CESSNA 152 near Bridgeport, TX — 2016-07-08

Probable cause

The pilot's unstabilized approach and uneven braking due to insufficient runway remaining, which resulted in a loss of directional control during landing. Contributing to the accident was the bound flap jackscrew, which jammed the flaps and led to the pilot’s inability to operate the airplane normally.

NTSB narrative

While performing touch-and-go landings, the private pilot noticed that the ground run was longer than usual and that the airplane had difficultly climbing. He saw that the flaps were still at 30° despite the flap handle being in the "up" position. The pilot then maneuvered to land, but the airplane was higher than normal while approaching the runway. He slipped the airplane down, and the airplane floated down the runway. After the airplane touched down near the end of the runway, the pilot applied the brakes, but he then lost directional control, and the airplane exited the side of the runway. The nosewheel got stuck in the soil, and the airplane nosed over, coming to rest inverted. Examination of the flap assembly revealed that the flap tube assembly on the flap actuator motor was fully extended and bound. The tube assembly was freed mechanically, and the flap actuator motor was then able to move the tube assembly normally. Further examination did not reveal a reason why the tube assembly had become bound. No anomalies were noted with the jackscrew or the flap actuator motor. It is likely that the pilot was confused by the airplane's performance with 30° of flaps while on the approach because it was not what he was used to and that the bound flaps prevented him from getting the airplane to achieve sufficient airspeed for a proper approach and landing, which led to the unstabilized approach and long landing. The pilot's subsequent uneven application of braking resulted in the runway excursion.

Analysis

Primary failure mode

Mechanical failure

First missed decision gate

Pilot could have aborted landing when flaps were not retracting properly.

NTSB coding

• Loss of control on ground · Landing-landing roll

Evidence available

• 2 docket documents

Docket documents2

• Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1form
• Record of Examother

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