Document

Contrail Aviation Support, LLC

Loan No. 20006227863

PROMISSORY NOTE

TERM NOTE H

$14,875,000.00 February 18, 2022

FOR VALUE RECEIVED, the undersigned CONTRAIL AVIATION SUPPORT, LLC "Borrower"), promises to pay to the order of OLD NATIONAL BANK (the "Lender") the principal sum of Fourteen Million Eight Hundred Seventy-Five Thousand Dollars

($14,875,000.00), or such lesser amount as Lender may in fact advance to or for the benefit of Borrower in accordance with the terms of this Note and the Master Loan Agreement (as is shown to be outstanding according to the records of Lender), together with interest thereon as hereinafter provided.

1. RATE OF INTEREST

The principal amount of the Loan outstanding from time to time shall bear interest at the

variable Wall Street Journal Prime Rate plus 0.75% per annum. "Wall Street Journal Prime Rate" shall mean that variable interest rate which is subject to change from time to time based upon changes in the independent index which is the Prime Rate as published in the

Wall Street Journal (the "Index"). The Index is not necessarily the lowest rate charged by Lender on its loans. If the Index becomes unavailable during the term of this loan, Lender may designate a substitute index after notifying Borrower. Lender will tell Borrower the

current Index rate upon Borrower's request. The interest rate change will not occur more

often than each day. Adjustment shall become effective the next business day after publication or announcement of the Index change. Borrower understands that Lender may make loans based upon other rates and indexes as well.

2.PAYMENTS

Payments of both principal and interest are to be made in immediately available funds in lawful currency of the United States of America at the office of Lender, or such other place as the holder hereof shall designate to the undersigned in writing. Unless required by applicable law, and prior to any default being declared, payments will be applied first to any accrued unpaid interest; then to principal; then to escrow; then to any late charges; and then to any unpaid collection costs. Funds shall be deemed received by Lender on the next

business day if not received by 12:00 p.m. local time at the location payments hereunder

are to be made.

Borrower shall make payments of:

(a)eighteen (18) consecutive monthly payments of accrued unpaid interest, commencing on March 18, 2022, and continuing on the 18th day of each successive

month thereafter;

(b)Principal Reduction Payments as set forth in Section 5 below, commencing on March 31, 2022, and continuing on the last day of each successive month thereafter; and

(c)A final payment of all outstanding principal and accrued and unpaid interest

together with such other amounts as shall then be due and owing from Borrower to

Lender under the Term Loan H on the Term Loan H Maturity Date (as defined

below).

3.FINAL PAYMENT MATURITY DATE

Notwithstanding anything set forth above, all sums due under this Note, both principal and interest, if not sooner paid, shall be due and payable on the first to occur of: (i) August 18, 2023; or (ii) the date on which Term Loan H is accelerated as provided in this Note or the Master Loan Agreement ("Term Loan H Maturity Date").

4.PREPAYMENT; MINIMUM FINANCE CHARGE

Borrower agrees that all loan fees and other prepaid finance charges are earned fully as of the date of the loan and will not be subject to refund upon early payment (whether voluntary or as a result of default), except as otherwise required by law. In any event, even upon full prepayment of this Note, Borrower understands that Lender is entitled to a minimum finance charge of $95.00. Other than Borrower's obligations to pay any minimum finance charge, Borrower may pay without penalty all or a portion of the amount owed earlier than it is due. Early payments will not, unless agreed to by Lender in writing, relieve Borrower of Borrower's obligation to continue to make payments under the payment schedule.

Rather, early payments will reduce the principal balance due and may result in Borrower making fewer payments. Borrower agrees not to send Lender payments marked "paid in full," "without recourse," or similar language. If Borrower sends such a payment, Lender may accept it without losing any of Lender's rights under this Note, and Borrower will remain obligated to pay any further amounted owed to Lender. All written communications concerning disputed amounts, including any check or other payment

instrument that indicates that the payment constitutes "payment in full" of the

amount owed or that is tendered with other conditions or limitations or as full

satisfaction of a disputed amount must be mailed or delivered to: Old National Bank, PO Box 3728, Evansville, IN 47736-3728.

