Pilot Debrief

Air Tractor AT502 near Dalhart, TX — 2020-07-10

Final reportCEN20LA279
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Date
2020-07-10
Location
Dalhart, TX, USA
Aircraft
Air Tractor AT502
Registration
N61315
Category
Airplane
Highest injury
None
Fatalities
0
Phase of flight
Cruise

Probable cause

The total loss of engine power due to a failed fuel control unit bearing.

NTSB narrative

The operator reported that the pilot was returning to the airport after completing an aerial application when the engine lost power. The pilot executed a forced landing to a pasture. An engine examination revealed that the fuel control unit (FCU) input drive shaft would not rotate. Further examination established that the FCU input drive spool bearing had failed; however, the cause of the bearing failure could not be determined. Maintenance records indicated that the FCU was within the inspection and overhaul requirements recommended by the manufacturer.

Analysis

Primary failure mode
Engine power loss
First missed decision gate
Inspect fuel control unit bearings before flight to prevent engine failure.

NTSB coding

Evidence available

  • Photos
  • 7 docket documents
View NTSB final reportView NTSB docket

Docket documents7

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