Document:

EXHIBIT 10.71
                                 AMENDMENT NO. 2
                    TO AMENDED & RESTATED SECURITY AGREEMENT

This AMENDMENT NO. 2 TO AMENDED & RESTATED SECURITY AGREEMENT (this
"AMENDMENT"), is made effective as of August 24, 2007 (the "EFFECTIVE DATE"), by
and between U.S. HELICOPTER CORPORATION, a Delaware corporation with its
principal place of business located at 6 East River Piers, Suite 216, Downtown
Manhattan Heliport, New York, New York 10004 (the "COMPANY") and YA GLOBAL
INVESTMENTS, L.P. (the "SECURED PARTY") with reference to the following
recitals:

A. Secured Party and the Company entered into that certain Amended & Restated
Security Agreement, dated March 30, 2007, as amended by that certain Amendment
No. 1 to Amended & Restated Security Agreement as of May 14, 2007 (as amended,
the "MASTER AGREEMENT").

B. Contemporaneously with the execution of this Amendment, the Secured Party and
the Company are entering into a Securities Purchase Agreement (the "SPA")
pursuant to which the Company shall issue and sell to the Secured Party
additional secured convertible debentures (the "ADDITIONAL CONVERTIBLE
DEBENTURES") which shall be convertible into shares (the "ADDITIONAL CONVERSION
SHARES") of the Company's Common Stock.

C. To induce the Investor to execute and deliver the SPA and purchase the
Additional Convertible Debentures, the Company has agreed to amend the Master
Agreement to provide certain amendments to the Master Agreement to specifically
include the Additional Convertible Debentures as part of the "Obligations" as
defined in the Master Agreement.

FOR GOOD AND VALUABLE CONSIDERATION, the receipt and sufficiency of which is
hereby acknowledged, Investor and the Company agree as follows:

1. CONVERTIBLE DEBENTURES. The Definition of the term "Convertible Debentures"
as used in the Master Agreement shall hereinafter include the Additional
Convertible Debentures.

2. TRANSACTION DOCUMENTS. The Definition of the term "Transaction Documents" as
used in the Master Agreement shall hereinafter include the Additional
Convertible Debentures, the SPA, and the Irrevocable Transfer Agent Instructions
entered into on the date hereof.

3. OBLIGATIONS SECURED. The definition of the term "Obligations" as used in the
Master Agreement shall include all the obligations of the Company to the Secured
Party under the Additional Convertible Debentures.

4. FILINGS. The Company shall make, execute, acknowledge and deliver to the
Secured Party such documents and instruments, including, without limitation,
financing statements, certificates, affidavits and forms as may, in the Secured
Party's reasonable judgment, be necessary to effectuate, complete or perfect, or
to continue and preserve, or amend, the security interest of the Secured Party
in the Pledged Property.

5. DEFINITIONS. Capitalized terms not otherwise defined herein shall have the
meaning ascribed to them under the Master Agreement.

6. NON-IMPAIRMENT. Except as expressly modified herein, the Master Agreement
shall continue in full force and effect, and the parties hereby reinstate and
reaffirm the Master Agreement as modified herein.

7. INCONSISTENCIES. In the event of any inconsistency, ambiguity or conflict
between the terms and provisions of this Amendment and the terms and provisions
of the Master Agreement, the terms and provisions of this Amendment shall
control.

8. COUNTERPARTS. This Amendment may be executed in any number of counterparts,
each of which when executed will be deemed an original and all of which, taken
together, well be deemed to be one and the same instrument.

                   REMAINDER OF PAGE INTENTIONALLY LEFT BLANK
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         IN WITNESS WHEREOF, the parties hereto have executed this Amendment as
of the date first above written.

                                          COMPANY:
                                          U.S. HELICOPTER CORPORATION

                                          By:  /S/ JOHN G. MURPHY
                                          John G. Murphy
                                          Chief Executive Officer and President

                                          SECURED PARTY:
                                          YA GLOBAL INVESTMENTS, L.P.

                                          By:      Yorkville Advisors, LLC
                                          Its:    Investment Manager

                                          By:     /S/ TROY RILLO
                                          Name:  Troy Rillo
                                          Title:  Senior Managing DirectorEXHIBIT 10.72

                              U.S. HELICOPTER CORP.

                                  AMENDMENT TO
                          SECURED CONVERTIBLE DEBENTURE
                    NOS. CCP-1, USHP-3-1, USHP-4-1, USHP-5-1

             THIS DEBENTURE AMENDMENT SHOULD BE ATTACHED TO EACH OF
                             THE ORIGINAL DEBENTURES

         This Amendment to Debenture (this "Amendment") is issued in connection
with those certain Secured Convertible Debentures Nos. CCP-1, USHP-3-1,
USHP-4-1, USHP-5-1 (each a "Debenture" and collectively, the "Debentures")
issued by U.S. Helicopter Corp., (the "Company") to YA GLOBAL INVESTMENTS, L.P.
(F/K/A CORNELL CAPITAL PARTNERS, L.P.) (the "Holder"). All capitalized terms not
defined herein shall have the meaning ascribed to them in the Debentures.

