Greetings, teams

I have been testing the A380 across various gross weights on both v1.0.0 and v1.0.1 (streamed and downloaded versions) and both RR and EA Versions. I’m experiencing consistent pitch and rate-of-descent issues specifically during Flaps 3 landings with All Engines Operating (AEO), occurring on both manual and automatic approaches (single or dual AP).

Observed Behavior:

1. Pitch Oscillation (Flaps 3 AEO):

   • Passing 800 ft AGL: The aircraft begins oscillating ~0.5° (ANU/AND).

   • Passing 500 ft AGL: Oscillation increases to ~1.0°.

   • Passing 300 ft AGL: Oscillation worsens to ~2.0°–2.5°.

2. VSI/Pitch Discrepancy Below 1,000 ft:

   • Hand-flying (having Manual Approaches) below 1,000 ft at a constant 2.5° ANU initially gives a normal 700–800 fpm descent.

   • Upon passing 400 ft, without any pitch input change, the rate of descent unexpectedly spikes to 1,000–1,200 fpm (triggering GPWS sink rate alerts 😂).

   • Passing 250 ft, the VSI drops back to 900 fpm, and stabilizes back around 700–800 fpm below 100 ft—all while holding the exact same pitch attitude.

Note: This behavior does not occur in Flaps FULL under identical conditions (manual or autoland).

Could you please look into the pitch stability and ground effect/flight dynamics modeling for Flaps 3 approaches?

Many Thanks, Cheers!

~HaveASafeFlight!

Edited 4 hours ago4 hr by OxkyGThaib

2 hours ago, OxkyGThaib said:

Greetings, teams

I have been testing the A380 across various gross weights on both v1.0.0 and v1.0.1 (streamed and downloaded versions) and both RR and EA Versions. I’m experiencing consistent pitch and rate-of-descent issues specifically during Flaps 3 landings with All Engines Operating (AEO), occurring on both manual and automatic approaches (single or dual AP).

Observed Behavior:

1. Pitch Oscillation (Flaps 3 AEO):

   • Passing 800 ft AGL: The aircraft begins oscillating ~0.5° (ANU/AND).

   • Passing 500 ft AGL: Oscillation increases to ~1.0°.

   • Passing 300 ft AGL: Oscillation worsens to ~2.0°–2.5°.

2. VSI/Pitch Discrepancy Below 1,000 ft:

   • Hand-flying (having Manual Approaches) below 1,000 ft at a constant 2.5° ANU initially gives a normal 700–800 fpm descent.

   • Upon passing 400 ft, without any pitch input change, the rate of descent unexpectedly spikes to 1,000–1,200 fpm (triggering GPWS sink rate alerts 😂).

   • Passing 250 ft, the VSI drops back to 900 fpm, and stabilizes back around 700–800 fpm below 100 ft—all while holding the exact same pitch attitude.

Note: This behavior does not occur in Flaps FULL under identical conditions (manual or autoland).

Could you please look into the pitch stability and ground effect/flight dynamics modeling for Flaps 3 approaches?

Many Thanks, Cheers!

~HaveASafeFlight!

Hi,

Thanks for your feedback, as always! I will note this for the team to review.

Thanks again!