stall horn

[Atccfi]

Will someone point me to the correct far that says that a stall horn is required in order for an aircraft to be airworthy. I've never seen it, but just trying to settle a small disagreement. Thanks.

 

[CA1900]

This is probably what you're looking for. If the airplane exhibits a stall warning by its "inherent aerodynamic qualities," it doesn't need an artificial stall warning. If flight tests prove it doesn't, then an artificial one is needed.



Title 14--Aeronautics and Space
CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION
Part 23: AIRWORTHINESS STANDARDS: NORMAL, UTILITY, ACROBATIC, AND COMMUTER CATEGORY AIRPLANES

Section 23.207: Stall warning.

(a) There must be a clear and distinctive stall warning, with the flaps and landing gear in any normal position, in straight and turning flight.

(b) The stall warning may be furnished either through the inherent aerodynamic qualities of the airplane or by a device that will give clearly distinguishable indications under expected conditions of flight. However, a visual stall warning device that requires the attention of the crew within the cockpit is not acceptable by itself.

(c) During the stall tests required by §23.201(b) and §23.203(a)(1), the stall warning must begin at a speed exceeding the stalling speed by a margin of not less than 5 knots and must continue until the stall occurs.

(d) When following procedures furnished in accordance with §23.1585, the stall warning must not occur during a takeoff with all engines operating, a takeoff continued with one engine inoperative, or during an approach to landing.

(e) During the stall tests required by §23.203(a)(2), the stall warning must begin sufficiently in advance of the stall for the stall to be averted by pilot action taken after the stall warning first occurs.

(f) For acrobatic category airplanes, an artificial stall warning may be mutable, provided that it is armed automatically during takeoff and rearmed automatically in the approach configuration.

 

[transpac]

If the the type data certificate for the airplane lists a stall warning system, 91.213 requires it to be operative.

 

[minitour]

anyone have a STC for a stickshaker/pusher on a 172?

-mini

 

[prpjt]

CA1900's reference was spot on. Another reference is the POH equipment list for the plane (though not actually a reg like you were asking for)

Not sure about Piper, but if your Cessna is a fairly recent model check the POH. In the equipment list, each installed item will have a designator out beside it. It'll be either an "O", an "R" and there is one other one. If it has an "R" it is Required equipment. The "O" is for optional.

 

[BoDEAN]

So if a 1999 Cessna 172SP has an INOP Stall Warning Horn, it wouldn't be airworthy to fly? Going to have to check this. I recall one of our aircraft having an inop horn

 

[midlifeflyer]

So if a 1999 Cessna 172SP has an INOP Stall Warning Horn, it wouldn't be airworthy to fly?

Correct. In fact, just go to the equipment list in the POH. You'll see that nice big fat "R" next to "Pneumatic Stall Warning System"

 

[Metro752]

Will someone point me to the correct far that says that a stall horn is required in order for an aircraft to be airworthy. I've never seen it, but just trying to settle a small disagreement. Thanks.

If ya look in the airplanes equipment list, like Midlife said, if it has a big fat R, you need to have it working! Derrrrrrrrrrrrrrrrrrrrrr... BTW someone just bombed Iran!

 

[midlifeflyer]

I just realized that no one really answered the original question.

The regulation that requires the stall warning to be operative is 91.213(d) (assuming the aircraft doesn't have an MEL) Everything else we've talked about, certification rules, "R"s on equipment lists, are just part of the process that tells us if it's required equipment for 91.213(d) purposes.

 

[Metro752]

If ya look in the airplanes equipment list, like Midlife said, if it has a big fat R, you need to have it working! Derrrrrrrrrrrrrrrrrrrrrr... BTW someone just bombed Iran!

Looks like no one bombed Iran, but their state news is really anxious to get bombed, so they even made this false report this morning. *Sigh* Oh well.

Thanks for the into Midlife.