Service difficulty report · Threshold · Boeing 7377H4

Difficulty date
June 20, 2023
Submitted
July 11, 2023
Operation
Air carrier
Aircraft
N417WN
Make and model
Boeing 7377H4
Aircraft serial
29822
Aircraft time
71,145 hours, 42,399 cycles
Part
Threshold
Part number
UNKNOWN
Condition
Corroded
Location
Zn 100 Fus Lower
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

AFT CARGO BAY SUBTHRESHOLD IS CORRODED. CORROSION IS MEASURED FROM FWD EDGE OF PART AND IS MARKED ACCORDINGLY. (+8 TO+14); (+14 TO +16); (+17 TO+19); (+23 TO +25); (29 TO +32); (+33 TO +35)<[01] PARTIALLY STEPS 1;2;3.;[02] AFT CARGO BAY SUB THRESHOLD MUST BE REPLACED IAW SRM 51-10-02 PARG. 9. C.;[03] VERIFIED STEP 1;2;3 IN PARTIAL.;[04] VERIFIED MEASUREMENT TABLE.;[05] REMOVED THRESHOLD WEB ACB BS 807 TO BS 847 WL 156<BR>IAW SRM 51-40-02;[06] REMOVED THRESHOLD WEB ACB BS 807 TO BS 847 WL 156<BR>IAW SRM 51-40-02;[07] THIS CARD WILL BE ACCOMPLISHED ON THE CARD NUMBER: TTG8Q00LS1JK.;[08] VERIFIED STEP 1;2;3 COMPLETE AND CORRECTION ACTION ITEM 7; CARD COMPLETE.

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