SDR DALA2021040501992

Service difficulty report · Skin · Boeing 757231

Difficulty date: December 31, 2019
Submitted: April 5, 2021
Operation: Air carrier
Aircraft: N727TW
Make and model: Boeing 757231
Aircraft serial: 30340
Aircraft time: 73,055 hours, 18,061 cycles
System (JASC): 5730 · Wing, Plate/Skin
Part: Skin
Condition: Cracked
Location: Rt Wing
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

SHIP 6813 WHEN PERFORMING THE INSPECTIONS REQUESTED PER WC 5720-01100-0101B, CRACKS WERE FOUND ON THE BOREHOLES OF THE RHS WING UPPER SKIN HOLES #2, 4, 5, 12, 13, 16, 17 & 18, COMMON TO THE PYLON SUPPORT DRAG FITTINGS. SUBSEQUENTLY, CRACKS WERE REMOVED BY CONCENTRICALLY REAMING HOLES #12, 16 & 18, AND INSTALLING OVERSIZE FASTENERS ON THOSE LOCATIONS. CORRECTIVE ACTION: REF ERA 584089-14 REV A. (1425497)