Compass cracked - bird strike

traumamed

Filing Flight Plan
Joined
Apr 1, 2023
Messages
28
Display Name

Display name:
traumamed
For those who want the details, they are below. The TL;DR is: I need to replace my compass. Does this fall under pilot-performed maintenance like basic R&R of other instruments, or does this one need an A&P or even a specialist avionics shop? I am unsure due to the fact compasses are calibrated, and whether that happens at the factory or upon installation.

Full story: So I lost my bird strike virginity a couple nights ago. Descending through 4800 MSL (~3500 AGL) at nearly 11pm, in total darkness in Middle-Of-Nowhere, South Dakota, I hear this earth-shattering BANG! that reverberated through the whole plane. My first instinctual reaction was the engine came apart and I was going to be trying to put it down with basically no ground reference in rolling hilly terrain. But thankfully, the engine kept purring along, controls were normal, and everything seemed totally fine. My destination was less than 20 nm away and was my closest airport, so I continued on and the conclusion of the flight was uneventful.

It was only after I shut down and got out that I noticed guts and feathers on the right windscreen. I felt better having an explanation for the explosion-like sound, and there did not seem to be any obvious damage. (To the plane, anyway...the bird paid dearly for staying up past its bedtime.) But in the light of day the next day, I discovered the compass mount had cracked clean in half, presumably a result of the "shockwave" through the center windscreen bracket. See picture. birdstrike_compass.jpg
 
Is your prop without any evidence of bird juice?
That is correct. No idea how the prop didn't get it, but there is absolutely zero evidence it hit the prop.
I can't see it clearly in the picture but it looks like mount itself is broken and not the compass in it.
Good point. I see what you are saying after looking at that picture again. I will recheck the compass/mount later today and see if that is the case. That would certainly simplify the repair.
 
That is correct. No idea how the prop didn't get it, but there is absolutely zero evidence it hit the prop.
An acquaintance hit a Great Egret in his T-28. He was flat out, at about 30 feet doing a pass in prep for an airshow. The bid hit just outboard of the cooling vent on the right wing, about the #3 rib. Probably 20" or so inside the prop disc. Never touched the prop. Prop was mirror polished, so anything that touched it would definitely show. Doing an inspection on that airplane two years later, we found egret feathers in the rotating beacon on the vertical fin, and you could still smell dead bird if you got down in the bottom of the cockpit.
 
A bud met a bird while under the hood in his Mooney.

Took out pilot side window and crunched stab leading edge back to spar

so it had to be re-skinned. High shear rivets at inboard end were sheared off.

It almost took the tail off!
 
Did the bird break the compass?

That almost looks like some gorilla glue, duct tape or zip ties could fix? o_O
 
That almost looks like some gorilla glue, duct tape or zip ties could fix? o_O
I tend to agree with you. $195 for a piece of plastic flimsier than a 2 L soda bottle is highway robbery. This one may be getting rebuilt with "owner-supplied parts" (a cutout from a water bottle of appropriate diameter + some glue +/- a couple zip ties).
 
I tend to agree with you. $195 for a piece of plastic flimsier than a 2 L soda bottle is highway robbery. This one may be getting rebuilt with "owner-supplied parts" (a cutout from a water bottle of appropriate diameter + some glue +/- a couple zip ties).
Ebay used one? I'd start there myself.
 
Back
Top