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NTSB Report

June 12, 1995 · Cessna 402B · N710WS

Tuntutuliak, AK

Overview

Report Status
Final with probable cause
Event Type
Accident
Date
June 12, 1995
Injury Outcomes
No injuries (4 uninjured)
Location
Tuntutuliak, AK
Aircraft
Cessna 402B
Tail Number
N710WS
Injuries
None
Aircraft Damage
Substantial
NTSB Number
ANC95LA077

THE RUNWAY SURFACE HAD BEEN GRADED, AND SOFT GRADED MATERIAL HAD BEEN PUSHED INTO A SMALL DEPRESSION ADJACENT TO THE RUNWAY. THE AIRPLANE WAS TAXIING BACK TO THE RAMP, WHEN THE NOSE WHEEL ROLLED INTO THE DEPRESSION AND THE NOSE GEAR COLLAPSED. THE SOFT AREA/DEPRESSION HAD BEEN PREVIOUSLY MARKED WITH YELLOW CONES. THE CONES HAD BEEN REMOVED WHILE THE RUNWAY WAS BEING GRADED AND HAD NOT BEEN REPLACED. NO NOTAMS HAD BEEN ISSUED. THE ALASKA SUPPLEMENT STATED THAT THE RUNWAY WAS SOFT AND RUNWAY CONDITIONS WERE NOT MONITORED.

NTSB Probable Cause

THE AIRPORT MAINTENANCE PERSONNEL'S INADEQUATE MAINTENANCE OF THE RUNWAY BY NOT REPLACING THE YELLOW CONES THAT MARKED THE SOFT AREA. THE SOFT AREA ON THE RUNWAY WAS A RELATED FACTOR.

Full Narrative

On June 12, 1995, at 1530 Alaska daylight time, a wheel equipped Cessna 402B airplane, N710WS, registered to and operated by the Watchtower Bible Organization and Tract Society, collapsed its nose gear while taxiing back after landing. The business flight, operating under 14 CFR Part 91, departed Good News, Alaska, and the destination was Tuntutuliak, Alaska. No flight plan was filed and visual meteorological conditions prevailed. The airline transport certificated pilot and the three passengers were not injured and the airplane was substantially damaged. According to the Director of the Watchtower Bible Organization, who was also a passenger on the airplane, they were taxiing back to the ramp after landing. The runway had just been graded and a small depression in the runway's surface was filled with soft material. The airplane's nose gear rolled into the depression and the nose gear collapsed. The Director of the Watchtower Bible Organization stated that the soft area on the runway had been marked with yellow cones. He stated that the runway maintenance person told them the cones were removed so the runway surface could be graded. The cones had not been replaced. There were no NOTAMS (Notice to Airmen) issued. The Alaska Supplement, however, states that runway conditions are not monitored and that a visual inspection is recommended. The supplement states that there are dips and ruts to 4 inches deep.

Flight

Event TypeAccident
Event Time15:30 AKDT
Nearest AirportTuntutuliak (0nm)
Runway2
Runway Length1800 ft
Runway Width75 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftCessna 402B
Tail NumberN710WS
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines2
Engine TypeReciprocating
Engine DetailsContinental · TSIO-520 · Reciprocating · 300
Seats5

People & Injuries

Injury SummaryNo injuries (4 uninjured)
Fatal0
Serious0
Minor0
Uninjured4
Total4
Crew 1Age 60 · First Class

Conditions

ConditionsVMC
LightDaylight
Wind310° @ 10 kt
Visibility39 sm
CeilingNone
Temperature / Dew Point55 / 0 C
Altimeter0
Weather SourceWIT

Appendix: Source Data