Primary finding
Probable cause
The jamming of the right main landing gear brake due to an accumulation of a gummy deposit.
Investigator assessment
Analysis narrative
After touchdown, the right main gear brake locked up due to a gummy deposit that would not allow it to release. As the landing roll continued, the aircraft slowly nosed over.
Source record
Factual narrative
On August 28, 1994, approximately 1130 mountain daylight time (MDT), a Boeing A75N1, N73617, nosed over during the landing roll at Caldwell Industrial Airport, Caldwell, Idaho. The commercial pilot and his passenger received minor injuries, and the aircraft sustained substantial damage. The personal pleasure flight, which departed the same location about five minutes earlier, was being operated in visual meteorological conditions at the time of the accident. No flight plan had been filed, and there was no report of an ELT activation. According to the pilot, the right brake locked up during the landing roll, and as the landing roll progressed, the aircraft slowly nosed over on the runway. It was later discovered that there was a gummy deposit on the right brake mechanism which would not allow the brake to release. -