Fears for Brindabella Air after planes grounded Brindabella Airlines absorbed Newcastle-based Aeropelican in June. Pictured are Aeropelican's chief pilot Steve O'Dwyer, Brindabella's CEO Paul Schutz, and Brindabella's chief commercial officer James Blake. There are fears regional NSW carrier Brindabella Airlines could be in a precarious financial position now that eight of its 10 aircraft are grounded by the Civil Aviation Safety Authority (CASA) for maintenance reviews. Commonwealth Bank of Australia has a fixed and floating charge over the airline's assets and forensic accounting firm KordaMentha is understood to be closely monitoring the situation. Brindabella has licences to operate as the monopoly carrier on key regional NSW routes providing services between Sydney and the towns of Cobar, Moree, Mudgee, Narrabri and winter-only services to Cooma. The Canberra-based airline's owners, Business Air Holdings, have not lodged accounts with the corporate regulator in recent years. Qantas Airways last month revoked a codeshare with Brindabella after CASA initially grounded four of its Jetsream planes because engine inspections were overdue. Two of those aircraft are now back in service, but CASA on Thursday grounded a further six Jetstream and Metroliner planes. Transport for NSW said it was working on alternative transport arrangements for communities impacted by action taken by CASA including additional NSW TrainLink coach services between affected communities and other regional airports. "[The CASA] action is likely to have significant impact on the airline's schedule on licensed routes," a Transport for NSW spokeswoman said on Friday. She said Transport for NSW had formally requested Brindabella address concerns surrounding the provision of air services as outlined in its air licence. Brindabella on Friday said the additional inspections ordered by CASA would "undoubtedly result in some disruption" in its network. "Brindabella look forward to restoring scheduled services very shortly and apologise to any of its loyal customers who may have been affected," the airline said. It added flights scheduled to operate on Friday and over the weekend had not been affected. The airline has cancelled dozens of flights in recent weeks and temporarily suspended its services between Sydney and Orange, which is not a monopoly route.