SDR BJNA201604020012

Service difficulty report · Strap · Boeing 737400

Difficulty date: April 4, 2016
Submitted: June 6, 2016
Operation: Air carrier
Aircraft: N149XA
Make and model: Boeing 737400
Aircraft serial: 27149
Aircraft time: 55,483 hours, 33,640 cycles
System (JASC): 5315 · Fuselage Main, Floor Beam
Part: Strap
Condition: Cracked
Location: Bs 312
Part time: 55,483 hours, 33,640 cycles
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

E & E COMPARTMENT AT BS 312, RBL 32, WATERLINE 199. FLOORBEAM STABILIZER STRAP HAS A 0.50" CRACK. REMOVED ALL FASTNERS COMMON TO CRACK IAW SRM 51-40-02 AND SRM 53-10-51. STOPPED DRILLED A .250 HOLE AT THE END OF THE CRACK IAW SRM 53-10-51. FABRICATED REPAIR PLATE USING 2024-T3 0.040" IAW SRM 53-10-51. ALODINE, PRIME AND TOPCOAT IAW SRM 51-21-72 AND 51-21-23. INSTALLED REPAIR PLATE IAW SRM 53-10-51 AND 51-40-02. REPAIR DEMINSIONS 2.4" X 4.00".

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