Cirrus SR22 SDRs

The following is derived from maintenance facility submissions to the FAA’s Service Difficulty Reports database.

Editorial Staff

Thursday, December 12, 2024 at 08:01 AM ET

Verified

Key Takeaways:

Multiple instances of critical electrical system failure were reported, stemming from issues like master control unit malfunctions, loss of power, and damaged data logger wiring.
Mechanical problems included a throttle stuck due to a broken alternate air valve and excessive elevator play caused by a loose pitch trim motor, with the latter identified as a recurring issue.

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Stuck Throttle

Broken Alternate Air Valve

Pilot reported throttle stuck half way open during flight. Disassembled wye pipe housing the alternate air flapper valve and filter. Discovered most of the flapper valve broken off and lodged in the throttle body, preventing the throttle from closing. Installed new alternate air flapper valve assembly (p/n 15710-002). The failure seems to originate where the radius of the hinge meets the flat surface of the valve on either side of the sandwiched flapper.