Service difficulty report · Threshold · Boeing 7377H4

Difficulty date
February 11, 2023
Submitted
March 13, 2023
Operation
Air carrier
Aircraft
N289CT
Make and model
Boeing 7377H4
Aircraft serial
36633
Aircraft time
50,940 hours, 30,659 cycles
Part
Threshold
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

CORROSION ON FWD CARGO BAY THRESHOLD AT RBL 29 BS 440+7; BS 440+17. (MARKED)<[01] VERIFIED APPLICABILITY IAW SRM 53-30-15-0L-1 FOR IDENTIFICATION AND SRM 53-30-15-1A-1 FOR ALLOWABLE DAMAGE.<BR>STEPS 1 AND 2 PARTIAL.;[02] VERIFIED CORRECTIVE ACTION STEP 1.;[03] LOCATED AND DRILLED NEW FWD CARGO BAY THRESHOLD AT RBL 29 BS 440 TO BS 495 I.A.W SRM 51-40-05-0G-0 AND DWG 143A8122.;[04] VERIFIED CORRECTIVE ACTION STEP 3.;[05] JOB CARD WILL BE ACCOMPLISHED ON N/C TTG8Q00HSBYJ;[06] JOB CARD WILL BE ACCOMPLISHED ON CARD 5330-E-16461-NG [TTG8Q004DRF3];[07] UP DATED PARTS REQUIREMENTS;[08] VERIFIED CORRECTIVE ACTION STEPS5;6 AND 7. TASK CARD COMPLETE.;[09] VERIFIED MEASUREMENT TABLE.

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