SDR UIEA201000147

Service difficulty report · Stringer · Boeing 7472D7B

Difficulty date: April 28, 2010
Submitted: May 5, 2010
Operation: Air carrier
Aircraft: N524MC
Make and model: Boeing 7472D7B
Aircraft serial: 21784
Aircraft time: 101,810 hours, 21,118 cycles
Engine: Ge CF650E2
System (JASC): 5313 · Fuselage Main, Longeron/Stringer
Part: Stringer
Condition: Cracked
Location: Bs 370-390 S40l
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

THIS EO DOCUMENTS A MAJOR REPAIR. DURING C-CHECK, DAMAGE WAS FOUND IN THE BS 370 - 390, S40L STRINGER, CONSISTING OF A CRACK. THE DAMAGE WAS TRIMMED OUT AND REPAIRED IAW NRC 521 AND SRM 53-10-03, FIGURE 3 (SEE FIGURE 1). THE STRINGER 40L IS MADE FROM 0.040 INCH THICK 2024-T42 CLAD ALUMINUM IAW THE SRM 53-10-20 FIGURE 11, ITEM 3.

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