Service difficulty report · Skin · Boeing 7377Q8

Difficulty date
May 12, 2022
Submitted
June 16, 2022
Operation
Air carrier
Aircraft
N7876A
Make and model
Boeing 7377Q8
Aircraft serial
29355
Aircraft time
50,771 hours, 27,451 cycles
Part
Skin
Condition
Cracked
Location
Rh Hor Stab
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

FOUND 1 EA CRACK ON R/H HORIZONTAL STABILIZER IN-SPAR LOWER SKIN AT STA 193.90 RIB; 16' COMMON TO THE FRONT SPAR. / TRIMED OUT LOWER SKIN DAMAGE AREA AT R/H HORIZONTAL STABILIZER AT STA 193.90 RIB; 16' COMMON TO THE FRONT SPAR L=2.650' W=1.6' PER SRM 55-10-01-2R-11 REP 11.;FABRICATED -1 DOUBLER FROM 2024 T3 .080' LOT # 1483761-1 AND -2 FILLER FROM 2024 T3 .063' LOT 1477768-1 AT R/H HORIZONTAL STABILIZER IN SPAR LOWER SKIN STA 193.90 RIB; 16' COMMON TO THE FRONT SPAR PER SRM 55-10-01-2R-11 REP 11.<BR>OK TO TREAT AND PRIME REPAIR PARTS.;[10] VERIFIED CORRECTIVE ACTION 9.;[11] APPLIED CHEMICAL CONVERSION COATING AND PRIMED REPAIR PARTS<BR>AND REPAIR AREA PER SRM 51-20-01-0G-0 AND 55-10-01-2R-11 REP 11. OK TO INSTALL REPAIR PARTS.;[12] VERIFIED CORRECTIVE ACTION 11; OK TO INSTALL GIVEN.;[13] INSTALLED REPAIR PARTS FILLER AND DOUBLER AT R/H HORIZONTAL STABILIZER IN SPAR LOWER SKIN AT STA 193.90 RIB; 16' COMMON TO THE FRONT SPAR ; PER SRM 55-10-01-2R-11 REP 11; AND APPLIED SEALANT AROUND THE EDGES OF REPAIR DOUBLER PER SRM 51-20-05.;[14] NOTE: FOR CLARIFICATION OF LOCATION OF FAULT: VERIFIED CRACK WAS LOCATED ON R/H HORIZ STAB IN-SPAR LOWER SKIN AT STA 193.90 RIB; LOCATED 16' AFT OF THE FRONT SPAR.<BR><BR>VERIFIED CORRECTIVE ACTION 13; INSTALLATION AND SEALING OF REPAIR PARTS.;[15] APPLIED PAINT TO THE REPAIR AREA R/H HORIZONTAL STABILIZER IN SPAR LOWER SKIN STA 193.90 RIB; PER AMM 51-21-73.

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