Swiss investigators have yet to determine the reason for the nose-gear failure on a Croatia Airlines Bombardier Q400 which was forced to conduct a gear-up landing at Zurich.
The aircraft, arriving as flight OU464 from Zagreb, had already aborted its approach to runway 14 after informing the airport’s controllers that it was experiencing problems.
Following the missed approach the aircraft flew a holding pattern while the crew performed troubleshooting procedures.
But the Swiss investigation authority BFU states: “It was not possible to extend the nose landing-gear.”
The aircraft (9A-CQC) carried out a second approach to runway 14 and landed on its main gear and nose following the service on 27 September.
None of the 60 passengers and four crew members was injured, says the carrier, which adds that its pilots “precisely applied the prescribed procedure”.
Croatia Airlines, which claims this is its first such emergency landing, says the reason for the malfunction on the four-year old aircraft is “not known”. The fleet is regularly maintained in Zagreb’s maintenance centre, it adds, and has not experienced similar technical problems.