Service difficulty report · Floorbeam · Boeing 7377Q8

Difficulty date
December 14, 2021
Submitted
February 2, 2022
Operation
Air carrier
Aircraft
N7864B
Make and model
Boeing 7377Q8
Aircraft serial
30638
Aircraft time
57,729 hours, 38,472 cycles
Part
Floorbeam
Condition
Corroded
Location
Fuselage
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 FLOORBEAM AT BS 986, RBL 36 - 44, WL208.1. REMOVED CORROSION IAW SRM 51-10-02-0G-0, MEASURES L=2.5'' X W=1.250'' D=0.030'' ORIGINAL THICKNESS=0.150''. FOUND TO BE OUT OF LIMITS IAW SRM 53-70-51-1A-1 PART 4H DETAIL C. PERFORMED A DETAILED INSPECTION OF THE DAMAGED AREA IAW SRM 53-70-51-2R-6, STEP 4.B. FOUND ADDITIONAL CORROSION ON FLOORBEAM FWD HORIZONTAL FLANGE LWR SURFACE AT REMOVED NUTPLATE LOCATION RBL 44, WL208. INSTALLED FLOORBEAM REPAIR STRAP IAW SRM 53-70-51-2R-6 REPAIR 6 ALTERNATIVE 1 & ER 21-153-03834-WIP1; INSTALLED FLOORBEAM REPAIR STRAP IAW SRM 53-70-51-2R-6, REPAIR 6 ALTERNATIVE 1 PART 4(O) - 4(S), & ER 21-153-03834-WIP1.

More about the Boeing 737-7Q8