Sennheiser SI 234 - ANNEXE 802 Operations Instructions download pdf (Page 353)

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DA 42 NG AFM Airplane Description

Doc. No. 7.01.16-E Rev. 3 01-Apr-2014 Page 7 - 5

Flaps

The flaps are a two piece construction. The inner part of the flap is mounted to the center

wing and the outer part to the wing. Both parts are connected to each other with a form

fit connection.

Construction: GFRP/CFRP composite sandwich.

Hinges: There are 6 hinges at the outer part and 4 hinges at the inner part of the

flap. These hinges are hinge pins mounted in an aluminum bracket. They

are secured in position by a roll pin. The absence of this roll pin can lead

to the loss of the hinge pin and a consequent loss of flight safety.

Operation: Each part is connected with a flap control horn to the push rods of the

flap control system. A rod end bearing is screwed into a steel push rod

and locked by means of a jam nut which has locking varnish applied to

it. Damage to this varnish can indicate a twisting and thus a change to

the adjustment. The connection between the rod end bearing and the

control horn is a bolt, the nut of which is likewise sealed with locking

varnish. The flap control horn is fully covered by a fairing mounted to the

flap control horn with three screws in the outer wings and four screws

in the center wing.

Each flap control horn is attached to the flap part with 3 screws.

The flaps are driven by an electric motor and have 3 settings:

- Cruise (UP), totally retracted

- Approach (APP), and

- Landing (LDG).

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Sennheiser SI 234 - ANNEXE 802 Operations Instructions Page 353

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