IAD99LA030

NTSB accident investigation · WSK PZL Krosno KR-03A · Kutztown, PA · February 10, 1999

Accident · Minor injuriesLimited investigationFinal report
Date
February 10, 1999, 14:15 local (19:15 UTC)
Place
Kutztown, PA
Injuries
1 minor, 1 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N210CWSK PZL Krosno KR-03A
Weather
Visual (VMC) · Day
Status
Completed · report June 23, 2000
Report
Approved by Office Director
FAA report
19990210001269A
Case key
45770

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

was the in-flight encounter with thermal sink over unsuitable terrain for landing.

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 weatherManeuvering
Weather condition - no thermal liftCause
Terrain condition - none suitableCause
Hard landingLanding - flare/touchdown

Analysis

The flight instructor flew the glider earlier in the day and experienced '...a lot of lift...' and expected similar conditions for the dual instructional flight. He and the student were released off tow, encountered lift, and climbed to 4,000 feet. There, the glider experienced almost constant sink, as indicated by the variometer, and an off airport landing to hilly terrain was required. The glider experienced a hard landing on ascending terrain. The flight instructor reported 13,481 hours of flight experience, 380 of which was in gliders.

Factual narrative

On February 10, 1999, at 1415 eastern standard time, a WSK PZL-Krosno KR-03A glider, N210C, was substantially damaged during an off airport landing in Kutztown, Pennsylvania. The certificated flight instructor was not injured. The dual student pilot received minor injuries. Visual meteorological conditions prevailed for the local instructional flight that originated at the Kutztown Airport (N31), approximately 1350. No flight plan was filed for the flight conducted under 14 CFR Part 91.

In a written statement, the flight instructor said:

"...[he] followed the tow to the north where we encountered lift, to approximately 4,000 feet, after releasing from the tow plane which shortly turned to sink. Turned south toward the airport, and the sink rate was still increasing as we shortened the distance between the airport and us. At times we encountered slight lift but to no avail, we'd enter sink again. Altitude getting critically low, turned and landed the aircraft in a field. No injuries to occupants of glider, when the glider was driven to a hard landing on the lee side of the hill. Wings were level and the glider was still flying when we touched down. (Only wish the landing site was level)."

In a telephone interview, the student pilot said:

"Before we left he said we'd be out for a long time because there was a lot of lift. He'd already been out and said there was a lot of lift. We were towed over to the mountains where there was a lot of lift and then the weather seemed to change. It just seemed like all we got was sink. We were watching the variometer and it went from a lift situation to a sink situation. [The instructor] said we might have to look for a field to put it down. He took the flight controls and we searched for a place to put it down but all the landing sites looked lame. Then it seemed like, we were down. There were trees coming up and it didn't look like we were going to clear them. We went to the left [of the trees] and were in a level attitude at ground contact. It wasn't stalling or anything. It came to a sudden stop only because we were going uphill, it wasn't level ground."

When questioned about how the flight was conducted, the student pilot said:

"He's a no-fooling-around guy. He gets up there, he's serious about everything. He's right on the ball, there's never a problem."

The flight instructor reported 13,481 hours of flight experience, of which 380 hours were in gliders.

Weather reported at Reading, Pennsylvania, 10 miles southwest of Kutztown, at 1345 was: scattered clouds at 20, 000 feet with 40 miles of visibility. The winds were from 320 degrees at 12 knots gusting to 19 knots.

Aircraft

Registration
N210C
Reported as
WSK PZL Krosno KR-03A
Category
Glider
Serial number
03-15
Airframe hours
817
Engine
unknown
Damage
Substantial damage
Flight
Instructional · Part 91
Registered owner
Granite Sales Inc
Airworthiness certificate
Standard, Normal
Last inspection
Annual · October 5, 1998 · 90 hours before
Departed
N31
Airport
N31 · Kutztown Airport, runway 35, 2,500 × 50 ft, asphalt

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
55
Certificates
Flight instructor, Airline transport, Commercial
Airplane ratings
Single-engine sea, Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Rear
Flight hours
13,481 total · 61 in this make and model · 11,669 as pilot in command · 82 in the last 90 days · 38 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
320° at 12 knots, gusting 19
Visibility
40 statute miles
Lowest ceiling
None
Temperature
52 °F, dew point 27 °F
Altimeter
30.00 inHg
Observed at
RDG, 10 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.