Service difficulty report · Floorbeam · Boeing 7377H4

Difficulty date
December 20, 2022
Submitted
January 23, 2023
Operation
Air carrier
Aircraft
N272WN
Make and model
Boeing 7377H4
Aircraft serial
32527
Aircraft time
52,973 hours, 31,748 cycles
Part
Floorbeam
Condition
Corroded
Location
Bs 986, Rbl 45
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

CORROSION ON BS 986 FLOORBEAM AT RBL 45. REMOVED CORROSION AND FOUND TO BE OUT OF LIMITS 53-70-51-1A-1 STEP 4H 2-B FIG 103 N. CUT OUT DAMAGED AREA IAW SRM 53-70-51-2R-6, FLAP PEENED BLENDED AREA IAW SRM 53-70-51-2R-6 STEP 4-E AND SOPM 20-10-03. LOCATED, DRILLED, COUNTERSUNK, TRIMMED TO SIZE, DEBURRED, AND APPLIED CHEMICAL CONVERSION COATING TO REPAIR PARTS AND TRIM OUT IAW SRM 53-70-51-2R-6 PARA. 4F(4); 4G-K; TABLE 204; FIGURE 205. APPLIED PRIMER TO REPAIR PARTS AND TRIM OUT AREA PER SRM 53-70-51-2R-6 PARA. 4L. INSTALLED THE REPAIR IAW SRM 51-40-02-0G-0 AND SRM 53-70-51-2R-6.

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