STARTING A DC-9 APU AND HOW AN AIRCRAFT APU WORKS | Aircraft and Planes

#MondOrtiz #DPRPATS Here, we will run-up the APU of a McDonnell Douglas DC-9 jet that belongs to DPR-PATS located at Plaridel, Bulacan. We also talk about how an APU or Auxiliary Power Unit works and what it is for. Thank you to DPR-Philippine Academy in Technology and Sciences (DPR-PATS) located at Plaridel, Bulacan for allowing me to shoot this video in their campus.