A320 One Engine Taxi on arrival with APU INOP
 

On A320/321 aircraft with NEO Engines with APU under MEL can we carry out One Engine Taxi on arrival?

Not according to my MEL.
If you loose GEN1 during taxi you will be in an interesting situation.

Jet2's new NEOs have the SETWA mod, which allows both extinguisher bottles to be available.

So I guess you'd have to check your fit.

SETWA does not mean you don’t need a serviceable APU. What happens when you loose Gen1 during SETWA? You will be in EMER ELEC on BAT only with no nosewheel steering. All displays are lost. Can you now start engine 2 to recover some normalcy and resume taxi?

Interesting logic, you're taxiing, not flying - why is nobody worried then about your running engine failing during single engine taxi? No such restrictions in the Boeing world... We don't start the APU for single engine taxi.

Because you will be as good as stuck on the taxiway. We don’t start the APU either on the NEO’s and modified older models. That’s the difference between SETWA and OETA. But the APU needs to be serviceable for both.

Who is "we"?

MEL for CEOs and non-modified older models does not permit single-engine taxi operations with APU inoperative.

However there is no such prohibition for written NEOs and modified models in the MEL.

Why would you need to consult an MEL after dispatch?

OP asked if single-engine taxi on arrival is permitted with the flight dispatched with APU under MEL.

12 years on the bus. Except for a few months when SETWA was being worked on, always (with the exception for some tight locations or steeper taxiways) single engine taxi, inbound and outbound, APU working or not. Nothing in the APU MEL for either CEO or NEO forbidding it. Risks/Chances of the single engine failing with the APU deferred, and problems associated with that failure (needing a tow, that is pretty much it) are apparently low enough (in the time I worked there, more than 5 million taxi movements without that one engine failing).

Ah right, read the effing question! 🤣

Good to know. It’s indeed a risk assessment for the airline to make wether it is prudent to SETWA with an inop APU. Just to nitpick, it’s not per se the engine failing that might cause problems, a ‘simple’ GEN1 failure would get you stuck more or less instantly on the taxiway with a very dark aircraft. There might be other issues as well why it’s included in our MEL, but this is the most obvious one.

Anyway, just curious here. If you SETWA for departure with an INOP APU, you would have to cross-bleed start engine two during taxi. Did your company really expect you to do that?

All our aircraft are SETWA, but according to our MEL (CEO & NEO) we do need a serviceable APU. Obviously for SETWA it won’t be started but we need to be able to start it when required.

Why would you want to do that?
....extra points?