Service difficulty report · Winglet · Boeing 7377CT

Difficulty date
April 26, 2023
Submitted
May 31, 2023
Operation
Air carrier
Aircraft
N570WN
Make and model
Boeing 7377CT
Aircraft serial
33657
Aircraft time
63,400 hours, 32,540 cycles
Part
Winglet
Part number
UNKNOWN
Condition
Delaminated
Location
Zn 600 Right Win
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

RH WINGLET AFT (CARBON FIBER) SPAR ;SIGNS OF DELAMINATION AND LOOSE FIBERS AT MOST UPPER TOOLING HOLES.<[01] DAMAGE FOUND AT RH WINGLET UPPER SKIN INTERNAL AREA OUTSIDE OF AAR MIAMI REPAIR CAPABILITIES; WINGLET TO BE REPLACED. INSTALL ACCOMPLISHED ON ROUTINE CARD TTG8Q003GNXX AND NR TTG8Q00KPCV0. INSTALLED NEW RIGHT WINGLET REF B737 AMM 57-21-21-400-801 (PENDING TORQUE); INSTALL AND TESTING FINALIZED ON ROUTINE T/C TTG8Q003GNXX.;[02] VERIFIED ALL STEPS

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