ERA12CA523

NTSB accident investigation · Grumman American Avn. AA-1B · Bedford, PA · August 22, 2012

Accident · No injuriesData collectionFinal report
Date
August 22, 2012, 12:50 local (16:50 UTC)
Place
Bedford, PA
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N9858LGrumman American Avn. AA-1B
Defining event
Initial climb: Loss of control in flight
Weather
Visual (VMC) · Day
Status
Completed · report February 14, 2013
Report
Approved by Office Director
NTSB office
Eastern Region Aviation
Parties
FAA/FSDO
FAA report
20120822019499A
Case key
84777

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 the landing and subsequent go-around. Contributing to the accident was the pilot's failure to shutoff the carburetor heat during the attempted go-around and the weight at which the airplane was being operated.

Findings · 4

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: landing flareAircraft › Aircraft oper/perf/capability · Incorrect use/operationGrumman American Avn. AA-1B: 1 caseAll aircraft: 1,285 casesProbable cause
Aircraft capability: maximum weightAircraft › Aircraft oper/perf/capability · Not specifiedGrumman American Avn. AA-1B: 1 caseAll aircraft: 152 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 pilot stated that the airplane began to porpoise after landing. When his efforts to correct the porpoise and continue the landing were not successful, the pilot decided to go around. During the attempted go-around, the pilot did not believe that he was going to clear some trees and decided to land the airplane in a field. The nose and right main landing gear collapsed after touchdown, resulting in substantial damage to the fuselage and both wings. The pilot stated that there were no preaccident mechanical issues and that the engine was producing full power. However, he added that the airplane’s engine only produced 100 horsepower and that he did not feel as though he was gaining enough altitude and was “behind the airplane” during the go-around. Examination of the airplane revealed that carburetor heat control was "ON," the throttle was in the full open position, and the mixture control was in the full rich position. Review of the airplane's owner's manual revealed that the pilot should immediately apply full power and turn the carburetor heat off during a go-around. Further review of the owner's manual indicated that, based on the airplane’s basic empty weight, the weights of the occupants, and the fuel on board, the airplane was operating at or near its published maximum gross weight during the accident.

Factual narrative

While landing the pilot touched down and the airplane began to porpoise. The pilot then added power and attempted to land again. The airplane once again touched down and began to porpoise. This time the pilot decided to do a go-around. During the go-around he did not feel he was going to clear some trees and decided to put the airplane down in a field. Upon touching down in the field, the nose landing gear and right main landing gear collapsed. The left wing, right wing, and fuselage incurred substantial damage. The pilot stated that there were no mechanical issues and the engine was producing full power but, the airplane only had about a hundred horsepower and he did not feel as though he was gaining enough altitude. He also stated that he was “behind” the airplane during the go-around. Examination of the airport and accident site revealed that during the go-around, the airplane had made ground contact off the right side of the runway, became airborne again, flew over the top of a fence, and then touched down in the field. Examination of the airplane revealed that carburetor heat control was "ON". The push-pull type throttle was in the full open position, and the mixture control was in the full rich position. Review of the airplane's owner's manual revealed that if a porpoise was encountered during landing, a go-around should be executed by applying full power immediately and shutting "OFF" the carburetor heat. Further review of the owner's manual, along with the weight of the occupants, and the fuel on-board, revealed that during the occurrence, the airplane was being operated close to its published maximum gross weight.

Aircraft

Registration
N9858L
Reported as
Grumman American Avn. AA-1B
Category
Airplane
Serial number
AA1B-0458
Airframe hours
3,940
Engine
Lycoming 0-235-C2C, 108 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · September 29, 2011 · 14 hours before
Departed
FME · Ft. Meade, MD
Destination
HMZ · Bedford, PA
Airport
HMZ · Bedford County Airport, runway 32, 5,005 × 75 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
57
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, With waivers/limitations
Seat
Left
Flight hours
500 total · 20 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
0° at 0 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
75 °F, dew point 61 °F
Altimeter
30.19 inHg
Observed at
AOO, 16 nm away

Docket · 13

The files NTSB released with the investigation on December 27, 2012, on NTSB’s docket system: statements, records, photos and specialists’ reports. 2.0 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.