Would a 337 be required?

RyanB

RyanB

Super Administrator
Management Council Member
PoA Supporter
Joined
Jul 21, 2010
Messages
16,211
Location
Chattanooga, TN
Display Name
Display name:
Ryan
Scenario:

Student and CFI are on final and upon landing, the brakes are locked and the airplane veers off the right side of the runway and ends up going nose first causing a prop strike and the right wing gets damaged to the point where a new one is required (major repair?). In this case, would a 337 be needed and who would actually sign it?

The FAA 337 approval process just says ‘the applicant’ but doesn’t specify who the applicant actually is (ie., the aircraft owner or the A&P that’s installing the wing).
 
Just a WAG since I don't have the reg in front of me but I'd say neither. The IA that signs it off as airworthy after repair signs the 337.
 
You're hypothetical is a bit incomplete. What plane did the catastrophic wing damage occur on?

I'd guess the best hope would be a plane with removable wings, ala the RV12, or some strutless example like the C117 or C210.

In general though, if you need to replace a wing and tear down engine for the prop strike it is highly unlikely that thing will be anything other than a parts picker.
 
Last edited:
Timbeck2 said:
Just a WAG since I don't have the reg in front of me but I'd say neither. The IA that signs it off as airworthy after repair signs the 337.
Click to expand...
But wouldn’t the aircraft owner need to give authorization for such a repair to be made?
 
Ravioli said:
You're hypothetical is a bit incomplete. What plane did the catastrophic wing damage occur on?
Click to expand...
Not a hypothetical. This happened on a Super Decathlon.
 
Owner approves the work....whom ever is performing and returning to service is the one signing off the 337.
 
Ryanb said:
In this case, would a 337 be needed
Click to expand...
Not quite enough info, but a 337 for which part: the engine or wing? If you replace the engine and wing vs repair them then no 337 needed. If repairing and depending how the repair is classified, an A&P with Inspection Authorization (IA) is needed to sign the 337. As to applicant, it usually is the A&P performing the repair and/or the IA who approves it for return to service.
 
Bell206 said:
Not quite enough info, but a 337 for which part: the engine or wing? If you replace the engine and wing vs repair them then no 337 needed. If repairing and depending how the repair is classified, an A&P with Inspection Authorization (IA) is needed to sign the 337. As to applicant, it usually is the A&P performing the repair and/or the IA who approves it for return to service.
Click to expand...


Yay....looks like Timmy finally got something right!
 
Bell206 said:
Not quite enough info, but a 337 for which part: the engine or wing?
Click to expand...
The wing. I assumed it was the A&P but wasn’t quite sure if the aircraft owner had to do anything. The 337 seems like one of those big government waiting games...but what do I know! :)
 
To clarify, this accident occurred awhile back, but after reading and trying to understand how 337’s work, it brought this to mind, so I figured I’d reach out and see what others had to say.

Thanks all!
 
Ryanb said:
The wing. I assumed it was the A&P but wasn’t quite sure if the aircraft owner had to do anything. The 337 seems like one of those big government waiting games...but what do I know! :)
Click to expand...
An A&P can do the work and return it to service. If a 337 were required (depending on the repair - and it is up to the A&P to make the determination), s/he would also sign the 337 in section 6D but an I/A is required to sign section 7.
 
Form 337 is for Major Repair & Alteration. A R&R of a wing or engine is not a repair, nor is it an alteration. It is a remove and replace job. However, the structure should be properly inspected to make sure there is no other damage from the incident.
 
Brad Smith said:
Form 337 is for Major Repair & Alteration. A R&R of a wing or engine is not a repair, nor is it an alteration. It is a remove and replace job. However, the structure should be properly inspected to make sure there is no other damage from the incident.
Click to expand...
This is it folks, Entire wing replacement,, NO 337 is required.

Big IF

the replacement wing has no repairs meeting a major repair requirements.
 
I wouldn’t call it “permission” but I’m not gonna fix the guy’s airplane unless he asks me to.
 
You must log in or register to reply here.
Back
Top