Burkhart Grob G103 TWIN ASTIR N429BG
31 January 1987 · Williamson, Georgia, United States · No injuries
Summary
On 31 January 1987 at about 17:25 local time, a Burkhart Grob G103 TWIN ASTIR registered N429BG, operated by Atlanta Soaring Club, was involved in an incident near Williamson, Georgia, United States. One person was on board and nobody was injured. The aircraft was slightly damaged. No probable cause statement is available for this record.
The record
- Date
- at 17:25
- Classification
- Incident
- Location
- Williamson, Georgia, United States
- Nearest airport
- Peach State Gliderport (3GA7)
- Coordinates
- 33.1795, -84.3597
- Aircraft
- Burkhart Grob G103 TWIN ASTIR
- Registration
- N429BG
- Category
- Glider
- Operator
- Atlanta Soaring Club
- Operating rule
- Part 91: General Aviation
- Purpose of flight
- Instructional
- Phase of flight
- Not recorded
- Aircraft damage
- Minor
- Weather
- VMC
- Light
- Day
- NTSB number
- ATL87IA067
People
Nobody was injured.
| On board | Died | Serious | Minor | Uninjured |
|---|---|---|---|---|
| 1 | 0 | 0 | 0 | 1 |
Probable cause
The NTSB has not published a probable cause for this record. No probable cause statement is present in the source data.
Nothing about the cause is stated here that is not in the source record.
Read the full NTSB narrative
AS THE GLIDER PLT WAS APCHG THE ENTRY POINT FOR LANDING, HE CHECKED THE SPOILERS FOR OPERATION. THE SPOILERS EXTENDED, BUT WOULD NOT RETRACT. THERE WAS A SIGNIFICANT INCREASE IN THE SINK RATE & THE PLT REALIZED HE WOULD BE UNABLE TO REACH THE ARPT. SUBSEQUENTLY, HE LANDED THE GLIDER (SAILPLANE) APRX 1/4 MI NORTH OF THE ARPT. AN INVESTIGATION REVEALED THAT ABELLCRANK (PN 103B-4433) IN THE SPOILER CONTROL SYSTEM HAD FAILED AT TWO LOCATIONS ON THE CENTER BEARING HOUSING. A METALLURGICAL EXAM REVEALED THE BELLCRANK HAD FAILED FROM HIGH CYCLE, LOW STRESS FATIGUE. THE FAILURES OCCURRED AT THE EDGE OF FILLET-WELDS IN RELATIVELY SOFT, HEAT AFFECTED ZONES (HAZ). THE BELLCRANK HAD NOT BEEN SUBJECTED TO POST WELD HEAT TREATMENT. TESTS VERIFIED A SIGNIFICANT LOSS OF HARDNESS IN THE HAZ. THE GLIDER HAD A TOTAL FLT TIME OF 318 HRS WHEN THE BELLCRANK FAILED.
Quoted verbatim from the NTSB record.
Other Burkhart Grob G103 accidents
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 8 Jun 1986 | Burkhart Grob G103 | Benton, Tennessee, United States | Mike Reisman | Minor injuries | - |
| 4 Oct 1986 | Burkhart Grob G103 TWIN II | Calistoga, California, United States | Flint A. Nelson | Serious injuries | - |
| 17 Apr 1985 | Burkhart Grob G103 TWIN ASTIR | Hemet, California, United States | Sailplane Enterprises | No injuries | - |
| 7 May 1985 | Burkhart Grob G103 | Williamson, Georgia, United States | - | No injuries | - |
| 2 Jun 1990 | Burkhart Grob G103 | Barre, Massachusetts, United States | New Eng.soaring Assoc., Inc. | Minor injuries | - |
| 26 Sep 1991 | Burkhart Grob G103 | Fremont, California, United States | Sky Soaring | No injuries | - |
Other accidents in this area
| Date | Aircraft | Location | Operator | Outcome | Died |
|---|---|---|---|---|---|
| 30 Apr 1987 | Cessna 310D | Athens, Georgia, United States | Robert Shields | No injuries | - |
| 24 Aug 1987 | Cessna 172M | Marietta, Georgia, United States | U.s. Navy Flying Club | No injuries | - |
| 3 Sep 1987 | Pitts S-1 | Brooks, Georgia, United States | - | Fatal | 1 |
| 25 Aug 1987 | Cessna 172 | Baxley, Georgia, United States | Eugene Youmans | No injuries | - |
| 15 Sep 1987 | Grumman G-164A | Alamo, Georgia, United States | China Hill AG Service | Serious injuries | - |
| 10 Sep 1987 | Luscombe 8E | Cartersville, Georgia, United States | - | No injuries | - |