Pilot Debrief

ZUBAIR S KHAN RAVEN near Mattituck, NY — 2014-07-06

Final reportERA14LA330
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Date
2014-07-06
Location
Mattituck, NY, USA
Aircraft
ZUBAIR S KHAN RAVEN
Registration
N79ZR
Category
Airplane
Highest injury
Fatal
Fatalities
1
Phase of flight
Descent

Probable cause

The pilot's failure to ensure that the airplane was loaded within its calculated center of gravity limits, which resulted in longitudinal instability and a subsequent unrecoverable stall.

NTSB narrative

The airplane departed its home airport for a local flight. Radar data indicated that, about 9 minutes after departure, the airplane was at 7,400 ft mean sea level (msl) and had begun a left 270-degree turn. The last radar return, which was recorded about 1 minute later, showed the airplane about 1,100 ft msl, which correlates to an approximate 6,000 ft-per-minute descent. The airplane was found the following day floating on top of the water in a sound and was subsequently recovered. The pilot's parachute pack was found deployed and partially wrapped around the propeller. The airplane's canopy was not present; however, it was located several weeks later floating in the water. Postaccident examination of the airplane revealed no evidence of any mechanical failure or anomaly that would have precluded normal operation. The airplane's calculated center of gravity (CG) was about 3 inches beyond the aft CG limit, which likely induced longitudinal instability and led to a subsequent deep, unrecoverable stall. The canopy examination and the as-found condition of the parachute pack indicated that the canopy was likely opened in flight. Therefore, the pilot likely recognized that the stall was unrecoverable and attempted to bail out of the airplane but was unsuccessful. Although toxicology testing showed that the pilot had used marijuana at some time before the accident, the low levels detected in the pilot's specimens indicated that he was not likely significantly impaired by its use at the time of the accident.

Analysis

Primary failure mode
Loss of control
First missed decision gate
Pilot could have performed a weight and balance check before takeoff.

NTSB coding

Evidence available

  • ADS-B / radar
  • Photos
  • 12 docket documents
View NTSB final reportView NTSB docket

Docket documents12

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