Service difficulty report · Web · Boeing 7378H4

Difficulty date
August 4, 2022
Submitted
August 25, 2022
Operation
Air carrier
Aircraft
N8656B
Make and model
Boeing 7378H4
Aircraft serial
42530
Aircraft time
24,629 hours, 11,108 cycles
Part
Web
Condition
Corroded
Location
Fwd Cargo
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 THRESHOLD AT RBL 28 BS 440+8; BS 440+14; BS 460+2; BS 460+4; BS 460+9; BS 460+11; BS 460+18; BS 480+2; BS 480+4. / [01] REMOVED CORROSION FROM FCD THRESHOLD WEB AT BS 440+8 MEASURED 1.8'W X 1.8'L AND 0.004' DEEP; ORIGINAL THICKNESS OF 0.045'. FOUND TO BE IN LIMITS PER SRM 53-30-15-1A-1REMOVED CORROSION FROM FCD THRESHOLD WEB AT BS 440+14 MEASURED 1.6'W X 22.6'L AND 0.0075' DEEP; ORIGINAL THICKNESS OF 0.045'. FOUND TO BE OUT OF LIMITS PER SRM 53-30-15-1A-1<BR><BR>REMOVED CORROSION FROM FCD THRESHOLD WEB AT BS 460+2 MEASURED 1.6'W X 22.6'L AND 0.008' DEEP; ORIGINAL THICKNESS OF 0.045'. FOUND TO BE OUT OF LIMITS PER SRM 53-30-15-1A-1 REMOVED CORROSION FROM FCD THRESHOLD WEB AT BS 460+4 FOUND TO BE IN LIMITS PER SRM 53-30-15-1A-1<BR><BR>REMOVED CORROSION FROM FCD THRESHOLD WEB AT BS 460+9 MEASURED 1.6'W X 22.6'L AND 0.009' DEEP; ORIGINAL THICKNESS OF 0.045'. FOUND TO BE OUT OF LIMITS PER SRM 53-30-15-1A-1<BR><BR>REMOVED CORROSION FROM FCD THRESHOLD WEB AT BS 460+11 MEASURED 1.6'W X 22.6'L AND 0.0035' DEEP; ORIGINAL THICKNESS OF 0.045'. FOUND TO BE IN LIMITS PER SRM 53-30-15-1A-1<BR><BR>REMOVED CORROSION FROM FCD THRESHOLD WEB AT BS 460+18 MEASURED 0.9'W X 1.4'L AND 0.015' DEEP; ORIGINAL THICKNESS OF 0.045'. FOUND TO BE OUT OF LIMITS LIMITS PER SRM 53-30-15-1A-1[08] INSTALLED NEW THRESHOLD WEB BTW B/S 440 TO B/S 492.4 IAW SRM 51-40-02 AND DWG 143A8330 REV:A;[09] VERIFIED ITEM 8 CORRECTIVE ACTIONS.;[10] VERIFIED MEASUREMENTS.

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