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31 July 2011 C1 CIVIL AVIATION DEPARTMENT HONG KONG ...

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2 Definitions2.1 For the purpose of this Notice the following definitions apply:(a)Aircraft Configuration List (ACL)A list of Line Replaceable Units (LRU) and modules with LoadableSoftware Aircraft Part (LSAP) that are applicable to a specific aircraft.This list may be contained on data supplied by the TC holder in aService Bulletin (SB), Service Information Letter (SIL) or IllustratedParts Catalogue (IPC), or as a separate tracking system.(b)Field Loadable Software (FLS)Software (executable code) that can be loaded without removing thesystem or equipment from the aircraft. FLS can be loaded onto anaircraft system by a maintenance mechanic/technician in accordancewith defined maintenance manual procedures. FLS can be configuredas a component of target hardware and thus affect the part number ofthe target hardware. There are numerous types of FLS, but most canbe categorised as follows:(i)Loadable Software Aircraft Part (LSAP)FLS that is required to meet a specific airworthiness oroperational requirement or regulation and not considered as acomponent of the target hardware, but is considered to be partof the aircraft approved design and therefore an aircraft partrequiring formal controlled release documentation (JAA FormOne, EASA Form 1 or FAA 8130-3) or an equivalent agreedwith the Director-General.(ii)User Modifiable Software (UMS)Software declared by the aircraft TC holder's designorganisation (or STC holder's design organisation) as beingintended for modification by the aircraft operator, usuallywithout review by the Director-General, the aircraft TCholder's (or STC holder's) design organisation or the equipmentmanufacturer, if modified within the constraints establishedduring certification. Should the need arise to modify thesoftware outside of these constraints then the operator will needto seek guidance from the Director-General, the aircraft TCholder's design organisation (or STC holder's designorganisation) and/or the equipment manufacturer on how thisshould be accomplished.30 September 2005 AN-43 P.2

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