DFW06CA107

NTSB accident investigation · Piper PA-22 · Tecumseh, OK · April 17, 2006

Accident · No injuriesData collectionFinal report
Date
April 16, 2006, 20:30 local (Apr 17, 2006, 01:30 UTC)
Place
Tecumseh, OK
Injuries
4 uninjured
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N945APiper PA-22
Weather
Visual (VMC) · Dusk
Status
Completed · report July 31, 2006
Report
Approved by Office Director
Parties
Federal Aviation Adminisration
FAA report
20060416004769A
Case key
63508

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 clearance from the trees. Contributing factors were the pilot's inadequate preflight planning/preparation and the high-density altitude.

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.

In flight collision with objectTakeoff - initial climb
Clearance - not maintainedPilot in commandCause
Weather condition - high density altitudeFactor
Preflight planning/preparation - inadequatePilot in commandFactor
Object - tree(s)

Analysis

The 238-hour private pilot and three passengers attempted to depart the 1,900-foot private grass airstrip in a vintage 125 horsepower single-engine airplane. The pilot reported that he elected to depart the airstrip in a northerly heading to take advantage of the very light headwind; however, he was aware of the tall trees at the departure end of the runway. During the takeoff roll, the pilot added that he extended the flaps to the first notch as the airplane accelerated through 60 mph. The pilot added that he was able to rotate at 60 mph, and the airplane appeared to initiate a climb. Shortly after takeoff, the airplane appeared to have encountered some "sinking air" and the airplane started to settle into the tall trees located near the departure end of the airstrip. The 1951-vintage fabric covered airplane was not equipped with a stall warning indicator. There was no post-crash fire and the pilot and passengers were able to egress the airplane unassisted. The pilot reported that there were no anomalies with the airplane's flight controls or engine. The pilot further reported that he should have "stepped off" the field length and calculated the density altitude on paper instead of figuring it in his head. The weather observation facility located about seven nautical miles southeast from the site of the accident was reporting calm winds. The field elevation at the airport was approximately 1,073 feet and the density altitude was calculated at 3,122 feet. The estimated weight of the airplane at the time of departure was near its maximum takeoff weight of 1,800 pounds.

Factual narrative

The 238-hour private pilot and three passengers attempted to depart the 1,900-foot private grass airstrip in a vintage 125 horsepower single-engine airplane. The pilot reported that he elected to depart the airstrip in a northerly heading to take advantage of the very light headwind; however, he was aware of the tall trees at the departure end of the runway. During the takeoff roll, the pilot added that he extended the flaps to the first notch as the airplane accelerated through 60 mph. The pilot added that he was able to rotate at 60 mph, and the airplane appeared to initiate a climb. Shortly after takeoff, the airplane appeared to have encountered some "sinking air" and the airplane started to settle into the tall trees located near the departure end of the airstrip. The 1951-vintage fabric covered airplane was not equipped with a stall warning indicator. There was no post-crash fire and the pilot and passengers were able to egress the airplane unassisted. The pilot reported that there were no anomalies with the airplane's flight controls or engine. The pilot further reported that he should have "stepped off" the field length and calculated the density altitude on paper instead of figuring it in his head. The weather observation facility located about seven nautical miles southeast from the site of the accident was reporting calm winds. The field elevation at the airport was approximately 1,073 feet and the density altitude was calculated at 3,122 feet. The estimated weight of the airplane at the time of departure was near its maximum takeoff weight of 1,800 pounds.

Aircraft

Registration
N945A
Reported as
Piper PA-22
Category
Airplane
Serial number
22-254
Airframe hours
2,470
Engine
Lycoming O-290-D, 125 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · January 1, 2006
Departed
SNL · Shawnee, OK
Destination
Tecumseh, OK
Airport
PVT · Private Ranch, runway 36, 1,900 × 50 ft, grass/turf

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
50
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, With waivers/limitations
Seat
Left
Flight hours
238 total · 73 in this make and model

Weather

Conditions
Visual (VMC) · Dusk
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
None
Temperature
82 °F, dew point 46 °F
Altimeter
29.70 inHg
Observed at
SNL, 7 nm away

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 N945A · 1

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