Service difficulty report · Sill · Doug DC951

Difficulty date
September 6, 2011
Submitted
September 7, 2011
Operation
Air carrier
Aircraft
N401EA
Make and model
Doug DC951
Aircraft serial
47682
Aircraft time
74,502 hours, 68,906 cycles
Part
Sill
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

LT NR 1 MAIN ENTRY DOOR UPPER SILL WEB CRACK. BS 460. S-17L. L=0.8" PER B747-400 SRM 53-10-15 R1 PERFORMED THE REPAIR. REPEAT DVI OF THE MAIN ENTRY DOOR 1 UPPER MAIN SILL OUTER CHORD, WEB, AND FRAME ATTACH ANGLES FOR CRACK(S) PER PART 2. (WHICHEVER OCCURS LAST): 1. WITH 6000 FLIGHT-CYCLES FROM THE LAST INSP. 2. WITHIN 1500 FLIGHT-CYCLES AFTER THE ORIG ISSUE DATE OF SB. (NOT TO EXCEED): 6000 FLIGHT-CYCLES.

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