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19900130001369A

Accident · Substantial damage
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FAA accident report · Bolkms BK117A1 · Janesville, WI · January 30, 1990

FAA Aviation Safety Information Portal

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Date
January 30, 1990 · 13:10 local
Place
Janesville, WI
Phase of flight
Pwr Off Vert Land/Autorotate
Operating rules
General operating rules (Part 91)
Operator
AYUA
Damage
Substantial damage
Aircraft
N117M
NTSB investigation
NTSBCHI90LA074
Reported as
Bolkms BK117A1
Reported engine
Lycoming LTS101650B1
People aboard
2
Fatal injuries
0
Pilot’s flight hours
5,869 total62 in this make and model78 in the last 90 days
N117MRegistration cancelled Feb 22, 2013 · MBB BK 117 A-3S/N 7023Airframe modelMBB BK 117 A-3

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.

Engine cowling came loose on test flight. Emergency landing due to damaged rotors.

As the FAA filed it

ENGINE COWLING CAME LOOSE ON TEST FLIGHT. EMERGENCY LANDING DUE TO DAMAGED ROTORS.

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 CHI90LA074Accident · No injuriesLimited investigationFinal reportJanesville, WIThe pilot-in-command failed to ensure that the engine cowling latches were properly secured prior to departing on the maintenance test flight; the cowling came loose during flight, and contacted the main rotor blades before it separated from the helicopter.Jan 30, 1990 · Substantial damage