopters

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