Service difficulty report · Blade · Doug DC982

Difficulty date
November 12, 2007
Submitted
November 15, 2007
Operation
Air carrier
Aircraft
N501AM
Make and model
Doug DC982
Aircraft serial
49188
Aircraft time
65,369 hours, 48,314 cycles
Engine
Pwa JT8D217A
Engine time
53,410 hours, 39,607 cycles
Part
Blade
Part number
815431
Part serial
BBDUAN1508
Condition
Damaged
Location
Lt Compressor
Stage of operation
IN
How discovered
V
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

DURING TRANSIT CHECK, FIVE BLADES WERE DETECTED DAMAGED DUE TO A FOD IN LT ENGINE. (4) BLADES WERE DETECTED WITH NICKS ON BLADES LEADING EDGE AND WERE REWORKED IAW MM 72-33-21 BEING WITHIN LIMITS. ONE BLADE WAS DETECTED WITH DENT WITH DEPTH OF 0.135 INCHES AND 5 INCHES FROM BLADE LEADING EDGE TO BLADE ROOT AND WAS REWORKED IAW MM 72-33-21 PARAGRAPH B-3B, CONDITIONED TO 24 FLIGHT HOURS. A BOROSCOPE INSPECTION TO 6TH AND 7TH STAGE COMPRESSOR WERE PERFORMED IAW MM 72-00-00, PAGE 635, NO DAMAGES WERE FOUND. (2) BLADES SETS OF FAN STAGE WERE REPLACED IAW MM 72-33-21 AND LT ENGINE WAS TESTED IAW 71-00-00, ALL CORRECT.

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