SDR UIEA201000069

Service difficulty report · Bulkhead · Boeing 747243F

Difficulty date: March 25, 2010
Submitted: March 30, 2010
Operation: Air carrier
Aircraft: N540MC
Make and model: Boeing 747243F
Aircraft serial: 22508
Aircraft time: 106,156 hours, 18,652 cycles
Engine: Ge CF650E2
System (JASC): 5412 · Nacelle/Pylon, Bulkhead/Firewall
Part: Bulkhead
Condition: Cracked
Location: Nr 1 Pylon
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 C-CHECK, CRACKING WAS FOUND IN THE 65B94107-19 NAC STA 270 BULKHEAD UPPER WEB ASSY ON THE NR1 PYLON. THE WEB ASSY WAS REPLACED IAW DWG 65B94107 WITH MINOR DEVIATIONS IAW REA 00664R0002. THIS EO DOCUMENTS THE REPLACEMENT OF THE WEB IAW DWG 65B94107 AND REA MF00664R0002. THE DEVIATIONS TO THE 65B94107-19 WEB INSTALLATION IAW REA MF00664R0002 ARE MINOR AND HAVE BEEN APPROVED BY MFG, RDR DATED 24MAR2010 PROVIDED IN SR 1-1534747177 (FIGURE 5).