# NTSB ANC07LA048: Piper PA-31-350, N200AK, Tuluksak, AK, June 13, 2007 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: June 13, 2007, 08:56 local (16:56 UTC) - Place: Tuluksak, AK - Coordinates: 61.096942, -160.969451 - Nearby events: https://openairdocs.org/map.md?lat=61.0969&lon=-160.9695&mi=10 - Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 9 uninjured - Status: Completed, report November 29, 2007 - Report: Approved by Office Director - NTSB office: Alaska Regional Office - Parties: Anchorage FSDO-03 - NTSB case key (mKey): 66126 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC07LA048 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/66126/pdf - Page: https://openairdocs.org/ntsb/ANC07LA048 ## Probable cause The loss of engine power during cruise due to the pilot's failure to refuel the airplane prior to fuel exhaustion. Factors contributing to the accident were the delayed extension of the gear, and the gear being unlocked at touchdown. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of engine power(partial) - nonmechanical, cruise - normal - refueling - not performed, pilot in command (cause) - fluid,fuel - exhaustion (cause) - Gear collapsed, emergency landing - landing gear - unlocked (contributing factor) - gear extension - delayed, pilot in command (contributing factor) - In flight collision with terrain/water, landing - flare/touchdown - terrain condition - runway ## Analysis The airline transport certificated pilot was conducting a visual flight rules, multi-leg cross-country flight under Title 14, CFR Part 135. The pilot reported that during cruise flight the left engine fuel pressure light illuminated, and when he turned on the emergency pump and switched tanks, the light went out. A few minutes later the right engine fuel pressure light illuminated, he turned on the emergency pump and switched tanks, but the light did not extinguish. When the right engine began to surge he shut the engine down, and feathered the propeller. On short final the left engine began to surge, and he put the gear extension handle in the down position, but the gear failed to fully extend and lock prior to touchdown. The airplane sustained damage to the gear attachment points, and wings when the landing gear collapsed during landing. The pilot said that according to his calculations, the airplane had 1.2 hours of fuel onboard for the 30 minute flight. The FAA air safety inspector who witnessed the defueling of the airplane after the accident, reported that approximately 1 cup of fuel was drained from the left main tank, 1 cup from the left outboard tank, 1 gallon from the right main tank, and 2 gallons from the right outboard tank. The pilot operating manual states that the fuel capacity of the airplane is 192 gallons, and that 182 gallons is usable. ## Factual narrative On June 13, 2007, about 0856 Alaska daylight time, a Piper PA-31-350 airplane, N200AK, sustained substantial damage when the airplane landed without the landing gear fully extended at the Tuluksak Airport, Tuluksak, Alaska. The airplane was being operated by Frontier Flying Service Inc., Fairbanks, Alaska, as a visual flight rules (VFR) passenger flight under Title 14, CFR Part 135, when the accident occurred. The commercial certificated pilot and the eight passengers were not injured. Visual meteorological conditions prevailed, and company flight following procedures were in effect. During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC) on June 13, the general manager for the operator said the flight departed Aniak, Alaska, en route to Bethel, Alaska, with an intermediate stop at Kalskag, Alaska. The total distance is about 85 miles. According to the general manager, after departing Kalskag, the pilot noted a low fuel warning light on the enunciator panel. He said shortly thereafter the right engine quit, and after securing the engine, the pilot diverted the flight to Tuluksak, about halfway between Kalskag and Bethel. He said on final approach of the single-engine landing, the pilot lowered the landing gear, but the gear did not have time to fully extend prior to touchdown. He said the landing gear collapsed, damaging the associated airframe attachment structure, and contact with terrain damaged portions of the right wing. In a written statement to the NTSB, the pilot reported that during cruise flight the left engine fuel pressure light illuminated, he turned on the emergency pump and switched tanks, the light went out, and he turned the airplane toward the nearest airport. He wrote that a few minutes later the right engine fuel pressure light illuminated, he turned on the emergency pump and switched tanks, the light did not extinguish, and when the engine began to surge he shut the engine down, and feathered the propeller. He reported that on short final the left engine began to surge, and he put the gear extension handle in the down position, but the gear failed to fully extend and lock prior to touchdown. The pilot indicated that according to his fuel calculations, the airplane should have had 1.2 hours of fuel onboard for the 30 minute flight. An FAA air safety inspector who witnessed the defueling of the airplane after the accident, reported to the NTSB IIC that approximately 1 cup of fuel was drained from the left main tank, 1 cup from the left outboard tank, 1 gallon from the right main tank, and 2 gallons from the right outboard tank. The pilot operating manual states that the fuel capacity of the airplane is 192 gallons, and that 182 gallons is usable. ## Aircraft - Registration: [N200AK](https://openairdocs.org/deregistered/N200AK-2023-01-10), registration cancelled 2023-01-10, S/N 31-8052180, built 1980 (OpenAirDocs) - Reported make and model: Piper PA-31-350 - Registry model: [Piper PA-31-350](https://openairdocs.org/model/piper-pa-31-350) (registry code 7103110) (OpenAirDocs) - Registry engine: [Lycoming TI0-540 series](https://openairdocs.org/engine/lycoming-ti0-540-series) (registry code 41533, turbo-prop) (OpenAirDocs) - Category: Airplane - Serial number: 31-9052180 - Airframe hours: 32615 - Engines: Lycoming LTIO-540-J2BD 350 horsepower reciprocating - Damage: Substantial damage - Flight: Part 135 - Registered owner: Frontier Flying Service Inc - Airworthiness certificate: Standard, Normal - Last inspection: AAIP, June 1, 2007 - Departed: PALG, Kalskag, AK - Destination: PABE, Bethel, AK - Flight plan: Company VFR - Airport: TLT, Tuluksak, runway 20, 2,461 × 30 ft, gravel ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 52; injuries: none; airline transport, flight instructor; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, with waivers/limitations; last flight review March 1, 2007; seat: left; flight hours: 3,791 total, 1,567 in this make and model, 3,775 as pilot in command, 195 in the last 90 days, 68 in the last 30 days, 5 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 190° at 5 knots - Visibility: 10 statute miles - Lowest ceiling: 2,100 ft overcast - Temperature: 45 °F, dew point 39 °F - Altimeter: 30.11 inHg ## 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 20070613012519A](https://openairdocs.org/incident/20070613012519A), Jun 13, 2007: Piper PA31350, Tuluksak, AK, Substantial damage. (-23) Enroute from kalskag to bethel aircraft reported a left engine low fuel pressure light. Pilot turned on emergency fuel pump, switched to outboard tank,… ## Other investigations on N200AK (1) 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. - [NTSB ANC92IA001](https://openairdocs.org/ntsb/ANC92IA001), Oct 2, 1991: Piper PA-31-350 (N200AK), Fairbanks, AK, incident, minor damage. Probable cause: INCORRECT INSTALLATION OF CRANKSHAFT COUNTERWWEIGHT ROLLERS BY THE MANUFACTURER DURING REMANUFACTURE OF THE ENGINE. FACTOR WAS THE INADEQUATE SURVEILLANCE OF THE ENGINE ASSEMBLY PROCESS BY 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.