Service difficulty report · Stiffener · Boeing 73776N

Difficulty date
June 5, 2023
Submitted
July 5, 2023
Operation
Air carrier
Aircraft
N7811F
Make and model
Boeing 73776N
Aircraft serial
28654
Aircraft time
58,393 hours, 34,757 cycles
Part
Stiffener
Part number
UNKNOWN
Condition
Cracked
Location
Zn 300 Stabilize
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

RH HORIZ STAB STA 120.3 RIB HAS CRACK IN 4TH STIFFENER<[01] APPLICABLE REPAIR FOR RH HORIZ STAB STA 120.3 RIB CRACK IN 4TH STIFFENER THAT WILL BE USED IS SRM 55-10-09-2R-5 REPAIR 5.;[02] CUT AND REMOVED CRACK DAMAGE ON VERTICAL STIFFENER AND ON THE LOWER INBOARD CHORD BY THE RADIUS OF VERTICAL STIFFENER; DIMENSIONS L=0.85' X W= 0.65' IA SRM 55-10-09-2R-5 STEP 4.B(1 & 2).;[08] FABRICATED REPAIR PARTS; (1)T-SECTION 7075-T76511; 0.063' THICK LOT # 1476286-1; (2)ANGLE BAC1490 7075-T62; 0.063' THICK LOT #1464923-1 & (3)FILLER 7075-T6; 0.050' THICK LOT #1338195-3 IAW SRM 55-10-09-2R-5 STEP 4.G - K.;[09] APPLIED CHEMICAL CONVERSION COATING TO REPAIR PARTS ;BARE SURFACES AND EDGES OF THE RIB IAW SRM 55-10-09-2R-5 STEP 4.L.;[10] VERIFIED CORRECTION ACTION ITEM 7;8;9 AND MEASUREMENT TABLE.;[11] APPLIED PRIMER TO REPAIR PARTS; BARE SURFACES AND EDGES OF THE RIB IAW SRM 55-10-09-2R-5 STEP 4.M. OK TO INSTALL.;[12] VERIFIED CORRECTION ACTION ITEM 11; OK TO INSTALL GIVEN.;[13] INSTALLED REPAIR PARTS AND APPLIED FILLET SEAL TO REPAIR PARTS IAW SRM 55-10-09-2R-5 STEP 4.N - R.;[14] VERIFIED CORRECTIVE ACTIONS STEP 13.;[15] VERIFIED ALL RII CORRECTION ACTION COMPLETE.;[16] VERIFIED ALL CORRECTION ACTION COMPLETE; CARD COMPLETE.

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