DFW07LA105

NTSB accident investigation · Aviat A-1A · Farmingdale, NY · May 5, 2007

Accident · Serious injuriesLimited investigationFinal report
Date
May 5, 2007, 08:50 local (12:50 UTC)
Place
Farmingdale, NY
Injuries
1 serious, 1 minor
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N16HYAviat A-1A
Weather
Visual (VMC) · Day
Status
Completed · report July 25, 2007
Report
Approved by Office Director
Parties
FAA/FSDo
FAA report
20070505019459A
Case key
65751

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 maintain control of the airplane during a short-field takeoff, which resulted in an inadvertent stall.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Loss of control - in flightTakeoff - initial climb
Airspeed(vs) - not maintainedPilot in command
Stall - inadvertentPilot in commandCause
In flight collision with terrain/waterDescent - uncontrolled
Terrain condition - runway

Analysis

The airplane stalled during initial takeoff climb as the pilot was performing a simulated short field takeoff. The pilot/owner boarded his passenger, started the airplane, and taxied to a 5,516-foot-long by 150-foot-wide asphalt runway. The pilot elected to perform a short-field takeoff. Once the airplane became airborne, the pilot established a pronounced nose-high attitude as he attempted to establish a climb airspeed of 55 knots. The pilot was under the impression that the stall speed of the airplane was between 47 and 51 knots and the best angle of climb speed (Vx) was between 55 and 60 knots. The pilot added that when the airplane reached an altitude of 100 to 200 feet above the runway, the engine RPM dropped and the airspeed decreased. The airplane stalled and the nose of the airplane dropped toward the ground, impacting the runway. A witness, who was a flight instructor, was standing on the airport ramp near the main terminal building when he saw the airplane takeoff. He said the airplane was in an "extreme nose high attitude" and he never saw the pilot make an attempt to lower the nose. Examination of the airplane revealed that the airplane came to rest upright on the west side of the runway near the 1,020-foot fixed-distance marks on the runway. The initial impact point was a series of four slash marks on the runway surface just prior to where the airplane came to rest. The flaps were found in the zero-degree (fully retracted) position and the elevator trim tab was positioned one-quarter of a turn from neutral towards the nose down position. According to the airplane's Flight Manual, the tab should be set halfway between neutral and full nose-up for a high performance takeoff. In addition, the published stall speed for the airplane with flaps (power on) was 33 miles per hour (mph) (29 knots).

Factual narrative

On May 5, 2007, at 0850 eastern daylight time, a single-engine Aviat A-1A airplane, N16HY, was substantially damaged when it impacted terrain shortly after takeoff from Runway 01 at the Republic Airport (KFRG), near Farmingdale, New York. The commercial pilot was seriously injured and the passenger sustained minor injuries. The airplane was registered to Air Transport Service, LLC, of Wilmington, Delaware, and operated by the pilot. Visual meteorological conditions prevailed and no flight plan was filed for the local flight conducted under 14 Code of Federal Regulations Part 91.

In a written statement, the pilot stated that he requested a short field, "immediate left downwind departure" from air traffic control. While climbing, the engine's manifold pressure and RPM dropped without warning. The engine lost "significant" power, the "nose went down", and he attempted to land on the runway.

In a telephone interview, the pilot stated that prior to the flight he calculated the airplane's weight and balance to be 15 to 20 pounds under gross weight and performed a pre-flight inspection of the airplane. He then boarded his passenger, started the engine and taxied the airplane to Runway 01(a 5,516-foot-long and 150-foot-wide asphalt runway). The pilot reported that everything was operating normally, and he elected to execute a short-field takeoff. Once the airplane became airborne, he pitched the nose-up to establish a climb airspeed of 55 knots. When asked what the stall speed of the airplane was, the pilot replied that it was between 47 and 51 knots and the best angle of climb speed (Vx) was between 55 and 60 knots. He added that when the airplane reached an altitude of about 100 to 200 feet above the runway, the engine RPM dropped and "things happened fast" as the airspeed decreased. The pilot further stated that he got concerned that the airplane would "slide back on its tail since he was out of the performance parameters of the aircraft." Subsequently, the nose of the airplane dropped toward the ground and the airplane impacted the runway. The pilot declared that he made every effort to recover the airplane; however, he did not have enough altitude to fully recover. In addition, he said that there was an initial drop in engine power (he thought maybe due to a magneto dropping off line), but it came back and the engine was operating at the time of impact. He also could not recall if he had retracted the flaps; however, he did say that if he had retracted the flaps it would have "exacerbated" the "situation."

A witness, who was a flight instructor, was standing on the airport ramp near the main terminal building when he saw the airplane takeoff. He reported that the airplane was in an "extreme nose high attitude" and he never saw the pilot make an attempt to lower the nose. When the airplane reached an altitude of 50-75 feet above the runway, the left wing dropped followed by the nose of the airplane and it impacted the ground.

A Federal Aviation Administration (FAA) safety inspector performed an on-scene examination of the airplane. According to the inspector, the airplane came to rest in the upright position on the west side of the runway near the 1,020-foot fixed-distance marks. The initial impact point was a series of four slash marks on the runway surface just prior to where the airplane came to rest. Examination of the airplane revealed that the elevator trim tab was positioned one-quarter of a turn from neutral towards the nose down position. According to the airplane's Flight Manual, the tab should be set halfway between neutral and full nose-up for a high performance takeoff. The flaps were found in the zero-degree (fully retracted) position. In addition, the published stall speed for the airplane with flaps (power on) was 33 miles per hour (mph) (29 knots).

A review of the aircraft logbooks revealed the last annual inspection was completed on April 1, 2006. As per Federal Regulations, the airplane was required to have an annual inspection to be considered airworthy.

The pilot held a commercial pilot certificate for airplane single-engine and multi-engine land, and instrument airplane. He reported having accumulated a total of 1,846 hours, of which, 42 hours were in the same make and model aircraft. His last second class FAA medical was issued on December 1, 2006.

Aircraft

Registration
N16HY
Reported as
Aviat A-1A
Category
Airplane
Serial number
1455
Airframe hours
481.1
Engine
Lycoming 0-360, 180 hp, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Vincent Pacifico
Registered owner
Air Transport Service, LLC
Airworthiness certificate
Standard, Normal
Last inspection
Annual · April 1, 2006
Departed
FRG · Farmingdale, NY
Airport
KFRG · Republic Aiport, runway 01, 5,516 × 150 ft, asphalt

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
52
Injuries
Serious
Certificates
Private, Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, Without waivers/limitations
Last flight review
August 1, 2005
Seat
Front
Flight hours
2 total · 42 in this make and model · 1,796 as pilot in command · 28 in the last 90 days · 11 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
9° at 3 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
63 °F, dew point 39 °F
Altimeter
30.14 inHg
Observed at
FRG

FAA reports on this event · 1

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