ANC07LA066

NTSB accident investigation · Beech 58 · Northway, AK · July 12, 2007

Accident · No injuriesLimited investigationFinal report
Date
July 12, 2007, 12:53 local (20:53 UTC)
Place
Northway, AK
Injuries
4 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N820GWBeech 58
Weather
Visual (VMC) · Day
Status
Completed · report March 31, 2008
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
Federal Aviation Administration
FAA report
20070712013019A
Case key
66206

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

On this page

Probable cause

The collapse of the landing gear during the landing roll for an undetermined reason.

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.

Gear collapsedLanding - roll
Landing gear,normal retraction/extension assembly - disengaged
Reason for occurrence undeterminedCause
Terrain condition - runway

Analysis

The airline transport pilot was landing a twin-engine retractable wheel airplane on a gravel-covered runway while on a cross-country personal flight. He said that after an uneventful touchdown, the right main landing gear collapsed, followed by the left main landing gear, and finally the nose landing gear. The airplane sustained substantial damage to the wings and fuselage. A postaccident inspection of the airplane by an FAA airworthiness inspector disclosed a fractured rod end assembly, which was part of the landing gear extension and retraction system. The FAA inspector noted that he was unable to determine whether the fractured rod end assembly was a factor in the landing gear collapse, or if the rod end fractured as a result of the landing gear collapse.

Factual narrative

On July 12, 2007, about 1253 Alaska daylight time, a twin-engine Beech Baron 58 airplane, N820GW, sustained substantial damage when the landing gear collapsed after landing at the Northway Airport, Northway, Alaska. The airplane was being operated as a visual flight rules (VFR) cross-country personal flight under Title 14, CFR Part 91, when the accident occurred. The airline transport certificated pilot and the three passengers were not injured. Visual meteorological conditions prevailed, and a VFR flight plan was filed. The flight departed the Whitehorse Airport, Whitehorse, Canada, about 1045.

During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC) on July 12, the pilot reported that after an uneventful touchdown on the gravel-covered runway, the right main landing gear collapsed, followed by the left main landing gear, and finally the nose landing gear. The pilot reported that there were no known problems with the landing gear prior to the accident. Airport maintenance personnel removed the accident airplane from Runway 23, and transported it to a parking area.

During a telephone conversation with the NTSB IIC on July 13, the Northway Federal Aviation Administration (FAA) Flight Service Station (FSS) specialist on duty at the time of the accident reported that the landing gear on the accident airplane appeared to be extended during the final landing approach.

On July 13, a Federal Aviation Administration (FAA) airworthiness inspector, Fairbanks Flight Standards District Office (FSDO), examined the accident airplane, and subsequently discovered a fractured rod end assembly associated with the landing gear extension and retraction system. The inspector reported that he was unable to positively determine whether the fractured rod end assembly was a factor in the landing gear collapse, or if the rod end fractured as the gear collapse. The FAA inspector reported structural damage to the accident airplane's fuselage and wings.

Aircraft

Registration
N820GW
Reported as
Beech 58
Category
Airplane
Serial number
TH-13
Airframe hours
4,497.4
Engine
Continental IO-520, 285 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Glenn R. Carwelll
Registered owner
Promenfly Corp.
Airworthiness certificate
Standard, Normal
Last inspection
Annual · July 1, 2007 · 29 hours before
Departed
YXY · Whitehorse Yt
Destination
ORT · Northway, AK
Flight plan
VFR
Airport
ORT · Northway, runway 23, 5,100 × 100 ft, gravel

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
63
Injuries
None
Certificates
Military, Airline transport
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, With waivers/limitations
Last flight review
November 1, 2005
Seat
Left
Flight hours
2,725 total · 1,850 in this make and model · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Visibility
10 statute miles
Lowest ceiling
15,000 ft broken
Temperature
66 °F, dew point 43 °F
Altimeter
29.81 inHg
Observed at
ORT

FAA reports on this event · 1

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