CHI95LA340

NTSB accident investigation · Piper PA-25-235B · Highland, IL · September 24, 1995

Accident · Serious injuriesLimited investigationFinal report
Date
September 24, 1995, 12:40 local (17:40 UTC)
Place
Highland, IL
Injuries
1 serious, 1 uninjured; on the ground: 1 serious
Damage
No damage
Phase of flight
Taxi
Aircraft
N7753ZPiper PA-25-235B
Weather
Visual (VMC) · Day
Status
Completed · report March 6, 1996
Report
Approved by Office Director
FAA report
19950924049439A
Case key
10047

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Probable cause

a communication misunderstanding between the tow pilot and the glider pilot. Factors related to the accident were: the tow rope becoming entangled, excessive taxispeed by the tow pilot, and the unavailability of a dispatcher.

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.

Miscellaneous/otherTaxi
Towing/advertising/external load equipment - entangledFactor
Communications - not understoodPilot in commandCause
Communications - not understoodGround personnelCause
Taxispeed - excessivePilot in commandFactor
Dispatch - unavailableCompany/operator managementFactor

Analysis

There was confusion between the tow pilot and the glider pilots on the plan of who was going to be towed by what tow plane. One glider pilot began retrieving the tow rope using around-the-waist fashion versus using a tow rope hook. There was confusion on the hand signal to stop the airplane between the tow pilot and glider pilot, and instead the tow plane increased taxi speed to about 15 mph. The glider pilot became entangled in the tow rope and was knocked to the ground. The soring association did not have a dispatcher present at the time of the accident.

Factual narrative

On September 24, 1995, at 1240 central daylight time, a Piper PA- 25-235B, N7753Z, registered to Saint Louis Soaring Association, of Glendale, Missouri, was involved in an accident while hooking up a glider. The glider pilot became entangled in the tow line and was knocked to the ground. The airplane sustained no damage. The commercial pilot reported no injuries. The glider pilot received serious injuries. Visual meteorological conditions prevailed for the local flight, no flight plan was filed.

From the tow pilot's written statement, he had just returned back to the setup area with his intention to tow the next glider in line. He said that there were a group of glider pilots and bystanders conducting release checks on the second tow plane/glider. He said he became confused by all the different hand signals by the group of people there, so he decided to taxi forward to clear the setup area and shut down to figure out what they wanted him to do. He noticed a group of people standing around the injured glider pilot lying on the ground.

Witnesses stated they were conducting release checks for a second tow plane and a glider when the first tow plane arrived in the setup area. There was confusion between the tow pilot and the glider pilots on the plan of who was going to be towed by what tow plane. One glider pilot went to retrieve the tow rope without a tow rope hook, and used an around the waist fashion of retrieval. The glider pilot gave the tow pilot the stop hand signal when the tow rope came within 30 feet, but instead the tow pilot increased speed to about 15 MPH. The glider pilot was, "...gesturing to us that he was unsuccessful in communicating to the tow pilot what our plan was and the tow rope from the tow plane was spinning around his waist and then down his legs and pulled his legs out from under him... ." The injured glider pilot received seven broken ribs when his upper body impacted the ground.

On the day of the accident, the Saint Louis Soaring Association did not have a dispatcher present. He would normally coordinate the ground and air scheduling.

Aircraft

Registration
N7753Z
Reported as
Piper PA-25-235B
Category
Airplane
Serial number
25-3936
Airframe hours
4,648
Engine
Lycoming O-540-B2B5, 235 horsepower, reciprocating
Damage
No damage
Flight
Personal · Part 91
Registered owner
St. Louis Soaring Association
Airworthiness certificate
Standard, Normal; Standard, Utility
Last inspection
Annual · August 1, 1995 · 53 hours before
Departed
H07
Airport
H07 · Highland-Winet, runway 36, 2,600 × 75 ft, grass/turf

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
56
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
1,086 total · 204 in this make and model · 880 as pilot in command · 20 in the last 90 days · 11 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
140° at 4 knots
Visibility
15 statute miles
Lowest ceiling
None
Temperature
61 °F, dew point 27 °F
Altimeter
30.00 inHg

FAA reports on this event · 1

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

Other investigations on N7753Z · 4

Matched to the same aircraft by N-number and date.