Sunday, February 24, 2019

Sonex, N315AL: Fatal accident occurred February 28, 2017 near Lawrence Municipal Airport (KLWM), Essex County, Massachusetts

Alan Peabody Lavender
 March 15, 1943 - February 28, 2017

As an avid sailor, Al was a lifetime member of the American Yacht Club and sailing remained a big part of his life. He also had a passion for flying and was a member of the Experimental Aircraft Association. He built his own Sonex and received his pilot’s license in 2014. Throughout his life he followed his dreams with a gusto that never subsided. At the heart of everything he did, was his love of family, love of friends, love of community, and needless to say, Love of Life.

The National Transportation Safety Board traveled to the scene of this accident.

Additional Participating Entity: 

Federal Aviation Administration / Flight Standards District Office; Boston, Massachusetts

Aviation Accident Factual Report / National Transportation Safety Board: https://app.ntsb.gov/pdf 


http://registry.faa.gov/315ALN


Aaron McCarter, Investigator In Charge

Location: Methuen, MA
Accident Number: ERA17FA117
Date & Time: 02/28/2017, 1302 EST
Registration: N315AL
Aircraft: VENDER ALAN P SONEX
Aircraft Damage: Substantial
Defining Event: Fire/smoke (non-impact)
Injuries: 1 Fatal
Flight Conducted Under: Part 91: General Aviation - Personal 

On February 28, 2017, about 1302 eastern standard time, an experimental, amateur-built Sonex, N315AL, was substantially damaged when it collided with a building in Methuen, Massachusetts, during final approach for landing at Lawrence Municipal Airport (LWM), Lawrence, Massachusetts. The sport pilot was fatally injured. The airplane was owned by the pilot who was operating it under the provisions of Title 14 Code of Federal Regulations Part 91. Visual meteorological conditions prevailed near the accident site at the time of the accident, and no flight plan was filed for the local personal flight.

An acquaintance of the pilot reported that the pilot had experienced fuel leaks in the cockpit due to a cross-threaded connector. He stated that the pilot spent most of his time doing maintenance inside the cockpit. In an e-mail sent to his Experimental Aviation Association (EAA) chapter on February 25, the pilot reported that the last time he flew the airplane was on October 8, 2016. He had removed and reinstalled the fuel tank twice due to a cross-threaded outlet fitting that was causing a fuel leak at the fuel outlet connection near the fuel shutoff valve in the cockpit. He stated that the issue was fixed and that he would fly the following Tuesday (the day of the accident), during which he would remain in the airport traffic pattern and "do a bunch of touch-and-goes to make sure everything is working correctly."

On the day of the accident, the pilot purchased 12 gallons of fuel about 1245. The pilot then informed the tower controller that he would be remaining in the traffic pattern to practice takeoffs and landings. The controller issued a takeoff clearance and instructed the pilot to make a left closed traffic pattern and to report mid-field downwind. The pilot acknowledged and departed runway 14; he then reported mid-field at an altitude of 1,400 ft above ground level (agl). The pilot was subsequently cleared to land, but he never acknowledged the clearance.

The controller reported that, as the airplane turned onto the final leg of the traffic pattern about 500 ft agl, another airplane was "over the numbers" getting ready to land. He stated that, although spacing did not appear to be an issue, he observed the accident airplane make a shallow s-turn maneuver to the left, then back to the right before it suddenly nosed over in a right turn and disappeared out of view.

Several witnesses on the nearby highway saw the airplane approach from the north, then make a sudden dive before disappearing behind trees. One witness stated that the belly of the airplane was "engulfed in flames." He described the flames as "very bright red" and stated that the airplane looked like a "meteor." He stated that flames also appeared to be behind the propeller, which was turning, and "under where the pilot would sit." Additional witnesses called 911, reporting that they saw a plane go down, that it was "on fire," and that the airplane "burst into flame." 


