Even while a CAAN investigation team begins its probe of the crash of a Yeti Airlines Twin Otter crash in Jumla on 22 June that killed nine people, aviation experts have called for stricter flying codes. Eye-witnesses said the Twin Otter was trying to be ahead of a Sita Air Dornier also flying into Jumla, but found its air speed too high for a landing. The pilot then flew on to the other end of the runway for another approach. The plane stalled and crashed while making what eye-witnesses said was an excessively tight turn. Preliminary findings of the Jumla crash point to several possibilities: crew fatigue, movement of cabin cargo during tight turn, inexperience of one of the pilots. There have been seven Twin Otter crashes since 1998 in Nepal killing 85 passengers and crew, nearly all have been due to pilots flying into mountains in bad weather. CAAN said this week it was investigating two other pilots for reckless flying.