ANC05IA048

NTSB incident investigation · Reims F406 · Nome, AK · March 9, 2005

Incident · No injuriesIncident investigationFinal report
Date
March 9, 2005, 18:30 local (22:30 UTC)
Place
Nome, AK
Injuries
1 uninjured
Damage
Minor damage
Phase of flight
Approach
Aircraft
N6591RReims F406
Weather
Visual (VMC) · Day
Status
Completed · report April 25, 2006
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
Anchorage FSDO-03
Case key
61157

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

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Probable cause

The failure of the nose gear up lock actuator bracket during the landing approach due to fatigue cracking, which resulted in a nose wheel up landing. A factor associated with the incident is the mechanical binding of the nose wheel locking mechanism.

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.

Airframe/component/system failure/malfunctionApproach - vfr pattern - downwind
Landing gear,nose gear attach point - failureCause
Landing gear,gear locking mechanism - binding(mechanical)Factor
Wheels up landingLanding - flare/touchdown
Terrain condition - runway

Analysis

The airline transport certificated pilot of the Title 14, CFR Part 91, positioning flight reported getting an unsafe nose gear indication prior to landing, and was unable to extend the nose gear. He landed the airplane with the nose wheel retracted. An inspection of the nose landing gear up lock actuator bracket by the National Transportation Safety Board investigator-in-charge, revealed that both the left and right sides of the bracket had fatigue cracks that propagated from the top of each side to the top of a lightening hole near the center of each side. The lower portion of the bracket had distorted, changing its position relative to the nose wheel up lock mechanism, which rendered the up lock unable to disengage. Maintenance records indicated compliance with inspection guidelines for the affected area by the operator. The pilot reported that there were no other mechanical problems with the airplane prior to the incident.

Factual narrative

On March 9, 2005, about 1830 Alaska standard time, a Reims Aviation F406 airplane, N6591R, sustained minor damage during a landing with the nose wheel retracted, at the Nome Airport, Nome Alaska. The airplane was being operated by Hageland Aviation of Anchorage, Alaska, as a visual flight rules (VFR) positioning flight under Title 14, CFR Part 91, when the incident occurred. The solo airline transport pilot was not injured. Visual meteorological conditions prevailed, and a VFR flight plan was filed. The flight departed Savoonga Landing Strip, Savoonga, Alaska, about 1745.

During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC) on March 9, the director of maintenance for the operator said the pilot reported getting an unsafe nose gear indication prior to landing, and when he was unable to correct the problem, he landed the airplane with the nose wheel retracted.

During a telephone conversation with the IIC on March 10, the FAA maintenance inspector who examined the airplane said the nose gear up-lock bracket had fractured and distorted, and would not allow the nose gear up-lock to disengage.

An inspection of the nose landing gear up lock actuator bracket (PN 5727110-9) by the IIC revealed that the bracket left side (PN 5713040-14 ) and right side (PN 5713040-15) both had fatigue cracks that propagated from the top of each side to the top of a lightening hole near the center of each side. The lower portion of the bracket had distorted, changing its position relative to the nose wheel up-lock mechanism, which rendered the up-lock unable to disengage.

According to the operator's maintenance records, the operator had complied with the inspection guidelines for the nose gear area set forth in Service Bulletin CA00-10. The airplane was built by Reims Aviation in France, under license of the Cessna Aircraft Corporation. According to the operator, the airplane is no longer supported by Reims Aviation, and according to a Cessna representative, they do not directly support Reims manufactured airplanes, but do have parts available for similar Cessna airplanes.

Aircraft

Registration
N6591R
Reported as
Reims F406
Category
Airplane
Serial number
F406-0054
Airframe hours
8,450
Engine
Pratt & Whitney Canada PT6A-112, 528 horsepower, turbo prop
Damage
Minor damage
Flight
Positioning · Part 91
Registered owner
Gussic Ventures Inc
Airworthiness certificate
Standard, Normal
Last inspection
AAIP · February 1, 2005 · 60 hours before
Departed
SVA · Savoonga, AK
Destination
PAOM · Nome, AK
Flight plan
VFR
Airport
PAOM · Nome, runway 02, 5,576 × 150 ft, asphalt

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
36
Injuries
None
Certificates
Airline transport, Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, Without waivers/limitations
Last flight review
July 1, 2004
Flight hours
4,360 total · 360 in this make and model · 3,560 as pilot in command · 167 in the last 90 days · 57 in the last 30 days · 11 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
20° at 14 knots, gusting 21
Visibility
10 statute miles
Lowest ceiling
None
Temperature
16 °F, dew point 3 °F
Altimeter
29.21 inHg
Observed at
PAOM