Service difficulty report · Spar Cap · Doug MD11F

Difficulty date
September 27, 2021
Submitted
October 6, 2021
Operation
Air carrier
Aircraft
N521FE
Make and model
Doug MD11F
Aircraft serial
48478
Aircraft time
84,111 hours, 15,761 cycles
System (JASC)
5711 · Wing Spar
Part
Spar Cap
Part number
ARB74131
Condition
Corroded
Location
Lt 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

LEFT HAND WING REAR SPAR CAP AFT FLANGE FOUND CORROSION AT BETWEEN STATION XORS 711.75 - 715.75. LEFT HAND WING REAR SPAR UPPER CAP , AFT FLANGE UPPER SURFACE BETWEEN STATION XORS 711.75 - 715.75 CORROSION REMOVED AND FOUND EXCEED LIMIT AS PER SRM 57-00-10- 01A ALLOWABLE DAMAGE 1 . FIGURE 101 . REPAIR CARRIED OUT AS PER E.A # 1-5710- T0364313 PART 1 . TITLE : WING - BASIC WING STRUCTURE - CORROSION BLENDOUTS , LEFT HAND OUTER WING UPPER REAR SPAR CAP AFT FLANGE , XORS 670 TO 1040 . REPAIR CLASSIFIED AS MINOR PER GMM 6-2-100.

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