SDR UIEA2011012400123

Service difficulty report · Skin · Boeing 747341

Difficulty date: January 24, 2011
Submitted: February 28, 2011
Operation: Air carrier
Aircraft: N355MC
Make and model: Boeing 747341
Aircraft serial: 23395
Aircraft time: 74,044 hours, 14,432 cycles
System (JASC): 5330 · Fuselage Main, Plate/Skin
Part: Skin
Condition: Cracked
Location: Bs 2184 S39r
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 D-CHECK, BS 2184 FUSELAGE SKIN AT STRINGER 39R, FOUND CRACKED DURING INSPECTION. REPAIRED USING GAUGE 0.071" DOUBLER 10.5 X 7.3". HOLES PICKED UP AND PROTECTED PER SRM 51-30-02. FRAME, WEB, CLIPS AND STIFFERNERS INSTALLED. SKIN REPAIR IS CAT B. PER SRM 53-30-03. PG 2M AND 2D. INSPECTION THRESHOLD STARTS FROM REPAIR INSTALLATION. AT INTERVAL 6000 FLT CYCLES TO DO INTERNAL HIGH FREQUENCY EDDY CURRENT PER NDT PT 6 51-00-00 FIG 4.