I have emailed Cambridge about this and they informed
me that it was normal for engine noise detection when
the gear is down. I would love to see a trace with
a model 20 inside of a 1-26,2-33 or Blanik..... The
logger would probably self destruct from the noise......LOL
Brian
17

I would guess that the ENL system on this recorder
is in need of
adjustment/repair.

Best regards,

Tim Newport-Peace.
Technical Advisor to
Global Navigation Satellite System
Flight Recorder Approval Committee (GFAC)
of the International Gliding Commission
of the Federation Aeronautique Internationale