5.MANDATORY PREPAYMENTS

In addition to the payments set forth in Section 2 above, Borrower shall make a monthly principal payment equal to one hundred percent (100%) of the amount of the gross sales proceeds collected that are derived from any of the Engines or any of its components (each a "Principal Reduction Payment") during the prior month as of the last day of such month.

6.PAYMENT DUE DATE/FAILURE TO PAY

(a)All payments due under this Note shall be made without demand and received on the dates provided in Section 2 above;

(b)In the event of a default as defined in this Note, or as set forth in the Master Loan Agreement or any Collateral Documents or Guaranty Agreements, at the option of Lender, for so long as the default exists, interest on the outstanding principal balance hereof shall accrue and will be paid at the rate in effect from time to time hereunder plus an additional 3% per annum, but in no event shall such default rate exceed, however, the maximum rate permitted by law ("Default Interest Rate");

and

(c)Any installment of principal and/or interest due hereunder which is not received on or before the 10th day following the date on which it is due shall be subject to

a late payment fee of 5% of the amount owed on such installment (but not less than $50.00) for the purpose of defraying the expense incident to handling such delinquent payment (this payment is in addition to the amount set forth in (b)

above).

7.INTEREST RATE COMPUTATION

Interest on this Note is computed on a 365/360 basis; that is, by applying the ratio of the interest rate over a year of 360 days, multiplied by the outstanding principal balance, multiplied by the actual number of days the principal balance is outstanding. All interest payable under this Note is computed using this method.

8.PLACE OF PAYMENT

All payments shall be made to Lender at the address on the interest billing statement provided by Lender or at the address of Lender set forth in Section 14 of this Note, at any branch of Lender, or such other place as Lender may from time to time designate in writing.

9.MASTER LOAN AGREEMENT AND SECURITY

This Note evidences indebtedness incurred under; is the "Term Note H" referred to in; and is subject to the terms and provisions of the Master Loan Agreement by and among CAS, Contrail Aviation Leasing, LLC, and Lender dated June 24, 2019 (as amended, restated, supplemented or otherwise modified from time to time, including, but not limited to, by

Supplements thereto, the "Master Loan Agreement"). Capitalized terms not otherwise defined herein shall have the meaning ascribed to them in the Master Loan Agreement.

This Note is secured by the Collateral Documents. The terms of the Collateral Documents

are incorporated herein and made a part hereof by reference.

10.DEFAULT

In the event of the occurrence of an Event of Default under the Master Loan Agreement,

and after giving effect to any applicable right to cure provided by the Master Loan Agreement, Lender may, at its option and without notice, declare this Note to be, and this Note shall thereupon become, immediately due and payable, together with accrued interest thereon. Without limiting the foregoing right and without limiting any other rights and remedies of the Lender at law or in equity, the Lender is also entitled to the rights and

remedies provided for in the Master Loan Agreement and the Collateral Documents and may enforce the covenants, agreements and undertakings of Borrower contained therein and may exercise the remedies provided for thereby or otherwise available in respect thereto, all in accordance with the terms thereof. In addition to any other right, Lender may apply and/or set-off against amounts due it hereunder any deposits, account balances, or other credits of any Borrower in the possession of or in transit to Lender, and Borrower hereby grants Lender a security interest in all of the foregoing.

11.WAIVERS

Except as herein provided, Borrower and all others who may become liable for all or part of the principal balance hereof or for any obligations of Borrower to Lender or the holder hereof (a) forever waive presentment, protest and demand, notice of protest, demand and dishonor and non-payment of this Note, and all other notices in connection with the

delivery, acceptance, performance, default or enforcement of the payment of this Note, (b) agree that the time of payment of the debt or any part thereof may be extended from time

to time without modifying or releasing the lien of the Collateral Documents or the liability of Borrower or any other such parties, the right of recourse against Borrower and such parties being hereby reserved by Lender; and (c) agree that time is of the essence. Borrower agrees to pay all reasonable costs of collection when incurred, whether suit be brought or not, including reasonable attorneys' fees and costs of suit and preparation therefore, and to perform and comply with each of the covenants, conditions, provisions and agreements of Borrower contained in this Note, the Master Loan Agreement and Collateral Documents. It is expressly agreed by Borrower that no extensions of time for the payment of this Note, nor the failure on the part of Lender to exercise any of its rights hereunder, shall operate to release, discharge, modify, change or affect the original liability under this Note, the Master Loan Agreement or any of the Collateral Documents, either in whole or in part.

