Section IV. STABILIZATION SYSTEM EVALUATION PROCEDURE

Section IV. STABILIZATION SYSTEM EVALUATION PROCEDURE

10. Evaluation Requirements. a. Power Application. Use external

11. Procedure. a. All information will be determined by actual

power or the aircraft auxiliary power unit. Both electric and hydraulic power

inspection and operation of the equipment Evaluate each item listed and

are required for items 26 and 27.

record the proper color rating on DA Form 2404 as described in Section I. All

b. Controls. Before beginning the tests, set the aircraft ac and dc

operator/crew preventive maintenance checks and services shall be

performed prior to evaluation.

circuit breakers so that power is available to operate the stabilization

equipment.

Item 25. MWO

RATINGS

PROCEDURE

GREEN

AMBER

RED

Determine if all pertinent URGENT

All pertinent URGENT MV/WO have

One or more URGENT MO have not been

MWO have been applied.

been applied.

applied.

Item 26. Stability Augmentation System (SAS). Single SAS Operation

RATINGS

PROCEDURE

GREEN

AMBER

RED

Note: SAS tests require ac and

SAS OFF caution light comes on for

Meter readings are erratic and incorrect SAS

hydraulic power to be supplied to the

inoperative amplifier. Meter (on

OFF caution light operation not as required

aircraft Set FLT CONT panel SAS

operating amplifier) indicates

switch to NO. 1 ON and NO. 2 ON.

between 250 and 350 with selector

in turn. Set the selector switch to

switch at DC Meter indicates

DC and AC. in turn, and observe

between 250 and 450 with selector

meter indications. Set selector switch

switch at A(C With se-

to PITCH. ROLL YAW, and S/SLIP.

in turn. Operate

TM 11-1520-209-ESC