         THIS CERTIFIES THAT, the following amendments are hereby made to the
Debenture:

         1.    The Fixed Conversion Price of each of the Debentures shall
               hereinafter be equal to $0.50, as may be adjusted from time to
               time pursuant to the terms of each Debenture.

         2.    The interest rate of Debenture Nos. USHP-4-1 and USHP-5-1 shall
               be increased to 18% as of the date hereof.

         3.    The Maturity Date of Debenture Nos. USHP-4-1 and USHP-5-1 shall
               be extended to October 24, 2007.

         4.    The following section shall be added to each Debenture:

               HOLDER'S RIGHTS UPON LIQUIDATION.

               A. Upon any Liquidation (as defined below) the Holder shall be
               entitled to receive an amount equal to the greater of (i) the
               amount required to be paid under this Debenture (including all
               principal, interest, and any redemption amounts) or (ii) the
               Assumed Conversion Amount. Thereafter, no further distributions
               shall be made to the Holder of this Debenture.

               B. "LIQUIDATION" means (A) a liquidation, dissolution or winding
               up of the Company, whether voluntary or involuntary, (B) a
               consolidation or merger of the Company with or into any other
               person(s), entity or entities in which less than a majority of
               the outstanding voting power of the surviving person(s), entity
               or entities is held by persons or entities who were stockholders
               of the Company prior to such event, (C) a sale or other

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               disposition (whether in a single transaction or a series of
               related transactions) of substantially all of the assets of the
               Company, or (D) a transaction pursuant to which the Company
               becomes a private company not required to file periodic reports
               with the Commission.

               C. "ASSUMED CONVERSION AMOUNT" means the total amount of proceeds
               that would be payable to the Holder on a Liquidation if
               immediately prior to such Liquidation the entire principal
               outstanding and accrued interest under this Debenture was
               converted into a number of shares of Common Stock at the then
               current Conversion Price (assuming for these purposes that the
               number of authorized shares of Common Stock has been is
               sufficient for the full conversion of the Debenture and without
               taking into effect any limitations on conversions set forth in
               the Debenture).

         5.    From and after the date hereof, notwithstanding any prior
               agreements between the Obligor and the Holder (whether written,
               oral, or otherwise), and except as set forth in the next
               sentence, any and all prior conversion limitations or lockup
               agreement of the Holder or restrictions of the Holder regarding
               the sale of the common stock of the Obligor shall be null and
               void. Furthermore, any and all conversion limitations set forth
               each of the Debentures, including, without limitation, in Section
               3(b) of each of the Debentures shall be removed and replaced with
               the following conversion limitation:

               LIMITATION OF CONVERSION BY THE HOLDER. A Holder may not convert
               this Debenture or receive shares of Common Stock as payment of
               interest hereunder to the extent such conversion or receipt of
               such interest payment would (x) result in the Holder, together
               with any affiliate thereof, beneficially owning (as determined in
               accordance with Section 13(d) of the Exchange Act and the rules
               promulgated thereunder) in excess of 4.99% of the then issued and
               outstanding shares of Common Stock, including shares issuable
               upon conversion of, and payment of interest on, this Debenture
               held by such Holder after application of this Section, or (y)
               result in a violation of the U.S. Department of Transportation
               foreign ownership regulations. Since the Holder will not be
               obligated to report to the Obligor the number of shares of Common
               Stock it may hold at the time of a conversion hereunder, unless
               the conversion at issue would result in the issuance of shares of
               Common Stock in excess of 4.99% of the then outstanding shares of
               Common Stock without regard to any other shares which may be
               beneficially owned by the Holder or an affiliate thereof, the
               Holder shall have the authority and obligation to determine
               whether the restriction contained in this Section will limit any
               particular conversion hereunder and to the extent that the Holder
               determines that the limitation contained in this Section applies,
               the determination of which portion of the principal amount of
               this Debenture is convertible shall be the responsibility and
               obligation of the Holder. If the Holder has delivered a
               Conversion Notice for a principal amount of this Debenture that,
               without regard to any other shares that the Holder or its
               affiliates may beneficially own, would result in the issuance in
               excess of the permitted amount hereunder, the Obligor shall

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               notify the Holder of this fact and shall honor the conversion for
               the maximum principal amount permitted to be converted on such
               Conversion Date and retain any principal amount tendered for
               conversion in excess of the permitted amount hereunder for future
               conversions. The provisions of SECTION may be waived by a Holder
               (but only as to itself and not to any other Holder) upon not less
               than 65 days prior notice to the Obligor. Other Holders shall be
               unaffected by any such waiver. Notwithstanding anything in any
               agreement to the contrary, the Buyer shall have no restriction on
               the conversion of any convertible debt or warrants held by it or
               the sale of any stock, including, without the limitation, any
               stock underlying any convertible debt or warrant; PROVIDED that
               such acts do not violate the U.S. Department of Transportation
               foreign ownership regulations.

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         IN WITNESS WHEREOF, the Company has caused this Amendment to be signed
by its duly authorized officer.

                                  U.S. HELICOPTER CORP.

                                  By:        /S/ JOHN G. MURPHY
                                           -----------------------------------
                                  Name:  John G. Murphy
                                  Title:   Chief Executive Officer and President

Dated:  August 24, 2007

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