KLN-94 won't go Direct to IAP - advice requested

[BigBadLou]

I am training for my IR in an airplane with a KLN-94 and have trouble activating an approach.
(Disclaimer: if you want to tell me how great your 430, Aspen or G1000 is, you are in the wrong thread, please exit now)

It worked fine before. So I assume I am doing it wrong.

I follow the standard procedure:
- Direct to the nearby training destination (less than 30nm), Enter, Enter
- PROC button, choose the destination airport, choose the IAP, choose the IAF, add to FPL 0.
- Then I try to go Direct IAF but can't. I think that's where it all goes wrong.
- So we just follow the approach overlay on the map and fly the procedure (I know, not correct, but we are only practicing with the CFII at this point) and then once past IF, we activate VTF. The GPS still does not sequence or drop the needle sensitivity.

I consulted the Qref guide but it only confirmed that I am following the correct input sequence.
If you have experience with KLN-94 and have the inputs memorized, please share how you activate the approach.

Thanks
Lou

 

[anjacob]

After adding it to the flight plan, have you pushed PROC again and selected activate?

 

[Axtel4]

- Direct to the nearby training destination (less than 30nm), Enter, Enter
- PROC button, choose the destination airport, choose the IAP, choose the IAF, add to FPL 0.
- Scroll to and select FPL0 if not already there.
- Press the CRSR button and scroll up to the IAF waypoint (WAYPOINTi) with the outer and inner knobs.
- Press the -D-> button
- Press the ENT button.
- The KLN-94 will sequence through the approach as it is flown.

To continue to the Hold fix:
- Scroll to and select FPL0 if not already there.
- Press the CRSR button and scroll down to the HOLD waypoint (WAYPOINTh) with the outer and inner knobs.
- Press the -D-> button
- Press the ENT button.
- The KLN-94 will sequence to the Hold.

Edit: Added Hold sequence.

 

[taters]

- Direct to the nearby training destination (less than 30nm), Enter, Enter
- PROC button, choose the destination airport, choose the IAP, choose the IAF, add to FPL 0.
- Scroll to and select FPL0 if not already there.
-*Press the CRSR button and scroll up to the IAF waypoint (WAYPOINTi) with the outer and inner knobs.
-*Press the -D-> button
-*Press the ENT button.
-*The KLN-94 will sequence through the approach as it is flown.

This ^^

 

[Clark1961]

In the finest POA tradition is now time to tell the OP to get a 650 and a new CFII?

 

[BigBadLou]

After adding it to the flight plan, have you pushed PROC again and selected activate?

I believe so. Will try tonight.

- Direct to the nearby training destination (less than 30nm), Enter, Enter
- PROC button, choose the destination airport, choose the IAP, choose the IAF, add to FPL 0.
- Scroll to and select FPL0 if not already there.
- Press the CRSR button and scroll up to the IAF waypoint (WAYPOINTi) with the outer and inner knobs.
- Press the -D-> button
- Press the ENT button.
- The KLN-94 will sequence through the approach as it is flown.

Thanks, that's what the QRM has, will try again tonight.

In the finest POA tradition is now time to tell the OP to get a 650 and a new CFII?

Still waiting on those.


Thanks a lot for the actually helpful posts, guys! Will post back results after tonight's lesson.

 

[Jaybird180]

Also check if the GPS is in the LEG Mode. IIRC it will not sequence if in the LEG mode.

Thanks Axel4 for the correction. I had my modes reversed.

The KNL-94 will need to be in LEG mode to sequence the approach.

If flying a Hold as the procedure turn, select OBS mode before crossing the Hold waypoint the first time. Fly the hold and on the inbound leg prior to crossing the hold waypoint the last time return to the LEG mode. The OBS mode holds the KLN-94 sequence at the Hold waypoint until you are ready to proceed with the rest of the approach.

If one forgets to select the OBS mode before crossing the Hold waypoint the first time, the KLN-94 will sequence to the next waypoint in the approach before the hold is flown.

 

[Jaybird180]

BTW- King makes a training DVD for the KLN-94. I own a copy and recommend it.

 

[Axtel4]

The KNL-94 will need to be in LEG mode to sequence the approach.

If flying a Hold as the procedure turn, select OBS mode before crossing the Hold waypoint the first time. Fly the hold and on the inbound leg prior to crossing the hold waypoint the last time return to the LEG mode. The OBS mode holds the KLN-94 sequence at the Hold waypoint until you are ready to proceed with the rest of the approach.

If one forgets to select the OBS mode before crossing the Hold waypoint the first time, the KLN-94 will sequence to the next waypoint in the approach before the hold is flown.

 

[wilkersk]

I bought a Qref checklist for the KLN-94. Its much better than trying to dig what you need out of the manual. It has a step-by-step checklist for setting up and flying the approach as well as quick reference pages for the KLN-94 gotchas (like forgetting to activate "vectors").

