SEA98LA147

NTSB accident investigation · Pilgrim Steen Skybolt · Curtis, WA · July 24, 1998

Accident · Minor injuriesLimited investigationFinal report
Date
July 24, 1998, 13:15 local (20:15 UTC)
Place
Curtis, WA
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N21SPPilgrim Steen Skybolt
Weather
Visual (VMC) · Day
Status
Completed · report January 11, 2000
Report
Approved by Office Director
FAA report
19980724024849A
Case key
43577

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

Loss of control for undetermined reasons.

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 flightManeuvering
Reason for occurrence undeterminedCause
In flight collision with terrain/waterDescent - uncontrolled
Terrain condition - roadway/highway

Analysis

The pilot, who owned the airplane and was an experienced aerobatic pilot, stated that he had taken off, accelerated along the runway, then pitched up to about 30 degrees and had climbed out to about 500 feet above ground level. He then pitched over to level to accelerate and initiated a turn to the right, with the intent of climbing out to an aerobatic practice box. He stated that when he pitched over, he felt negative 'G' loading, and the airplane appeared to perform a portion of an outside snap roll, with the right wing dropping and nose going down violently. The airplane then pointed down very steeply about 90 degrees off heading to the right. He stated that an attempt was made to pull out, but the airplane was in a high speed stalled condition, so he pushed the throttle full open and pushed the nose straight down to relieve the stalled condition and again attempted a recovery. This time, the airplane was not stalled and he was able to initiate a pull out. During the recovery attempt, the airplane impacted a road, slightly tail low, and the propeller struck the ground, leaving several prop strikes in the asphalt. The airplane bounced off the road at a 45 degree angle, then impacted a power pole. The pilot noted at the G meter was pegged at +13 G and -5 G. No preexisting mechanical anomalies that could have resulted in loss of control were found by FAA inspectors who inspected the wreckage.

Factual narrative

On July 24, 1998, approximately 1315 Pacific daylight time, a Pilgrim Steen Skybolt, N21SP, was substantially damaged when it collided with terrain when the pilot was unable to maintain control during climbout shortly after takeoff from Chehalis, Washington, for a practice aerobatic flight in the local area. The commercial pilot, the sole occupant, had minor injuries. Visual meteorological conditions prevailed at the time of the accident. There was no report of an ELT actuating.

The pilot, who owned the airplane and was an experienced aerobatic pilot, stated that he had taken off, accelerated along the runway, then pitched up to about 30 degrees and had climbed out to about 500 feet above ground level. He then pitched over to level to accelerate and initiated a turn to the right, with the intent of climbing out to an aerobatic practice box. He stated that when he pitched over, he felt negative "G" loading, and the airplane appeared to perform a portion of an outside snap roll, with the right wing dropping and nose going down violently. The airplane then pointed down very steeply about 90 degrees off heading to the right. He stated that an attempt was made to pull out, but the airplane was in a high speed stalled condition, so he pushed the throttle full open and pushed the nose straight down to relieve the stalled condition and again attempted a recovery. This time, the airplane was not stalled and he was able to initiate a pull out. During the recovery attempt, the airplane impacted a road, slightly tail low, and the propeller struck the ground, leaving several prop strikes in the asphalt. The airplane bounced off the road at a 45 degree angle, then impacted a power pole. The pilot noted that the G meter was pegged at +13 G and -5 G.

No preexisting mechanical anomalies that could have resulted in loss of control were found by FAA inspectors who inspected the wreckage.

Aircraft

Registration
N21SP
Reported as
Pilgrim Steen Skybolt (STEEN SKYB)
Category
Airplane, amateur-built
Serial number
P3
Airframe hours
880
Engine
Lycoming IO-540J4A5, 250 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Cedric J. Zabriskie
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Annual · April 19, 1998 · 22 hours before
Departed
0WA2 · Curtis, WA

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
63
Certificates
Flight instructor, Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Rear
Flight hours
2,307 total · 225 in this make and model · 2,135 as pilot in command · 54 in the last 90 days · 32 in the last 30 days · 6 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
50 statute miles
Lowest ceiling
None
Temperature
81 °F

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 N21SP · 1

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