As a CFI candidate, I feel like I should know the answer to this one. I asked a couple of other CFIs I know and got two different answers, but both were unsure about it, which made me feel a little better.
I went to go fly last night - PA-28R/200, 1976 model. There is a red strobing beacon installed on the vertical stabilizer, which I determined was INOP during preflight.
The beacon wasn't part of the type certificate, and it's not required by 91.205 given that the plane has the appropriate position and anti-collision lights.
My issue is thus: if I understand the regs correctly, if it's attached to the airplane, it has to be deactivated and placarded by appropriate maintenance personnel. I don't think I meet that requirement. The light is activated by the split-rocker switch on the panel and it did not appear to have a separate breaker, but even if it did, I'm not sure that I'm authorized to placard it as INOP and then go fly.
So I noted it in the squawk book, notified the club maintenance guy and switched to another airplane.
Could I have placarded that thing and flown it legally?
43 appendix A allows you to repair decorative coatings of the interior, I always figured replacing or adding a placard counted for that.
I neglected to add:
91.213d (2) and (3)
(3) outlines that, in your case, you must deactivate and placard the inoperative equipment. It then says that if deactivation requires maintenance that must be recorded in the logbook.
My interpretation was always that turning the switch off constituted deactivation and no maintenance is required so no log entry is required, the placard can be installed by you.
This is fine for a landing light... But the bad news is that 91.209 says that an anti collision light, if installed, must be operating, and 213d(2) says "required by 91.205 or any other rule under this part"
So while it applies to the landing light, I think you're out of luck on the beacon.
I get what you're saying there, but I believe that isn't what 'deactivate' means. "Disabling" might be a better word to use in THIS case because a light either works or it doesn't. But let's say you've got a failing AI...it's not required for day VFR and (if it's not on the type certificate) it would need to be completely deactivated by a mech and then placarded. "Deactivate" means (I think) "render this inoperative or partially inoperative device COMPLETELY inoperative."
I concur.
Ok, so a couple disclaimers before I give my opinion.
1, I’ve never really dealt with this much as a non A&P rated pilot, as the place I trained at had a policy that all the placarding etc was handled by mx
2, most of my time since training has been in 135 where either you have an MEL that lays out how to deal with this or you have to ground the airplane to fix or remove the equipment.
My gut instinct is yes, you could. Unfortunately, I don’t have an AC or anything to back it up. What might be educational though is to look at how the FAA handles MELs for aircraft that have them. In every MEL I’ve seen the flight crew can placard the inoperable equipment.
@trafficinsight ’s point about markings etc being preventive maintenance is a good one and not something I’d thought about. Also in the MELs I’m familiar with something like a light is considered to be deactivated if it is switched off.
The landing light troubleshooting issue is a red herring imho, my understanding for that was always that it was specifically in there so it was legal for a pilot to unhook and hook up landing light wiring for aircraft (like your PA28) with the landing light mounted to the cowl (or reconnect it if the mechanic forgot to).
I also think the 91.209 issue is a red herring, for 2 reasons. 1, in general, with reference to required instruments and equipment, the FAA treats inoperable equipment as if it were not installed (see: transponders, RVSM, etc). So I don’t think that merely having one of two installed anti collision light systems inoperable puts you in violation. 2, you still have the wingtip strobes which should meet the requirements of the rule to have an anti collision light system illuminated (except on the ramp when you’re blinding everyone next to you of course).
If you have any pull with your club it would not be a bad idea to see if you can’t get a written policy instituted so that everyone in the club is on the same page when this type of thing comes up.
And finally I feel compelled to point out that this is part 91, and honestly unless you’re taking a checkride or doing something to blatantly draw the attention of the federales no one except you is going to care, and in both of those cases what the rule and it’s interpretations say means less than the individual inspector’s pet interpretation. Which makes it both simpler and more difficult in a way.