# AIRAC 2511 rev 3 missing ILS at ROAH **URL:** \ **Category:** ILS\ **Created:** [November 6, 2025, 6:57am UTC](https://forum.navigraph.com/t/airac-2511-rev-3-missing-ils-at-roah/21362 "2025-11-06T06:57:32Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![TonyChan](https://avatars.discourse-cdn.com/v4/letter/t/e274bd/32.png) [@TonyChan](https://forum.navigraph.com/u/TonyChan)\ **Post date:** [November 6, 2025, 6:57am UTC](https://forum.navigraph.com/t/airac-2511-rev-3-missing-ils-at-roah/21362/1 "2025-11-06T06:57:32Z")
Hi Navi Team, I didn’t backup navdata 2510, can I get the download link for older vesrion in your website as I wish to get back to previous work well version before problem solved. Thank you very much for resolve problems! ![image](https://europe1.discourse-cdn.com/flex013/uploads/navigraph1/original/3X/e/9/e9fa7d94e3c1c21c9f96bf36533a1e8e95e4017f.jpeg) ![image](https://europe1.discourse-cdn.com/flex013/uploads/navigraph1/original/3X/c/b/cbdd833ae78c45f77cd26fb798a36ef39037be95.jpeg) ---
**Author:** ![NAVData](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.navigraph.com/navdata/32/30549_2.png) [@NAVData](https://forum.navigraph.com/u/NAVData)\ **Post date:** [November 6, 2025, 7:55am UTC](https://forum.navigraph.com/t/airac-2511-rev-3-missing-ils-at-roah/21362/2 "2025-11-06T07:55:29Z")
Hi, No, we don´t offer any outdated AIRAC cycles. And I can´t really believe that the ILS 18R works well with ANY previous cycle, because this approach has an offset of 0.8° (for years!). Here are the charts for ROAH ILS18R: ![image](https://europe1.discourse-cdn.com/flex013/uploads/navigraph1/original/3X/9/6/966cda08b65976a5519102e55b79abd5917c3583.png) … and here a sat image, when you don´t believe it: ![image](https://europe1.discourse-cdn.com/flex013/uploads/navigraph1/original/3X/d/4/d49f291652a4cadb12ab4976d92f5a1e7a0aedae.jpeg) So, neither a missing ILS nor a navdata issue. The position is absolutely correct. Cheers, Richard ---
**Author:** ![TonyChan](https://avatars.discourse-cdn.com/v4/letter/t/e274bd/32.png) [@TonyChan](https://forum.navigraph.com/u/TonyChan)\ **Post date:** [November 6, 2025, 2:29pm UTC](https://forum.navigraph.com/t/airac-2511-rev-3-missing-ils-at-roah/21362/3 "2025-11-06T14:29:55Z")
Thanks Richard promptly replied! I remember it has signal at least DME but now seems nothing on PFD? ![image](https://europe1.discourse-cdn.com/flex013/uploads/navigraph1/original/3X/3/e/3e3478bc41ab88aae9a665069c501ce8716fbdf1.jpeg) ---
**Author:** ![TonyChan](https://avatars.discourse-cdn.com/v4/letter/t/e274bd/32.png) [@TonyChan](https://forum.navigraph.com/u/TonyChan)\ **Post date:** [November 6, 2025, 3:12pm UTC](https://forum.navigraph.com/t/airac-2511-rev-3-missing-ils-at-roah/21362/4 "2025-11-06T15:12:07Z")
I restored to my only very old navdata backup of 2401, it has ILS signal on my PFD also ILS arrow on map: ![image](https://europe1.discourse-cdn.com/flex013/uploads/navigraph1/original/3X/5/8/584fd7ba50d21e4055735a7f64a737abb3b1273c.jpeg) ---
**Author:** ![NAVData](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.navigraph.com/navdata/32/30549_2.png) [@NAVData](https://forum.navigraph.com/u/NAVData)\ **Post date:** [November 6, 2025, 3:31pm UTC](https://forum.navigraph.com/t/airac-2511-rev-3-missing-ils-at-roah/21362/5 "2025-11-06T15:31:26Z")
Hi, Can´t reproduce it … Stock Boeing 737, AIRAC 2511 rev. 3 installed - get a clear ILS signal as you see: ![image](https://europe1.discourse-cdn.com/flex013/uploads/navigraph1/original/3X/c/3/c3e6907d304b13a66b7ae1533da1b688484b87b3.jpeg) … but also on the Zibo B737: ![image](https://europe1.discourse-cdn.com/flex013/uploads/navigraph1/original/3X/2/6/267ab4caa6260d1ce2554d75a52d507669b47796.jpeg) Cheers, Richard ---
**Author:** ![TonyChan](https://avatars.discourse-cdn.com/v4/letter/t/e274bd/32.png) [@TonyChan](https://forum.navigraph.com/u/TonyChan)\ **Post date:** [November 6, 2025, 4:08pm UTC](https://forum.navigraph.com/t/airac-2511-rev-3-missing-ils-at-roah/21362/6 "2025-11-06T16:08:43Z")
OH super thanks! I reinstalled to latest rev3 of AIRAC 2511, all problem solved! Thank you very much! ---
**Author:** ![system](https://europe1.discourse-cdn.com/flex013/uploads/navigraph1/original/1X/4cc83e90d70ab312b1bd2d7527bddad309607265.png) [@system](https://forum.navigraph.com/u/system)\ **Post date:** [November 8, 2025, 4:09pm UTC](https://forum.navigraph.com/t/airac-2511-rev-3-missing-ils-at-roah/21362/7 "2025-11-08T16:09:02Z")
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