DEN00LA180

NTSB accident investigation · Grumman American AA-1B · Erie, CO · September 29, 2000

Accident · No injuriesLimited investigationFinal report
Date
September 28, 2000, 18:50 local (Sep 29, 2000, 00:50 UTC)
Place
Erie, CO
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N9622LGrumman American AA-1B
Weather
Visual (VMC) · Day
Status
Completed · report March 2, 2001
Report
Approved by Office Director
FAA report
20000928015139A
Case key
50373

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

Inadequate supervision by the certified flight instructor. Factors were loss of control by the student pilot, the flight instructor's failure to properly monitor the student pilot's rate of descent on final approach, and the flight instructor's lack of recent experience in make and model.

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.

Hard landingLanding - flare/touchdown
Proper descent rate - not maintainedDual studentFactor
Loss of control - on ground/waterLanding - flare/touchdown
Aircraft control - not maintainedDual studentFactor
Supervision - inadequatePilot in command(cfi)Cause
Lack of recent experience in type of aircraftPilot in command(cfi)Factor
On ground/water encounter with terrain/waterLanding - roll
Terrain condition - ditch

Analysis

During a dual instructional flight, the student pilot was practicing touch-and-go landings. The flight instructor gave him a practice engine out approach to landing. During final approach, a high sink rate occurred and the aircraft landed hard, bounced, and came to rest in a ditch beside the runway. Both wings, all the landing gear, and the propeller suffered damage. The student pilot had 27 hours total experience and the flight instructor had 56 hours in make and model, but no experience in make and model in the preceding 90 days. The accident occurred during daylight hours and the weather was winds from the north at 3 knots, clear skies, and a density altitude of 8,200 feet. The landings were being performed to runway 15.

Factual narrative

On September 28, 2000, at 1850 mountain daylight time, a Grumman American AA-1B, N9622L, sustained substantial damage when the aircraft was landed hard and exited the side of the runway on a dual piloted instructional flight. The flight instructor and student pilot were not injured. Visual meteorological conditions prevailed for this local area flight being operated under Title 14 CFR Part 91 and no flight plan was filed. The flight departed at 1730.

According to the student pilot, he had made six touch and go landings and was practicing an engine out landing to runway 15. The aircraft developed a high sink rate on short final and he said, "I landed hard and the aircraft bounced and came to rest in a ditch beside the runway."

Weather at the time was daylight conditions, clear skies, wind from the north at 3 knots and a density altitude of 8,200 feet.

The flight instructor had 56 hours flight experience in the accident aircraft make and model and no time in make and model in the preceding 90 days. The student pilot had 27 hours total flight experience and 15 hours in make and model, all within the preceding 30 days.

All the landing gear, the propeller, and both wings sustained damage.

Aircraft

Registration
N9622L
Reported as
Grumman American AA-1B
Category
Airplane
Serial number
0122
Airframe hours
2,564
Engine
Lycoming O-320-B2B, 160 horsepower, reciprocating
Damage
Substantial damage
Flight
Instructional · Part 91
Registered owner
L. Sherman Butler
Airworthiness certificate
Standard, Normal
Last inspection
Annual · June 26, 2000 · 21 hours before
Departed
48V
Airport
48V · Erie-Tri-County, runway 15, 4,700 × 60 ft, concrete

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
59
Certificates
Commercial, Flight instructor
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Right
Flight hours
2,365 total · 56 in this make and model · 1,872 as pilot in command · 38 in the last 90 days · 14 in the last 30 days · 3 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
0° at 3 knots
Visibility
25 statute miles
Lowest ceiling
None
Temperature
77 °F, dew point 34 °F
Altimeter
30.00 inHg
Observed at
BJC, 15 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.