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Kapitel 5 Anhang
be shown on switching on and an audio alarm will sound which can be cancelled by
pressing "ESC".
4.2. Electronic Security. If the internal security mechanism has been activated (such as by
opening the case), any data in the memory will be lost, settings will revert to defaults, and
the electronic security algorithms in the FR will be trashed. Any flight data files
subsequently produced will fail the VALI-FIL test for electronic security. This test will also
fail if the *.FIL or *.IGC file has been altered in any way after downloading from the FR.
4.3. FR found to be unsealed. If either physical or electronic security is found to have
failed, the FR must be returned to the manufacturer or his appointed agent for
investigation and resealing. A statement should be included on how the unit became
unsealed.
4.3.1. Checks before re-sealing. Whenever any unit is resealed, the manufacturer or agent
must carry out positive checks on the internal programmes and wiring, and ensure that
they work normally. If any evidence is found of tampering or unauthorised modification, a
report must be made by the manufacturer or agent to the Chairman of GFAC and to the
NAC of the owner. The IGC approval of that individual unit will be withdrawn until the unit
is re-set and certified to be to the IGC-approved standard.
5. Analysis of Flight Data. Analysis should be through the use of an analysis programme
which complies with IGC rules and procedures and is approved for this purpose by the
relevant NAC. For a list of programs which are capable of reading and displaying flight
data in the *.IGC file format, see the IGC/GNSS web site under the link button to
SOFTWARE (the full web reference is at the beginning of this document). Before a Flight
Performance is officially validated, the authority responsible for validation must check that
the data in the *.IGC file has originated in a valid way from the Recorder concerned, and
has not been altered after it was download from the Recorder to a PC. This is simply done
by checking the IGC data file with an authorised copy of the VALI-FIL.EXE short program.
The VALI program is on a single file relevant to the Recorder concerned, and the file must
have originated from the current FAI/IGC web site for software at the beginning of this
document. See Annex B for how to use the VALI program file with any IGC flight data file.
6. Manufacturer's Changes. Notification of any intended change to hardware, firmware or
software must be made by the manufacturer to the Chairman of GFAC so that a decision
can be made on any further testing which may be required. This includes changes of any
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