Engine alarm chirps

Sep 23, 2009
1,475
O'Day 34-At Last Rock Hall, Md
Universal m25 xpb panel alarm this morning started chirping after the first 15 minutes of running. Normal temp and oil pressure. It was so quiet and fast that I mistook it at first for something loose on the cockpit vibrating. It ran fine the day before. Oil pressure read 50 temp 158.
 

Tom J

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Sep 30, 2008
2,301
Catalina 310 Quincy, MA
Fairly common issue on the M25-xpb. Usually a loose connection on the oil pressure switch. Maybe try crimping the slide on connector a bit, and zip tie the harness to secure the leads.
 
Sep 23, 2009
1,475
O'Day 34-At Last Rock Hall, Md
Thank you both. Will look at sensor and connectors this weekend. Hopefully not a dirty sensor as only 350 hrs on engine and frequent oil changes. Will post final outcome.
 
Apr 16, 2019
9
Catalina 310 107 Rogersville, AL
@njlarry Did you figure out what it was? I had the same today on my C310 with a M25XPB as well. I had recently been through a hose leak, refill, bleed, etc. so I thought all was well but I got just a bit of intermittent chirping. Same as you re: temp and oil pressure almost identical.