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SDR CA040301005

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Service difficulty report · Support · Snias AS350B2

FAA SDR system

Difficulty date
February 16, 2004
Submitted
April 1, 2004
Operation
General aviation
Make and model
Snias AS350B2
Aircraft time
3,338 hours, 50,594 cycles
Engine
Tmeca ARRIEL1D1
System (JASC)
5302 · Rotorcraft Tail Boom
Part
Support
Part number
350A2310534451
Condition
Cracked
Location
Tail Boom
Stage of operation
IN
How discovered
V
Nature of condition
O
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

(CAN) A CRACK WAS DISCOVERED IN MAY ON THE NR 5 HANGER BEARING SUPPORT. THIS PART WAS REPLACED IN THE FIELD USING ALL THE APPROPIATE TOOLING. SOMETIME LATER THE PILOT COMPLAINED OF A HIGH FREQ VIBRATION. THE SHAFT WAS REBALANCED TO .2 IPS. AGAIN ABOUT 20 HOURS LATER THE PILOT COMPLAINED OF A HIGH FREQ, AGAIN IT WAS DETERMINED THE SHAFT WAS OUT OF BALANACE. FURTHER INVESTIGATION DETERMINED THE HANGER SUPPORT WAS AGAIN CRACKED.