Al Lavender

Pilot Information

Certificate: Sport Pilot
Age: 73, Male
Airplane Rating(s): Single-engine Land
Seat Occupied: Left
Other Aircraft Rating(s): None
Restraint Used: 3-point
Instrument Rating(s): None
Second Pilot Present: No
Instructor Rating(s): None
Toxicology Performed: Yes
Medical Certification: None None
Last FAA Medical Exam:
Occupational Pilot: No
Last Flight Review or Equivalent: 09/01/2015
Flight Time: 128.5 hours (Total, all aircraft), 28 hours (Total, this make and model), 0 hours (Last 90 days, all aircraft), 0 hours (Last 30 days, all aircraft), 0 hours (Last 24 hours, all aircraft) 

According to Federal Aviation Administration (FAA) airman records, the pilot received his sport pilot certificate on May 21, 2014. Review of his logbook revealed 128.5 total hours of flight experience and 28 hours in the accident airplane make model as of his last logged flight about four months before the accident. The pilot did not hold an FAA medical certificate, nor was he required to as a sport pilot.

Aircraft and Owner/Operator Information

Aircraft Make: LAVENDER ALAN P
Registration: N315AL
Model/Series: SONEX UNDESIGNATED
Aircraft Category: Airplane
Year of Manufacture: 2016
Amateur Built: Yes
Airworthiness Certificate: Experimental Light Sport
Serial Number: 1589
Landing Gear Type: Tailwheel
Seats: 2
Date/Type of Last Inspection: 05/04/2016, Condition
Certified Max Gross Wt.: 1150 lbs
Time Since Last Inspection: 28 Hours
Engines: 1 Reciprocating
Airframe Total Time: 28.4 Hours as of last inspection
Engine Manufacturer: Jabiru
ELT: C91  installed, not activated
Engine Model/Series: 3300L
Registered Owner: On file
Rated Power: 120 hp
Operator: On file
Operating Certificate(s) Held: None 

The pilot/owner purchased the airplane in January 2015 from the manufacturer in kit form. The pilot/owner completed the build and it was issued a special airworthiness certificate for experimental airplane on May 4, 2016. It was a two-seat, single-engine, low-wing, tailwheel-equipped airplane that was equipped with a Jabiru 3300L six cylinder, 120-horsepower reciprocating engine. Airframe maintenance records indicated that the airplane had accumulated 28.4 hours total time as of the last recorded entry on October 8, 2016; on this day, the pilot flew 1.4 hours. The engine logbook had one entry dated May 1, 2016 that reported, "ground run no leaks." No additional engine maintenance was documented.



Meteorological Information and Flight Plan

Conditions at Accident Site: Visual Conditions
Condition of Light: Day
Observation Facility, Elevation: LWM, 140 ft msl
Distance from Accident Site: 1 Nautical Miles
Observation Time: 1754 UTC
Direction from Accident Site: 320°
Lowest Cloud Condition: Scattered / 9000 ft agl
Visibility:  10 Miles
Lowest Ceiling:
Visibility (RVR):
Wind Speed/Gusts: 4 knots /
Turbulence Type Forecast/Actual: None / None
Wind Direction: Variable
Turbulence Severity Forecast/Actual: N/A / N/A
Altimeter Setting: 30.35 inches Hg
Temperature/Dew Point: 13°C / -2°C
Precipitation and Obscuration: No Obscuration; No Precipitation
Departure Point: Methuen, MA (LWM)
Type of Flight Plan Filed: None
Destination: Methuen, MA (LWM)
Type of Clearance: None
Departure Time: 1255 EST
Type of Airspace: Class D

The 1254 automated weather observation at LWM included variable wind at 4 knots, 10 miles visibility, scattered clouds at 9,000 ft, temperature 13°C, dew point -2°C, and an altimeter setting of 30.35 inches of mercury.

Airport Information

Airport: Lawrence Municipal Airport (LWM)
Runway Surface Type: Asphalt
Airport Elevation: 147 ft
Runway Surface Condition: Dry
Runway Used: 14
IFR Approach: None
Runway Length/Width: 3900 ft / 100 ft
VFR Approach/Landing: Traffic Pattern 

LWM was located 2 miles east of Methuen, Massachusetts, at an elevation of 147 ft mean sea level. It was equipped with two runways oriented 05/23 and 14/32. Runway 14/32 was 3,900 ft long and 100 ft wide. The surface was made of asphalt and was in good condition.



