In article 5bs1d.43915$D%.38664@attbi_s51, Paul Remde
writes
Hi,

If the file is indicated as not secure when downloading with the PC utility
the 302 is most likely not sealed. The status of the seal is displayed on
one of the 302 LCD screens. I suggest you check that.

If it is not sealed you will need to send it back to Cambridge to be
re-sealed.

Certain Cambridge agents can also carry out the re-sealing. These are
not the normal sales agents, but those specially authorised by Cambridge
to carry out modifications and other internal work on their recorders.
Work that does not need to open up the sealed box, such as pressure
altitude calibrations, is different and is carried out by any
calibration organisation that is approved by the gliding NAC (SSA for
USA, BGA for the UK).

In general, the servicing agent authorised to work "inside" will check
that nothing has been altered inside the box, run a check on the
recorder unit, check internal connections etc for integrity, upgrade any
firmware (if the customer wants this, always a good thing to do) and
then the box is ready to re-seal. The agent contacts Cambridge and gets
a special re-sealing code that will only work with that particular
recorder. This is so that the code cannot be used again for a whole
series of recorders.

Other manufacturers have similar arrangements for secure re-sealing.

I do not know what the situation is in North America, any work inside
the sealed box (including re-sealing) may all have to be done at
Cambridge itself at Horn Lake, MI.

However, in the UK, RD Aviation (Oxford) and also Bicester Aviation
Services (Bicester) are allowed to carry out internal work on Cambridge
recorders, to avoid transatlantic travel for the recorder box. Similar
arrangements exist for some other countries.

I hope that puts the situation on re-sealing and servicing in
perspective.

--
Ian Strachan
Chairman IGC GFA Committee