Service difficulty report · Blade · Doug DC982

Difficulty date
July 15, 2001
Submitted
November 28, 2001
Operation
Air carrier
Aircraft
N956U
Make and model
Doug DC982
Aircraft serial
49701
Aircraft time
40,421 hours, 20,503 cycles
Engine
Pwa JT8D217A
Engine time
45,915 hours, 23,890 cycles
Part
Blade
Part number
798209
Condition
Fractured
Location
Lt Engine
Stage of operation
CL
How discovered
O
Nature of condition
R
Precautionary procedure
E, A

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

What was found

AT 3500 FEET IN CLIMB HEARD ONE COMPRESSOR STALL FROM THE LT ENGINE THEN ENGINE PARAMETERS ALL DECLINED. COMPLETED ENGINE SHUT DOWN PROCEDURE AND RETURNED TO SJC. FOUND TURBINE DAMAGE AND REPLACED THE ENGINE. FOUND ONE NINTH STAGE COMPRESSOR BLADE HAD FRACTURED IN DOVETAIL ROOT SECTION. TWO OTHER NINTH STAGE BLADES FRACTURED IN AIRFOIL SECTION AND ALSO HAD CRACK INDICATIONS IN ROOT SECTION.

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