Service difficulty report · Stringer · Boeing 7377Q8

Difficulty date
December 7, 2021
Submitted
April 26, 2022
Operation
Air carrier
Aircraft
N7865A
Make and model
Boeing 7377Q8
Aircraft serial
30647
Aircraft time
54,104 hours, 35,814 cycles
Part
Stringer
Part number
21RH
Condition
Cracked
Location
Fwd Cargo Bay
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

CRACK ON FWD CARGO BAY BS 540 R/H STRINGER 21. ; / STRINGER DAMAGE FOUND TO BE OUT LIMITS IAW SRM 53-00-03-1A FIG 103.; [02] VERIFIED APPLICABILITY FOR REPAIR BETWEEN BS 500D - 540; STR- 21R IAW SRM 53-00-03-2R-1; [03] VERIFIED APPLICABILITY OF SRM 53-00-03-2R-1 AND DAMAGE OUT OF LIMITS PER SRM 53-00-03-1A; [04] REMOVED POWER FEEDER CABLE BRACKET ASSY PN 287A4011-43 FROM BS 520+12'; STR- 21R PER SRM 51-40-02 RECEIVED NEW STRINGER SECTION P/N: HFAB53-STS-011 ;LOT:1476840 ; P.O:848511 AND NEW HAT SECTION P/N : HFAB53-HS-011 ; LOT:1477125 ; P.O: 848512. FABRICATED STRINGER SECTION FROM 7075-T6 0.056' AND HAT SECTION FROM 7075-T6 0.063' <BR><BR>LOCATED AND DRILLED STRINGER SECTION AND HAT SECTION AT STR 21 R/H BS 500D+4' TO 536 AND APPLIED CHEMICAL CONVERSION COATING IAW SRM 53-00-03-2R-1 PAR. 4 STEPS D TO I.FABRICATED STRINGER SECTION FROM 7075-T6 0.056' AND HAT SECTION FROM 7075-T6 0.063' <BR><BR>LOCATED AND DRILLED STRINGER SECTION AND HAT SECTION AT STR 21 R/H BS 500D+4' TO 536 AND APPLIED CHEMICAL CONVERSION COATING IAW SRM 53-00-03-2R-1 PAR. 4 STEPS D TO I. OK TO APPLY PRIMER TO REPAIR PARTS.; [12] APPLIED PRIMER TO REPAIR PARTS IAW SRM 53-00-03-2R-1 PAR. 4 STEPS J

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