Service difficulty report · Stiffener · Boeing 7377Q8

Difficulty date
May 11, 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
Stiffener
Condition
Cracked
Location
Lh 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

LEFT HAND HORIZONTAL STABILIZER INSPAR RIB; AT STABILIZER STATION 129.50; 3RD VERTICAL STIFFENER IS CRACKED. / [01] REMOVED DAMAGED PART FROM 3RD VERTICAL STIFFENER AND WEB IAW SRM 55-10-09-2R-4; STEP 4.B. FABRICATED REPAIR PARTS (1) T-SECTION FROM 60-5872 7075 T76511 LOT#1449876-1 (2) ANGLE FROM BAC 1490-2793 7075 T62 CLAD LOT# 1442205-1 (3) SHIM FROM 7075 T6 0.020' CLAD LOT# 1381332-1; APPLIED CHEMICAL CONVERSION COATING IAW SRM 55-10-09-2R-4 OK TO PRIME.; PRIMED LH RIB REPAIR PARTS (1) T-SECTION; (2) ANGLE ; (3) SHIMS AND STRUCTURE WITHIN THE REPAIR AREA IAW SOPM 20-41-02 AND SRM 55-10-09-2R-4 REPAIR 4. <BR><BR>OK TO INSTALL.;[08] VERIFIED CORRECTIVE ACTION ENTRY 7. OK TO INSTALL GIVEN.;[09] VERIFIED SRM 55-10-09-2R-4 REPAIR 4 IS APPLICABLE FOR THIS AIRCRAFT;[10] INSTALLED LEFT HAND HORIZONTAL STABILIZER INSPAR RIB REPAIR PARTS (1) T-SECTION; (2) ANGLE ; (3) SHIMS ; AT STABILIZER STATION 120.30; 4TH VERTICAL STIFFENER IAW SRM 55-10-09-2R-4 REPAIR 4.<BR><BR>APPLIED FILLET SEAL TO THE REPAIR PARTS WITH BMS 5-95 SEALANT IAW SRM 51-20-05.;[11] INSTALLED LEFT HAND HORIZONTAL STABILIZER INSPAR RIB REPAIR PARTS (1) T-SECTION; (2) ANGLE ; (3) SHIMS ; AT STABILIZER STATION 129.50; 3RD VERTICAL STIFFENER IAW SRM 55-10-09-2R-4 REPAIR 4.<BR><BR>APPLIED FILLET SEAL TO THE REPAIR PARTS WITH BMS 5-95 SEALANT IAW SRM 51-20-05.;[12] CORRECTED STAB STA 129.50 AND 3RD VERTICAL STIFFENER

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