Service difficulty report · Resistor · Bell 407

Difficulty date
August 23, 2026
Submitted
August 26, 2026
Operation
Air carrier
Aircraft
N409LF
Make and model
Bell 407
Aircraft serial
56331
Aircraft time
1,677 hours, 4,778 cycles
Part
Resistor
Part number
ES630031
Condition
Failed
Location
Zone 100
Component
Vapor Cycle Sys · Aircom
Component part number
407EC2033
Stage of operation
CR
How discovered
O
Nature of condition
B
Precautionary procedure
H, A

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

What was found

DURING FLIGHT SMOKE/FUMES EMANATED FROM LEFT AIR CONDITIONING BLOWER. TROUBLESHOOTING REVEALED THAT A FAILED RESISTOR CAUSED THE BLOWER MOTOR TO FAIL AND PRODUCE SMOKE/FUMES. AIR COMM VAPOR CYCLE AIR CONDITIONING STC# SR00222DE INSTALLED.

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