IFH 6-23

Figure 6-31. Supporting instruments. VOR 1 270° 2 1 1 2 -500 4200 4100 4000 3900 3800 3700 3700 3600 3500 3400 3300 3200 3100 40 80 3900 4000 130 120 110 90 80 70 1 100 9 TAS 100KT Figure 4-27. Supporting Instruments 270°4100 3000 3900 20 80 40003100 4000 3900 80 70 3975-1253100 4000 3900 70 30 3950-2504000 3000 3800 45 05 3925-375 Altitude trend vector Turn rate trend vector Airspeed trend (increasing) Figure 6-32. Primary bank. XPDR 5537 IDNT LCL23:00:34 5 338 1 1652 200 46 13.7 2300 23.0 VOR 1 270° 2 1 1 2 4300 4200 4100 4000 3900 3800 4300 3600 3500 3400 3300 3200 3100 60 20 4000 4000 130 120 110 90 80 70 1 100 9 TAS 100KT ALERTS NAV1 108.00 113.00 NAV2 108.00 110.60 134.000 118.000 COM1 123.800 118.000 COM2 WPT _ _ _ _ _ _ DIS _ _ ._ NM DTK _ _ _° TRK 360° Roll scale zero Slip/skid indicator Skidding turn 270° Roll pointer Standard rate Heading 1/2 standard rate Turn rate trend vector regarding the direction and rate of altitude deviations. The pilot is thus able to make corrections to the pitch attitude before a large deviation in altitude occurs. The airspeed indicator depicts an increase if the pitch attitude is lowered. Conversely, when the pitch attitude increases, the pilot should note a decrease in the airspeed. Primary Bank When flying in IMC, pilots maintain preplanned or assigned headings. With this in mind, the primary instrument for bank angle is the heading indicator. Heading changes are displayed instantaneously. The heading indicator is the only instrument that displays the current magnetic heading, provided that it is matched to the magnetic compass with all deviation adjustments accounted for. [Figure 6-32] There are supporting instruments associated with bank as well. The turn rate trend indicator shows the pilot when the aircraft is changing heading. The magnetic compass is also useful for maintaining a heading; however, it is influenced by several errors in various phases of flight. Primary Yaw The slip/skid indicator is the primary instrument for yaw. It is the only instrument that can indicate if the aircraft is pilot is made aware that the pitch attitude of the aircraft has changed and may need adjustment. Notice in Figure 6-31 that the aircraft is descending at a rate of 500 fpm. The instrument cross-check necessitates utilizing these supporting instruments to better manage altitude control. The VSI and trend tape provide the pilot with information