N201MKTurbo Posted May 24, 2020 Report Posted May 24, 2020 I would still use the procedure the maintenance manual until it is superceeded. the rules require it. 2 Quote
alextstone Posted May 24, 2020 Report Posted May 24, 2020 15 minutes ago, N201MKTurbo said: I would still use the procedure the maintenance manual until it is superceeded. the rules require it. Yep, agreed. BTW, I sent an email to PPG asking about this issue and within a couple of hours, on a Sunday during Memorial Day weekend no doubt, I received this response: "Alex:As long as you are using 100LL AVGAS, and apply and cure correctly, you should have no issues. PR-1005L has been used successfully as an aircraft slosh coat for 70 years.There can be potential issues if you use Mogas that contains alcohol.Remember that this product cures via solvent evaporation. Make sure you have good airflow through the tank.Regards,Bill" bill.keller@ppg.com Makes me wonder if the mechanic might have also failed to allow the sealant to cure with proper ventilation prior to closing the bay and refueling...in any case, it's a great relief that@mattbucy did not suffer any injury. 1 Quote
mattbucy Posted May 25, 2020 Author Report Posted May 25, 2020 (edited) @alextstone We did test my fuel and none showed dissolved PR-1005L. It was never conclusively determined what caused my engine incident, but fuel contamination from dissolved PR-1005L sealant was ruled out. The only reason we suspected PR-1005L was that PPG told us it might dissolve, which was pretty shocking to hear. I did a few tests myself with it. Ethanol definitely softens it. But, 100LL doesn't seem to affect it. The rep at PPG also told me that PR-1005L is not necessary due to improvements in primary sealants but Mooney will not remove it from the manual. PR-1005L was developed 70 years ago for the Lockheed Constellation to fix its leaky tanks. Perhaps Mooney thought, oh this will solve our leaky tanks too. Edited May 25, 2020 by mattbucy 3 Quote
alextstone Posted May 25, 2020 Report Posted May 25, 2020 Thank you, Matt, for the follow up. How is your aircraft running now? Were you made whole by the insurance company? Alex Quote
carusoam Posted May 26, 2020 Report Posted May 26, 2020 Great reply Matt! Wasn’t sure you were going to be back so quick... Long time, no posts... Best regards, -a- 1 Quote
mattbucy Posted May 26, 2020 Author Report Posted May 26, 2020 @alextstone Aircraft has run fine since, no issues, thanks. No leaks either. And, yes, thankfully, insurance did its job. Good luck with your reseal! 1 Quote
mattbucy Posted May 26, 2020 Author Report Posted May 26, 2020 @carusoam Thanks Yeah, I'm mostly a lurker haha. 2 Quote
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