 

[coloradobluesky]

Sometimes they wont sequence because you are ENTERING the approach wrong (too great an angle). There used to be some requirements for fly over vs fly by waypoints too. Not sure what the current status of those items are now.

 

[fiveoboy01]

I bought a Qref checklist for the KLN-94. Its much better than trying to dig what you need out of the manual. It has a step-by-step checklist for setting up and flying the approach as well as quick reference pages for the KLN-94 gotchas (like forgetting to activate "vectors").

I have one for my 430W and I like it. Easy to flip through and find what you need.

 

[dmspilot]

- Then I try to go Direct IAF but can't.

Axtel answered your question, but I am wondering what you meant here. What did you try? What couldn't you do?

Note that the initial approach fix (for example, TULOY on the DFW 31R approach) when loaded as part of the approach will have a lower-case i after it and will show up on the screen as "TULOYi". Likewise, if I remember correctly, the final approach fix will have a lower-case f after it, the missed approach point an m, and the missed approach hold an h.

If you just hit the direct to button and type in TULOY, that will not work. You have to select TULOYi from the flight plan as Axtel described and go direct to that--the active waypoint becomes TULOYi and seeing the i at the end helps let you know you set up the approach correctly.

 

[wilkersk]

..........If you just hit the direct to button and type in TULOY, that will not work. You have to select TULOYi from the flight plan as Axtel described and go direct to that.........

Also if you try to put TULOY in the flight plan, then add the IAP from procedures with TULOY as the initial, I think you end up with TULOY in the flight plan twice, and that can cause some confusion. This has happened to me before.

 

[Jaybird180]

Sometimes they wont sequence because you are ENTERING the approach wrong (too great an angle). There used to be some requirements for fly over vs fly by waypoints too. Not sure what the current status of those items are now.

KLN-94 does both types of waypoints. In the manual you would lookup "turn anticipation".

 

[dmspilot]

Also if you try to put TULOY in the flight plan, then add the IAP from procedures with TULOY as the initial, I think you end up with TULOY in the flight plan twice, and that can cause some confusion. This has happened to me before.

Agree, I have seen that happen also.

 

[Henning]

It's been a while since I used a BK, but I remember my most common error was not having the proper field selected when hitting D to get it going.

 

[BigBadLou]

UPDATE: Tried last night on the ground (due to maintenance problems with the local shop *sigh*) and managed to set DirectTo the IAF. So obviously we were not doing it right.

Also check if the GPS is in the LEG Mode. IIRC it will not sequence if in the LEG mode.

Very good suggestion. And yup, we're in LEG mode most of the time, unless flying GPS holds.

BTW- King makes a training DVD for the KLN-94. I own a copy and recommend it.

Care to pass on the DVD to good hands? Once I am done with it, I can pas it on to other IR students here. It could be a PoA IR student baton.

The KNL-94 will need to be in LEG mode to sequence the approach.

Absolutely.

I bought a Qref checklist for the KLN-94.

Got the same one in the plane. Very useful.

Sometimes they wont sequence because you are ENTERING the approach wrong (too great an angle). There used to be some requirements for fly over vs fly by waypoints too. Not sure what the current status of those items are now.

On the RNAV approaches, you can usually fly to the IAF from any direction, IIRC.

Axtel answered your question, but I am wondering what you meant here. What did you try? What couldn't you do?
...
If you just hit the direct to button and type in TULOY, that will not work. You have to select TULOYi from the flight plan as Axtel described and go direct to that--the active waypoint becomes TULOYi and seeing the i at the end helps let you know you set up the approach correctly.

I think you hit it the nail on the head, I believe we were forgetting to add the approach to the FPL0.

When we could not sequence the IAF, we were in the air, busy in the cockpit and we made a decision not to troubleshoot and bust an airspace or something and instead proceed with the approach overlay on the GPS moving map. It was a good decision to fly the plane instead of trying to replace a bulb and end up in the everglades.

Also if you try to put TULOY in the flight plan, then add the IAP from procedures with TULOY as the initial, I think you end up with TULOY in the flight plan twice, and that can cause some confusion. This has happened to me before.

The KLN has a great feature where it will notify you of duplicate WP and let you edit the FPL.

KLN-94 does both types of waypoints. In the manual you would lookup "turn anticipation".

The great thing is that you can enable/disable the feature. For those who cannot live without it or hate it.

It's been a while since I used a BK, but I remember my most common error was not having the proper field selected when hitting D to get it going.

Oh yes, been there, done that! Common mistake which I did not know about until I made it.

 

[Palmpilot]

If you just hit the direct to button and type in TULOY, that will not work. You have to select TULOYi from the flight plan as Axtel described and go direct to that..

I found that out the hard way!