Service difficulty report · Support · Boeing 73776N

Difficulty date
November 15, 2021
Submitted
December 13, 2021
Operation
Air carrier
Aircraft
N7722B
Make and model
Boeing 73776N
Aircraft serial
32668
Aircraft time
49,599 hours, 25,042 cycles
Part
Support
Condition
Corroded
Location
Fuselage
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 FWD CARGO BAY FLOOR TO SIDEWALL SUPPORT AT RBL 24 BS 419. REMOVED CORROSION, L=.4 X W=.5 X D=0.008 ORIGINAL THICKNESS 0.040 MAT REMAINING 0.032 FOUND TO BE OUT LIMITS PER SRM 53-00-53-1A-2 STEP 4.A.(2)(A) DETAIL D. FABRICATED NEW FLOOR TO SIDEWALL. LOCATED & DRILLED IAW SRM 51-40-05; SRM 53-30-53-01-02 TABLE 2, DWG 143A7501. APPLIED CHEMICAL CONVERSION COAT IAW. 51-20-01. APPLIED PRIMER TO SIDEWALL SUPPORT AT RBL 24 BS 400 TO BS 420 IAW SOPM 20-40-01. VERIFIED APPLICATION OF PRIMER IAW SOPM 20-41-02; FCB FLOOR TO SIDEWALL SUPPORT RBL 24 BS 419 WILL BE INSTALLED ON CUSTOMER CARD # TTG8Q004FMEJ.

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