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(3) Refer to the appropriate airline's documentation for the correct software part number or numbers for each software loadable LRU prior to performing this software loading procedure.
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(4) The procedures for software loading using off-airplane data loading equipment are documented in the respective supplier's off-airplane data loading equipment user's manual.
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(5) Refer to the airline's off-airplane data loading policy for additional off-airplane loading equipment and procedures information.
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ON-AIRPLANE SOFTWARE INSTALLATION - MAINTENANCE PRACTICES
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TASK 20-15-11-402-001
1. On-Airplane Software Installation_________________________________
A. General
(1) Software Installation Times
(a) The time required to install software in a component is variable and is dependent on several factors that include: 1) Retrieval of the correct software media, applicable
equipment and Maintenance Manual procedure. 2) Setup procedures. 3) Data transfer time. 4) Software configuration check. 5) Return to usual airplane configuration. 6) Airline completion procedures.
(2) Data Transfer Times
(a)
The data transfer time is the time from disk or disks insertion into the data loader until the data transfer is complete.
(b)
The data transfer time depends on: 1) The number of disks. 2) The type and size of software files on each disk. 3) The unique protocols and processors of the data loader. 4) The unique internal protocols and processors of the
component. 5) Disks inserted in a timely manner.
(c)
Typical data transfer times are:
1) Operational Program Software (OPS): approximately 5 to 16 minutes for each disk; for example, if the OPS has four disks, then the complete installation can take as long as 64 minutes.
2) Operational Program Configuration (OPC): approximately 1 to 3 minutes for each disk. 3) Databases (DB): approximately 3 to 15 minutes for each disk. 4) Airline Modifiable Information (AMI): approximately 3 to 15 minutes for each disk.
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(d) Short Load 1) Some components can do a short load. 2) During a short load, only pieces of software that are
different from what is already in the component are installed during data transfer. This can cause a data transfer time that is much shorter than the time given in Table 201. It is possible that some disks will not be used during software installation.
3) You know that the correct software is installed when the correct software part number shows for the software configuration check.
4) The flight management computer (FMC) is an example of a component that can do a short load.
(3) Table 201 - Data Transfer Times
(a)
Table 201 shows data transfer times for components that are approved for on-airplane software installation. Not all components are installed on all airplanes. If a component is installed on an airplane, then there is a software installation procedure applicable to that airplane. The software installation procedure is in the AMM chapter-section given in the table.
(b)
The types of software installed in a component on one airplane can be different than the types of software installed in the component on a different airplane. For example, the FMC navigation data base software must be installed in the FMC in all airplanes, but the other software that is necessary for the FMC is different for different FMC software part numbers. 1) A component on the list can have some hardware part numbers
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