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19960721022799A

Accident · Substantial damage
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FAA accident report · Boeing A75N1 · East Troy, WI · July 21, 1996

FAA Aviation Safety Information Portal

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Date
July 21, 1996 · 10:11 local
Place
East Troy, WI
Airport
East Troy Municipal Airport
Phase of flight
Roll-Out (Fixed Wing)
Operating rules
General operating rules (Part 91)
Damage
Substantial damage
Aircraft
N58712
NTSB investigation
NTSBCHI96LA252
Reported as
Boeing A75N1
Reported engine
Continental W670*
People aboard
2
Fatal injuries
0
Pilot’s flight hours
532 total56 in this make and model15 in the last 90 days
N58712Registered now · Boeing A75N1(PT17)S/N 75-341 · Built 1941Airframe modelBoeing A75N1(PT17)Engine modelPratt & Whitney R-985 seriesReciprocating

From the FAA’s Accident/Incident Data System (AIDS), through its Aviation Safety Information Portal, as reported. The NTSB investigates accidents separately, and its record of an accident is the fuller one. The aircraft is matched to the registry 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.

What happened

The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.

(.4)The pilot reported that he flew a 'normal' approach to land on runway 8. During the landing roll, the airplane began to 'drift' to the right. The pilot 'applied the brakes gently' and the airplane nosed over. Examination of the airplane revealed the left rudder horn was fractured. No other evidence of mechanical malfunction was reported. Metallurgical examintion of the rudder horn 'showed no evidence of progressive cracking, such as fatigue. The fracture was typical of an overstress separation. There was thinning of the wall and corrosion pits on the inside surface of the tube... .' Measurements of some of the corrosion pits revealed that the thickness of the .035 inch wall tubing was corroded to a thickness of .008 inches in some areas. 'There was no indication that any of the corrosion pits had penetrated through the tube to the outside surface.' (-23) on July 21, 1996 at approximately 1130 (cdst) Boeing, AN75N1 (stearman) N58712, tipped over during landing rollout on runway 08, East Troy, Wisconsin. The private pilot and one passenger were uninjured. The aircraft sustained minor damage. The aircraft was being operated under 14 CFR part 91 w hen the accident occurred. Visual meteorological conditions prevailed at the time of the accident. Investigation revealed the left rudder horn was broken. Due to damage to the vertical stabilizer and rudder it cannot be determined if this condition existed prior to impact or a result of the impact. A malfunction or defect report, FAA form 8010-4, has been submitted pertinent to the failure.

As the FAA filed it

(.4)THE PILOT REPORTED THAT HE FLEW A 'NORMAL' APPROACH TO LAND ON RUNWAY 8. DURING THE LANDING ROLL, THE AIRPLANE BEGAN TO 'DRIFT' TO THE RIGHT. THE PILOT 'APPLIED THE BRAKES GENTLY' AND THE AIRPLANE NOSED OVER. EXAMINATION OF THE AIRPLANE REVEALED THE LEFT RUDDER HORN WAS FRACTURED. NO OTHER EVIDENCE OF MECHANICAL MALFUNCTION WAS REPORTED. METALLURGICAL EXAMINTION OF THE RUDDER HORN 'SHOWED NO EVIDENCE OF PROGRESSIVE CRACKING, SUCH AS FATIGUE. THE FRACTURE WAS TYPICAL OF AN OVERSTRESS SEPARATION. THERE WAS THINNING OF THE WALL AND CORROSION PITS ON THE INSIDE SURFACE OF THE TUBE... .' MEASUREMENTS OF SOME OF THE CORROSION PITS REVEALED THAT THE THICKNESS OF THE .035 INCH WALL TUBING WAS CORRODED TO A THICKNESS OF .008 INCHES IN SOME AREAS. 'THERE WAS NO INDICATION THAT ANY OF THE CORROSION PITS HAD PENETRATED THROUGH THE TUBE TO THE OUTSIDE SURFACE.' (-23) ON JULY 21, 1996 AT APPROXIMATELY 1130 (CDST) BOEING, AN75N1 (STEARMAN) N58712, TIPPED OVER DURING LANDING ROLLOUT ON RUNWAY 08, EAST TROY, WISCONSIN. THE PRIVATE PILOT AND ONE PASSENGER WERE UNINJURED. THE AIRCRAFT SUSTAINED MINOR DAMAGE. THE AIRCRAFT WAS BEING OPERATED UNDER 14 CFR PART 91 W HEN THE ACCIDENT OCCURRED. VISUAL METEOROLOGICAL CONDITIONS PREVAILED AT THE TIME OF THE ACCIDENT. INVESTIGATION REVEALED THE LEFT RUDDER HORN WAS BROKEN. DUE TO DAMAGE TO THE VERTICAL STABILIZER AND RUDDER IT CANNOT BE DETERMINED IF THIS CONDITION EXISTED PRIOR TO IMPACT OR A RESULT OF THE IMPACT. A MALFUNCTION OR DEFECT REPORT, FAA FORM 8010-4, HAS BEEN SUBMITTED PERTINENT TO THE FAILURE.

NTSB investigation

The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.

NTSB CHI96LA252Accident · No injuriesLimited investigationFinal reportEast Troy, WIcorrosion and fracture of the rudder control horn.Jul 21, 1996 · Substantial damage

Other reports on N58712 · 2

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

Incident 19980727038979IRoll-Out (Fixed Wing) · Oshkosh, WI(-5)On July 27, 1998, at approximately 1100 CDT a Boeing A75N1, N58712 ground looped while landing in a cross wind on runway 18 Oshkosh airport, Oshkosh, Wisconsin. The aircraft was piloted by john j. vorndran. No injuries, minor damage to the aircraft. The…Jul 27, 1998 · Minor damageAccident 19760822023359AFinal Approach · Animas, NMLdg gears torn off. Dust devil or downdraft caused acft to settle during power approach.Aug 22, 1976 · Substantial damage