Service difficulty report · Threshold · Boeing 7377Q8

Difficulty date
May 9, 2022
Submitted
June 8, 2022
Operation
Air carrier
Aircraft
N7875A
Make and model
Boeing 7377Q8
Aircraft serial
29354
Aircraft time
50,797 hours, 27,672 cycles
Part
Threshold
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 27 BS 460+16. CORROSION FOUND ON FWD CARGO BAY SUB THRESHOLD WEB AT RBL 27 BS 460+16 /VERIFIED APPLICABILITY OF SRM 53-30-15-01-1 AND SRM 53-30-15-1A-1 FOR ALLOWABLE LIMIT;REMOVED CORROSION FROM FWD CARGO BAY SUBTHRESHOLD WEB IN AREA OF 8' X 1' X 0.015' DEEP ORIGINAL MATERIAL THICKNESS 0.045' FOUND TO BE OUT OF LIMIT IAW SRM 53-30-15-1A-1 DET.4(G)2 FIG 103-D REMOVED ON F.C.B. SUB-THRESHOLD BTW. BS 440 - BS452.4 RBL 24 I.A.W. SRM. 51-40-02; RECEIVED WEB WITH P/N. 654A0003-58; LOT 1490972-1. LOCATED AND DRILLED WEB BTW BS 440 - BS.492.4 IAW SRM 51-40-05 & DWG# 143A8330 REV:A; DWG# 143A8120; REV: A.;THE ENAMEL PAINT & ONE COAT OF BMS3-35 CIC ON THE PART. INSTALLED ON F.C.B. SUB-THRESHOLD BTW. BS 440 - BS492.4 RBL 24 I.A.W. SRM. 51-40-02; DWG#143A8330.

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