Coopere
Well-Known Member
- Joined
- Feb 11, 2015
- Messages
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Need some urgent advise / help
So I've been working towards my ifr flight test. During today's flight my narco 841 adf kinda quit working, I know recently during the past few months it's been unreliable.
Basically if I tune it to a local am radio station it works fine, but when I tune to an ndb sometimes it works sometimes it parks the needle.
I can identify an am radio station (listen to the music) in both ant and adf and adf bfo modes and the needle will point to the am radio station
Sometimes I can identify an ndb and it points to the station sometimes it will park the needle and I can't hear the station on either ant or adf but when it's acting up like this I can identify the station in adf bfo but it obviously won't work in this mode
Provided I can hear the Morse code in adf mode it will point to the station but this doesn't always happen
I know that this model narco has a "safety feature" where If the unit thinks the ndb station strenght isn't strong enough to complete an approach it silences the mores code and parks the needle.
I believe this is what's happening
Any suggestions on what to try? I have to have it functioning for the flight test, or I would have to get another gps installed to replace it if I don't use an adf
Unfortunately my aircraft doesn't have dme equipment
Most of our approaches have the faf as an ndb so it becomes a legal issue for filing ifr
The equipment I have are as follows
Gns 430w
Sl30 Nav/com
Narco 841 adf
So basically 2 vor's both with ils capabilities
And wass gps
And adf
The issue that comes up is if I tag the adf as "INOP" for the flight test and I'm flying say the localizer 30 approach into cyhm the faf is the binbrook beacon. I can use the 430w to identify the faf, the missed approach is based on a different beacon the ancastor beacon, if the 430 fails then I have no way of identifying the beacon for the missed approach, (but if my adf works then all would be ok)
Their is 1 local airport that could be filed as an alternate provided I had dme (another source than the 430 (assuming the 430 is failed)) but dme equipment is fairly expensive not to mention most vor's/dme are being de commissioned up here in Canada
Looking for some suggestions, I think my options are very limited either fix/replace with a serviceable adf or pull it and get a second gps
Anyone know of a good place to have my narco repaired?
I've attached he plate for the approaches at cyhm even the ils uses a ndb so pretty screwed if the adf doesn't work and if the 430 fails
Thanks guys
So I've been working towards my ifr flight test. During today's flight my narco 841 adf kinda quit working, I know recently during the past few months it's been unreliable.
Basically if I tune it to a local am radio station it works fine, but when I tune to an ndb sometimes it works sometimes it parks the needle.
I can identify an am radio station (listen to the music) in both ant and adf and adf bfo modes and the needle will point to the am radio station
Sometimes I can identify an ndb and it points to the station sometimes it will park the needle and I can't hear the station on either ant or adf but when it's acting up like this I can identify the station in adf bfo but it obviously won't work in this mode
Provided I can hear the Morse code in adf mode it will point to the station but this doesn't always happen
I know that this model narco has a "safety feature" where If the unit thinks the ndb station strenght isn't strong enough to complete an approach it silences the mores code and parks the needle.
I believe this is what's happening
Any suggestions on what to try? I have to have it functioning for the flight test, or I would have to get another gps installed to replace it if I don't use an adf
Unfortunately my aircraft doesn't have dme equipment
Most of our approaches have the faf as an ndb so it becomes a legal issue for filing ifr
The equipment I have are as follows
Gns 430w
Sl30 Nav/com
Narco 841 adf
So basically 2 vor's both with ils capabilities
And wass gps
And adf
The issue that comes up is if I tag the adf as "INOP" for the flight test and I'm flying say the localizer 30 approach into cyhm the faf is the binbrook beacon. I can use the 430w to identify the faf, the missed approach is based on a different beacon the ancastor beacon, if the 430 fails then I have no way of identifying the beacon for the missed approach, (but if my adf works then all would be ok)
Their is 1 local airport that could be filed as an alternate provided I had dme (another source than the 430 (assuming the 430 is failed)) but dme equipment is fairly expensive not to mention most vor's/dme are being de commissioned up here in Canada
Looking for some suggestions, I think my options are very limited either fix/replace with a serviceable adf or pull it and get a second gps
Anyone know of a good place to have my narco repaired?
I've attached he plate for the approaches at cyhm even the ils uses a ndb so pretty screwed if the adf doesn't work and if the 430 fails
Thanks guys
