Service difficulty report · Angle · Boeing 7377H4

Difficulty date
August 15, 2022
Submitted
September 23, 2022
Operation
Air carrier
Aircraft
N489WN
Make and model
Boeing 7377H4
Aircraft serial
33855
Aircraft time
57,460 hours, 34,246 cycles
Part
Angle
Condition
Cracked
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

INDICATION OF CRACK AT VAPOR BARRIER PRESSURE WEB UPPER ATTACH ANGLE AT LBL 43 BS 663 WL 164. FWD SIDE / [01] REQUEST NDI FOR HFEC INSPECTION FOR CRACK FREE CONDITION;;[34] INSTALLED AT L/H VAPOR BARRIER PRESSURE WEB UPPER ATTACH ANGLE AT LBL 6 TO LBL 65 BS 663 WL 164 IAW SRM 51-40-02-0G-0 AND DWG 111A1000 REV.-REQ. OK TO SEAL FASTENERS;[35] VERIFIED STEP 1.;[36] VERIFIED INSTALLATION OF THE BS663 UPPER L ANGLE FROM LBL3- LBL60 PER SRM 51-40-02-0G-0 AND DWG 111A1000 REV.-. OK TO CAP SEAL FASTENERS COMMON TO THE BS663 WEB AND IN TANK FASTENERS.;[37] APPLIED CAP SEAL AT FASTENERS AFT SIDE L/H VAPOR VARRIER AND HEAD FASTENERS COMMON TO FUEL TANK IAW AMM 51-31-00-390-805 AND APPLIED EDGE SEAL AT UPPER ATTACH ANGLE IAW AMM 51-31-00-39-804;[38] VERIFIED CORRECTIVE ACTION 37. DAVCOR WILL SEAL THE IN-TANK FASTENERS ON THEIR WORK ORDER.

More about the Boeing 737-7H4