ANC97LA046

NTSB accident investigation · Beech G18S · Nome, AK · March 21, 1997

Accident · No injuriesLimited investigationFinal report
Date
March 21, 1997, 17:15 local (21:15 UTC)
Place
Nome, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N555CGBeech G18S
Weather
Visual (VMC) · Day
Status
Completed · report May 4, 1998
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19970321004839A
Case key
2980

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

fracture of a propeller blade tip.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Propeller failure/malfunctionCruise
Propeller system/accessories,blade - fracturedCause

Analysis

Shortly after reaching cruise altitude, the pilot heard a loud noise and felt a vibration in the left engine. He shut the left engine down, and returned to his departure airport. Upon landing, it was discovered that approximately eight inches of a propeller blade tip attached to the left engine had separated and impacted the nose section of the airplane. The blade tip damaged a former in the nose, and then traveled into the right engine nacelle. A small nick was observed on the remaining blade surface that coincided with the fracture plane.

Factual narrative

On March 21, 1997, about 1715 Alaska standard time, a wheel equipped Beech G-18S airplane, N555CG, sustained substantial damage when approximately eight inches of a propeller tip separated from a propeller blade on the left engine and penetrated the nose of the airplane, coming to rest in the right engine nacelle. The solo airline transport certificated pilot was not injured. The 14 CFR Part 135 cargo flight departed Nome, Alaska, about 1715, and was en route to Gamble, Alaska.

According to the operator's chief pilot, the pilot of the accident airplane reported the propeller tip separation occurred shortly after reaching cruise altitude. The pilot shut down the left engine, returned to Nome and landed without incident. An examination of the remaining portion of the propeller blade disclosed a small nick on the surface of the blade that coincided with the juncture of the fracture plane.

The accident airplane received damage to a former in the nose section, just in front of the radio bay.

Aircraft

Registration
N555CG
Reported as
Beech G18S
Category
Airplane
Serial number
BA539
Airframe hours
16,867
Engine
P&W R985, 450 horsepower, reciprocating
Damage
Substantial damage
Flight
Part 135
Registered owner
Grant Aviation
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · March 12, 1997 · 20 hours before
Departed
OME
Destination
GAM · Gamble, AK
Flight plan
Company VFR

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
40
Certificates
Airline transport, Flight engineer, Flight instructor
Airplane ratings
Single-engine land, Multi-engine land, Single-engine sea
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
5,900 total · 850 in this make and model

Weather

Conditions
Visual (VMC) · Day
Visibility
50 statute miles

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.