Service difficulty report · Support · Boeing 7377H4

Difficulty date
April 21, 2022
Submitted
May 9, 2022
Operation
Air carrier
Aircraft
N927WN
Make and model
Boeing 7377H4
Aircraft serial
36889
Aircraft time
45,530 hours, 27,478 cycles
Part
Support
Condition
Corroded
Location
Fwd Cargo
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 FLOOR TO SIDEWALL SUPPORT AT LBL 24 BS 500+13; BS 500+17; BS 500A+2; BS 500A+7; BS 500A+12; BS 500B+2. / [01] VERIFIED SRM 53-00-53-1A-2 TO BE APPLICABLE FOR THIS REPAIR.<BR><BR>REMOVED CORROSION AT SIX AREAS ON FCB FLOOR TO SIDEWALL SUPPORT LBL 24; BS 500+13 - BS 500B+2 PER SRM 51-10-02-0G-0. 1ST AREA BS 500+13 MEASURES: L=0.750; W=0.550; Y=0.008. 2ND. BS 500+17: L=0.600; W=0.400; Y=0.009. 3RD. BS 500A=2: L=0.650; W=0.450;Y=0.010. 4TH. BS 500A+7: L=0.700; W=0.500; Y=0.012. 5TH. 500A+12: L=0.550; W=0.010. 6TH. 500B+2: L=0.500; W=0.300; Y=0.008. ORIGINAL THICKNESS PER SRM 53-30-53-01-2 IS 0.040' WITH A MAX DAMAGE REMOVAL NO MORE THAN 10% OF MATERIAL THICKNESS THEREFORE THE BLEND AREAS ARE OUT OF LIMITS PER SRM 53-00-53-1A-2 STEPS 2. D. (1); 4. A. (2) (A) DETAIL D. <BR><BR>TOOL USED: DIAL DEPTH GAGE<BR>ID:ATS2678<BR>SN:UNKNOWN<BR>DATE:04/2022<BR>DUE:04/2023[06] RECEIVED FCB FLOOR TO SIDE WALL SUPPORT ANGLE PART NUMBER 143A7501U183 BS 396 TO 500D LBL 24; LOCATED AND DRILLED THE NEW SUPPORT ANGLE IAW SRM 51-40-05-0G-0 AND DWG#143A7500;[07] VERIFIED CORRECTIVE ACTION #6.;[08] OK TO INSTALL FWD CARGO BAY LH FLOOR TO SIDEWALL SUPPORT;[09] UPDATED MEASUREMENTS;[10] VERIFIED FWD CARGO BAY LH FLOOR TO SIDEWALL SUPPORT WAS REMOVED AND WILL BE INSTALLED ON CUSTOMER CARD: TTG8Q004FTYD.;[11] NO OK TO INSTALL REQUIRED. VERIFIED FWD CARGO BAY LH FLOOR TO SIDEWALL SUPPORT WAS REMOVED AND WILL BE INSTALLED ON CUSTOMER CARD: TTG8Q004FTYD.

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