KLM MD-11 - Windshear Guidance Reversion; Takeoff Roll and Takeoff

MD-11 Flight Crew Operations Manual
k
Automatic Flight -
Description and Operation
Auto.10.30
On approach, FD and ATS are automatic if:
• N1 is more than 95% GA rating or,
• Pilot pushes the GA button or,
• Pilot advances throttles above 95% GA rating.
FD and ATS remain engaged throughout the windshear maneuver even after
reversion to TO or GA modes.
Windshear Guidance Reversion
During windshear guidance, selecting another pitch mode will terminate pitch
guidance (not a recommended procedure). Guidance can be resumed by pushing
the GA button (if below 1500 RA with slats and/or flaps extended).
When windshear no longer exists, all detection annunciations stop.
Windshear pitch and roll guidance will continue until safe conditions exist as
follows:
• Altitude is above 1000 feet RA and,
• Rate of climb is at least 750 fpm for 15 seconds and,
• If in TO, speed at least V2 +5 for 15 seconds.
• If in GA, speed at least Vref -5 for 15 seconds.
Takeoff Roll and Takeoff
The WAGS functions (windshear alerts, warnings, FMA annunciations, and auto
thrust increases) are inhibited during takeoff roll until nose gear liftoff.
When windshear is detected the alerts will appear on the PFD and FMA. The
precursor tone and associated aural warnings will sound through the CAWS.
When a windshear is detected, the amber or red WINDSHEAR on the PFD will
flash three times then remain steady. For decreasing performance windshear the
CAWS activates a tone followed by three cycles of WINDSHEAR.
Decreasing performance windshear alerting (red) has priority over increasing
performance windshear alerting (amber). When either windshear is detected on
takeoff, the ATS remains clamped (except FLEX, DERATE, or ALT TO where
the ATS unclamps, sets TO thrust, and reclamps).
The FMA speed, roll, and altitude windows will show changes in the WAGS
modes. For a decreasing performance windshear, the system will limit bank to 5
degrees, and will display HDG XXX degrees in the roll window and
WINDSHEAR in the speed and altitude windows of the FMA, (after flashing the
annunciations five times). For increasing performance windshear, the roll window
will retain TO heading while WINDSHEAR is displayed in the speed and altitude
windows after flashing five times.
October 02, 2006