PT6A Question

[pudnocker]

Hey now!


Looking for ways to tell if your PT6A-20A has been upgraded to a -21 on a C90. What to look for on the airplane. Assume no logbooks.

Thanks

Pud

 

[cdog]

Not real sure externally how to tell except for the data plate. Internally, the -21 has a much more durable hot section. -20 has a single fuel manifold, I think that the -21 might have a multiple fuel manifold. Haven't really seen a -20 for about 12 yrs. Operated a DHC-6-100 for a while, real dog. Converted it to -27s, then it was a real good airplane.

 

[flint4xx]

No logbooks?

Customs siezed aircraft? Repo? Any other reason and I wouldn't get too close if I were you.

 

[erj-145mech]

PT6A-20/21

The -20 has single and the -21 have duplex fuel nozzles, in other words, the -21 will have parallel fuel pipes around the can.

But without logs, you don't know the status of life limited components inside.

 

[pudnocker]

Got it

Thanks all for the replies. The temps on the - 21 are lower than the -20A in the POH. Plus the data plate was a definite giveaway. Amazing what you can find out when you open your eyes.