Originally Posted by
ARRAKIS
Russian Federatian AIP requires for such flights like the one of the "101" to XUBS the presence of a Russian navigator on board of the aircraft.
On what basis that rule was ignored?
Because it is not mandatory? Page 131:
1.17.8. Provisions of the Russian AIP
In compliance with Para 3.10 GEN 1-2.9 of the Russian AIP, foreign aircraft flying to airdromes not open for international flights should be escorted (led). As was mentioned in Section 1.1. the flight request supplied by the Polish Embassy in the Russian Federation contained a request for a navigator (leaderman). Further the Polish side refused the leaderman services.
Page 136:
There was no navigator-leaderman on board the aircraft. According to the available information, after submitting the initial flight permission request the Polish side refused the leaderman services explaining that the crew had sufficient mastery of Russian.