The crash that killed Jenni Rivera and six others was attributed to a "series of factors" by Mexico's General Civil Aviation Administration.
Investigators hypothesized a problem with the horizontal stabilizer may have caused a sudden loss of control, while ruling out weather or inflight fire.
Contributory factors cited included the pilots' disparate ages (78 and 21) and the aircraft operator's failure to address previously noted issues.
The report could not definitively state the exact cause due to the extensive damage and dispersion of the 43-year-old airplane's debris.
