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wof 25th Nov 2011 15:45

Help
 
Why do some pilots set transponder code 2000 (usually after landing) in some aircrafts like Boeing 737? Any ideas?

Intruder 25th Nov 2011 15:49

It is an innocuous code that will not affect anyone if inadvertently activated.

Spitoon 25th Nov 2011 16:06

In many ICAO Regions A2000 is used for aircraft which have not been assigned a transponder code. As Intruder says, it's a 'safe' code to leave set.

fantom 25th Nov 2011 16:08

It is what you do to avoid the next take-off transmitting the last flight's code (that has not been re-set).

Too Few Stripes 25th Nov 2011 16:47

It's nothing to do with aircraft type but everything to do with the country. It is a notified ICAO difference in the UK for example.

Jumbo Driver 25th Nov 2011 17:37

In UK, it is a requirement of the AIP under ENR 1.6.2 - SSR OPERATING PROCEDURES, para. 2.1 (e), which reads:
2.1 Some Mode A codes are reserved internationally for special purposes and should be selected as follows:
(e) Code 2000. When entering United Kingdom airspace from an adjacent region where the operation of transponders has not been required; or by Mode S transponder equipped aircraft on the aerodrome surface when under tow, or parked and prior to selecting OFF or STDBY - unless otherwise instructed by ATC.


JD
:)

framer 25th Nov 2011 19:50

In Ausi it's 3000.
Like has been said, if you forget to load your assigned code, it will already be transmitting the code for a/c who haven't been assigned a code :)


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