# Incident 19970818027079I: Enstrm 280F, Apple Valley, CA, August 18, 1997

- Type: FAA incident report (Accident/Incident Data System), as reported
- Date: August 18, 1997, 07:50 local time
- Place: Apple Valley, CA
- Airport: Apple Valley Airport
- Damage: Minor damage
- Phase of flight: Fcd/Prec Ldg From Cruise
- Operating rules: General operating rules (Part 91)
- Location: 34.5753° N, 117.1862° W: Placed by OpenAirDocs at APPLE VALLEY (APV), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=34.5753&lon=-117.1862&mi=10
- Aircraft: N14RS (not matched to a registry record)
- Reported make and model: ENSTRM 280F
- Reported engine: LYC HIO360*
- People aboard: 2
- Fatal injuries: 0
- Pilot flight hours: 9,000 total, 65 in this make and model, 75 in the last 90 days
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19970818027079I

## Narrative

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

NARRATIVE: THE COMMERCIALLY RATED FIXED WING AND HELICOPTER CFI, WAS GIVING THE OWNER OF THIS HELICOPTER INSTRUCTION IN PREPARATION FOR HIS COMMERCIAL HELICOPTER ADD-ON FLIGHT TEST. DURING THE SECOND TAKEOFF TO A LOW HOVER TO BE FOLLOWED BY A POWERED LANDING, THE AIRCRAFT SUDDENLY YAWED SHARPLY TO THE RIGHT. THE INSTRUCTOR IMMEDIATELY APPLIED FULL LEFT PEDAL TO STOP THE YAW, BUT THE AIRCRAFT CONTINUED TO YAW. THE INSTRUCTOR THEN APPLIED DOWN COLLECTIVE AND ATTEMPTED TO FLARE BUT THE YAWING MOTION CONTINUED. AT THIS TIME THE INSTRUCTOR BOTTOMED THE COLLECTIVE, SETTING THE HELICOPTER DOWN HARD. THE HELICOPTER CAME TO A REST, BUT THE RIGHT SKID WAS DAMAGED IN THE HARD LANDING. POST INCIDENT INVESTIGATION REVEALED AN INTERNAL FAILURE OF THE TAIL DRIVE SHAFT COUPLING, PART NUMBER 28-13614-1 PART NAME COUPLING HUB, LOCATED AT THE MAIN ROTOR TRANSMISSION TAIL ROTOR OUTPUT DRIVE SHAFT. REQUEST THAT THE MECHANIC SUBMIT A MALFUNCTION AND DEFECT REPORT. THIS INCIDENT IS CLOSED.

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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