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Aviation safety reports, made easier to study

NTSB Reports is an independent research and search tool for public aviation accident and incident records. It brings NTSB aviation reports, structured fields, docket files, extracted figures, photos, videos, and update history into one searchable interface.

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NTSB Report

April 30, 2008 · Cessna 560XL · N590AK

Port Heiden, AK

Overview

Report Status
Final with probable cause
Event Type
Accident
Date
April 30, 2008
Injury Outcomes
No injuries (6 uninjured)
Location
Port Heiden, AK
Aircraft
Cessna 560XL
Tail Number
N590AK
Operator
At&T Alascom Affiliate of At&T Management Service
Injuries
None
Aircraft Damage
Substantial
NTSB Number
ANC08LA059

The flightcrew was landing a twin-engine turbofan airplane on Runway 23, a 5,000-foot long, by 100-foot wide, gravel runway, which required a correction for right crosswind. The captain said that during touchdown he inadvertently applied a small amount of left rudder pedal input to correct for a right crosswind as the nose wheel touched down. The airplane veered sharply to the left and went off the left side of the runway. The left main landing gear collapsed, and the left wing struck the runway. The airplane sustained substantial damage to the left wing and fuselage. The captain reported that there were no preaccident mechanical anomalies with the airplane. At the time of the accident, winds were reported to be 320 degrees, at 12 knots. The captain noted that the accident might have been prevented if the airplane had a nose wheel disconnect option.

NTSB Probable Cause

The flying pilot’s failure to maintain directional control while landing in a crosswind. A factor contributing to the accident was a crosswind.

Full Narrative

On April 30, 2008, about 0945 Alaska daylight time, a Cessna Citation 560XL airplane, N590AK, sustained substantial damage while landing at the Port Heiden Airport, Port Heiden, Alaska. The airplane was being operated by AT&T Alascom, Anchorage, Alaska, as an instrument flight rules (IFR) corporate flight under Title 14, CFR Part 91, when the accident occurred. Of the six people aboard, there were no injuries to the two airline transport certificated pilots, or the four passengers. The flight originated at the Ted Stevens Anchorage International Airport, Anchorage, Alaska, about 0820, and an instrument flight plan had been filed. During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC) on April 30, the captain noted that the purpose of the flight was to transport a crew of telecommunications technicians to Port Heiden. He stated that his approach to runway 23 required a correction for a right crosswind, and that the initial touchdown on the 5,000-foot long by 100-foot wide gravel runway was uneventful. He said that as he lowered the nose of the airplane he continued to apply a small amount of left rudder pedal input to correct for the crosswind as the nose wheel touched down. As soon as the nose wheel touched the runway, the airplane veered sharply to the left, and went off the left side of the runway. The left main landing gear collapsed, and the left wing struck the runway. The airplane sustained substantial damage to the left wing and fuselage. The captain reported that there were no preaccident mechanical anomalies with the airplane. At 0936, an automated weather observing system (AWOS) at Port Heiden was reporting, in part: Wind, 320 degrees at 12 knots; visibility, 10 statute miles; clouds and sky condition, 600 feet few; temperature, 30 degrees F; dew point, 28 degrees F; altimeter, 29.94 inHg. The Cockpit Voice Recorder (CVR) was removed from the airplane and sent to the NTSB vehicle recorder laboratory in Washington, DC. A Safety Board aerospace engineer reviewed the recorded data, and determined that the audio did not offer any additional information that had not already been obtained from the flightcrew. No CVR listening group was convened, and no CVR transcript was prepared. A summary of key events of the accident flight is included in the public docket for this accident. The accident airplane was equipped with a nose wheel-mounted gravel kit. In the recommendation part of his written report, the captain noted that the accident might have been prevented if the Citation XL was outfitted with a nose wheel disconnect option, similar to that on a Citation V. The captain stated, in part: "Without a nose wheel disconnect, slight rudder/aileron deflection moves the nose wheel slightly, as happens when landing with a crosswind. Even small nose wheel deflection is magnified when landing on gravel, causing uncommanded sharp turning forces." The Safety Board released the CVR to the owner on November 18, 2008. No parts or components of the airplane were retained by the Safety Board.

Flight

Event TypeAccident
Event Time09:45 AKDT
Nearest AirportPort Heiden (0nm)
Runway23
Runway Length5000 ft
Runway Width100 ft
Flight Plan FiledIFR
Flight Plan ActivatedYes
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftCessna 560XL
Tail NumberN590AK
Aircraft CategoryAir
DamageSubstantial
OperatorAt&T Alascom Affiliate of At&T Management Service
Operating RulePart 91
Engines2
Engine TypeTurbofan
Engine DetailsP&W Canada · PW545 Series · Turbofan · 3804 | P&W Canada · PW545 Series · Turbofan · 3804
Seats13

People & Injuries

Injury SummaryNo injuries (6 uninjured)
Fatal0
Serious0
Minor0
Uninjured6
Total6
Crew 1Age 45 · Second Class · None
Crew 2Age 59 · First Class · None

Conditions

ConditionsVMC
LightDaylight
Wind320° @ 12 kt
Visibility10 sm
CeilingNone
Temperature / Dew Point30 C / 28 C
Altimeter29.94 inHg
Observation Time12:36
Weather SourceWFAC

Appendix: Source Data