PPRuNe Forums - Technical question ;)

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Technical question ;)

Hi Guys

Thought I would rack the brain of you guys and ask your personal opinions and company procedures regarding the Start Up of engines during the Pushback of "Ferry A/C".

I am a Ground Services Training Manager and have been a Pushback Operator for 20+ yrs and have always been told "never start engines of "Ferry A/C" during Pushback due to the increased risk of A/C skipping and jumping which could potentially cause a Jack-knifing of the Pushback Tractor (Towbarless or Conventional).

Reently 1 of our Customer Airlines have reversed their policy and stated it is now safe to carry out this procedure doing Pushback.

I am asking the same question in the Pilots section and just want to measure the different approaches to this subject.

Why would any aircraft be dangerous to push back empty?

Why would any Airline backtrack on pushing out of a TIPO stand?

Both Ground and Airline surely have set procedures, and Ground have the final Ramp Mass of the departure, I do not understand why this is dangerous.