The inflight loss of collective control of the helicopter due to thermal damage of a collective control torque tube that abraded with misrouted electrical wiring, which resulted in an electrical short and inflight fire. Contributing to the accident were the incorrectly manufactured wiring support strip assembly that misrouted electrical wires near the collective control torque tube, the ambiguity of the support strip assembly drawing that allowed for its incorrect manufacturing, the inadequate quality control processes to identify the incorrectly manufactured support strip assembly, and the helicopter manufacturer’s inadequate assembly instructions that allowed the misrouting of the electrical wiring, due to the incorrectly manufactured strip assembly, on the helicopter production line.
N811TA
2011 AGUSTAWESTLAND PHILADELPHIA AW139
Rotorcraft · Turbo-shaft · Standard
1 NTSB record
for this tail number, including substantial damage. See the full record below.
Registration
Airframe
Powerplant
Live Flight Status
Checking live traffic…
Coverage depends on ground receiver reception and is not a complete picture of traffic.
Transponder & Tracking
The hex code is the aircraft's ICAO 24-bit address, broadcast by its ADS-B transponder. It is the key used to match live position reports to this registration.
NTSB Accident & Incident Record
Sep 24, 2022
Accident
Substantial Houma, LA
InjuriesNone
Phase of Flight-
ConditionsVMC
OperationFAR 135
Probable Cause
NTSB CEN22LA430