SRS not engaging

[Garyo]

After departure, I noticed the SRS not active.  At about 200' agl, I put the A320 on AP 1.  The aircraft slowly pitched up and activated TOGA LOCK .  The auto thrust system seemed ok after passing the Thrust Reduction/ ACL altitude.  Has anyone else had this problem?

 

Thanks,

 

GaryO

[Alessio75]

Hi did you fill all the required fields in the MCDU?

[Garyo]

I'm pretty sure everything was done.  SRS should come on before 80kts.  

[Garyo]

SRS is now engaging.  The problem is it is not commanding V2 +10kts.  The indicated Magenta speed bug is to slow.

[SpottyMCapt]

The SRS mode engages automatically when the thrust levers are set to the TOGA or FLX/MCT detent (when a Flex takeoff temperature or Derated takeoff@ has been selected), providing:

• V2 has been inserted in the MCDU PERF TAKEOFF page

• The slats are extended

• The aircraft has been on ground for at least 30 s.

• SRS mode, the aircraft maintains a speed target equal to V2+10 kt in normal engine configuration. When the FMGS detects an engine failure, the speed target becomes the highest of V2 or current speed, limited by V2+15 kt.

  The SRS guidance law also includes:

• Attitude protection to reduce aircraft nose-up effect during takeoff (18 ° or 22.5 ° maximum in case of windshear)

• Flight path angle protection that ensures a minimum vertical speed of 120 ft/min

•  

  Note:

  If during takeoff the flight crew inadvertently sets an altitude on the FCU below the current altitude, the aircraft will remain in SRSmode unless the flight crew engages V/S mode.

• A speed protection limiting the target speed to V2+15 kt.