12.WAIVER OF JURY TRIAL

BORROWER WAIVES ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY ACTION OR PROCEEDING RELATING TO THIS INSTRUMENT AND TO ANY

OF THE LOAN DOCUMENTS, THE OBLIGATIONS HEREUNDER OR THEREUNDER, ANY COLLATERAL SECURING THE OBLIGATIONS, OR ANY TRANSACTION ARISING THEREFROM OR CONNECTED THERETO. BORROWER REPRESENTS THAT THIS WAIVER IS KNOWINGLY, WILLINGLY AND VOLUNTARILY GIVEN.

13.COMPLIANCE

This Note is to be governed by, and construed and enforced in accordance with, the laws of the State of Wisconsin (without giving effect to Wisconsin's principles of conflicts of

law), except to the extent (a) of procedural and substantive matters relating only to the creation, perfection, foreclosure and enforcement of rights and remedies against specific collateral, which matters shall be governed by the laws of the state in which the collateral is located (the "Collateral State"), and (b) that the laws of the United States of America and any rules regulations, or orders issued or promulgated thereunder, applicable to the affairs and transactions entered into by the Lender, otherwise preempt Collateral State law or Wisconsin law; in which event such federal law shall control. Borrower hereby irrevocably

submits to the jurisdiction of any Wisconsin or federal court sitting in Milwaukee, Wisconsin (or, with respect to the matters set forth in subsection (a) above, any state in which the property encumbered by the Collateral Documents is located) over any suit, action or proceeding arising out of or relating to this Note or any of the Loan Documents. Borrower hereby waives any right to object to the location of venue in any Wisconsin or federal court sitting in Milwaukee, Wisconsin, or, with respect to the matters set forth in subsection (a) above, to the appropriate court located in the Collateral State, concerning any suit, action or proceeding arising out of or relating to this Note or any of the Loan Documents and waives any objection which it may have at any time to the laying of venue in any proceedings brought in any such court, waives any claim that such proceedings have been brought in an inconvenient forum and further waives the right to object, with respect to such proceedings, that such court does not have jurisdiction over such party to object to

the choice of governing law set forth in this section. Borrower acknowledges that the loan evidenced by this Note was solicited, negotiated, closed and funded in the State of Wisconsin, and waives any implication that the laws of any other state shall apply for usury purposes.

14.NOTICES

All notices, requests and demands to be made hereunder to the parties hereto must be in writing and must be delivered to the applicable address stated below by any of the

following means: (a) personal service; (b) electronic communication, including, but not

limited to electronic mail, telex, telegram or telecopying (and, if by telex, telegram or telecopying, then only if confirmed in writing sent by registered or certified, first class

mail, return receipt requested); or (c) registered or certified, first class mail, return receipt

requested. Such addresses may be changed by notice to the other parties given in the same

manner as provided above. Any notice, demand or request sent pursuant to either subsection (a) or (b) hereof will be deemed received upon such personal service or upon

dispatch by electronic means, and, if sent pursuant to subsection (c) will be deemed received three (3) days following deposit in the mail.


Borrower:			CONTRAIL AVIATION SUPPORT, LLC 435 Investment Court Verona, WI 53593-8788
Lender:			OLD NATIONAL BANK 25 W. Main St. Madison, WI 53703

15.INTEREST NOT TO EXCEED MAXIMUM ALLOWED BY LAW.

If from any circumstances whatsoever, by reason of acceleration or otherwise, the fulfillment of any provision of this Note involves transcending the limit of validity

prescribed by any applicable usury statute or any other applicable law, with regard to obligations of like character and amount, then the obligations to be fulfilled will be reduced to the limit of such validity as provided in such statute or law, so that in no event shall any exaction be possible under this Note in excess of the limit of such validity.

16.SUCCESSORS

All rights, powers, privileges and immunities herein granted to Lender shall extend to its successors and assigns and any other legal holder of this Note, with full right by Lender to assign and/or sell same.

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BORROWER:			LENDER:
CONTRAIL AVIATION SUPPORT, LLC			OLD NATIONAL BANK
By:			By:
Joseph Kuhn			Tommy Olson
Its: CEO			Its: SVP

IN WITNESS WHEREOF, the Parties have executed this Note as of the date and year first above written.