Triumph (TGI) 8-K Mergers & Acquisitions and Treasurer

Exhibit 3.1

AMENDMENT NO. 1 TO

AMENDED AND RESTATED BY-LAWS

OF

TRIUMPH GROUP, INC.

This Amendment No. 1 to Amended and Restated By-Laws of Triumph Group, Inc., a Delaware corporation (the “By-laws”), is made as of this 2^nd day of February, 2025. Capitalized terms used but not defined herein shall have the meaning given to such terms in the By-laws.

1. The By-laws are hereby amended to add a new Article X immediately following Article IX, which shall read as follows:

“ARTICLE X

FORUM FOR ADJUDICATION OF CERTAIN DISPUTES

Section 1.(a) Unless the Corporation consents in writing to the selection of an alternative forum (an “Alternative Forum Consent”), the Court of Chancery of the State of Delaware (the “Chancery Court”) shall, to the fullest extent permitted by law, be the sole and exclusive forum for (i) any derivative action, suit or proceeding brought on behalf of the Corporation, (ii) any action, suit or proceeding asserting a claim of breach of a duty (including any fiduciary duty) owed by any current or former director, officer, stockholder, employee or agent of the Corporation to the Corporation or the Corporation’s stockholders, (iii) any action, suit or proceeding asserting a claim against the Corporation or any current or former director, officer, stockholder, employee or agent of the Corporation arising out of or relating to any provision of the DGCL, the Certificate of Incorporation or these By-laws (each, as in effect from time to time) or (iv) any action, suit or proceeding asserting a claim against the Corporation or any current or former director, officer, stockholder, employee or agent of the Corporation governed by the internal affairs doctrine of the State of Delaware; provided, however, that, in the event that the Chancery Court lacks subject matter jurisdiction over any such action or proceeding, the sole and exclusive forum for such action or proceeding shall be another state or federal court located within the State of Delaware, in each such case, unless the Chancery Court (or such other state or federal court located within the State of Delaware, as applicable) has dismissed a prior action by the same plaintiff asserting the same claims because such court lacked personal jurisdiction over an indispensable party named as a defendant therein. Unless the Corporation gives an Alternative Forum Consent, the federal district courts of the United States of America shall, to the fullest extent permitted by law, be the sole and exclusive forum for the resolution of any complaint asserting a cause of action arising under the Securities Act of 1933, as amended. Failure to enforce the foregoing provisions would cause the Corporation irreparable harm and the Corporation shall be entitled to equitable relief, including injunctive relief and specific performance, to enforce the foregoing provisions. If any action the subject matter of which is within the scope of the first sentence of this Article X

is filed in a court other than the courts in the State of Delaware (a “Foreign Action”) in the name of any stockholder, such stockholder shall be deemed to have consented to (x) the personal jurisdiction of the state and federal courts in the State of Delaware in connection with any action brought in any such court to enforce the provisions of the first sentence of this Article X and (y) having service of process made upon such stockholder in any such action by service upon such stockholder’s counsel in the Foreign Action as agent for such stockholder.

(b) Any person or entity purchasing, otherwise acquiring or holding any interest in shares of capital stock of the Corporation shall be deemed to have notice of and consented to the provisions of this Article X. The existence of any prior Alternative Forum Consent shall not act as a waiver of the Corporation’s ongoing consent right as set forth above in this Article X with respect to any current or future actions or claims. This provision is intended to benefit and may be enforced by the Corporation, its directors, officers, stockholders, employees, agents, the underwriters to any offering giving rise to such complaint, and any other professional or entity whose profession gives authority to a statement made by that person or entity and who has prepared or certified any part of the documents underlying the offering.”

2. Except as specifically amended herein, the By-laws of the Corporation shall remain unchanged and in full force and effect.

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