Service difficulty report · Strap · Boeing 7377H4

Difficulty date
May 12, 2021
Submitted
June 14, 2021
Operation
Air carrier
Aircraft
N222WN
Make and model
Boeing 7377H4
Aircraft serial
34290
Aircraft time
52,415 hours, 31,247 cycles
Part
Strap
Condition
Corroded
Location
Bs 775-808
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*** ON STRAP AT AFT CARGO BAY BS808- BS775 RBL19 WL158. ; / DAMAGE FOUND ON ACB STRAP BS775- BS808 RBL19 WL158 FOUND TO BE OUT OF LIMITS DUE TO CORROSION AT VARIOUS FASTENER LOCATIONS IAW SRM53-60-15-1A-1 STEP 4(G) 3 B. FIGURE 103 D EVALUATED DAMAGE FOUND ON ACB STRAP BS 775-BS808 RBL 19 WL 158 REMOVED CORROSION IN AREA OF 1'' X 1'' X 0.030'' DEEP AT ORIGINAL MATERIAL THICKNESS 0.100'' FOUND TO BE OUT OF LIMIT IAW SRM 53-6-15-1A-1 STEP 4(G) 3 B. FIGURE 103 D MATERIAL USED DIAL DEPTH GUAGE ID # ATS400 EVALUATED DAMAGE FOUND ON ACB STRAP BS 775-BS808 RBL 19 WL 158 REMOVED CORROSION IN AREA OF 1'' X 1'' X 0.030'' DEEP AT ORIGINAL MATERIAL THICKNESS 0.100'' FOUND TO BE OUT OF LIMIT IAW SRM 53-60-15-1A-1 STEP 4(G) 3 B. FIGURE 103 D MATERIAL USED DIAL DEPTH GAUGE ID # ATS400 S/N UNKNOWN VERIFIED EVALUATION OF DAMAGE FOUND ON ACB STRAP BS 775-BS808 RBL 19 WL 158 REMOVED CORROSION IN AREA OF 1'' X 1'' X 0.030'' DEEP AT ORIGINAL MATERIAL THICKNESS 0.100'' FOUND TO BE OUT OF LIMITS IAW SRM 53-60-15-1A-1 STEP 4(G) 3 B. FIGURE 103 D TOOL USED DIAL DEPTH GAUGE ID # ATS400 S/N UNKNOWN LOCATED AND DRILLED ACB STRAP BS 774 - BS 864 RBL 19 WL 158 I.A.W SRM 51-40-05-0G-0 LOCATED AND DRILLED ACB STRAP BS 774 - BS 864 RBL 19 WL 158 I.A.W SRM 51-40-05-0G-0 OK TO INSTALL ACB STRAP FROM BS774-BS864 RBL19 CONFIRMED ALL ACTIONS AND OK TO INSTALL PARTS. INSTALLED ACB STRAP FROM BS775-BS850 RBL19 IAW SRM 51-40-02 AND IAW DWG# 146A8120

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