Pilot Debrief

GRUMMAN AMERICAN AVN. CORP. AA-1B near Bedford, PA — 2012-08-22

Final reportERA12CA523
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Date
2012-08-22
Location
Bedford, PA, USA
Airport
HMZ
Aircraft
GRUMMAN AMERICAN AVN. CORP. AA-1B
Registration
N9858L
Category
Airplane
Highest injury
None
Fatalities
0
Phase of flight
Landing

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.

NTSB narrative

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.

Analysis

Primary failure mode
Human factors
First missed decision gate
Pilot should have executed go-around with carburetor heat OFF after first porpoise.

NTSB coding

Evidence available

  • Photos
  • 13 docket documents
View NTSB final reportView NTSB docket

Docket documents13

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