NTSB Identification: CHI83FA092.
The docket is stored on NTSB microfiche number 22811.
Accident occurred Wednesday, January 26, 1983 in WEST CHICAGO, IL
Aircraft: OBRYON MUSTANG II, registration: N77HJ
Injuries: 1 Uninjured.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

THE HOME BUILT ACFT WAS ON ITS 1ST FLT AFTER BEING CONSTRUCTED. THE TAKEOFF WAS INITIATED ON RWY 33 WITH THE WIND FROM 030 DEG AT 10 KTS. THE PLT REPORTED THAT DURING THE TAKEOFF, THE RIGHT WING LIFTED, BUT THE LEFT WING WOULD NOT COME UP. WHEN CONTROL BECAME DIFFICULT, HE ABORTED THE TAKEOFF; HOWEVER, THE ACFT VEERED OFF THE LEFT SIDE OF THE RWY. THE LEFT WING OF THE ACFT HIT POSTS & WAS DAMAGED. AN INVESTIGATION REVEALED THAT THE TRAILING EDGE OF THE RIGHT WING HAD BEEN 'WASHED DOWN' ABOUT 1 INCH DURING CONSTRUCTION. THIS PROVIDED IT WITH A CONSIDERABLY GREATER ANGLE OF ATTACK.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

WING..INCORRECT

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

MAINTENANCE..INADEQUATE..MANUFACTURER

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

INADEQUATE QUALITY CONTROL..MANUFACTURER


Contributing Factors

WEATHER CONDITION..CROSSWIND




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