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 RH STAB STA 193.9 25' FROM FWD EDGE 0.4'L<REMOVED DAMAGED SKIN ON R/H HORZ STAB LOWER SKIN STA 193.9 25' FROM FWD EDGE IN AN AREA OF 2.6' X 1.7' IAW SRM 55-10-01-2R-11 REP.11.; 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.;[08] VERIFIED CORRECTIVE ACTION STEP 7.;[09] OK TO INSTALL REPAIR PARTS.;[10] VERIFIED CORRECTIVE ACTION 9.;[11] INSTALLED REPAIR PARTS ON R/H HORZ STAB LOWER SKIN AT BS 193.9'; 21' TO 28' 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.;[12] VERIFIED CORRECTIVE ACTION 11.;[13] APPLIED FILLET SEAL AROUND REPAIR AREA PER SRM 55-10-01-2R 11 REP 11;[14] OK TO CLOSE PANEL 341BZ;[15] INSPECTED AND VERIFIED CORRECTIVE ACTION 13 ONLY. OKAY TO CLOSE WILL BE LATER DUE TO NOT WORKING THIS SHIFT.;[16] OK TO CLOSE PANEL 341BZ.;[17] VERIFIED STEP 1 AND CORRECTIVE ACTION 16.;[18] VERIFIED STEP 1.;[19] COMPLETED STEP #2;[20] VERIFIED ALL STEPS COMPLETED;[21] VERIFIED ALL STEPS AND CORRECTIVE ACTIONS ARE COMPLETE.;[22] VERIFIED SELECTED REF FOR TLD AND VERIFIED CORRECTIVE ACTION 1

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