Service difficulty report · Stiffener · Boeing 7377BD

Difficulty date
January 24, 2022
Submitted
April 4, 2022
Operation
Air carrier
Aircraft
N7730A
Make and model
Boeing 7377BD
Aircraft serial
33926
Aircraft time
51,354 hours, 27,779 cycles
Part
Stiffener
Condition
Cracked
Location
L/H Horiz. Stab.
Stage of operation
NR
How discovered
9
Nature of condition
O
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

L /H HORZ STAB RIB AT STAB STA. 129.50 HAS A CRACK AT THE 4TH STIFFENER FROM THE FRONT / [01] VERIFIED APPLICABILITY OF SRM 55-10-09-2R-4.[13] FABRICATED REPAIR PARTS; T-SECTION 7075-T76511 0.063' THICK LOT # 1430775-2; ANGLE BAC1490 7075-T62 0.063' THICK LOT # 1464923-1; FILLER 7075-T6 0.050' THICK LOT # 1376846-2; SHIM (2EA) 7075-T6 0.016' THICK LOT # 1439717-1 IAW SRM 55-10-09-2R-5 STEP 4. G - K.;18] INSTALLED REPAIR PARTS AND APPLIED FILLET SEAL TO REPAIR PARTS IAW SRM 55-10-09-2R-5 STEP 4. N - R.;[19] VERIFIED INSTALLATION OF REPAIR PARTS AND APPLIED FILLET SEAL TO REPAIR PARTS IAW SRM 55-10-09-2R-5 STEP 4. N - R.;[20] (OUT OF SEQUENCE STEP).REMOVED L/H HORIZONTAL STABILIZER RIB AT STAB STA 129.50 TO ACCESS REPAIR IAW SRM 51-40-02. OK TO INSTALL STAB RIB.;[21] OK TO INSTALL STAB RIB;[22] INSTALLED L/H HORIZONTAL STABILIZER RIB AT STAB STA 129.50 IAW SRM 51-40-02-0G-0 AND BAC DRAWINGS # 002A0001; 182A3001 AND 182A1500.;[23] VERIFIED INSTALLATION OF L/H HORIZONTAL STABILIZER RIB AT STAB STA 129.50 IAW SRM 51-40-02-0G-0 AND BAC DRAWINGS # 002A0001; 182A3001 AND 182A1500.;[24] APPLIED PAINT ON REWORKED SURFACES OF LEFT HORIZONTAL STABILIZER LOWER AND UPPER SKINS AT STAB STA 129.50 IAW AMM 51-21-99-300-801.;[25] RII VERIFIED ALL STEPS COMPLETE PER SRM 55-10-09-2R-5.;[26] VERIFIED ALL STEPS COMPLETE; JOB COMPLETE.

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