IATA Aircraft Lease Guidance

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Guidance Material and Best Practices for Aircraft LeasesAnnex VI: Modifications GuidelinesAircraft Model :All modelsApplicability : EASA and FAA environment1. IntroductionDuring the lifetime of an aircraft, various modifications are implemented with the intention to change orupgrade specific functions or systems of the aircraft. During a transfer of aircraft the Lessor often requires aconsolidated file showing compliance with the applicable regulations and the lease agreement of allmodifications performed. However, this does exclude modifications performed at component level. This annexprovides guidelines for the airline on how to create a modification compliance file. The term modification fileis commonly used to describe two separate files:●●The EOs and SBs fileSTCs2. Regulatory Basis2.1 EASA ProceduresEASA regulations applicable to modifications can be found Part M (M.A 304, 305, 708, 710) and Part 21. Inaddition, EASA has published GM and AMC, which provide additional insights into the regulatoryrequirements of the modification process.EASA distinguishes between major and minor for any changes made to the type design of the aircraft. Thedetermination for major or minor modifications needs to be performed by an organization holding the EASAdesign organization approval (DOA), or directly by EASA.There are different levels of EASA DOA authorizations. For example, a basic DOA allows the holder to classifymajor or minor modification, and approve minor modifications only. A TC/STC holder with an EASA DOA canapprove both major and minor modifications.The process to determine if a change is major or minor is illustrated in Figure 10. The first criteria for theselection of a major or minor modification is the appreciable effect on weight, balance, structural strength,reliability, and operational characteristics of the aircraft. If the proposed modification has an impact on one ofthese factors, the modification should be classified as major. If this is not the case a second step ofconsiderations needs to be taken in order to determine the classification of the modification. During this step,the impact of the modification on the certification basis, Type Certificate, previous performed compliancedemonstration, and the need for reassessment of this compliance data is reviewed. Also, if the modification ispart of an AD, or introduces or affects a function where failure is catastrophic or hazardous, it will beclassified as major. The major classification for modifications linked to an AD may be re-classified as minor96 4 th Edition 2017
Annex VI: Modifications Guidelinesdue to the involvement of EASA in the airworthiness process, meaning not all modifications linked to an ADare necessarily major modifications. In all other cases, the classification is minor. In case of doubt, EASAshould be contacted for clarification.Figure 10.EASA Classification process2.2 FAA ProceduresOperators under FAA jurisdiction are responsible for ensuring that modifications are accomplished accordingto all applicable regulations under U.S. Code of Federal Regulations 14 CFR Part 43.4 th Edition 2017 97
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Guidance Material and BestPractices
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Table of ContentsList of Figures ..
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Table of Contents4.4 Engine Power b
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Table of ContentsAnnex X: LLP Back-
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List of FiguresFigure 1. Document S
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List of TablesTable 1. Different Ty
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AbbreviationsACACMIADAIRAMCAMMAMOCA
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AbbreviationsIPCLDNDLLPLOCLOILOPALR
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ScopeIATA’s ‘Guidance Material
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IntroductionIATA recommends a proce
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Section 1—Background1Background2P
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Backgrounddetermined period. As a r
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Backgroundthe repair is within SRM
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Pre-Deliveryin certain circumstance
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Pre-Deliverylimit, however it will
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Pre-DeliveryThe net lease is often
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Pre-Delivery●●Fixed costFlexibl
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Pre-Deliveryreserves rates depends
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Pre-DeliveryAs of July 2015, sixty-
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Deliveryredelivery conditions of th
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DeliveryOther items, such as wheels
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Deliverymodification and without an
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Deliveryand registration process in
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Deliveryimportant, as the continuou
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Delivery3.2.6 InspectionDuring the
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DeliveryooooGear TSN / CSN at Overh
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Deliveryminimum standards set by IC
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Deliveryimporting states recognize
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DeliveryIn Europe, under EASA rules
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Deliveryspecial procedures, phraseo
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Deliveryprogram, which effectively
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Section 4—Operations1Background2P
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Page 67 and 68: OperationsIt is advisable to the Le
Page 69 and 70: Operations4.2.7 Other Important EoD
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Page 77 and 78: RedeliveryA specific example of one
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Page 81 and 82: RedeliveryoLessor or Lessor represe
Page 83 and 84: Redeliveryincludes a “redelivery
Page 85 and 86: Redeliverythe redelivery of the Air
Page 87 and 88: Redeliveryrecovery plan. Lessee Pro
Page 89 and 90: Redeliveryrepresentatives fails to
Page 91 and 92: Redelivery4. Remediesa) If Lessee f
Page 93 and 94: References in AnnexesAnnex V Struct
Page 95 and 96: Annex I: Example Physical Inspectio
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Page 99 and 100: Annex II: Typical Redelivery Record
Page 105 and 106: Annex III: Typical Index of Deliver
Page 107 and 108: Annex IV: Engine Documentation Chec
Page 109 and 110: Annex V: Structural Repair File Gui
Page 115: Annex V: Structural Repair File Gui
Page 119 and 120: Annex VI: Modifications Guidelineso
Page 121 and 122: Annex VII: Aircraft Maintenance Pro
Page 127 and 128: Annex VIII: Airworthiness Directive
Page 135 and 136: Annex IX: Components GuidelinesAirc
Page 137 and 138: Annex IX: Components GuidelinesFAA
Page 139 and 140: Annex IX: Components GuidelinesOper
Page 141 and 142: Annex X: LLP Back-to-Birth Guidelin
Page 153 and 154: AcknowledgementsIATA:Chris MarkouGe
Page 155: www.iata.org/publishingcustserv@iat
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IATA Aircraft Lease Guidance

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