RUDDER & WRENCH SAVVY MA INTENANCE /OPINION eFIRC Online Flight Instructor Refresher Course Choose us for experience and quality. * Effortless navigation with a responsive design for any screen size. * A blah-free experience with engaging multimedia. * Personal service by our expert team of CFIs when answering your questions. $124. No hidden fees! Includes FAA paperwork processing. Can a mechanic who wCan't sign it off?orks on your airplane refuse to put it back together? BY MIKE BUSCH Savvy Maintenance coverage sponsored by AIRCRAFT SPRUCE GET STARTED NOW EFIRC.COM/PILOT Supported by BOS TON - BASED CI RRUS OWNER Mark (not his real name) was flying his turbonormalized SR22 home to Norwood Memorial Airport (OWD) on what was probably going to be his last flight prior to putting the airplane in the shop for its 2024 annual inspection. While cruising over northern New England, the engine started running rough and the engine page on the multifunction display showed that the cylinder head temperature of cylinder number 2 had risen above 400 degrees Fahrenheit and was continuing to rise. Mark went full rich 90 AOPA PILOT / August 2024 and throttled back to stop the thermal runaway, and then declared an emergency with ATC and made a precautionary landing. After an uneventful landing, Mark taxied the Cirrus to the sole FBO on the field, which included a big Part 145 repair station that just happened to be a Cirrus authorized service center. He told the director of maintenance (DOM) about the rough-running engine and the rising CHT number 2, and asked that the shop troubleshoot the issue. Mark then rented a car and drove home to Boston. EVA VAZQUEZhttp://www.EFIRC.COM/PILOT