SDR UIEA99065

Service difficulty report · Doubler · Boeing 747230B

Difficulty date
August 31, 1999
Submitted
March 26, 2000
Operation
Air carrier
Aircraft
N509MC
Make and model
Boeing 747230B
Aircraft serial
21221
Part
Doubler
Part number
302U000015
Condition
Cracked
Location
Nr 1 Pylon
Part time
95,346 hours
Stage of operation
IN
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

NR 1 PYLON CAP SKIN MOD MO 54-0074 AREA FOUND WITH EXISTING DOUBLER, BULKHEAD FRAME CRACK AT STATION 270. THE CRACKED FRAME FLANGE WAS TRIMMED TO REMOVED DAMAGE, NDT PERFORMED TO VERIFY NO OTHER CRACKS. NEW REPAIR ANGLES AND NEW DOUBLER INSTALLED IAW BOEING TELEXS. (M)