# NTSB ERA15LA177: Mooney M20J, N4826H, Allentown, PA, April 6, 2015 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: April 6, 2015, 12:56 local (16:56 UTC) - Place: Allentown, PA - Coordinates: 40.570278, -75.488334 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=40.5703&lon=-75.4883&mi=10 - Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping) - Defining event: [Takeoff: Loss of engine power (total)](https://openairdocs.org/ntsb-events/341) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report October 21, 2015 - Report: Approved by Office Director - NTSB office: Eastern Region Aviation - Parties: FAA/FSDO - NTSB case key (mKey): 90989 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ERA15LA177 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/90989/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=90989 - Page: https://openairdocs.org/ntsb/ERA15LA177 ## Probable cause A total loss of engine power during takeoff due to an interruption of fuel flow to the engine. The reason for the interruption of the fuel flow could not be determined during postaccident examination and testing. ## 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: [Mooney M20J, 12 cases](https://openairdocs.org/ntsb-findings/05000000/cases.md?model=5870219), [All aircraft, 2,247 cases](https://openairdocs.org/ntsb-findings/05000000/cases.md) - [Fluids: fuel](https://openairdocs.org/ntsb-findings/01071010): Aircraft › Fluids/misc hardware · Not specified (probable cause); cases with it: [Mooney M20J, 9 cases](https://openairdocs.org/ntsb-findings/01071010/cases.md?model=5870219), [All aircraft, 1,695 cases](https://openairdocs.org/ntsb-findings/01071010/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Takeoff: Loss of engine power (total)](https://openairdocs.org/ntsb-events/341) (defining event); cases with it: [Mooney M20J, 13 cases](https://openairdocs.org/ntsb-events/341/sequence.md?model=5870219), [All aircraft, 3,820 cases](https://openairdocs.org/ntsb-events/341/sequence.md) - [Emergency descent: Off-field or emergency landing](https://openairdocs.org/ntsb-events/440); cases with it: [Mooney M20J, 8 cases](https://openairdocs.org/ntsb-events/440/sequence.md?model=5870219), [All aircraft, 3,365 cases](https://openairdocs.org/ntsb-events/440/sequence.md) - [Landing-landing roll: Landing area overshoot](https://openairdocs.org/ntsb-events/380); cases with it: [Mooney M20J, 3 cases](https://openairdocs.org/ntsb-events/380/sequence.md?model=5870219), [All aircraft, 400 cases](https://openairdocs.org/ntsb-events/380/sequence.md) ## Analysis The pilot stated that he departed with about 25 gallons of fuel in the left wing fuel tank and about 7 or 8 gallons in the right wing fuel tank and with the fuel selector positioned to the left wing fuel tank. After departure, he flew the airplane to a local airport to practice takeoffs and landings. During the fourth takeoff, about 30 minutes into the flight, and when the airplane was about 400 to 500 ft above the runway, the engine suddenly stopped producing power. The pilot made a forced landing straight ahead, and the airplane struck a fence. Postaccident examination revealed no mechanical anomalies that would have precluded normal engine operation. Examination of the airplane revealed that the left and right wings were damaged, but no fuel was observed leaking from the airplane. About 4 to 5 gallons of fuel was found in the right tank, and about 8 to 12 gallons of fuel was found in the left tank; the fuel found in the tanks was higher than the unusable fuel limit for each tank. The fuel line from the engine-driven fuel pump to the fuel servo was disassembled, and there was no fuel in the line. The fuel line from the boost pump to the engine-driven fuel pump was disconnected, and, when the boost pump was turned, fuel came out in a pulsating spray, which indicates that air was in the line. Based on the evidence, it is likely that there was an interruption of fuel flow to the engine, which resulted in the loss of power; however, the reason for the interruption of the fuel flow could not be determined. ## Factual narrative On April 6, 2015, at 1256 eastern daylight time, N4826H, a Mooney M20J airplane, was substantially damaged during a forced landing after a total loss of engine power shortly after takeoff from the Allentown Queen City Municipal Airport (XLL), Allentown, Pennsylvania. The commercial pilot and the passenger were not injured. The airplane was registered to and operated by a private individual. No flight plan was filed for the flight that originated at the Lehigh Valley International Airport (ABE), Allentown, Pennsylvania, about 1230. Visual meteorological conditions prevailed for the personal flight conducted under 14 Code of Federal Regulations Part 91. According to the pilot, he conducted a preflight inspection of the airplane, which included visually checking the total amount of fuel in each fuel tank. He stated there was about 25 gallons of fuel in the left-wing fuel tank and about 7 or 8 gallons in the right-wing fuel tank. The pilot said the engine started normally and