Item 24 Gyromagnetic Compass AN./ASN-43

TM 11-1520-209-ESC

Item 23 Aircraft Magnetic Compass. Type J-2 (Continued)

RATINGS

PROCEDURE

GREEN

AMBER

RED

AC andJ-2 COMP DC circuit

breakers are closed Set the

COMPASS SLAVING switches to IN

Note that compass card of RMI

indicates within + 2 of known correct

heading after 3 minutes have passed

Item 24 Gyromagnetic Compass AN./ASN-43

RATINGS

PROCEDURE

GREEN

AMBER

RED

Compass card does not

Note: This test must be performed

Compass card indicates within + 3

of known correct magnetic heading

indicate within + 3 of

with engines running at sufficient

known correct heading

speed to extinguish the GEN OFF

caution light Set BATTERY switch to

ON Position aircraft on compass rose

Align aircraft to a known correct

magnetic heading Check that COMP

and RMI circuit breakers are closed

Set MAG-DG switch to MAG. Note

that compass card of RMI indicates

within + 3 of known correct magnetic

heading b. Rating /or Navigation

System. The color rating will be the

lowest rating recorded above.

Rating for Navigation System. The color rating will be the lowest rating recorded above.