Service difficulty report · Rib · 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
58,394 hours, 34,758 cycles
Part
Rib
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 2ND STIFFENER<[01] OPENED PANEL 343CB TO ACCESS REPAIR IAW SOPM 20-50-01.;;[13] ACCOMPLISHED HFEC SURFACE SCAN ON CUT OUT IAW 737 NDTM PART 6 CHAPTER 51-00-00 PROCEDURE 23. NO CRACKS NOTED.<BR><BR>EQUIPMENT USED: NORTEC 600 ID: ATS1465 CAL DUE: 09/2023;[14] UPDATED MEASUREMENTS SECTION.;[15] ACCOMPLISHED A GVI OF ALL AREAS WITHIN REPAIR AREA FOR CORROSION; EXISTING REPAIRS OR ANY OTHER DEFECTS; NO DISCREPANCIES FOUND IAW SRM 55-10-09-2R-5 STEP 4.F.;[16] 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 & (4)SHIM 7075-T6; 0.016' THICK LOT #1439717-1 IAW SRM 55-10-09-2R-5 STEP 4.G - K.[34] INSTALLED DISPLACED RIGHT HAND HORIZONTAL STABILIZER FRONT SPAR WEB AT STAB STA 111.10 - 145.90 IAW SRM 51-40-02-0G-0 & BAC DRAWING #182A2401.SH 23.;[35] VERIFIED CORRECTION ACTION ITEM 34.;[36] VERIFIED CORRECTION ACTION ITEM 33.;[37] VERIFIED MEASUREMENT TABLE;[38] VERIFIED RII STEPS COMPLETE

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