# Accident 19980428015339A: Scwzer SGS135, Maricopa, AZ, April 28, 1998

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: April 28, 1998, 13:15 local time
- Place: Maricopa, AZ
- Airport: Estrella Sailport Airport
- Damage: Substantial damage
- Phase of flight: To Init Climb(1st Pwr Reduct)
- Operating rules: General operating rules (Part 91)
- Location: 33.0853° N, 112.1610° W: Placed by OpenAirDocs at ESTRELLA SAILPORT (E68), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=33.0853&lon=-112.1610&mi=10
- Aircraft: N34187, a cancelled registration (https://openairdocs.org/deregistered/N34187-2013-03-07) (OpenAirDocs)
- Registry model: Schweizer SGS 1-35 (registry code 8050148, https://openairdocs.org/model/schweizer-sgs-1-35) (OpenAirDocs)
- Registry engine: NONE (registry code 00000, https://openairdocs.org/engine/none) (OpenAirDocs)
- Reported make and model: SCWZER SGS135
- Fatal injuries: 0
- Pilot flight hours: 1,000 total
- NTSB investigation: [NTSB LAX98LA147](https://openairdocs.org/ntsb/LAX98LA147) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19980428015339A

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

GLIDER PILOT ON TOW BEGAN YAW LEFT AND RIGHT ON TOW. TOWLINE BROKE STRUCK A DITCH SHORT OF RUNWAY. POSSIBLE STROKE.  (.4)ON APRIL 28, 1998, AT 1315 HOURS MOUNTAIN STANDARD TIME, A SCHWEIZER SGS-1-35, N34187, CRASHED AFTER PREMATURE RELEASE OF THE TOW ROPE AND IMPACTED A DITCH.  THE GLIDER SUSTAINED SUBSTANTIAL DAMAGE, AND THE PILOT/OWNER, THE SOLE OCCUPANT, SUFFERED SERIOUS INJURIES.  VISUAL METEOROLOGICAL CONDITIONS PREVAILED FOR THE LOCAL PERSONAL FLIGHT AND NO FLIGHT PLAN WAS FILED.  IN A WRITTEN STATEMENT FROM THE PILOT TOWING THE GLIDER, HE REPORTED THAT THE TAKEOFF AND INITIAL CLIMB WERE NORMAL. ABOUT 450 FEET AGL, THE GLIDER PILOT MOVED OUT OF POSITION TO THE RIGHT, WHICH CAUSED THE TOW PLANE TO YAW HARD TO THE LEFT.  AFTER BRINGING THE GLIDER BACK TO THE NORMAL TOW POSITION, THE GLIDER VEERED RAPIDLY TO THE RIGHT.  THE TOW PLANE YAWED HARD TO THE LEFT AND THE TOWROPE SNAPPED WHILE AT AN ALTITUDE OF APPROXIMATELY 700 FEET AGL.  THE TOW PILOT REPORTED THAT IT IS THEIR USUAL PRACTICE TO RELEASE THE TOWROPE AT 2,000 FEET AGL.  THE TOW PILOT THEN RETURNED TO THE AIRPORT FOR LANDING.  ACCORDING TO FEDERAL AVITION ADMINISTRATION (FAA) INSPECTOR FROM THE SCOTTSDALE, ARIZONA, FLIGHTSTANDARDS DISTRICT OFFICE, WITNESSES REPORTED THAT DURING TAKEOFF THEY SAW THE GLIDER VEER TO THE RIGHT AND SAW THE TOW LINE BREAK. AS THE GLIDER PILOT ATTEMPTED TO RETURN TO THE AIRPORT TO LAND, IT IMPACTED A DITCH THAT RAN BETWEEN THE TWO RUNWAYS. RESCUE WORKERS REPORTED THAT THE PILOT WAS INCOHERENT AND THEY SUSPECTED THAT HE HAD SUFFERED A STROKE.  ONE WITNESS REPORTED THAT THE PILOT HAD MEDICAL PROBLEMS THAT PROHIBITED HIM FROM FLYING MORE THAT 2 HOURS AT A TIME.  THE PILOT DID NOT POSSESS A MEDICAL CERTIFICATE.  FAA REGULATION PART 61.103 STATES THAT A PRIVATE PILOT WITH A GLIDER RATING  HAS ONLY TO "CERTIFY THAT HE HAS NO KNOWN MEDICAL DEFECT THAT MAKES HIM UNABLE TO PILOT A GLIDER OR FREE BALLOON, AS APPROPRIATE."  THE PILOT SPENT APPROXIMATELY 1 MOUNTH IN THE HOSPITAL FOR VARIOUS INJURIES INFLICTED FROM THE ACCIDENT.  HIS WIFE REPORTED THAT HE HAS NO MEMORY OF THE ACCIDENT.  SHE ALSO REPORTED THAT SHE WAS UNABLE TO FIND ANY AIRCRAFT OR PILOT LOGBOOKS.  THE PILOT'S FAMILY SOLD THE GLIDER AND NO FURTHER EXAMINATION WAS POSSIBLE.

## The NTSB's investigation of this event (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB LAX98LA147](https://openairdocs.org/ntsb/LAX98LA147), Apr 28, 1998: Schweizer SGS-1-35 (N34187), Maricopa, AZ, substantial damage. Probable cause: The pilot's loss of control in flight for undetermined reasons.

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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