Service difficulty report · Support · Boeing 737*

Difficulty date
October 7, 2021
Submitted
November 22, 2021
Operation
Air carrier
Aircraft
N450WN
Make and model
Boeing 737*
Aircraft serial
32470
Aircraft time
58,641 hours, 34,716 cycles
Part
Support
Condition
Corroded
Location
Fuselage
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 FED THRESHOLD SUPPORT BS 328-328+10 LBL 60 WL208 ; / [01] REMOVED CORROSION ON FED THRESHOLD SUPPORT BS 328-328+10 LBL 60 WL 208 PER SRM 51-10-02. MAXIMUM MATERIAL REMOVED WAS 1'X1'X.010'. ORIGINAL THICKNESS WAS .080'. FOUND TO BE OUT OF LIMITS PER SRM 53-10-15-1A-2. MICROMETER IDIS000461 SN:67126205.; [02] VERIFIED CORRECTIVE ACTION 1.; [03] VERIFIED LOCATED AND DRILLED NEW THRESHOLD ANGLE PER SRM 51-40-05 AND DWG#141A8110. AND GAVE OK TO INSTALL.PARTIAL WORK UPDATE FOR STEP 1.; [04] INSTALLED NEW FED THRESHOLD SUPPORT BS 328-328+10 LBL 60 WL 208 PER SRM 51-40-02 AND DWG#141A8110.; [05] INSTALLED NEW FED THRESHOLD SUPPORT BS 328-328+10 LBL 60 WL 208 PER SRM 51-40-02 AND DWG#141A8110.; [06] VERIFIED CORRECTIVE ACTION STEPS 4 AND 5.