Piedmont Airlines News & Rumors
#3371
In a land of unicorns
Joined APC: Apr 2014
Position: Whale FO
Posts: 6,404
In real life, the autopilot would decouple if the CDI suddenly goes full deflection.
#3372
Gets Weekends Off
Joined APC: Feb 2019
Posts: 131
In a perfect world, maybe. I’ve had several airplanes at PDT do this. I just press the little red button and hand-fly the approach, but it’s still disconcerting. Write ups generally end with “Could not duplicate- ok for service” BS... Major changes will need to happen before we’re authorized for CAT II. Maybe an ASAP along with the maintenance write up is a good start to draw some attention to the issue??
#3373
In a land of unicorns
Joined APC: Apr 2014
Position: Whale FO
Posts: 6,404
In a perfect world, maybe. I’ve had several airplanes at PDT do this. I just press the little red button and hand-fly the approach, but it’s still disconcerting. Write ups generally end with “Could not duplicate- ok for service” BS... Major changes will need to happen before we’re authorized for CAT II. Maybe an ASAP along with the maintenance write up is a good start to draw some attention to the issue??
#3374
Gets Weekends Off
Joined APC: Jul 2017
Posts: 1,729
I guess you haven't been on a 145 going down to minimums and at 300 ft AGL the cdi fully deflects and a 30 degree bank is commanded by the autopilot. Happened to me twice... I'm still cleaning the poop off my undies.
We have had a problem with the transceivers being exposed to moisture and causing the issues we have seen across the fleet. Last time I talked with the roa avionics guy he said the ground test is useless because you have to be in moisture to get the erratic cdi swings. They are working on fixing the fleet but unfortunately they don't get focused on unless they are written up.
We have had a problem with the transceivers being exposed to moisture and causing the issues we have seen across the fleet. Last time I talked with the roa avionics guy he said the ground test is useless because you have to be in moisture to get the erratic cdi swings. They are working on fixing the fleet but unfortunately they don't get focused on unless they are written up.
#3375
Assuming you're in IMC, even if you click the autopilot off and hand fly, how are you aligning the aircraft with the runway without positive course guidance? Continuing the approach in IMC with the CDI swinging wildly left and right maaaay justify a missed approach call for being unstable. Sounds like risky business trying to continue under such conditions.
Airplanes going around and or diverting for unreliable navigation equipment has ASAP written all over it. Write it up. Make them fix it.
Airplanes going around and or diverting for unreliable navigation equipment has ASAP written all over it. Write it up. Make them fix it.
#3376
Gets Weekends Off
Joined APC: Oct 2018
Posts: 564
Unfortunately we have a lack of people writing it up... usually I get to the plane and the previous fo says oh it was a little weird coming in and having difficulty tracking the loc...
There have been a few incidents now of places not properly tracking the localizer. It's in the asap scorecard.
We had a big problem a few years ago on the dash at clt... some of the older guys may know the story as well.
And yes, once I see a swing and unexpected deviation of the cdi it's get out of dodge... do the rnav or divert.. the mel for a loc inop pretty much kills the plane where it is.
There have been a few incidents now of places not properly tracking the localizer. It's in the asap scorecard.
We had a big problem a few years ago on the dash at clt... some of the older guys may know the story as well.
And yes, once I see a swing and unexpected deviation of the cdi it's get out of dodge... do the rnav or divert.. the mel for a loc inop pretty much kills the plane where it is.
#3377
Gets Weekends Off
Joined APC: Oct 2018
Posts: 564
#3378
In a land of unicorns
Joined APC: Apr 2014
Position: Whale FO
Posts: 6,404
When weather is above that, pilots should inform ATC if you are flying a coupled approach.
Some airports are very consistent with these distortions.
It's all in the AIM.
k. ILS Course Distortion 1. All pilots should be aware that disturbances to ILS localizer and glide slope courses may occur when surface vehicles or aircraft are operated near the localizer or glide slope antennas. Most ILS installations are subject to signal interference by either surface vehicles, aircraft or both. ILS CRITICAL AREAS are established near each localizer and glide slope antenna.
#3380
Gets Weekends Off
Joined APC: Feb 2019
Posts: 131
Once and it resulted in a missed. The rest have been visual. Interference on 27R is common, but I don’t think that’s been the cause every single time at different airports. This is a known issue that needs to be officially documented instead of the typical “oh by the way..” during the jetbridge social hour.
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