NONE · Cessna 421A · 2000-07-25 · HOMEWOOD, MS, USA
Event
NTSB number
MIA00LA225
Event ID
20001212X21552
Type
Accident
Date
2000-07-25
Location
HOMEWOOD, MS, USA
Coordinates
32.35012, -89.4692
Injuries
Highest injury
NONE
Fatal
0
Serious
0
Minor
0
Uninjured
6
Total aboard
6
Aircraft
Make
Cessna
Model
421A
Registration
N1477D
FAR Part
091
Engines
2
Damage
SUBS
Conditions
Light
DAYL
Weather
VMC
Probable cause
The inadequate installation of the right propeller by the mechanic for his failure to properly torque the eight nuts resulting in fatigue failure of the studs and separation of the right propeller during cruise flight. Findings in the investigation were 1) the mechanic who installed the right propeller used un-calibrated torque wrenches, and 2) the mechanic who installed the right propeller used an outdated Service Manual.