Service difficulty report · Floor Support · Boeing 73776N

Difficulty date
February 1, 2022
Submitted
February 22, 2022
Operation
Air carrier
Aircraft
N7725A
Make and model
Boeing 73776N
Aircraft serial
32671
Aircraft time
50,724 hours, 25,358 cycles
Part
Floor Support
Condition
Corroded
Location
Aft Cargo Door
Stage of operation
UK
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 AFT CARGO BAY FLOOR TO SIDEWALL SUPPORT FROM STA 727 TO STA 767; RBL 22; WL 156. / REMOVED CORROSION ON FLOOR TO SIDEWALL SUPPORT AT RBL 22 WL 156 BETWEEN BS727 TO BS767 THE LOWEST REMAINING THICKNESS 0.033' ON BLENDED AREA L=3.5'X W=1.2'XD=0.007 ORIG. MAT. THK.=.040' FOUND TO BE OUT OF LIMITS I.A.W SRM 53-00-53-1A-2 STEP 4A FIG. 103 DETAIL D ;SRM 53-60-53-01-2. INSTALLED NEW FLOOR TO SIDEWALL SUPPORT FROM BS727 TO BS767 RBL22 WL156 MAT.ITEM BAC1496-377#7075T62 LOT 1477731-1 IAW. SRM 51-40-02-0G-0 DWG 146A7502;[12] VERIFIED THE INSTALLATION OF THE RBL25 FLOOR TO SIDEWALL SUPPORT FROM BS727-767 PER SRM 51-40-02-0G-0 AND DWG 146A7502.

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