Julie Twigg, of Nhill, died in Royal Melbourne Hospital on Monday morning, two weeks after she was seriously injured in an Angel Flight plane crash at Wallup which claimed the lives of her daughter Jacinda, 15, and pilot Don Kernot.

Mrs Twigg had been upgraded to a stable condition and had woken from a coma a week earlier and was talking.

Jacinda's funeral was at St Paul's Lutheran Church in Nhill on Monday afternoon with more than 400 mourners in attendance. Most of them had heard of Mrs Twigg's death that morning.

A group of Jacinda's friends wore her favourite colour aqua to the funeral as a tribute to the schoolgirl who suffered from juvenile arthritis.

Nhill Lutheran School principal Grant Fiedler told the Mail-Times Mrs Twigg was a dedicated member of the school community.

"The whole school community is in mourning. She was a deeply respected and valued member of the school community as a parent and volunteer," Mr Fiedler said.

"She was an active member of the school community and freely volunteered her time. She taught recorder to students, played 'It's your birthday' at morning assembly on the clarinet, was the leading recorder at ensemble performances, volunteered as a classroom helper and was an active parents and friends committee member; she previously held the position of treasurer.

"Julie was an extremely gifted music teacher and it was demonstrated by the standard of recorder ensemble performances. The performances were by far the best I have ever heard. I always felt proud when they played.

"Julie was a wonderfully caring person who lived her faith unashamedly. Her faith was an inspiration to me, which was shown by the way she served others.

"I praise God for her life through which so many blessings came."

Mrs Twigg ran her own business, Julie's Jewels, and fellow artist Karen Wiseman said she would be missed by the art community. "She was a lovely lady, a real lady, she was quiet but supportive. She was considerate and put her hand up to help wherever she could," Ms Wiseman said.

"Julie was very talented, but was willing to share her knowledge and expertise.

"Her passing has rocked our community. People are really supporting each other. Nhill is a very Christian-minded community and we are helping each other through this grief and shock."

Hindmarsh Shire Council's Twigg Family Appeal reached $20,000 on Monday. The appeal, through National Australia Bank, was set up to help Mrs Twigg's husband Lennie Twigg cover medical expenses and raise their two boys, aged 10 and 16.