In a small saucepan combine ½ cup chicken broth and chipotle powder and rice stir well.
Over med/high heat bring mixture up to a boil cover and turn heat off. Cook for 5 minutes.
In a separate pot add 1tbsp of oil and place pot on a med/high stove and bring oil to temperature just before smoking.
Add onion and cook until softened (about 5 minutes).
Stir in garlic, chili powder, and cumin cook until fragrant, about 30 seconds add remaining ¾ cup of broth, partially cooked rice, and beans bring to a boil.
Reduce heat to medium low, add chicken and cook covered until chicken registers 160° and rice is tender (about 15 minutes).
Transfer chicken to cutting board and let rest for 5-10 minutes.
Cut chicken into ½ inch pieces and combine with rice and bean mixture, cheddar, and cilantro.
In large, rimmed pot or Dutch oven add 3 cups of oil.
Place over med/high heat and bring up to a temperature of 325°
Whisk flour and water together.
Stack tortillas on a plate covered and place in a microwave oven for 30 seconds until pliable.
Work one at a time place ¼ of the chicken mixture in the middle of the tortillas.
Brush the edges of tortillas with flour paste.
Wrap top and bottom of tortillas tightly over filling.
Brush ends of tortilla with paste and fold into centre pressing firmly to seal.
Place 2 chimichangas, seam side down in oil and fry for 2 minutes turn over and fry for another 2 minutes.
Remove and place on a wire rack.
Bring oil back to 325° and fry remaining chimichangas.
Serve warm