The poor CFI got a shock this morning with sudden significant vibration from the rotor head.
The description of the event is:-
Start and airtaxi, nothing out of the ordinary.
Significant vibration starts in the climb, occured intermittent downwind and to land. Continues in air taxi back to the stand.
Vibration felt throughout the aircraft but INTERMITTENT, and tending to occur during pitch changes (hence more during air taxi).
Described as "like flying in high wind condition" but wind was under 5kts.
Examiner who flew it last, describes slight mis tracking on the main blades.
Engineer has a view on potential cause.
Aircraft had annual 7hrs ago. No known defects and nothing obvious (or not obvious) in a visual and 'manual' inspection after the incident. No leaks, cracks in the blade, dents, loose transmission parts, tail rotor still attached.
H-R interested to hear if other people have experienced rotor head vibration in a 44 and the cause.
Discuss
h-r
(who has turned blue at the chill of the cost..)