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FMC : Desc path not achievable

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Today I got the message 'Desc path not achievable' on the CDU. I was doing a DME Arc approach to Monastir ( DTMB ) and during the last 30 miles I got the above message.The calculated speed was 240 knots. To my surprise the V/S was just -800.Surely with higher V/S this would not have been a problem.I tried with Speedbrakes on, but then the throttles came up .... Of coarse I can use V/S instead of VNAV, but normally this should have been possible. Where did I go wrong ?

5950x3d 5.4-5.7 GHz - Asus ROG 870 Crosshair Apex - GSkill Neo 2x 24 Gb 6000 mhz / cas 26 -  MSI RTX 5090 Gaming Trio OC - 1x SSD M2 6000 2TB - 1x SSD M2 2800/1800 1Tb -  Corsair 5400  case - Corsair 360 liquid cooling set  - 3x 75’ TCL tv.

13600  6 cores @ 5.1 GHz / 8 cores @ 4.0 GHz (hypterthreading on) - Asus ROG Strix Gaming D - GSkill Trident 4x Gb 3200 MHz cas 15 - Asus TUF RTX 4080 16 Gb  - 1x SSD M2 2800/1800 2TB - 2x  Sata 600 SSD 500 Mb - Corsair D4000 Airflow case - NXT Krajen Z63 AIO liquide cooling - 

FOV : 200 degrees

My flightsim vids :  https://www.youtube.com/user/fswidesim/videos?shelf_id=0&sort=dd&view=0

 

On the ND, how high above the VNAV path does it show you are?

Di Agron

 

Dell XPS 15 L502X | Intel i5-2540m @ 2.60GHz | 4GB DDR3 1333MHz (2x2GB) | nVidia GT525M | Seagate 500GB 7200RPM | 15" 1366x768 | 23" LG 1360x768 |

 

Got a hardware question? Ask:

 

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PMDG FMC NavData out of date message fix HERE

View this video by a real NG pilot about catching up with you VNAV path - http://forum.avsim.net/topic/344441-do-you-really-need-speedbrakes-video/page__view__findpost__p__2065410

Jordan Gregory

 

MOBO: MSI P67A-C45 (B3) CPU: Intel i5-2500K @ 3.8GHz RAM: 8GB Corsair XMS3 DDR3 @1600MHz GPU: NVIDIA 1GB GTX 560 @ 900MHz CASE: Antec 300 PSU: Rasurbo 650W GaminX HDD: Western Digital Caviar Black 1TB OS: Windows 7 Home Premium 64 Bit

  • Author

Thanks for the link ! When looking at the ND I was about 400ft too high.Without VNAV I could manage it, but I am sure it has to work with VNAV too. I arrived well in Monastir

5950x3d 5.4-5.7 GHz - Asus ROG 870 Crosshair Apex - GSkill Neo 2x 24 Gb 6000 mhz / cas 26 -  MSI RTX 5090 Gaming Trio OC - 1x SSD M2 6000 2TB - 1x SSD M2 2800/1800 1Tb -  Corsair 5400  case - Corsair 360 liquid cooling set  - 3x 75’ TCL tv.

13600  6 cores @ 5.1 GHz / 8 cores @ 4.0 GHz (hypterthreading on) - Asus ROG Strix Gaming D - GSkill Trident 4x Gb 3200 MHz cas 15 - Asus TUF RTX 4080 16 Gb  - 1x SSD M2 2800/1800 2TB - 2x  Sata 600 SSD 500 Mb - Corsair D4000 Airflow case - NXT Krajen Z63 AIO liquide cooling - 

FOV : 200 degrees

My flightsim vids :  https://www.youtube.com/user/fswidesim/videos?shelf_id=0&sort=dd&view=0

 

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