20001010018969A

Accident · No damage

FAA accident report · Enstrm F-28F · Twin Falls, ID · October 10, 2000

Date: October 10, 2000 · 08:30 local
Place: Twin Falls, ID
Airport: Twin Falls-Sun Valley Reg Josl
Operating rules: General operating rules (Part 91)
Damage: No damage
Aircraft: N223RS
NTSB investigation: NTSBSEA01LA003
Reported as: Enstrm F28F

N223RSRegistered now · Enstrom F-28FS/N 748 · Built 1987 Airframe modelEnstrom F-28F Engine modelLycoming HIO-360 seriesReciprocating

From the FAA’s Accident/Incident Data System (AIDS), through its Aviation Safety Information Portal, as reported. The NTSB investigates accidents separately, and its record of an accident is the fuller one. The aircraft is matched to the registry 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.

What happened

The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.

(-23)These flights were maintenance test flights. During the third auto-rotation of N233RS, when the collective was dropped. The engine throttle rolled off too FAR. This required the pilot to advance the throttle to increase power avail. Before he could pull collective to terminate the auto-rotation. Power was obtained at too low an altitude causing the a/c to contact the ground with a higher than normal vertical descent.

As the FAA filed it

(-23)THESE FLIGHTS WERE MAINTENANCE TEST FLIGHTS. DURING THE THIRD AUTO-ROTATION OF N233RS, WHEN THE COLLECTIVE WAS DROPPED. THE ENGINE THROTTLE ROLLED OFF TOO FAR. THIS REQUIRED THE PILOT TO ADVANCE THE THROTTLE TO INCREASE POWER AVAIL. BEFORE HE COULD PULL COLLECTIVE TO TERMINATE THE AUTO-ROTATION. POWER WAS OBTAINED AT TOO LOW AN ALTITUDE CAUSING THE A/C TO CONTACT THE GROUND WITH A HIGHER THAN NORMAL VERTICAL DESCENT.

NTSB investigation

The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.

NTSB SEA01LA003Accident · No injuriesLimited investigationFinal reportTwin Falls, IDThe pilot's failure to maintain adequate rotor rpm. Unsuitable terrain was selected for the maintenance test flight operation.Oct 10, 2000 · Substantial damage