Tecnam P92 Echo Super - 4.4 Horizontal Tail (Stabilator)

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4.4 Horizontal Tail

P92 Echo Super

Maintenance

Manual

The horizontal tail is an all-moving type, that is, the stabilizer and elevator form a single, uniform plane called stabilator

that rotates about an axis normal to fuselage at the desired pitch setting.

The stabilator structure (see fig.4-5) is made-up of an aluminum tubular spar (1) to which a series of ribs (2) and an

aluminum leading edge (3) are riveted. Dacron heat-shrink wrap-around material covers structure.

A trim tab (4) provides stick force adjustment and longitudinal compensation through an electric actuator

ntrolled by

pilot. Tab is split in two parts interconnected at the support brackets (5) and attached to the stabilator through four external

hinges (6) that allow for immediate inspection.

Figure 4-5

Stabilator

To remove the stabilator, disconnect the two halves of the tab from each other and from the control rod, remove pins (7),

and then remove half-planes. To avoid cover damage during operation, handle parts by their rigid components.

Reverse procedure for reinstallation applying a small amount of grease to the inside of the torque tube (1) to facilitate

insertion and gently tapping parts into position being careful not to deform outward ribs.

The stabilator control system is push-pull type (see fig. 4-6) and is controlled from the cabin via the control sticks. Control

is transmitted through a push-pull rod (1) linked to a bellcrank (2) and a shaft (3) that runs through the tail cone supported

at midsection by a bracket (4) and connected with the stabilator torque tube through the aft bellcrank assembly (5).

All significant transmission elements such as bellcranks, pushrods, supports and hinges can be easily accessed and

inspected.

Revision Date:

10-29-2007

Revision Number:

3.01

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