Service difficulty report · Crease Beam · Boeing 7377Q8

Difficulty date
December 23, 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
Crease Beam
Condition
Corroded
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 UPPER SURFACE OF CREASE BEAM WEB BS 685+2' WL 208 LBL 65. REMOVED DAMAGE L=1.0' X W=0.9' IAW SRM 53-40-13-1A-1 PARAGRAPH 2.B. ACCOMPLISHED VISUAL INSPECTION, NO DEFECTS OR CORROSION NOTED. UT INSPECTED BLENDED AREA IAW NDTM PART 4 51-00-00 PROCEDURE 2; REMAINING THICKNESS IS 0.040' ADJACENT TO 0.045'.] EVALUATED DAMAGE ON CREASE BEAM WEB UPPER SURFACE L=1.0'; W=0.9'; D=0.005'. ORIGINAL THICKNESS 0.045' IAW SRM 53-40-13-0I-1 FIG 2. REMAINING THICKNESS 0.040'. DAMAGE OUT OF LIMITS IAW SRM 53-40-13-1A-1 FIG 103 DETAIL F. HFEC INSPECTED OPEN HOLE IAW NDTM PART 6 51-00-00 PROCEDURE 16. NO CRACKS NOTED. CREASE BEAM WEB REPAIR ACCOMPLISED PER EA 21-153-03860. ACCOMPLISHED EA 21-153-03860.

More about the Boeing 737-7Q8