Service difficulty report · Support · Boeing 7377H4

Difficulty date
January 25, 2023
Submitted
March 6, 2023
Operation
Air carrier
Aircraft
N955WN
Make and model
Boeing 7377H4
Aircraft serial
36671
Aircraft time
38,739 hours, 23,607 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

CORROSION ON AFT CARGO BAY FLOOR TO SIDEWALL SUPPORT FROM STA 727A+1 TO STA 787+7; LBL 20 TO 22; WL 156<[01] REMOVED CORROSION FROM ACB FLOOR TO SIDEWALL SUPPORT FROM STA. 727A + 1' TO STA. 787 +7'; LBL 20 TO 22; WL 156 IAW SRM 51-10-02-0G-0; PARR 6.<BR>BLENDED AREAS MEASUREMENTS:<BR>BS 727A +1': L = 0.900'; W = 0.600'; D = 0.003'.<BR>BS 727B - 2': L = 1'; W = 0.800'; D = 0.002'.<BR>BS 727B + 10': L = 1.100'; W = 0.800'; D = 0.002'.<BR>BS 727C - 2': L = 0.700'; W = 0.700'; D = 0.002'.<BR>BS 727C + 2': L = 1.100'; W = 1.000'; D = 0.002'.<BR>BS 727C + 6': L = 1.400'; W = 0.900'; D = 0.005'; AND FOUND OUT OF LIMITS IAW SRM 53-00-53-1A-2; [07] PARTIAL UPDATE STEP 2.;[08] PARTIAL UPDATE STEP 2.;[09] PARTIAL UPDATE STEP 2.;[10] PARTIAL UPDATE STEP 2.;[11] UPDATED MEASUREMENT TABLE;[12] UPDATED STEP 1;[13] COMPLETED STEP 1.<BR>PROVIDED PARTIAL UPDATE TO STEP 2.;[14] PARTIAL UPDATE STEP 2.;[15] PARTIAL UPDATED STEP 2.;[16] ALL STEPS COMPLETE;[17] VERIFIED ALL STEPS COMPLETE;[18] VERIFIED MEASUREMENT TABLE

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