he taxied to the runway where he performed an engine run-up. The engine run up was normal and he confirmed the fuel selector was on the left-wing fuel tank. The pilot said he then departed and flew to XLL for the purpose of practicing takeoffs and landings. On the fourth takeoff, about 30 minutes into the flight, when the airplane reached an altitude about 400 to 500-feet-above the runway, the "engine quit." The pilot described the loss of power as an "instantaneous stop with no warning or sputtering." He then made a forced landing straight ahead and the airplane struck a wire-mesh fence that was supported with steel poles. An initial postaccident examination of the airplane was conducted by the Federal Aviation Administration (FAA) about 30 minutes after the accident. According to an inspector, the left and right wings sustained substantial damage and the nose gear had collapsed. The inspector did not see any fuel leaking from the airplane and the fuel selector was in the "off" position. The throttle/propeller/fuel-mixture controls were all in the full forward position. Further examination of the airplane conducted the day after the accident by an FAA maintenance inspector revealed there was about 4-5 gallons of fuel in the right tank and about 8-12 gallons of fuel in the left tank. The inspector disconnected the fuel line from the engine driven fuel pump to the fuel servo and there was no fuel in the line. He then disconnected the fuel line that runs from the boost pump to the engine driven fuel pump and when the boost pump was turned on, fuel came out in a pulsating spray indicative of air in the line. The airplane was equipped with two fuel tanks in each wing for a total capacity of 64 gallons, of which 61 gallons were usable. No mechanical anomalies were noted that would have precluded normal operation of the engine. The pilot held a commercial pilot certificate for airplane single-engine and multi-engine land, and instrument airplane. He reported a total of 3,029 flighthours, of which, 60 hours were in the accident airplane. ## Aircraft - Registration: [N4826H](https://openairdocs.org/aircraft/N4826H), registered now, S/N 24-0890, built 1979 (OpenAirDocs) - Reported make and model: MOONEY M20J - Registry model: [Mooney M20J](https://openairdocs.org/model/mooney-m20j) (registry code 5870219) (OpenAirDocs) - Registry engine: [Lycoming I0360 SER A&C](https://openairdocs.org/engine/lycoming-i0360-ser-a-c) (registry code 41511, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 24-0890 - Year built: 1979 - Airframe hours: 2205 - Engines: LYCOMING IO360 SER A&C 200 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: Pro International Inc - Registered owner: Pro International Inc - Airworthiness certificate: Standard, Normal - Last inspection: Annual, May 9, 2014, 13 hours before - Departed: XLL, Allentown, PA - Destination: XLL, Allentown, PA - Airport: XLL, Queen City, runway 25, 3,949 × 75 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 76; injuries: none; commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 3, without waivers/limitations; seat: left; flight hours: 3,029 total, 60 in this make and model, 2,950 as pilot in command, 7 in the last 90 days, 4 in the last 30 days, 0 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 120° at 4 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 64 °F, dew point 32 °F - Altimeter: 30.22 inHg - Observed at: XLL ## 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 20150406004759A](https://openairdocs.org/incident/20150406004759A), Apr 6, 2015: Mooney M20J, Allentown, PA, Substantial damage. On April 6, 2015, at approximately 1300 EDT, ^Mr. William page^ was the pilot in command of N4826H (M20J). ^Mr. Page^ departed the Allentown airport (kabe) for… ## Docket (6 files) The files NTSB released with the investigation on September 24, 2015, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=90989. 13.8 MB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 8.5 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40432127&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.PDF - Record of Conversation - Pilot (item 2, .PDF, 62 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40432128&FileExtension=.PDF&FileName=Record%20of%20Conversation%20-%20Pilot-Master.PDF - Record of Conversation - FAA (item 3, .PDF, 61 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40432131&FileExtension=.PDF&FileName=Record%20of%20Conversation%20-%20FAA-Master.PDF - FAA Inspector Statement (item 4, .PDF, 119 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40432129&FileExtension=.PDF&FileName=FAA%20Inspector%20Statement-Redacted.PDF - Email from FAA Inspector (item 5, .PDF, 75 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40432130&FileExtension=.PDF&FileName=Email%20from%20FAA%20Inspector-Redacted.PDF - Photo 1 - Airplane at Site, (Courtesy of FAA) (item 6, .PDF, 5.0 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40432132&FileExtension=.PDF&FileName=Photo%20%201%20-%20Airplane%20at%20Site,%20(Courtesy%20of%20FAA)-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.