Australian officials probing last month's engine blast on a Qantas flight have warned that a "critical safety issue" with Rolls-Royce engines on Airbus A380s could lead to "catastrophic" failure.
The Australian Transport Safety Bureau said on Thursday that a misaligned component had thinned the wall of an oil pipe in the exploded engine, causing "fatigue cracking" that prompted leakage and a fire "central to the engine failure".
"This condition could lead to an elevated risk of fatigue crack initiation and growth, oil leakage and potential catastrophic engine failure from a resulting oil fire," the ATSB said, noting it was "understood to be related to the manufacturing process."
The ATSB issued a directive urging Rolls-Royce to address the safety issue and take actions necessary to ensure the safety of flight operations in planes equipped with Rolls-Royce Trent 900 engines.
Qantas said it would immediately conduct further engine investigations as a result of the findings, but stressed it was just a precautionary measure and "there is no immediate risk to flight safety."
Legal action
The carrier also said it has begun court proceedings to allow it to pursue legal action against Rolls-Royce ""if a commercial settlement is not possible."
"Today's action allows Qantas to keep all options available to the company to recover losses, as a result of the grounding of the A380 fleet and the operational constraints currently imposed on A380 services," the airline said.
Qantas grounded all six of its Airbus superjumbos after the November 4 blast over the Indonesian island of Batam, which forced an A380 to return to Singapore airport trailing smoke.
Flights were resumed last week, though the superjumbo has been barred from trans-Pacific trips to Los Angeles due to the extra engine thrust required.
Qantas said it would determine whether further action would need to be taken after inspections were complete and it had consulted both Rolls-Royce and regulators.
Source:
Agencies

Ismail Omar
Police Air Unit Commander Datuk Chuah Ghee Lye has been appointed Melaka police chief replacing Datuk Mohd Rodwan Mohd Yusof who became Deputy Director II Commercial Crime Investigation Department (CCID) Bukit Aman.
Deputy Director II CCID Datuk Tajudin Md Isa was appointed Perlis police chief replacing DCP Ghazali Md Amin who was appointed Bukit Aman Secretary since Oct 29.
Management Training Division Principal Assistant Director Datuk Jamshah Mustapa was appointed Terengganu police chief replacing Datuk Mohd Shukri Dahalan who moved to Perak as police chief.
Mohd Shukri replaced Datuk Zulkifli Abdullah who was appointed Kuala Lumpur police chief on Oct 29.
Ismail was speaking to reporters after the Police Commission meeting chaired by Home Minister Datuk Seri Hishammuddin Hussein in Bukit Aman.
He said the changes were part of restructuring of promotions and transfer of state police chiefs and state deputy police chiefs. — Bernama