SDR DALA1100776307

Service difficulty report · Sill · Boeing 747451

Difficulty date: December 20, 2010
Submitted: January 5, 2011
Operation: Air carrier
Aircraft: N667US
Make and model: Boeing 747451
Aircraft serial: 24222
Aircraft time: 89,404 hours, 10,968 cycles
Engine: Pwa PW4056
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Sill
Condition: Cracked
Location: Bs 460 S16r
Stage of operation: IN
How discovered: 9
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

BS 460, STR 16R DOOR CUTOUT UPPER SILL WEB LOWER FACE FOUND CRACKED. REPAIRED IAW ERA 461688-14 AD SECTION I. SECTION II REQUIRES REPEAT INSP IAW SB 747-53A2785, REV 01/ EO5316-01039 AT 12000 ACFT CYCLES AND 6000 CYCLE INTERVALS SECTION III REQUIRES REPEAT INSP IAW SB 747-53A2500, REV 01/ EM 5300-01049 AT 22,000 ACFT CYCLES, THEN AT 3000 CYCLES INTERVALS.