Wreckage and Impact Information

Crew Injuries: 1 Fatal
Aircraft Damage: Substantial
Passenger Injuries: N/A
Aircraft Fire: In-Flight
Ground Injuries: N/A
Aircraft Explosion: None
Total Injuries: 1 Fatal
Latitude, Longitude:  42.722778, -71.135833 

All components of the airplane were accounted for at the accident site and there was evidence of both pre- and postimpact fire. The airplane struck the roof of a three-story condominium building located about 1,800 ft from the approach end of runway 14. The airplane was found in the attic and upper bedrooms in a nose-low attitude on a heading about 208°. The empennage partially protruded from the roof. Both wings remained attached to the fuselage at their respective wing roots and were bent aft about 45°. The bedroom where the airplane came to rest caught fire, but was quickly extinguished by the building's fire suppression system. Fire damage was limited to the rooms in the immediate vicinity of the airplane.

The engine separated from the firewall and came to rest upright against a wall about 5 ft forward of the fuselage. The engine exhibited fire damage on the left side. The two-blade fixed P-Tip propeller blades separated about 12 inches from the propeller hub. The 17-gallon polymer fuel tank remained intact and secured behind the firewall and directly forward of the instrument panel. It contained about 7 gallons of 100 low lead aviation fuel. Fuel lines leading from the fuel tank were severed during impact and were leaking when the fire department arrived on scene. The fuel shutoff valve, which was installed at the lower side of the tank above the pilot's feet, was separated and found loose in the wreckage and was heavily fire damaged; its preimpact position could not be determined. The aluminum plumbing between the valve and the gascolator was consumed by fire; however, the fittings remained intact. The firewall-mounted gascolator contained residual fuel that resembled 100 low lead aviation fuel. The filter contained no contaminants and was not damaged.

The throttle body separated from the engine but remained attached by the control cable and was slightly damaged by impact forces. It displayed exterior discoloration and sooting, but no evidence of internal damage. The fuel regulator component remained attached to the throttle body; however, the fuel line into the regulator from the fuel supply had no torque and was easily spun by hand where it was threaded into the regulator. The throttle body was opened and displayed some discoloration that appeared like soot inside the air intake. The fuel regulator showed some soot deposits. Both intake and outflow lines and their respective connection nuts and couplers were undamaged at the unit and did not show any signs of heat damage, but areas under and to the left of the unit showed evidence of fire.

The spark plugs were removed; the electrodes exhibited normal wear and color when compared to a Champion inspection chart. Examination of the magnetos revealed no anomalies. The engine crankshaft was turned manually; internal engine continuity was confirmed. Compression and suction were observed on all cylinders and valve action was correct.

Flight control continuity was confirmed by operating the push/pull rods to their respective locations on each flight control surface. All connections remained intact. The aileron connections were traced visually to the dual stick flight controls but could not be operated due to impact damage. Rudder control continuity was visually confirmed, but the controls could not be operated due to impact damage.

The engine sustained fire and heat damage, with the heaviest concentration of heat damage to the lower left side of the engine. Thermal damage propagated aft past the intake and exhaust manifolds through the rear of the engine. The oil filter was fused to the engine and could not be removed. The lower oil line that connected to the oil filter was not secured. The blue aluminum connection nut was loose. There was oil spray on the lower left side of the engine. The leading edge of the intact manifold expansion gaskets were heavily damaged by fire. All intake and exhaust manifolds on the left side of the engine showed evidence of external heat signatures. There was no evidence of heat damage to the right side of the engine. The engine cowl showed interior heat damage to the bottom side with the heaviest concentrations on the bottom left and aft.

Soot, discoloration, and heat signatures were on the bottom of the fuselage and on the leading edge of the radio antennae, which exhibited blistering. Soot was also on the inboard portion of the right wing, and a soot pattern was along the right side of the fuselage that originated from an area near the front of the airplane and extended out under the right wing toward the tail.

The instrument panel was impact- and heat-damaged. It contained an Xtreme-EFIS that can display primary flight display information, navigation information, and, optionally, engine information. The unit could not be separated from the instrument panel in the field, so the entire instrument panel was removed from the wreckage and sent to the NTSB Vehicle Recorder Division for additional examination and download. The SD card was successfully read using the manufacturer's software. Only one file, from February 5, 2016, was recovered, and this file was consistent with ground-only operation. No data pertinent to the investigation was recovered.

Medical And Pathological Information

The Commonwealth of Massachusetts Office of the Chief Medical Examiner, Boston, Massachusetts, performed an autopsy of the pilot. The cause of death was multiple blunt force and thermal injuries.

