Service difficulty report · Sidewall Support · Boeing 7377H4

Difficulty date
August 19, 2021
Submitted
September 27, 2021
Operation
Air carrier
Aircraft
N208WN
Make and model
Boeing 7377H4
Aircraft serial
29856
Aircraft time
52,294 hours, 30,932 cycles
Part
Sidewall Support
Condition
Corroded
Location
Bs 429-433 Lbl25
Stage of operation
IN
How discovered
V
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 FLOOR TO SIDEWALL SUPPORT BS 429 TO BS 433 LBL 25 WL 156 ; / [01] BLENDED CORROSION ON LH FLOOR TO SIDEWALL SUPPORT FROM BS 429- BS 433. REMOVED .010' (AT DEEPEST BLEND) MATERIAL IN A AREA MEASURING .3' X .4'. ORIGINAL THICKNESS IS .040' THEREFORE THE PART IS OUT OF LIMITS BECAUSE MATERIAL REMOVAL EXCEEDS 10% OF MATERIAL THICKNESS PER SRM 53-00-53-1A-2. STEP 4. A (2) FIGURE 103<BR><BR>THIS PART WILL BE REPLACED ON CUSTOMER CARD: TTG8Q0067PPS<BR><BR>DEPTH GUAGE USED:<BR>ID:ATS401<BR>S/N: UNKNOWN<BR>DATE:07/2021<BR>DUE:07/2022; [02] VERIFIED BLEND AREA EXCEEDS ALLOWABLE LIMITS PER SRM 53-00-53-1A-2. STEP 4. A (2) FIGURE 103; AND WILL BE REPLACED ON TTG8Q0067PPS; [03] CORRECTED MEASUREMENTS SECTION

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