No fatalities

11 May 2008: A. Schleicher GMBH & Co. ASW 27-18 — Ted C. Wagner — Peoria, AZ

Peoria, AZ, United States

On 11 May 2008, an A. Schleicher GMBH & Co. ASW 27-18 operated by Ted C. Wagner was involved in an aviation accident near Peoria, AZ. No fatalities were reported. Investigators recorded the probable cause as: The pilot's misjudged distance and altitude while on final approach to land. A factor contributing to the accident was a downdraft. This summary draws on records from NTSB.

SourcesNTSBPrimary reportUpdated 1778583330Data APIEditorial standards

A glider pilot experienced a sudden heavy downdraft on short final, causing a loss of indicated airspeed. Despite corrective actions, the glider landed short, sustaining structural damage.

Accident Overview

A glider pilot concluded a cross-country flight by entering a normal left-hand traffic pattern for runway 23R at the intended destination. The pilot observed wind conditions on the downwind and base legs, reporting the wind from 190 degrees at 10 knots. The initial approach to the runway proceeded normally.

Encounter with Downdraft

On short final approach, the pilot unexpectedly encountered a "very heavy downward sink, accompanied by a sharp drop in IAS [indicated air speed]." In response, the pilot retracted the wing spoilers and adjusted the glider's pitch to maintain the requisite approach speed. However, the downdraft continued, and despite the glider's performance capabilities, the pilot was unable to glide to the runway.

Evasive Maneuver and Landing

The pilot turned to avoid a set of power lines, and during the maneuver, a wing contacted the ground. The glider touched down hard on flat open terrain several hundred yards short of the runway threshold. As the glider came to a stop, the fuselage severed in front of the vertical fin, the horizontal stabilizer broke in half, and the fuselage was deformed.

Subsequent Actions

The pilot's report details the wind conditions, the sudden downdraft, and the corrective actions taken. The aircraft sustained substantial damage. No further information regarding occupants or injuries is provided in the source.

Contributing factors

Causes

Descent/approach/glide path — Not attained/maintained

Other contributing factors

Contributed to outcome