09.12.2012 Views

NOTICE

NOTICE

NOTICE

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

CESSNA SECTION 7<br />

MODEL 208B G1000 AIRPLANE AND SYSTEMS DESCRIPTION<br />

VACUUM SYSTEM AND INSTRUMENTS<br />

A vacuum system (see Typical Vacuum System figure) provides the<br />

suction necessary to operate the standby attitude indicator. Vacuum is<br />

obtained by passing regulated compressor outlet bleed air through a<br />

vacuum ejector. Bleed air flowing through an orifice in the ejector<br />

creates the suction necessary to operate the indicator. The vacuum<br />

system consists of the bleed air pressure regulator, a vacuum ejector<br />

on the forward left side of the firewall, a vacuum relief valve and<br />

vacuum system air filter on the aft side of the firewall, and the standby<br />

attitude indicator.<br />

ATTITUDE INDICATOR (Standby Instrument Panel)<br />

Standby attitude information is depicted by a vacuum-driven attitude<br />

indicator. Bank attitude is presented by a pointer at the top of the<br />

indicator relative to the bank scale which has index marks at 10°, 20°,<br />

30°, 60°, and 90° either side of the center mark. Pitch and roll attitudes<br />

are presented by a miniature airplane superimposed over a symbolic<br />

horizon area divided into two sections by a white horizon bar. The<br />

upper blue sky and the lower ground area have arbitrary pitch<br />

reference lines useful for pitch attitude control. A knob at the bottom of<br />

the instrument is provided for inflight adjustment of the miniature<br />

airplane to the horizon bar for a more accurate flight attitude indication.<br />

LOW-VACUUM WARNING FLAG<br />

The standby attitude indicator includes an orange low-vacuum warning<br />

flag (GYRO) that comes into view when the vacuum is below the level<br />

necessary for reliable gyroscope operation.<br />

WARNING<br />

The orange low-vacuum warning flag (gyro) is the<br />

only indication of the loss of the vacuum system.<br />

208BPHBUS-00<br />

U.S.<br />

7-93

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!