Piper Flyer Association - Technical Know-how, Serious Fun read more

Topic-icon Stall Warning will not work in flight.

  • Ron Ellard
  • Ron Ellard's Avatar Topic Author
  • Offline
  • Subscriber
  • Subscriber
More
11 months 3 weeks ago #1654

I have just procured a 1976 PA-28-181 Archer II. The ground check for the stall warning horn works fine, as per the POH. However, in flight I cannot get the horn to work, regardless of what Angle of Attack, and airspeed that I put the aircraft in. I have searched high and low for an answer to this issue. Anybody have any ideas?

Please Log in to join the conversation.

More
11 months 6 days ago #1691

I suggest you remove the plate that the lift detector is screwed onto, and see if you can loosen the screws holding the detector in position. Once the screws are loosened, I believe you'll be able to move the detector in the plate. Re-position the detector and fly. If this is mounted in the way I think it is, you'll be able to re position the detector so it the "impending stall" light will come on a few knots before the actual stall.
Let me know what you find.

Please Log in to join the conversation.

  • Ron Ellard
  • Ron Ellard's Avatar Topic Author
  • Offline
  • Subscriber
  • Subscriber
More
10 months 3 weeks ago #1716

Steve

Thanks for the reply. I have done as you have suggested and have flown the aircraft with the angle of attack tab adjusted from one limit of adjustment to the other limit. I have only been able to get a little beep out of the stall warning system at extreme pitch angles in deep stall. Would you happen to know if a person can bend or change the angle on the tab itself? I suspect that the tab may have been bent in some previous life.

Please Log in to join the conversation.

More
10 months 2 weeks ago #1717

Hi Ron;
I expect we might be able to get that information from Safe Flight; I believe that's the company that produced the stall vane switches but I suggest you find another cherokee on your local field and take a look at the stall vane angle on it.
I am going to the airport in an hour and will take some photos of the ones here and post the pictures later today.

Please Log in to join the conversation.

More
10 months 2 weeks ago #1720

Hi Ron, I took pictures of the stall vanes on two different PA 28s.
The tab is not bent at a 90 degree angle.
And both tabs moved upward very easily.
See attached photos

Attachments:

Please Log in to join the conversation.

  • Ron Ellard
  • Ron Ellard's Avatar Topic Author
  • Offline
  • Subscriber
  • Subscriber
More
10 months 2 weeks ago #1722

As per my quick message here is the photo of my unit.

Attachments:

Please Log in to join the conversation.

Time to create page: 1.934 seconds