MT 3 bladed prop

[DrDave]

Originally Posted by JAG

Hi all,

Bumping an old thread here...

Just got word my front prop is a 'boat anchor' - too much corrosion to overhaul. I am faced with a decision - do I go with new McCauley's, or new MT's? Price is around the same (maybe a small advantage to MT) - but that is not the issue. I want to make the best choice for reliability, damage tolerance, performance and maintenance costs in the future.

Herb has posted some great feedback on the MT's and I am looking for some more views on propeller choices, and why you may choose one over the other.

Thanks in advance.

Jeff

I have a spare front prop and hub with log book that would bolt right on. Part Number: D2AF34C59-AMP. Looks like 250 hours since disassemble, service, assemble, check track, set angles, balance-complete reseal.

Dave

[JAG]

Dr. Dave - you have my attention...Potentially a much faster way to get back into the air. MT prop lead times are 8 to 10 weeks!

PM or call me; we can discuss a price.

I still have a decision to make though... the front prop that was removed did not have many hours since overhaul, but a few years for sure. The rear prop has way more hours and years on the aircraft, so based on the reason the front got rejected at overhaul, I am guessing the rear is in the same condition and will be scrap at next overhaul as well. The issue is internal corrosion on hub and on blade roots inside hub. This is due to an aircraft that was sitting and not utilized AND being in south Texas in the humid environment. I had to remove the front prop due to an oil leak, but I am pretty confident that the rear prop is not much further behind in giving me problems. These old props are not supported with parts anymore, and McCauley is pushing the current ones.

I believe it's a case of deciding "when" I buy new props, not "if".

Jeff

[Learjetter]

Information about the MT Prop Service Bulletin SB-30 is posted below in this thread. It seems the FAA has taken EASA's lead and determined the SB needs to be an Airworthiness Directive.

The latest version of the SB can be found on the MT Prop site here

The Federal Aviation Administration (FAA) plans to issue the following AD effective 16 SEP 2022:
2022-18-02

If the link doesn't work, or you're not enamored with the new FAA Dynamic Regulatory System, I'll attach the proposed AD from the DRS site.