Page 7-1
Pilot’s Operating Manual
Revision A2: Nov, 2004
Pro Line 21
Section - III
SYSTEMS DESCRIPTION
Sub-section 7
STALL WARNING/IDENTIFICATION
Table of Contents
Page
GENERAL ..................................................................................................... 7-3
SYSTEM LOGIC......................................................................................... 7-3
CONTROLS and ANNUNCIATIONS .......................................................... 7-3
OPERATION ................................................................................................. 7-4
STALL WARNING SYSTEM....................................................................... 7-4
STALL IDENTIFICATION SYSTEM ........................................................... 7-4
Figure 1 - Stall Valve Annunciators ........................................................ 7-4
Figure 2 - Variation of Stall Identification Angle With
Rate of Increase of Vane Angle ............................................. 7-5
THIRD STALL IDENTIFICATION CHANNEL ............................................. 7-6
Figure 3 - Stall Warning and Identification.............................................. 7-6
Figure 4 - Stall System Pitot Static Block Diagram................................. 7-7
SYSTEM FAULTS and ANNUNCIATIONS .................................................. 7-8
Figure 5 - System Fault Annunciators .................................................... 7-8
FLAP ASYMMETRY ................................................................................... 7-9
WEIGHT-ON-WHEELS ASYMMETRY....................................................... 7-9
SSU SELF TEST ........................................................................................ 7-9
SYSTEM ANNUNCIATORS........................................................................ 7-10
Table 1: Summary of Annunciators ...................................................... 7-10
SYSTEM POWER SUPPLIES..................................................................... 7-10
Table 2: Power Supplies....................................................................... 7-10
STALL WARNING and IDENTIFICATION LOGIC ..................................... 7-11
Figure 6 - Stall System Flow Logic ....................................................... 7-11