GAA16CA477

NTSB accident investigation · Pacific Aerospace 750XL · Warrenton, VA · September 9, 2016

Accident · No injuriesData collectionFinal report
Date
September 9, 2016, 12:15 local (16:15 UTC)
Place
Warrenton, VA
Injuries
14 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N750SSPacific Aerospace 750XL
Defining event
Takeoff-rejected takeoff: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report January 18, 2017
Report
Approved by Office Director
NTSB office
General Aviation Accidents
Parties
FAA
FAA report
20160909019159A
Case key
93995

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

The pilot's failure to set the wing flaps for takeoff, which resulted in an aerodynamic stall, an aborted takeoff, and a runway overrun.

Findings · 7

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Action: forgotten action/omissionPersonnel issues › Action/decision · PilotPacific Aerospace 750XL: 1 caseAll aircraft: 440 casesProbable cause
Aircraft capability: takeoff distanceAircraft › Aircraft oper/perf/capability · Not attained/maintainedPacific Aerospace 750XL: 1 caseAll aircraft: 67 casesProbable cause
Performance/control parameters: configurationAircraft › Aircraft oper/perf/capability · Incorrect use/operationPacific Aerospace 750XL: 1 caseAll aircraft: 80 casesProbable cause
Performance/control parameters: angle of attackAircraft › Aircraft oper/perf/capability · Capability exceededPacific Aerospace 750XL: 1 caseAll aircraft: 990 casesProbable cause
Object/animal/substance: fence/fence postEnvironmental issues › Physical environment · Contributed to outcomePacific Aerospace 750XL: 1 caseAll aircraft: 313 cases

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

The pilot reported that this was his third skydiving flight of the day and he performed a back taxi on the runway for takeoff. He further reported that as he rotated the airplane for takeoff, he heard a "steady" stall warning horn, the flight controls felt mushy, and the airplane would not climb. The pilot reported that he aborted the takeoff and applied max braking and reverse thrust, but the airplane overran the runway remaining. Subsequently, the landing gear collapsed and the airplane collided with a fence. The left and right wing sustained substantial damage. After the accident, the pilot reported that he observed the wing flaps in the fully retracted position. He reported that the flaps should have been set to 20 degrees for takeoff. The pilot reported that he forgot to set the flaps during the back taxi for takeoff because he was communicating with other airplanes near the airport. The pilot reported that he did not use a physical checklist, but he did run through a checklist mentally. The pilot reported no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation.

Factual narrative

The pilot reported that this was his third skydiving flight of the day and he performed a back taxi on the runway for takeoff. He further reported that as he rotated the airplane for takeoff, he heard a "steady" stall warning horn, the flight controls felt mushy, and the airplane would not climb. The pilot reported that he aborted the takeoff and applied max braking and reverse thrust, but the airplane overran the runway remaining. Subsequently, the landing gear collapsed and the airplane collided with a fence. The left and right wing sustained substantial damage. After the accident, the pilot reported that he observed the wing flaps in the fully retracted position. He reported that the flaps should have been set to 20 degrees for takeoff. The pilot reported that he forgot to set the flaps during the back taxi for takeoff because he was communicating with other airplanes near the airport. The pilot reported that he did not use a physical checklist, but he did run through a checklist mentally. The pilot reported no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation.

Aircraft

Registration
N750SS
Reported as
Pacific Aerospace 750XL (NO SERIES)
Category
Airplane
Serial number
115
Built
2005
Engine
Pratt & Whitney PT6A-34, 750 horsepower, turbo prop
Damage
Substantial damage
Flight
Skydiving · Part 91
Operator
D.C. Skydiving Center
Registered owner
Maxim Aviation LLC
Airworthiness certificate
Standard, Normal
Departed
7VG0 · Warrenton, VA
Destination
7VG0 · Warrenton, VA
Airport
7VG0 · Warrenton Air Park, runway 22, 2,215 × 70 ft, grass/turf
Equipment
Stall warning system, ADS-B, Electronic flight bag or handheld device

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
36
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land
Instrument ratings
Helicopter, Airplane
Medical
Class 1, Without waivers/limitations
Last flight review
November 21, 2014
Seat
Left
Restraint
4-point
Flight hours
1,657 total · 229 in this make and model · 1,017 as pilot in command · 197 in the last 90 days · 80 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
None
Temperature
91 °F, dew point 64 °F
Altimeter
29.97 inHg
Observed at
KHWY, 5 nm away

Docket · 3

The files NTSB released with the investigation on November 4, 2016, on NTSB’s docket system: statements, records, photos and specialists’ reports. 4.5 MB in all.

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.

Other investigations on N750SS · 1

Matched to the same aircraft by N-number and date.