Embraer EMB145 Operation Manual page 364

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SUPPLEMENTARY

FLIGHT INSTRUMENTS

To verify if altimeter difference is within tolerance, the flight crew

should proceed as follows:

Altitude...........................................................................STABILIZE

Maintain variation within +/- 50 ft.

Air Speed.......................................................................STABILIZE

Maintain variation within +/- 5 kt.

Wait a minimum of 15 seconds in straight and leveled flight, preferably

with Autopilot engaged, to compare the difference between altitudes

using the following table:

Differences greater than the values in the table must be verified by

maintenance checks.

In flight, if a discrepancy is reported between the values shown in the

table, a double check must be performed using the previous and the

next referenced altitude level.

BETWEEN PILOT

AND COPILOT'S

MAXIMUM DIFFERENCE

BETWEEN PILOT OR

COPILOT'S ALTIMETERS AND

STANDBY ALTIMETER

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