# NTSB ANC99LA051: Britten-Norman BN-2B-21, N414JA, Kongiganak, AK, April 19, 1999 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: April 19, 1999, 14:18 local (22:18 UTC) - Place: Kongiganak, AK - Coordinates: 63.030235, -163.539474 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=63.0302&lon=-163.5395&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report June 23, 2000 - Report: Approved by Office Director - NTSB office: Alaska Regional Office - NTSB case key (mKey): 46244 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC99LA051 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/46244/pdf - Page: https://openairdocs.org/ntsb/ANC99LA051 ## Probable cause The deep, water filled hole in the runway. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - On ground/water encounter with terrain/water, landing - roll - airport facilities,runway/landing area condition - rough/uneven (contributing factor) ## 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 (not matched to a registry record) - Reported make and model: Britten-Norman BN-2B-21 - Category: Airplane - Serial number: 2107 - Airframe hours: 8825 - Engines: 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. - Pilot; age 56; 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 (OpenAirDocs). - [Accident 19990419020419A](https://openairdocs.org/incident/19990419020419A), Apr 19, 1999: Bnorm BN2B21, Kongiganak, AK, Substantial damage. On April 19, 1999, about 1418 Alaska daylight time, a wheel equipped britten-norman BN-2B-21 airplane, N4145A, received substantial damage while landing at the… From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.