Service difficulty report · Floorbeam · Boeing 767432ER

Difficulty date
February 19, 2020
Submitted
February 19, 2020
Operation
Air carrier
Aircraft
N839MH
Make and model
Boeing 767432ER
Aircraft serial
29712
Aircraft time
78,934 hours, 14,163 cycles
Part
Floorbeam
Condition
Corroded
Location
Bs 1480
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

MTC TASK-FLOOR STRUCTURE FOUND CORROSION AT RBL 30 TO RBL 40,STA 1480. REF. TO CPCP TASK 53-644-00. LOG-PAGE UPDATED FLOOR STRUCTURE CORRODED AREA BLEND OUT AND MEASURED:THE BLEND OUT SIZE:1.2"X0.5",THE ORIGINAL THICKNESS IS 0.090",THE REMAINING THICKNESS IS 0.051"<0.8T(0.072") ON THE RBL 40 FWD FLANGE OF UPPER SURFACE AND FOUND EXCEED THE LIMIT AS PER B767- 400 SRM 53-00-51-1A-1 RELEASE 59.00 DATE:19.DEC.19.FLOOR STRUCTURE AT RBL 30 TO RBL 40 REPAIRED AS PER B767-400 SRM 53-00 -51-2R-2 RELEASE 59.00 DATE:19.DEC.19. LOG-PAGE UPDATED (1496128)