# NTSB ANC15LA044: Piper PA-18, N9189D, Wasilla, AK, July 3, 2015 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: July 3, 2015, 13:08 local (21:08 UTC) - Place: Wasilla, AK - Coordinates: 61.502223, -149.594451 - Nearby events: https://openairdocs.org/map.md?lat=61.5022&lon=-149.5945&mi=10 - Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping) - Defining event: [Initial climb: Loss of engine power (partial)](https://openairdocs.org/ntsb-events/342) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report September 14, 2016 - Report: Approved by Office Director - NTSB office: Alaska Regional Office - Parties: FAA - NTSB case key (mKey): 91490 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC15LA044 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/91490/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=91490 - Page: https://openairdocs.org/ntsb/ANC15LA044 ## Probable cause The partial loss of engine power after takeoff for reasons that could not be determined because postaccident examination of the airframe and engine did not reveal any anomalies that would have precluded normal operation. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Not determined](https://openairdocs.org/ntsb-findings/05000000): Not determined › Not determined · Unknown/Not determined (probable cause); cases with it: [Piper PA-18A 150, 6 cases](https://openairdocs.org/ntsb-findings/05000000/cases.md?model=7101837), [All aircraft, 2,247 cases](https://openairdocs.org/ntsb-findings/05000000/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Initial climb: Loss of engine power (partial)](https://openairdocs.org/ntsb-events/342) (defining event); cases with it: [Piper PA-18A 150, 2 cases](https://openairdocs.org/ntsb-events/342/sequence.md?model=7101837), [All aircraft, 1,858 cases](https://openairdocs.org/ntsb-events/342/sequence.md) ## Analysis The private pilot reported that he was conducting test flights around the airport after having a new engine installed on the airplane. During the first flight, he flew around the airport traffic pattern and then landed uneventfully. During the second flight, he noticed that the engine was not running smoothly. He landed the airplane and, after sumping the fuel tanks and performing an engine run-up with the mechanic who had installed the engine, he departed again. Shortly after takeoff, the airplane began sputtering and lost all power. The pilot switched fuel tanks in an attempt to restart the engine without success and then executed a forced landing, during which the airplane was substantially damaged. A postaccident examination of the airframe and engine revealed no evidence of any preimpact anomalies that would have precluded normal operation. ## Factual narrative On July 3, 2015, about 1308 Alaska daylight time, a Piper PA-18 airplane, N9189D, sustained substantial damage during a collision with terrain, following a loss of engine power during takeoff from Tidewater Airport near Wasilla, Alaska. The airplane was registered to, and operated by, the pilot as a visual flight rules (VFR) personal flight under the provisions of 14 Code of Federal Regulations Part 91. The pilot, who was the sole occupant, was not injured. Visual meteorological conditions prevailed, and no flight plan was filed for the local area flight. According to the pilot, he was conducting test flights after having a rebuilt Lycoming O-320 engine installed, and completing an annual inspection. The first flight of the day he flew around the airport traffic pattern one time and landed uneventfully. During the second flight, he stated that the engine was showing signs of possible water contamination in the fuel. He landed and sumped the fuel tanks, which showed no indication of water in the fuel. Along with his mechanic, he did an engine run up, checking the magneto drop and carburetor heat application, and the engine ran smoothly. The pilot said that during the third takeoff, as the airplane climbed to about 300 to 500 feet above the ground (agl), the engine began sputtering and lost all power. The pilot stated that he switched fuel tanks, but was unable to restart the engine. During the subsequent forced landing, the airplane went through trees, coming to rest on its right side. The airplane sustained substantial damage to the wings and fuselage. On June 21, 2015, the NTSB IIC, along with another NTSB investigator performed a post-accident examination of the airframe and engine. Control cable continuity was established from the cockpit control to the engine for the throttle, mixture, and carburetor heat. The engine was manually rotated and continuity was confirmed throughout the drive train; thumb compression was obtained on all cylinders. All four cylinders were visually inspected by a lighted boroscope; the combustion chambers were free of foreign object damage, detonation and oil residue. The fuel strainer filter screen was free of visible contaminates. No anomalies, contamination, or evidence of malfunction was found in any of the engine accessories. The cylinders, pistons, valve train, crankshaft, and other internal components were all without evidence of anomaly or malfunction that would have precluded normal operation. After repeated attempts, the pilot did not submit an NTSB Pilot/Operator Aircraft Accident Report (NTSB Form 6120. 1). ## Aircraft - Registration: [N9189D](https://openairdocs.org/aircraft/N9189D), registered now, S/N 186528 (OpenAirDocs) - Reported make and model: PIPER PA-18 - Registry model: [Piper PA-18A 150](https://openairdocs.org/model/piper-pa-18a-150) (registry code 7101837) (OpenAirDocs) - Category: Airplane - Serial number: 186528 - Engines: Lycoming O320 reciprocating - Damage: Substantial damage - Flight: Flight test, Part 91 - Airworthiness certificate: Standard, Normal - Departed: 77AK, Wasilla, AK - Destination: 77AK, Wasilla, AK - Airport: 77AK, Tidewater Airport ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 44; injuries: none; private; airplane ratings: single-engine land; medical: class 3; seat: front ## Weather - Conditions: Visual (VMC), Day - Wind: 250° at 4 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 68 °F, dew point 48 °F - Altimeter: 30.14 inHg - Observed at: PAWS ## 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 20150703011439A](https://openairdocs.org/incident/20150703011439A), Jul 3, 2015: Piper PA-18A 150, Wasilla, AK, Substantial damage. Overhauled engine was installed and pilot was making break-in flights. Took off and remained in pattern, landed and performed leak checks, etc. Took off and… ## Docket (1 files) The files NTSB released with the investigation on July 15, 2016, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=91490. 53 KB in all. - Pilot's Statement (item 1, .PDF, 53 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40442362&FileExtension=.PDF&FileName=Pilot%27s%20Statement-Master.PDF 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.