SDR DALA1130026301

Service difficulty report · Skin · Boeing 747451

Difficulty date: April 28, 2011
Submitted: April 29, 2011
Operation: Air carrier
Aircraft: N661US
Make and model: Boeing 747451
Aircraft serial: 23719
Aircraft time: 91,130 hours, 12,118 cycles
System (JASC): 5330 · Fuselage Main, Plate/Skin
Part: Skin
Condition: Cracked
Location: Fuselage
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 WALK AROUND FOUND CRACK ON RT SIDE OF A/C AFT OF STATION 2360, (11 INCH AFT OF STATION 2360) ON STRINGER S-15. REMOVED DAMAGE FABBED REPAIR OUT OF 7075T6.071" AND .063", INSTALLED REPAIR, DEFERRED TO MON, THIS IS A CAT B REPAIR WITH A THRESHOLD OF 15,000 CYCLES AND INSPECTION INTERVALS OF 1,500 CYCLES PER SRM 53-00-01 FIG 201 TABLE IV AND DETAIL II.