Service difficulty report · Support · Boeing 7377H4

Difficulty date
February 14, 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

R/H FLOOR TO SIDEWALL SUPPORT IS CORRODED AT FASTENER HOLES UPPER SURFACE; BS867+8; +11; +15; RBL22; WL164<[01] REMOVED CORROSION ON FLOOR TO SIDEWALL SUPPORT AT RBL22;WL164;BS867+8.MEASURES:L=.7;W=.7;D=.010';ORIGINAL TICKNESS IS 0.040';REMAINING TICKNESS IS 0.030';FOUND AREA OUT OF LIMITS;IAW SRM 53-00-53-1A-2 ALLOWABLE DAMAGE 2;PARAG 4A(2) DETAIL D FIG.103 AND SRM 53-70-53-0I-2 IDENTIFICATION 2;TABLE 2 FIG 2.TOOL USED ATS2473;S/N UNKNOWN;DUE:08/2023.;[02] ALL PROCESS WILL BE COMPLETED WITH CARD#TTG8Q00HTZSK.;[03] VERIFIED CORRECTIVE ACTION STEPS 1 AND 2.;[04] THE INSTALLATION WILL BE ACCOMPLISHED WITH THE CUSTOMER CARD #TTG8Q004G46G STEP# 33;[05] CORRECTED MEASUREMENT TABLE #17.;[06] VERIFIED CORRECTIVE ACTIONS 4; 5 AND MEASUREMENT TABLE.

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