Severe coronary artery disease with a previously placed stent was found in the left anterior descending coronary artery. In the area of the stent, there was 90% stenosis, and in the more distal portion of the artery, there was 80% stenosis. In the circumflex artery, there was 80% stenosis in the area of a previous stent and 40% focal narrowing elsewhere. The right coronary artery had up to 40% stenosis from atherosclerosis. There was no gross evidence of a previous heart attack, but microscopy demonstrated interstitial fibrosis, hypertrophic cardiomyocytes, and hypertensive changes of the vasculature.

The FAA's Bioaeronautical Sciences Research Laboratory, Oklahoma City, Oklahoma, performed toxicology testing on specimens of the pilot. Testing identified rosuvastatin in blood and urine. Rosuvastatin is a cholesterol lowering medication often marketed with the name Crestor and is not considered impairing.



Aaron McCarter, Investigator In Charge



Methuen Police Captain Randy Haggar spoke to the press.





















Aaron McCarter, Investigator In Charge

NTSB Identification: ERA17FA117
14 CFR Part 91: General Aviation
Accident occurred Tuesday, February 28, 2017 in Methuen, MA
Aircraft: LAVENDER ALAN P SONEX, registration: N315AL
Injuries: 1 Fatal.

This is preliminary information, subject to change, and may contain errors. Any errors in this report will be corrected when the final report has been completed. NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.


On February 28, 2017, about 1302 eastern standard time, an experimental-amateur-built Sonex, N315AL, collided with a building in Methuen, Massachusetts, while on approach for landing at Lawrence Municipal Airport (LWM), Lawrence, Massachusetts. The sport pilot/owner/operator was fatally injured. Visual meteorological conditions prevailed and no flight plan was filed for the local, personal flight that was conducted under the provisions of 14 Code of Federal Regulations Part 91.


The pilot purchased 12 gallons of fuel about 1245 and departed in the airplane from runway 14, about 10 minutes later. The pilot informed the LWM air traffic control (ATC) tower that he would be remaining in the traffic pattern to practice takeoffs and landings. The pilot was subsequently cleared to make a "left-closed" traffic pattern and to report "mid-field downwind." The pilot acknowledged and reported the airplane's position when he was mid-field at an altitude of 1,400 feet above ground level (agl).


At 1302, the airplane was cleared to land, but the pilot never acknowledged the clearance. According to LWM ATC tower personnel, immediately after turning left onto the final approach leg of the traffic pattern the airplane, which was about 500 feet agl made a shallow s-turn maneuver to the left, then back to the right before it suddenly nosed over in a right turn and disappeared out of view.


Several witnesses driving on the nearby highway saw the airplane approach from the north, then make a sudden nose down "dive" before disappearing behind trees. Additional witnesses reported that they saw the belly of the airplane "engulfed in flames" and described the flames as "very bright red." In addition, one witness reported that fire was coming out near the propeller as the airplane descended.


Initial examination of the wreckage revealed that the airplane struck the roof of the three story condominium complex located approximately 1,600 feet from the approach end of runway 14. The airplane entered the attic and upper bedrooms of a residence in a nose-low attitude with the empennage partially protruding from the roof. Both wings remained attached and were bent aft approximately 45°. The engine separated and was found upright, 5 feet forward and to the left of the fuselage. It exhibited fire damage on its left side. The two-blade fixed P-Tip wood propeller blades separated 12 inches outboard from the propeller hub. The 17 gallon fuel tank was intact and mounted in its normal position aft of the firewall. It contained approximately 7 gallons of fuel. Fuel lines leading from the fuel tank were severed during the collision and were leaking when the fire department arrived on scene. The buildings fire suppression system activated.


The two-seat, single-engine, low-wing, tailwheel airplane was issued a special airworthiness certificate in the experimental category on May 4, 2016. It was equipped with a Jabiru 3300L, six cylinder 120 horsepower reciprocating engine.


According to pilot logbook records, the pilot received his sport pilot certificate on May 21, 2014. He had logged a total of 28.4 hours as of October 8, 2016. Various maintenance was performed on the airplane during the months prior to the accident flight. In an email 2 days prior to the accident, the pilot reported that he completed maintenance and started the airplane with no issues, but elected not to fly because of the winds.


The weather conditions reported at LWM, at 1254, included: wind variable at 4 knots, 10 statute miles visibility, scattered clouds at 9,000 feet, temperature 13° C, dew point -2° C, and an altimeter setting of 30.35 inches of mercury.


The airplane was recovered and retained for further examination.

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