Hi.

 

I would like to ask you about "TOO LOW FLAPS" warning in SP1.

 

I often do Touch and Go training with 77L, and at that time, T/O flaps are 15 and APCH flaps are 20.

With SP1, "TOO LOW FLAPS" warning awakes below 300ft, while it wouldn't WITHOUT SP1.

 

Configurations and operations are following.

 

* Fuel and Payload are 10%

* In RTE page, same ARP is set to ORIG and DEST (RJGG), without any airways and fixes.

* Departure and Landing RWY  are selected (36), without any SID, ARR and IAP.

* PREFs are filled (Alt 1500, TO2/CLB2, Flaps 15 etc). 

* In APPROACH page, flaps and speeds are set to "20/138".

* Take-off WITHOUT TO/GA switch, and flaps remain 15, then fly traffic pattern completely manually.

* At abeam threshold, set flaps to 20, lower gears, and make approach to RWY.

  (At about 300ft AGL, "TOO LOW FLAPS" awakes, and it calms down at 20ft.)

* After touch down, set flaps to 15, thrust to 85% manually, then continue.

 

I'm not sure this is right, but at least WITHOUT SP1, there were no problems.  I think there are two possibility.

 

1. My configs and operations have been wrong so the WARNING should have awake but not by original bugs. This time, it was fixed in SP1.

2. This is a new bug of SP1.

 

Anyway, does anyone has any idea about this issue?

If it caused by my wrong settings or operations, I would really appreciate telling me proper way of T/G trainings with 77L.

 

 

Shunsuke Yamabe

Hi.

 

I would like to ask you about "TOO LOW FLAPS" warning in SP1.

 

I often do Touch and Go training with 77L, and at that time, T/O flaps are 15 and APCH flaps are 20.

With SP1, "TOO LOW FLAPS" warning awakes below 300ft, while it wouldn't WITHOUT SP1.

 

Configurations and operations are following.

 

* Fuel and Payload are 10%

* In RTE page, same ARP is set to ORIG and DEST (RJGG), without any airways and fixes.

* Departure and Landing RWY  are selected (36), without any SID, ARR and IAP.

* PREFs are filled (Alt 1500, TO2/CLB2, Flaps 15 etc). 

* In APPROACH page, flaps and speeds are set to "20/138".

* Take-off WITHOUT TO/GA switch, and flaps remain 15, then fly traffic pattern completely manually.

* At abeam threshold, set flaps to 20, lower gears, and make approach to RWY.

  (At about 300ft AGL, "TOO LOW FLAPS" awakes, and it calms down at 20ft.)

* After touch down, set flaps to 15, thrust to 85% manually, then continue.

 

I'm not sure this is right, but at least WITHOUT SP1, there were no problems.  I think there are two possibility.

 

1. My configs and operations have been wrong so the WARNING should have awake but not by original bugs. This time, it was fixed in SP1.

2. This is a new bug of SP1.

 

Anyway, does anyone has any idea about this issue?

If it caused by my wrong settings or operations, I would really appreciate telling me proper way of T/G trainings with 77L.

 

 

Shunsuke Yamabe

This is correct behaviour now. It was wrong in the RTM version. To stop the warning you need to set the GPWS FLAPS OVERRIDE switch on the front panel. The QRH will direct you to do it whenever you plan to land with flap 20. Note that flap 20 is normally a 'non-normal' landing configuration.

 

It was also wrongly modeled in the NGX - Something SP2 for that will hopefully correct.

 

Adam Turley 

Now I completely understood and I could suppress warnings.

Thank you so much.

That is what EGPWS alert mode 4B does. It alerts you of wrong flap settings when landing gear is extended during approach and certain conditions are met. Just like it's done in real life, you should inhibit it by pushing the FLAP OVRD switch on the GND PROX section in the Landing Gear Panel..