ANC99LA051

NTSB accident investigation · Britten-Norman BN-2B-21 · Kongiganak, AK · April 19, 1999

Accident · No injuriesLimited investigationFinal report
Date
April 19, 1999, 14:18 local (22:18 UTC)
Place
Kongiganak, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N414JABritten-Norman BN-2B-21
Weather
Visual (VMC) · Day
Status
Completed · report June 23, 2000
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19990419020419A
Case key
46244

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

The deep, water filled hole in the runway.

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.

On ground/water encounter with terrain/waterLanding - roll
Airport facilities,runway/landing area condition - rough/unevenFactor

Analysis

The certificated airline transport pilot reported that prior to landing he did a visual inspection of the runway. He noted that the runway appeared wet in some areas, but within acceptable limits for landing. He said that during the final stages of the landing roll, while moving at a relatively slow ground speed, the airplane's nose wheel encountered a large, water and mud-filled hole. He said that his postaccident inspection revealed that the nose strut had been bent aft, about 20 degrees from its original position. A subsequent inspection of the runway revealed a large, water-filled hole about 15 inches deep, by 1 foot wide, and 20 feet long in the middle of the runway. The pilot noted that there were no preaccident mechanical anomalies with the airplane. A subsequent inspection revealed that the airplane sustained substantial damage to the nose wheel bulkhead.

Factual narrative

On April 19, 1999, about 1418 Alaska daylight time, a wheel equipped Britten-Norman BN-2B-21 airplane, N414JA, received substantial damage while landing at the Kongiganak Airport, Kongiganak, Alaska. The airplane was being operated as a visual flight rules (VFR) nonscheduled cargo flight under Title 14, Part 135, when the accident occurred. The airplane was registered to, and operated by, Larry's Flying Service, Inc., Fairbanks, Alaska. The solo airline transport pilot was not injured. Visual meteorological conditions prevailed, and a VFR company flight plan was in effect. The flight was a continuation of a cross-country flight that originated at the Bethel Airport, Bethel, Alaska, about 1242.

During a telephone conversation with the National Transportation Safety Board investigator-in-charge on April 20, the pilot reported that the accident flight had made a brief stop at two remote villages before departing for the accident airport. He said that prior to landing at Kongiganak, he did a visual inspection of runway 18. He noted that the runway appeared wet in some areas, but within acceptable limits for landing. He said that during the final stages of the landing roll, while moving at a relatively slow ground speed, the airplane's nose wheel encountered a large, water and mud-filled hole. He said that the impact threw water, mud, and stones over the nose, windscreen, engines, and wings. The pilot added that he was able to taxi the airplane to the parking area, to assess the damage. He said that his inspection revealed that the nose strut had been bent aft, about 20 degrees from its original position.

During the pilot's postaccident inspection of runway 18 at Kongiganak, he said he discovered a large hole about 15 inches deep, by 1 foot wide, and 20 feet long in the middle of the runway. After he reported the accident to the flight service station personnel, the runway was closed to all operations until repairs could be accomplished.

The pilot noted that there were no preaccident mechanical anomalies with the airplane.

An FAA ferry permit was issued for a one-time maintenance ferry flight to the operator's main maintenance facility located in Fairbanks, Alaska. A subsequent inspection revealed that the airplane sustained substantial damage to the nose wheel bulkhead.

Aircraft

Registration
N414JA
Reported as
Britten-Norman BN-2B-21
Category
Airplane
Serial number
2107
Airframe hours
8,825
Engine
Lycoming IO-540-K185, 300 horsepower, reciprocating
Damage
Substantial damage
Flight
Part 135
Registered owner
Larry'S Flying Service
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · February 26, 1999 · 78 hours before
Departed
AK85 · Kwigillingok, AK
Flight plan
Company VFR
Airport
DUY · Kongiganak, runway 18, 1,880 × 35 ft, gravel

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
56
Certificates
Commercial, Airline transport, Flight instructor
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
13,000 total · 900 in this make and model · 12,500 as pilot in command · 130 in the last 90 days · 100 in the last 30 days · 3 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
50 statute miles
Lowest ceiling
5,000 ft overcast
Temperature
39 °F

FAA reports on this event · 1

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