SDR UIEA99068

Service difficulty report · Spar Web · Boeing 747230B

Difficulty date
August 31, 1999
Submitted
March 26, 2000
Operation
Air carrier
Aircraft
N509MC
Make and model
Boeing 747230B
Aircraft serial
21221
System (JASC)
5711 · Wing Spar
Part
Spar Web
Part number
65B172461
Condition
Cracked
Location
Ws 382-411
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

RIGHT WING FUEL TANK INTERIOR WS 382 TO WS 411 MID SPAR AFT UPPER WEB SURFACE FOUND CRACK PROPAGATING FROM EXISTING REPAIR. MID SPAR WEB CRACK AT MSS 400 WAS TRIMMED OUT AND A PERMANENT REPAIR INSTALLED. AT MSS 394 A FREEZE PLUG WAS INSTALLED COMMON TO THE WEB AND A HI-LOCK WAS INSTALLED AT THE LOCATION IAW BOEING TELEXS. (M)