Service difficulty report · Skin · Boeing 757232

Difficulty date
October 22, 1996
Submitted
March 26, 2000
Operation
Air carrier
Aircraft
N620DL
Make and model
Boeing 757232
Aircraft serial
22910
Part
Skin
Part number
311N3450
Condition
Cracked
Location
Nr 1 Pylon
Stage of operation
IN
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

THE O/B SKIN OF THE NR 1 ENGINE PYLON WAS FOUND TO HAVE A CRACK CONTINUING BEYOND A PREVIOUS STOP DRILL OUT OF THE UPPER, FWD CORNER OF THE FWD ACCESS OPENING AT NS 112.92. WHEN ROUTED OUT, THE TOTAL LENGTH WAS 1.50 INCH. THE SKIN AT THIS LOCATION IS FABRICATED FROM THREE BONDED 0.080 2024-T3 CLAD SHEETS. THIS CONDITION IS ADDRESSED BY B757 SRM SECTION 54-41-01, PG 210 AND FOLLOWING. IN ADDITION, THERE WAS A CRACK OUT OF THE FWD SIDE OF THE ACCESS OPENING CENTERED AT NS 122.3. AFTER ROUTING OUT, THIS MEASURED .50.