Alert I with a ?

Had an Alert I the other day for a Navajo. The aircraft experienced a complete electrical failure prior to landing. My question for everybody is: What systems are affected by, or possibly affected by, the loss of electrical power?

The aircraft would have hydraulics, pump runs off the engines, so the gear would operate. The gear uses a hydraulic/electrical system so when the gear fully extends it electronically switches off the hydraulic pump to the landing gear. So it might burn up the hydraulic pump if the pilot is not careful. You would also have some control problems. The flaps would not extend so the aircraft would be landing hot (higher touchdown speed). The electric trim control and electrical fuel boost pump would not operate. The engine driven fuel pump would still operate however, I’m not real sure if the engine driven fuel pump could keep the "full power" fuel demands for the engines in the event of a go-around. All other flight controls are cable operated and the engine operates off the magneto system.

Here some photos I have of the Piper Navajo:

http://www.arff.info/images/navajo-1.JPG (http://www.arff.info/images/navajo-1.JPG)

http://www.arff.info/images/navajo-2.JPG (http://www.arff.info/images/navajo-2.JPG)

http://www.arff.info/images/navajo-3.JPG (http://www.arff.info/images/navajo-3.JPG) (NOTE: Two spark wires to each cylinder - duel mags)

http://www.arff.info/images/navajo-4.JPG (http://www.arff.info/images/navajo-4.JPG)

http://www.arff.info/images/navajo-5.JPG (http://www.arff.info/images/navajo-5.JPG) (Magnetos)

http://www.arff.info/images/navajo-6.JPG (http://www.arff.info/images/navajo-6.JPG) (Navajo stripped before annual inspection)

http://www.arff.info/images/navajo-7.JPG (http://www.arff.info/images/navajo-7.JPG) (Hydraulic - IN and OUT)

http://www.arff.info/images/navajo-8.JPG (http://www.arff.info/images/navajo-8.JPG) (Floor panels removed)

http://www.arff.info/images/navajo-9.JPG (http://www.arff.info/images/navajo-9.JPG) (NOTE: Overhead controls)

http://www.arff.info/images/navajo-10.JPG (http://www.arff.info/images/navajo-10.JPG) (NOTE: Red rocker switches are magneto control. Four mags for twin engine piston aircraft is the norm.)

http://www.arff.info/images/navajo-11.JPG (http://www.arff.info/images/navajo-11.JPG) (Throttle, Prop and Mixture control are common on twins)

http://www.arff.info/images/navajo-12.JPG (http://www.arff.info/images/navajo-12.JPG) (Fuel shut-down - always within easy reach of the pilot)

http://www.arff.info/images/navajo-13.JPG (http://www.arff.info/images/navajo-13.JPG) (Master Switch - located near pilots left elbow)

Don,

Great photos and notes. Another Excellent Job:thumbsup:

Hey....thanks for the replys. Great Pictures! One of my reasons for asking was evaluate whether this call should have been upgraded to an Alert II. Aircraft familiarization and knowledge is so important.

Aint that Don grand :thumbsup: Thats my training officer fellas.:banghead: <<< Thats Don after a couple of times talking to the boss about training.

Based only on what I see and read here you guys have a great training officer in Don. Enthusiastic and serious about what he does and dedicated. And in the ARFF industry that's not easy to maintain.