system: You are a contract-analysis assistant performing a span-extraction task. You are given an excerpt from a commercial contract and the name of a clause type to locate within it.

Return the exact text of the requested clause, copied verbatim from the excerpt — identical wording and punctuation, with no paraphrasing, summarising, explanation, or added commentary.

The excerpt is one window of a much longer contract and often will not contain the requested clause. If the requested clause does not appear in this excerpt, respond with exactly: Not found.

Output only the extracted clause text, or the exact string `Not found.` — nothing else.

user: Contract excerpt:
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etc.); and (iii) initiate and pursue an efficient staggering program to ensure a smooth schedule removal plan for shop maintenance. 5.3 Left intentionally blank 5.4 On-Aircraft tasks All scheduled and unscheduled on-Aircraft maintenance activities, tasks and works and line maintenance, including the following, are under and at the Company's responsibility, risks, costs and expenses: (i) line maintenance tasks associated with engines, propellers, landing gears, wheels, brakes and tires, (ii) Main Elements removals and installations for BUR and Scheduled Events, (iii) Main Elements accessories removals and installations, (iv) Main Elements conditioning for storage, (v) grease and lubricant refilling, seals, gaskets, hardware and consumable parts replacement, (vi) propellers balancing, blades removals and installations, (vii) ensure that log books are reflecting the updated maintenance status of each Main Element. (viii) engine fuel nozzles removals and installations, (ix) engine control trend monitoring performance and analysis, [*****] Confidential material redacted and filed separately with the Securities and Exchange Commission. AZUL-ATR Global Maintenance Master Agreement DS/CS-3957/14/Issue 7 Page 90/110 Source: AZUL SA, F-1/A, 3/3/2017 Source: AZUL SA, F-1/A, 3/3/2017 Execution version CONFIDENTIAL TREATMENT REQUESTED (x) regular cleaning of the engines, (xi) inspection of internal parts (boroscopic inspection). 6. Specific services not covered by Main Elements' Service The following services and their related costs (labor and parts) are not covered by the prices set out in Clause 1.3.2 of the Exhibit 14 ("Price conditions") and shall be managed on Time and Material conditions: (i) all costs of technical modifications that may be incurred due to the embodiment on Main Elements of Airworthiness Directives, servicebulletins, optional or recommended modifications, (ii) replacement or repair of Main Elements' sub-Items costs relating to any failure of the Company to comply with its obligations under thisAgreement, (iii) the replacement cost of a Main Element and/or its sub-assemblies that is declared BER or TNR, (iv) any additional costs in connection with the repair or overhaul of any Main Element serial number due to Company's failure to producedata as required hereunder, (v) Items and/or any sub-Items received in damaged conditions due to Abnormal Use, mishandling, incorrect storage, lightning strike, FOD, corrosion, abrasion or erosion, dropped or water immersion, over-torque condition or over-speed in excess of transient or over- temperature (vi) Services performed on Main Element(s) fitted on Aircraft to comply with Aircraft redelivery conditions or delivery conditions to a third party, . For sake of clarity, Aircraft redelivery conditions or delivery conditions of a third party will have to be declared by the Company to the Repairer in anticipation [*****] before the stop of the Aircraft, (vii) the replacement of missing parts and parts unapproved by the OEM, (viii) the repair of damages or replacements resulting from previous repair and/or overhaul not performed pursuant to this Agreement, (ix) for the landing gears, the replacement of life limited parts, repair and/or replacement of On Condition Parts listed in Exhibit 4, replacement of any part (including expendables) which vendor price exceeds [*****] with the exception of parts listed in Exhibit 11 Clause 2.1 (ii), (x) for the propellers, replacement of dome, repair of armbore, replacement of de-icer and replacement of nickel sheath. 7. Discarding the Main Elements The Parties acknowledge that under normal operating conditions any Main Element may be declared BER or TNR. The Repairer shall notify the Company in case of BER or TNR status of any Main Element, and shall request the Companys approval to discard such Main Element. If the Company denies such approval, the Main Element shall be delivered back to the Company at its costs and risks. The Parties agree that the absence of a response by the Company to such Repairer's request within [*****] from the sending of the Repairer's notification of BER or TNR constitutes an approval for the Repairer to discard the relevant Main Element. [*****] Confidential material redacted and filed separately with the Securities and Exchange Commission. AZUL-ATR Global Maintenance Master Agreement DS/CS-3957/14/Issue 7 Page 91/110 Source: AZUL SA, F-1/A, 3/3/2017 Execution version In the event the Repairer shall discard any unserviceable Main Element, the Company shall pay the applicable price for test and/or scrap, as the case may be. In case of the discarded Main Element is an unserviceable propeller blade that has been replaced with a serviceable propeller blade of the Pool or of the Stock pursuant to the provisions of Exhibits 8 ("Lease of the Stock") or 9 ("Spare parts standard exchange Service"), the Repairer shall invoice and the Company shall pay for the price of such serviceable propeller blade of the Pool
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Extract the exact clause related to "Volume Restriction" from the excerpt above.

assistant: Not found.