Service difficulty report · Brushes · Snias AS350B3

Difficulty date
November 23, 2019
Submitted
November 25, 2019
Operation
Air carrier
Aircraft
N4204
Make and model
Snias AS350B3
Aircraft serial
4204
Aircraft time
4,892 hours, 14,638 cycles
Engine
Tmeca ARRIEL2B1
Engine time
4,892 hours, 11,269 cycles
Part
Brushes
Part number
050031
Condition
Failed
Location
Blower Motor
Component
Blower Motor
Component part number
050145
Stage of operation
AA
How discovered
O
Nature of condition
B
Precautionary procedure
O

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

What was found

PILOTS REPORT: AS THE AIRCRAFT APPROACHED THE SENDING HOSPITAL FOR PATIENT TRANSPORT, THE NURSE IN THE BACK DESCRIBED SMELLING AN ELECTRICAL BURNING TYPE ODOR. THE AIR CONDITIONING WAS IMMEDIATELY TURNED OFF AND THE WINDOWS WERE OPENED TO VENTILATE THE CABIN. THE SMELL BEGAN TO DISSIPATE. ONCE SAFELY ON THE GROUND AT THE HOSPITAL, THE MECHANIC WAS CALLED TO TROUBLESHOOT. MECHANIC REPORT: THE MECHANIC IDENTIFIED THE BRUSHES IN THE AFT BLOWER MOTOR TO BE FAULTY, AND REPLACED WITH NEW. THE AIRCRAFT WAS SUBSEQUENTLY GROUND RAN TO VERIFY THE INTEGRITY OF THE AIR CONDITIONING SYSTEM; ALL OPERATIONAL CHECKS WERE GOOD TO INCLUDE NO NOTICEABLE ODORS/SMELLS. THE AIRCRAFT WAS RETURNED TO SERVICE AT THAT TIME.