Service difficulty report · Turbine Blades · Dorner DO328300

Difficulty date
July 26, 2001
Submitted
August 20, 2001
Operation
Air carrier
Aircraft
N410Z
Make and model
Dorner DO328300
Aircraft serial
3125
Aircraft time
2,982 hours, 3,300 cycles
Engine
Pwa PW306B
Engine time
2,334 hours, 2,568 cycles
Part
Turbine Blades
Part number
30B428501
Condition
Damaged
Location
Engine
Part time
2,334 hours, 2,568 cycles
Stage of operation
IN
How discovered
B
Nature of condition
O
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

ENGINE S/N CD0019 HAD A BURNT HOLE EXPOSING INNER CAVITY AT LEADING EDGE OF ONE BLADE. BORESCOPES ON OTHER ENGINES IN FLEET HAVE REVEALED SINGLE CRACKS AT CENTER OF VARIOUS BLADE TIPS; 2 CRACKS (NON-CONVERGING) AT CENTER OF BLADE TIP; MINOR COATING LOSS AT LEADING EDGE OF ALL TURBINE BLADES. DAMAGE NOTED IS WITHIN LIMITS PER DORNIER 328J JIC TR 72-087. ENGINE S/N`S CD0019 AND CD0022 WERE REMOVED TO BE SENT TO REPAIR FACILITY.