Service difficulty report · Skin · Boeing 7377H4

Difficulty date
April 6, 2023
Submitted
April 28, 2023
Operation
Air carrier
Aircraft
N412WN
Make and model
Boeing 7377H4
Aircraft serial
29818
Aircraft time
71,376 hours, 42,351 cycles
Part
Skin
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

CRACK FOUND LH HORZ STAB LOWER SKIN STA 193.9 17' FROM FWD EDGE .8'L<REMOVED DAMAGED SKIN ON LH HORZ STAB LOWER SKIN STA 193.9 17' FROM FWD EDGE IAW SRM 55-10-01-2R-11 REP.11 STEP 4.B.1.; IN AN AREA OF 1.5' X 2.7'FABRICATED; LOCATED; DRILLED; AND APPLIED CHEMICAL CONVERSION COATING AND PRIMER ON REPAIR PARTS IAW SRM 55-10-01-2R 11 REP 11 PAR.4G-N MATERIAL USED FOR -1 DOUBLER 2024T3 0.080' CLAD LOT#1497191-1; -2 FILLER 2024T3 0.063 CLAD 'LOT#1517370-1.;[09] VERIFIED CORRECTIVE ACTION STEP 8.;[10] OK TO INSTALL REPAIR PARTS.;[11] VERIFIED CORRECTIVE ACTION 10.;[12] INSTALLED REPAIR PARTS ON L/H HORZ STAB LOWER SKIN AT BS 193.9'; 13.5' TO 22' FROM FWD EDGE AND APPLIED CIC ON INTERNAL SURFACE COMMON TO REPAIR AREA PER SRM 55-10-01-2R 11 REP 11; AND AMM 51-21-91-620-802. OK TO CLOSE PANEL 331BZ;[13] VERIFIED CORRECTIVE ACTION 12;[14] COMPLETED STEP 1;[15] APPLIED FILLET SEAL AROUND REPAIR AREA PER SRM 55-10-01-2R 11 REP 11.;[16] COMPLETED STEP 2 AND 3;[17] ALL STEPS COMPLETED;[18] RII VERIFIED CORRECTIVE ACTION ITEM 14 AND 15.;[19] ADDED QC SUPERVISOR REVIEW FOR CAT B FOLLOW ON REQUIREMENTS.;[20] COMPLETED STEP 4;[21] VERIFIED STEP 4.;[22] VERIFIED MEASUREMENT TABLE.;[23] VERIFIED SELECTED REF AND CORRECTIVE ACTION 3 FOR TLD REQUIREMENTS

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