LAX00LA009

NTSB accident investigation · Schweizer SGS-2-33A · Waialua, HI · October 14, 1999

Accident · No injuriesLimited investigationFinal report
Date
October 13, 1999, 14:27 local (Oct 14, 1999, 00:27 UTC)
Place
Waialua, HI
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N17914Schweizer SGS-2-33A
Weather
Visual (VMC) · Day
Status
Completed · report May 8, 2001
Report
Approved by Office Director
FAA report
19991013042669A
Case key
47612

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 delay in recognizing the onset of a wind direction change resulting in the downward flow of wind on the leeward side of the mountain (strong sink rate).

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

In flight encounter with weatherClimb - to cruise
Weather condition - unfavorable wind
Weather evaluation - delayedPilot in commandCause
Remedial action - delayedPilot in commandCause
Forced landingDescent
Altitude - low
Precautionary landing - required
On ground/water encounter with terrain/waterLanding - roll
Terrain condition - berm
Terrain condition - ditch

Analysis

The pilot made an off-airport landing due to loss of lift and collided with ground obstructions on the roll out. The pilot stated that no weather facilities are located at the uncontrolled field, other than windsocks that are located at each end, and at midfield. He stated that the preflight weather briefing forecast was for winds from the northeast consistent with the prevailing northeast trade winds. The pilot indicated that he also received local weather information from other glider pilots who had been flying prior to his departure. He said that at 2,000 feet agl he released the glider from the tow plane and began to lose altitude instead of gaining altitude as he expected. He turned to the north, away from a ridge where a strong sink rate had been reported, and proceeded to the practice area. Shortly thereafter, he realized that strong southwesterly winds were creating a strong sink rate condition and he turned toward the airport. When it became apparent that he had insufficient altitude to reach the airport he elected to make an off field landing on a road in an abandoned sugar cane plantation. During the landing rollout the left wing contacted a dirt berm; the glider turned 180 degrees from the initial landing direction and came to rest in a ditch.

Factual narrative

On October 13, 1999, at 1427 hours Hawaiian standard time, a Schweizer SGS-2-33A, N17914, collided with ground obstructions during an off-airport forced landing after encountering an unfavorable wind condition at Waialua, Oahu, Hawaii. The glider, operated under 14 CFR Part 91 as an instructional flight by the Civil Air Patrol, Hawaii Wing, sustained substantial damage. The airline transport pilot was not injured. Visual meteorological conditions existed for the local area flight that had departed from the Dillingham Airfield at 1418. No flight plan was filed.

The pilot holds an airline transport pilot certificate for single and multiengine airplanes, and was undergoing instruction to obtain a glider category add-on to his certificate. He was endorsed for solo privileges in gliders.

Reported winds, obtained from a remote weather observation facility approximately 15 miles away, were from 060 degrees at 8 knots.

The pilot stated that no weather facilities are located at the uncontrolled field, other than windsocks that are located at each end, and at midfield. He stated that the preflight weather briefing forecast was for winds from the northeast consistent with the prevailing northeast trade winds, and runway 8 was in use. The pilot indicated that he also received local weather information from other glider pilots who had been flying prior to his departure.

The pilot said that the takeoff was normal, with turbulence experienced at 500 feet above ground level (agl). During the climb he noted that the winds were from the northeast, and were light and variable. He said that at 2,000 feet agl he released the glider from the tow plane and began to lose altitude instead of gaining altitude. He turned to the north, away from a ridge where a strong sink rate had been reported, and proceeded to the practice area. Shortly thereafter, he realized that strong southwesterly winds were creating a strong sink rate condition and he turned toward the airport.

When it became apparent that he had insufficient altitude to reach the airport he elected to make an off field landing on a road in an abandoned sugar cane plantation. He believed that the surface winds were still from the northeast and landed on a heading of 080. During the landing rollout the left wing contacted a dirt berm; the glider turned 180 degrees from the initial landing direction and came to rest in a ditch.

A Federal Aviation Administration inspector arrived on-scene to inspect the glider an hour later and noted that the winds were from the northwest.

Aircraft

Registration
N17914
Reported as
Schweizer SGS-2-33A
Category
Glider
Serial number
290
Airframe hours
2,731
Engine
unknown
Damage
Substantial damage
Flight
Instructional · Part 91
Operator
Civil Air Patrol Hawaii Wing
Registered owner
Civil Air Patrol, Inc.
Airworthiness certificate
Standard, Normal
Last inspection
Annual · October 22, 1998 · 74 hours before
Departed
HDH

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
62
Certificates
Flight engineer, Flight instructor, Airline transport
Airplane ratings
Single-engine land, Multi-engine land, Multi-engine sea
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Front
Flight hours
11,900 total · 9 in this make and model · 9,228 as pilot in command · 63 in the last 90 days · 22 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
60° at 8 knots
Visibility
7 statute miles
Lowest ceiling
25,000 ft broken
Temperature
86 °F, dew point 63 °F
Altimeter
29.00 inHg
Observed at
HHI, 15 nm away

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.