2
$\begingroup$

If an already existing fleet (737-800 and 900 without winglets) is thinking of a winglet modification, is that possible without regulations? Or what are the regulations?

$\endgroup$
  • 5
    $\begingroup$ Aircraft modifications in general are subject to airworthiness update. CAA (UK) // FAA (US). $\endgroup$ – mins Oct 28 '15 at 9:24
  • $\begingroup$ Are you referring to the regulatory approval process that declares the plane (type) is airworthy with the addition of the winglet, or the physical installation on an existing plane of a previously approved winglet? $\endgroup$ – FreeMan Oct 28 '15 at 12:53
1
$\begingroup$

In the U.S., changing anything on the wing is considered to be a "Major Repair/Alteration" according to the FAA (FAR Part 43 - Appendix A)

To make those changes, this form - http://www.faa.gov/documentLibrary/media/Form/Form_337.pdf needs to be completed.

As you can see, it requires a certified mechanic to handle the work after which a person with Inspection Authorization would approve the aircraft for return to service.

A little extra reading - Who can perform different maintenance checks?.

$\endgroup$
  • 1
    $\begingroup$ It's more than checking the change has been done properly. You need to renew the type certificate if a winglet is added, which includes structural tests and flight testing before a mechanic can attach the winglet to the next plane of the same type. Legally, that is. $\endgroup$ – Peter Kämpf Oct 28 '15 at 16:48

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.