LAX08LA236

NTSB accident investigation · Aero SP Z O O AT-4 LSA · Hemet, CA · July 20, 2008

Accident · No injuriesLimited investigationFinal report
Date
July 20, 2008, 07:45 local (14:45 UTC)
Place
Hemet, CA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N706GBAero SP Z O O AT-4 LSA
Defining event
Landing-flare/touchdown: Hard landing
Weather
Visual (VMC) · Day
Status
Completed · report September 10, 2009
Report
Approved by Office Director
Parties
Federal Aviation Administration
FAA report
20080720841939A
Case key
68492

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 student pilot's improper landing flare and inadequate recovery from a bounced landing.

Findings · 3

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.

Performance/control parameters: descent/approach/glide pathAircraft › Aircraft oper/perf/capability · Not attained/maintainedAero SP Z O O AT-4 LSA: 1 caseAll aircraft: 809 casesProbable cause
Performance/control parameters: landing flareAircraft › Aircraft oper/perf/capability · Incorrect use/operationAero SP Z O O AT-4 LSA: 2 casesAll aircraft: 1,285 casesProbable cause

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 student pilot had performed two landings prior to the accident without incident. The pilot noted that while on final approach for the accident landing there was a stronger than expected headwind and he had to add power to compensate. He then reduced the power to idle in preparation for landing. He leveled the airplane and applied back-pressure on the control stick and waited for the airplane to stall prior to touchdown. He said that at that point, the airplane seemed to "run out of air and dropped," landing hard on the runway. The airplane bounced, and began to porpoise down the runway. On the second bounce, the airplane yawed to the left and, as it impacted the runway again, the nose landing gear collapsed. The airplane skidded to the left of the runway before coming to a stop upright on the side of the runway. The pilot reported that there were no preexisting mechanical problems with the airplane.

Factual narrative

On July 20, 2008, at 0745 Pacific daylight time, a Special - Light Sport Aircraft (S-LSA) Aero SP Z O O AT-4, N706GB, landed hard and porpoised down runway 23, collapsing the nose landing gear, at Hemet-Ryan Airport, Hemet, California. Hemet Flight Center, LLC, operated the airplane under the provisions of 14 Code of Federal Regulations (CFR) Part 91, as an instructional flight. The LSA student, the sole occupant, was not injured. The airplane sustained structural damage to the firewall during the landing. Visual meteorological conditions prevailed for the flight in the traffic pattern, and no flight plan had been filed.

According to the student pilot, he had made two uneventful landings prior to the accident landing. On the accident landing he reduced the power to idle, added 15 degrees of flaps, and noted an airspeed of 60 knots indicated airspeed (KIAS). He stated that he had to increase the engine revolutions per minute (rpm) as the headwind was stronger than he had originally anticipated. However, he reduced the engine rpm's to idle before "descending onto the runway."

The pilot reported an airspeed of 45-40 KIAS, as he leveled the airplane, and eased the control stick back "for a stall." He reported that the airplane seemed to "run out of air and dropped." The airplane bounced twice. On the second bounce, the airplane bounced "unexpectedly high," and turned a few degrees to the left. After the second bounce the airplane had turned slightly and was now at an angle to the runway. As it touched down again, the nose landing gear collapsed and the airplane skidded towards the left of the runway and came to rest upright. The pilot further reported that there were no mechanical problems with the airplane.

Aircraft

Registration
N706GB
Reported as
Aero SP Z O O AT-4 LSA
Category
Airplane
Serial number
AT4-006
Airframe hours
124
Engine
Rotax 912ULS2, 100 horsepower, reciprocating
Damage
Substantial damage
Flight
Instructional · Part 91
Operator
Hemet Flight Center, LLC
Registered owner
Wood Bee Aviation, Inc.
Airworthiness certificate
Special, Special light-sport (Special)
Last inspection
100 hour · July 18, 2008 · 4 hours before
Departed
HMT · Hemet, CA
Destination
HMT · Hemet, CA
Airport
HMT · Hemet-Ryan Airport, runway 23, 4,314 × 100 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
Student pilot
Age
56
Injuries
None
Certificate
Student
Medical
Sport pilot, Without waivers/limitations
Seat
Left
Flight hours
39 total · 10 in this make and model · 11 in the last 90 days

Weather

Conditions
Visual (VMC) · Day
Wind
Variable at 3 knots
Visibility
6 statute miles
Lowest ceiling
1,200 ft broken
Temperature
63 °F, dew point 61 °F
Altimeter
29.95 inHg
Observed at
RIV, 15 nm away

Docket · 7

The files NTSB released with the investigation on July 21, 2009, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.7 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.