Service difficulty report · Support · 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
Support
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

FWD CARGO BAY - SIDEWALL SUPPORT HAS CORROSION LBL23 BS 500A+2; BS 500A+6; BS 500A+10; BS 500A+14.<[01] VERIFIED APPLICABILITY SRM 53-30-53-0I-2 FOR IDENTIFICATION AND SRM 53-00-53-1A-2 FOR ALLOWABLE DAMAGE.;[02] REMOVED CORROSION ON FWD CARGO BAY SIDEWALL SUPPORT AT LBL 23 BS 500A+6 IAW SRM 51-10-02.<BR><BR>EVALUATED BLENDED AREA L=1.100' W=0.800' ORIGINAL THICKNESS 0.040' PER BAC1496-444 REMAINING 0.020' LOSS 0.020'; MAX MAT REMOVE ALLOWABLE 0.004'; FOUND TO BE OUT OF LIMITS IAW SRM 53-00-53-1A-2 PARA 4A (2) FIG 103 DETAIL D.<BR>TOOL ID: ATS2827 S/N: UNKNOWN DUE:01/31/24;[03] JOB CARD WILL BE ACCOMPLISHED ON N/C TTG8Q00HS4VM;[04] VERIFIED CORRECTIVE ACTION STEP 3. VERIFIED MEASUREMENT TABLE AND TASK CARD COMPLETE.

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