# Incident 20230102000909I: Cessna 421C, Twin Falls, ID, January 2, 2023

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: January 2, 2023, 14:00 local time
- Place: Twin Falls, ID
- Airport: Magic Valley Regional Airport
- Damage: No damage
- Phase of flight: Takeoff: Departure Roll
- Operating rules: General operating rules (Part 91)
- Location: 42.5641° N, 114.4609° W: Placed by OpenAirDocs: center of Twin Falls, ID, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=42.5641&lon=-114.4609&mi=10
- Aircraft: N8181G, registered now (https://openairdocs.org/aircraft/N8181G) (OpenAirDocs)
- Registry model: Cessna 421C (registry code 2076016, https://openairdocs.org/model/cessna-421c) (OpenAirDocs)
- Reported make and model: CESSNA 421C
- People aboard: 4
- Fatal injuries: 0
- Other injuries: 0
- Pilot certificates: Airline transport
- Pilot flight hours: 30,000 total
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20230102000909I

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

PIC STATED THAT AFTER THROTTLE UP FOR TAKEOFF HE PERFORMED A LOW-SPEED ABORT BECAUSE LEFT ENGINE FAILED TO PRODUCE ADEQUATE TAKEOFF THRUST. LEFT ENGINE RUN-UP ON THE TAXIWAY CONFIRMED THAT LEFT ENGINE WASN'T MAKING TAKEOFF THRUST. ON SHUT-DOWN, THE LEFT PROPELLER WENT TO FEATHER. OWNER HAD LOCAL MAINTENANCE REMOVE LEFT PROPELLER FOR OVERHAUL AT A BOISE, IDAHO REPAIR STATION.

THE REPAIR STATION REPORTED THAT THE TWO LOW PITCH STOP SCREWS (ARROWHEAD SCREWS) WERE FOUND BROKEN OFF AND EMBEDDED IN THE ALUMINUM PLATE THAT HOLDS THEM. THE REPAIR STATION REPORTED THAT THE BROKEN PIECES WOULD HAVE IMPEDED THE PROPELLER FROM ACHIEVING FULL INCREASE RPM PITCH SETTING CAUSING THE LOW THRUST AT TAKEOFF POWER. THE LOW PITCH STOPS ARE RECOMMENDED REPLACEMENT AT 6 YEARS. THE BROKEN LOW PITCH STOPS HAD BEEN IN SERVICE FOR APPROXIMATELY 12 YEARS.

## Other reports on N8181G (1)

Matched to the same aircraft by N-number and date.

- [Incident 19920529024429I](https://openairdocs.org/incident/19920529024429I), May 29, 1992: Cessna 421C (N8181G), Waco, TX, Minor damage. Smoke from left engine after takeoff. Returned.nose gear folded. Found broken hydraulic line,allowing fluid to leak.

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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