TM 551510-220-10 Table 3-5.  Malfunction Codes (Sheet I of 2) Malf Modes of Recommended Code Failed Test Operation Action Code 10 Invalid platform heading ALIGN 04 12* Canned altitude profile in use (input altitude invalid) ALIGN, NAV 05 13 Y velocity change NAV 02 14 X velocity change NAV 02 15 Torque limited ALIGN, NAV 02 1i Invalid pitch and roll ALIGN, NAV 05 17 Invalid magnetic heading ALIGN, NAV 05 18 Excessive saturation time ALIGN 04 20* Track angle error and drift angle No. 1 ALIGN, NAV 03 22* Track angle error plus drift angle ALIGN, NAV 03 23* Drift angle ALIGN, NAV 03 24* Steering converter ALIGN, NAV 03 25* True heading converter ALIGN, NAV 03 26* XTK converter ALIGN, NAV 03 31 Ground speed NAV 02 32 Memory parity STBY, ALIGN, NAV 02 33 Azimuth stabilization loop ALIGN, NAV 01 34 Inner roll stabilization loop ALIGN, NAV 01 35 Pitch stabilization loop ALIGN, NAV 01 *Failed test does not illuminate WARN light on CDU. 3-75