Service difficulty report · Support · Boeing 7377H4

Difficulty date
June 9, 2021
Submitted
July 16, 2021
Operation
Air carrier
Aircraft
N489WN
Make and model
Boeing 7377H4
Aircraft serial
33855
Aircraft time
54,253 hours, 32,244 cycles
Part
Support
Condition
Corroded
Location
Bs 764-794
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 FLOOR TO SIDEWALL SUPPORT AT AFT CARGO BAY BS764 - BS794 LBL21 WL156. ; / [01] UPDATED MEASUREMENT TABLE; [02] EVALUATED CORROSION FROM 764-794 DEEPEST MEASUREMENT WAS AT BS 767 FOUND 0.020 REMOVED FROM ORIG 0.040 FOUND TO BE OUT OF LIMITS PER SRM 53-00-53-1A-2 USING MICROMETER P/N 4566A S/N UNKOWN; [03] VERIFIED OUT OF LIMITS; [04] PART WILL BE REMOVED AND REPLACED FROM BS 727 TO BS 847 IN FAULT # TTG8Q005DWT5; [05] VERIFIED REFERENCES; OUT-OF-LIMITS STATEMENT; AND WORK TO BE ACCOMPLISHED ON FAULT# TTG8Q005DWT5

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