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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 co 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.
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Figure 4-5 Stabilator
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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.
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Revision Date: 10-29-2007
Revision Number: 3.01
Summary of Contents for P92 Echo Super
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